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How To Find What Is Tripping My Circuit Breaker: 5 Causes to Check

Less power can mean more problems, but finding the source of the trip can solve them

Your circuit breaker may continue to trip if it encounters a ground fault surge, a short circuit, or if it overloads. 

If you live in an older home, the tripping may be the result of outdated wiring or an older electrical panel. 

If resetting the breaker doesn’t solve the problem, consult a licensed electrician.

Your circuit breaker has the important task of disrupting electricity to prevent shocks, fires, and other disasters—but sometimes it’s not clear why a circuit breaker trips . Learn how to find out what is tripping your circuit breaker and some common solutions to consider.

1. Ground Fault Surge

A ground fault is when the flow of electricity goes astray and gets redirected to the ground without resistance. This type of fault happens when a “hot” wire contacts a grounding wire or any grounded part of the system, such as the metal electrical box. When your circuit breaker detects the sudden surge in electrical flow, it will cause the breaker to trip.

If someone is standing on the ground where the electricity gets directed, there’s a high risk of electric shock, especially if the ground is damp. This is also a common reason why your circuit breaker trips randomly. If you suspect a ground fault, contact a local electrician to investigate the issue.

2. Short Circuit

Short circuits resemble ground faults because they, too, involve a misdirected flow of electricity. These happen when a hot wire contacts a neutral wire in an electrical outlet, leading to an overloaded current within the circuit. This reaction creates heat, which will trip your breaker to prevent a possible fire.

If you suspect a short circuit, unplug your appliances and check the wires for melted coverings. You might also notice a burning smell coming from the outlet. Call in a professional electrician to find the source of the problem.

3. Circuit Overload

Circuit overloads are the most common reason that a breaker trips. Sometimes you want to microwave some leftovers and blow-dry your hair at the same time. Sure, you’re killing the multitasking game, but this is the perfect recipe for a circuit overload. Certain high-voltage appliances can trip circuit breakers easily, so check out what you plugged in.

Your electrical wires have a finite capacity for electricity, and can only handle a certain flow. When that load gets exceeded, your breaker will cut it off. This action prevents the wires from heating to a dangerous level, potentially causing an electrical fire.

4. Outdated Wiring

If you have an older home with older electrical wiring that hasn’t been updated to meet the needs of more modern appliances, it could lead to more frequent circuit breaker trips. In this case, you could benefit from having a licensed electrician inspect your wiring to see if it’s up to code and if it needs to be updated.

The cost to update your home’s wiring is around $1,500 if it’s a simple job or closer to $10,000 if it’s a whole-house project. A major aspect of updating the wiring is getting the necessary permits, which can also be costly. If the cost is enough to scare you, just keep in mind that your wiring should only be an issue if the home was built before 1960. 

5. Outdated Electrical Panel

In some cases, your circuit breaker may continue to trip because of a malfunctioning electrical panel. Old age or a manufacturing defect could cause the breaker to shut off even when it’s not overloaded or experiencing a short circuit. A small issue with the electrical panel can be repaired by an electrician, but if you need to replace the electrical panel , expect to pay around $1,230 on average, or $500 on the lower end to $4,000 on the higher end. 

What To Do When Your Circuit Breaker Keeps Tripping 

If your circuit breaker continues to trip, try resetting the breaker to see if the problem continues. You could be dealing with an appliance that requires more power than your breaker can handle. If that’s the case, you may need to upgrade your electrical panel to fit the needs of your appliances and other electronic devices so that your power doesn’t keep going in and out. 

However, if the appliances are not to blame, call in your local electrician to assess your power problems and see what can be done to resolve them. Frequent tripping can be a sign of a more extensive and more dangerous issue that could lead to electrical fires or shocks, so it’s best to call in a pro if resetting doesn’t seem to make a difference.

How to Prevent Recurrent Circuit Breaker Trips

Whether you upgrade your electrical panel or have an electrician make a few repairs to your wiring, there are a number of steps you can take to prevent future trips in your circuit breaker. These include:

Limiting the number of devices plugged into one circuit 

Unplugging devices when they’re not in use 

Putting surge protectors in place 

Install GFCI outlets in rooms prone to moisture, such as kitchens and bathrooms 

Have your electrical systems inspected yearly to make sure they’re in good condition and up to code

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Why Is My Circuit Breaker Tripping? 4 Potential Problems and Solutions

By Glenda Taylor , Bob Vila , Evelyn Auer

Updated on Dec 21, 2023 8:55 PM EST

6 minute read

Photo: istockphoto.com

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Q: Every few hours—sometimes minutes!—my living room and one side of my kitchen lose electrical power. I’ll check the breaker panel and, sure enough, a circuit breaker has tripped…again. Should I call an electrician, or is there a simple DIY fix I can try first?

A: While it’s frustrating when a circuit breaker keeps tripping, they are important safety mechanisms. Designed to shut off the electrical current when something goes wrong, circuit breakers are one of the best ways of protecting a home from an electrical fire. “When a circuit breaker trips, typically it is because we use too much electricity, which causes it to overload and turn off,” says Christopher Haas, expert electrician and owner of Haas & Sons Electric in Millersville, Maryland. For those who need an electrical panels 101 refresher course or aren’t sure how to reset circuit breakers, each breaker has an on/off switch and controls a separate electrical circuit in the home. When a breaker trips, its switch automatically flips “off,” and it must be manually turned back on to restore electricity to the circuit. For those wondering, “Is it dangerous if a circuit breaker keeps tripping?” the answer is that it can be, depending on the source of the problem. An electrician can ultimately deal with the root issue, but a little sleuthing will reveal whether it’s something that’s easily remedied.

In many cases, the cause of a circuit breaking tripping is an overloaded circuit.

A circuit overloads when more electrical current is being drawn through the wires than they can handle, tripping the circuit breaker. If this happens, there may be a few additional signs:

• Buzzing noises coming from outlets
• Devices charging slowly
• Electrical outlets not working
• Flickering lights
• Scorch marks on outlets and light switches

If a circuit breaker keeps tripping in one room, homeowners can test for circuit overload by turning off all the switches in the affected area and unplugging all appliances and devices. After the breaker is flipped back on, the devices can be turned back on one at a time, with homeowners waiting a few minutes in between to see if the circuit remains on. If the breaker trips before all the appliances are turned on, the experiment can be repeated, this time turning them on in a different order. It may be necessary to do this several times to find out how many appliances can be operated at once before the circuit overloads.

“As a short-term solution, you can unplug unnecessary appliances to prevent tripping circuit breakers. You may still get some trips, but you can limit them by unplugging devices that you don’t need to use,” advises Dan Mock, vice president of operations at Mister Sparky , an electrical company with 90 locations in the U.S. The best long-term solution, however, is to pay an electrician for the cost to rewire the house and add additional circuits. The cost to replace an electrical panel is about $1,274 on average.

Other times, the issue may be caused by a short circuit.

A “short” circuit means that two wires that should not be coming into contact are inadvertently touching, triggering a sudden surge of electricity through the wires. A short can occur in an outlet, a switch, or within an appliance if wires are loose or have been chewed through by mice or pets. Some signs of a short circuit include:

• Popping sounds
• Discolored outlets or switches
• Burning smells

Testing to see if an appliance has a short is similar to testing for an overloaded circuit. When an appliance that has a short in its wiring is turned on, it will immediately trip the circuit. Homeowners can also try plugging it into an outlet in a different room. If the breaker for that room trips, there’s a short in the appliance (if it’s unclear what breaker goes to what room, the breaker can be identified with one of the best circuit breaker finders ). Electrical shorts can be a major fire hazard, so it’s a good idea to call a licensed electrician for this circuit breaker repair. It’s wise to stop using the outlet or appliance until a pro takes care of the problem.

Another potential cause of a circuit breaker tripping is a ground fault.

A ground fault occurs when the electricity running through a home’s wiring diverts from the wiring loop and travels to the ground, usually due to faulty wiring or water infiltration in an outlet or switch box. Water is a conductor, which is why walking through puddles is often listed as something not to do in a power outage in case of downed power lines. Once water makes contact with wires, electricity can jump from the wiring loop and follow the water trail. This creates a surge in electricity leading to a tripped circuit breaker. If a person comes in contact with the electricity that is on its way to the ground, this can result in electrocution. Homeowners may notice a few signs of a ground fault, including:

• Tripped GFCI (ground fault circuit interrupter) outlets;
• A burning smell coming from an outlet; and
• Lights flickering.

Newer electrical breakers have features designed to protect against the danger of ground faults. According to Haas, “Ground fault breakers sense electricity going to earth as opposed to going through the wires of the circuit. You’ll find [these] for bathrooms, kitchens, garages, exteriors, and basements.” GFCI outlets are another safety feature that shut off the electric current within a fraction of a second of sensing a ground fault.

If a ground fault is the problem, the cause of the errant water must be discovered and repaired, and any damaged wiring must also be replaced. It’s also a good idea to install GFCI outlets in rooms where water is commonly used. A GFCI outlet costs $210 on average.

Sometimes a bad or worn-out circuit breaker can be the culprit.

In some cases, the circuit breaker itself may be faulty. Breakers that are old, damaged, or were installed incorrectly may trip frequently for no apparent reason. Alternatively, faulty breakers may not trip when they are supposed to, leaving the home at risk of electrical fire. Some signs of a bad circuit breaker include:

• The circuit breaker getting hot and tripping frequently;
• The circuit breaker won’t reset;
• It has been over 10 years since the breaker was last serviced; and
• The breaker has scorch marks.

An important electrical safety tip to keep in mind is that resetting a breaker over and over again can cause what is called an arc flash, which is a small electrical explosion that can be deadly. If resetting the breaker once does not remedy the issue, it’s a good idea for the homeowner to hire an electrician near them who knows how to replace a circuit breaker safely. Mock warns, “Don’t take any chances with circuit breakers. Instead, call a licensed electrician who knows the safe ways to replace breaker boxes, upgrade circuits, and diagnose potential electrical problems in your home.” Wiring a breaker box is a job to leave to an experienced electrician.

A professional electrician can help determine the specific cause of a frequently tripping circuit breaker.

Most circuit breaker problems—aside from those explained in the sections above—will need to be inspected and addressed by a licensed electrician. According to the Electrical Safety Foundation International (ESFI) , each year “thousands of people in the United States are critically injured and electrocuted as a result of electrical fires, accidents, [or] electrocution in their own homes.” While homeowners may be tempted to save on electrician costs by attempting circuit breaker replacement or repair themselves, electrical work is not suitable for casual DIYers. “Yes, you have to pay, but you can save many hours of head-scratching by hiring an electrician. Electricians will also have all the right tools for diagnosing and repairing the circuit,” Haas adds. “Lastly, they will come with a warranty/guarantee should something arise, and they will typically return at no additional cost.”

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How to Reset a Tripped Breaker

What to do when a circuit breaker trips.

Lee has over two decades of hands-on experience remodeling, fixing, and improving homes, and has been providing home improvement advice for over 13 years.

The Spruce / Kevin Norris

What Causes a Tripped Circuit Breaker

Safety considerations, how to avoid tripped breakers, when to call a professional.

• Total Time: 5 mins
• Skill Level: Beginner
• Estimated Cost: $0

A power breaker trip is an annoying occurrence when the power shuts off and you can't use the microwave, lights, or router. A breaker trip is far more than simply annoying when you need that router to send off a time-sensitive work assignment or when medical devices are diverted to time-limited standby power. Fortunately, it's easy to fix a circuit breaker trip in just a few minutes.

Tripped Circuit Breaker

A tripped circuit breaker is when a circuit breaker automatically shuts off to prevent devices on the circuit from overheating or from receiving excessive power. A circuit breaker protects your home against damaging or harmful short circuits and overloads.

• Overloaded circuits : When too many devices are operating on the same circuit and are attempting to pull a higher power load than the circuit can carry, the circuit breaker will trip.
• High-power devices : High amp devices like microwaves , dryers , wall heaters , or A/Cs are turned on for sustained periods, they can cause a power breaker trip.
• Short circuits : In a short circuit, a powered or hot wire makes contact with a neutral wire or when wires are loosened .
• Ground faults: In a ground fault, a hot wire touches anything that is grounded, such as the side of a metal electrical box , an appliance, an outlet , or a bare ground wire.

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Watch Now: How to Safely Reset a Tripped Circuit Breaker

Working around an electrical service panel or circuit breaker board can be dangerous. Your home’s entire electrical load is contained in that box, concentrated around the metal lugs where the service drop’s wires enter the box. Unscrewing and removing the inner dead-front cover within the service panel exposes the highly powered lugs.

What You'll Need

Equipment / tools.

• Circuit breaker directory (if available)
• Rubber-soled shoes
• Safety glasses

Instructions

Locate a flashlight.

Circuit breaker panels tend to be located in out-of-the-way locations with little, if any, ambient light. Find a flashlight. Use the light from a phone if necessary.

Turn Off Devices on the Circuit

Turn off all devices on the electrical circuit. This includes the device that may have caused the breaker to trip, such as a microwave, hairdryer, or A/C, plus all other devices on the same circuit.

Find the Electric Service Panel

The electric service panel, sometimes called a circuit breaker board, is a metal box with a door. The box may be inset in a wall, its face flush with the wall, or surface-mounted where the entire box is exposed.

Places to look: garage , closet, pantry near the kitchen, basement , mudroom, hallway leading to garage or backyard.

One clue is to first find the electric service drop from the main power lines. Usually, your home’s service panel is located below and nearby, on the inside of your home.

Open the Door to the Service Panel

Open the door to the service panel by sliding the plastic switch to the side or up. Next, swing the door open. Use the inset plastic switch as a handle to pull the door open.

Adhi Syailendra / Getty Images

Locate Tripped Breaker

The handle of a tripped circuit breaker should be in the middle position—not left or right. Visually or by feel, locate any breaker handles that differ from the right or left positions:

• Tripped breakers : Tripped circuit breakers have a soft or springy feeling when you lightly press them leftward or rightward.
• Live/active breakers : Breakers that are not tripped are either firmly left or right (depending on which side of the box you're looking at).

Certain breakers, such as Eaton breakers , trip to the off position, not the middle position. Check manufacturer's instructions for your particular product.

Turn the Circuit Breaker Handle to OFF Position

Flip the circuit breaker handle to its firm OFF position, toward the outer edge of the service panel (away from the centerline).

Double and Tandem Breakers

Double pole breakers are double-wide breakers with wide handles. They are often used for dryer or oven circuits. Both sides of double pole breakers operate as one. Tandem breakers are two narrow breakers that share the space of one breaker. Each side operates individually.

Turn the Circuit Breaker Handle to ON Position

Flip the circuit breaker handle to its firm ON position, toward the centerline of the service panel. The handle should seat firmly in place and should make an audible click.

Test Circuit

Turn the device such as the light or A/C back on. If you believe the breaker tripped due to an overload, it’s best to turn on only one device at this time, not multiple devices. Also, choose a device with a lower power draw such as a light fixture.

• Remove some devices from the overloaded circuit and plug them into other circuits that aren’t drawing as much power.
• Avoid running many devices on the circuit at the same time. In a kitchen , for example, stage cooking activities that require power so that they happen in succession, not all at once.
• Install GFCI outlets so that the outlet shuts off before the entire circuit breaker shuts down in the case of a ground circuit. Just note that GFCI outlets are not circuit overload protection, but protection against dangerous ground faults.
• Replace old outlets, light fixtures, and switches which may create short circuits or trip breakers.
• Have an electrician separate hardwired devices that are drawing too much power from a single circuit. The electrician can move devices to another circuit or can set up an entirely new circuit to relieve the load.
• Replace the circuit breaker.

A qualified, licensed electrician is trained to detect the cause of tripped breakers and to fix those causes. If your problem of tripped circuit breakers is more than just an overloaded circuit, you may want to seek the help of an electrician. Unless you are an advanced do-it-yourselfer , it’s best to hire an electrician to wire up a new circuit breaker .

Electrical Panel Safety . Office of Congressional Workplace Rights.

CH Circuit Breakers . Eaton.

Ground-Fault Circuit Interruptors . International Association of Certified Home Inspectors.

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What is the purpose of a Trip Switch?

Understanding the trip switch: a guide to electrical safety.

The trip switch, often referred to as a circuit breaker or residual-current device (RCD), plays a crucial role in safeguarding our homes and businesses from electrical hazards. This essential component monitors the flow of electricity within a circuit and automatically cuts off power when it detects a fault, such as an overload or a short circuit. In this blog post, we’ll delve into the importance of trip switches, how they work, and why they are a fundamental aspect of electrical safety.

What is a Trip Switch?

A trip switch is a safety device designed to protect electrical circuits from overloads, faults, and other electrical issues that could pose a risk to property and personal safety. When an abnormal electrical condition is detected, such as a surge in current or a ground fault, the trip switch immediately interrupts the circuit to prevent potential damage to appliances, wiring, and the risk of fire or electric shock.

How Does a Trip Switch Work?

The basic principle behind a trip switch is simple yet effective. It continuously monitors the electrical current flowing through a circuit. If the current exceeds a predetermined threshold or deviates from its normal path, indicating a fault, the trip switch quickly triggers a mechanism to cut off the power supply. This rapid response helps to minimize the risk of electrical fires, equipment damage, and personal injury.

Why is a Trip Switch Important?

Ensuring the proper functioning and maintenance of trip switches is crucial for electrical safety in both residential and commercial settings. A malfunctioning or outdated trip switch can fail to respond to electrical faults, leaving your property vulnerable to potential hazards. Regular inspections, testing, and timely replacement of trip switches are essential to ensure they are functioning correctly and providing reliable protection against electrical faults.

In conclusion, the trip switch is a vital component of modern electrical systems, serving as a first line of defense against electrical hazards. By continuously monitoring and interrupting abnormal electrical conditions, trip switches play a pivotal role in safeguarding our homes, businesses, and loved ones. Regular maintenance and proactive monitoring of trip switches are key to ensuring their effectiveness and maintaining a safe and secure electrical environment. If you have concerns about your trip switch or need professional assistance with electrical safety measures, don’t hesitate to contact MR AMP. Our team of experienced electricians is here to help you with all your electrical needs and ensure the safety and reliability of your electrical systems.

Introduction

• Codes and Standards
• Features and Benefits
• MasterPact NW Circuit Breaker Design
• MasterPact NW Cradle Design
• MasterPact NW with ArcBlock<span><span><span style="font-family: Arial; ">™</span></span></span> Technology
• MasterPact NT Circuit Breaker and Cradle Design
• Correction Factors
• Shipping Weights
• MasterPact Circuit Breakers with MicroLogic Trip Units
• Power Meter Functions
• Display Function
• Instantaneous RMS Measurements
• Maximum / Minimum Ammeter
• Energy Metering
• Demand and Maximum Demand Values
• Power Quality
• Contact Wear
• Circuit Breaker Load Profile
• Management of Installed Devices
• Display of MicroLogic Trip Unit Measurements and Alarms
• Status Indications and Remote Control
• Main Characteristics
• Communication Components and FDM121 Connections
• Display of MicroLogic Trip Unit Measurements and Trips
• Status Indications
• Remote Control
• Communication Components and FDM128 Connections

Thermal Imaging

Ammeter (a) trip unit without 24 vdc power supply at f1 and f2, ammeter (a) trip unit with 24 vdc power supply at f1 and f2, power (p) and harmonic (h) trip unit without 24 vdc power supply at f1 and f2, power (p) and harmonic (h) trip unit with 24 vdc power supply at f1 and f2, true rms current sensing, protection settings, ammeter measurements, communication network, configuring alarms and other protection functions, maintenance record, load shedding and reconnection parameters, indication option via programmable contacts, trip and alarm histories, waveform capture, customized alarm programming, additional technical characteristics for type p and type h trip units.

Long-Time Trip Functions

Short-Time Trip Functions

Instantaneous trip function.

Ground-Fault Trip Functions

Wiring System ULP

Four functional levels, modbus principle, ethernet principle, com option in masterpact circuit breakers, ife interface, ife interface + gateway description, 24 vdc power supply, required circuit breaker communication modules, characteristics, technical characteristics, simplified ifm installation, description, io (input/output) application module for low-voltage circuit breaker resources, pre-defined application, user-defined applications, application rotary switch, setting locking pad, compatible devices (configuration and device management).

• Options for Remote Operation
• Spring-Charging Motor (MCH)
• Shunt Trip (MX1) and Shunt Close (XF)
• Additional Shunt Trip (MX2) or Undervoltage Trip (MN)
• Time-Delay Module for Undervoltage Trip
• Ready-to-Close Switch (PF)
• Electrical Closing Push Button (BPFE)
• Remote Reset (RES) and Automatic Reset After Fault Trip
• Auxiliary Switch (OF)
• Overcurrent Trip Switch (SDE)
• Connected Closed Switch (EF)
• Cradle Position Switch
• External Neutral Current Transformer (CT)
• External Sensor for Source Ground-Return (SGR) and Modified Differential Ground-Fault (MDGF) Protection
• Metering Current Transformers (CTs)
• Voltage Measurement Inputs
• Sensor Plugs
• Adjustable Rating Plugs
• External Power Supply Module
• External Battery Backup Module
• M2C/M6C Programmable Contact Modules
• Zone-Selective Interlocking (ZSI)
• Restraint Interface Module (RIM)
• Cradle Connections
• Hand-Held Test Kit
• Full-Function Test Kit
• Lockable Push Button Cover
• Open Position Padlock and Key Lock Provisions
• Disconnected Position Locking
• Door Interlock (VPEC)
• Racking Interlock Between Racking Handle and Off Position (IBPO)
• Cable Door Interlock Kit
• Source Changeover Interlocks
• Open Door Racking Interlock (VPOC)
• Automatic Spring Discharge Mechanism (DAE)
• Cradle Rejection Kits
• Rail Padlocking
• Mechanical Operation Counter (CDM)
• Shutter and Shutter Lock
• Door Escutcheon (CDP)
• Transparent Cover (CCP) for Door Escutcheon
• MasterPact NW Remote Racking Device
• Wiring Diagrams for MasterPact NW Circuit Breakers
• Wiring Diagrams for MasterPact NT Circuit Breakers
• Additional Wiring Information for MasterPact NW NT Circuit Breakers
• MasterPact NT Enclosure Information
• UL<span><span><span style="font-family: Arial; "> ® </span></span></span> and ANSI Three-Pole Drawout Circuit Breakers
• UL and ANSI Three-Pole Fixed Circuit Breakers
• UL and ANSI Four-Pole Drawout Circuit Breakers
• UL and ANSI Four-Pole Fixed Circuit Breakers
• IEC Three-Pole Drawout Circuit Breakers
• IEC Three-Pole Fixed Circuit Breakers
• IEC Four-Pole Drawout Circuit Breakers
• IEC Four-Pole Fixed Circuit Breakers
• Neutral Current Transformers
• Enclosure Information
• UL<span><span><span style="font-family: Arial; "> ® </span></span></span>/ANSI Three-Pole Drawout Circuit Breakers
• UL/ANSI Three-Pole Fixed Circuit Breakers
• UL/ANSI Four-Pole Drawout Circuit Breakers
• UL/ANSI Four-Pole Fixed Circuit Breakers
• Accessory Dimensions
• Overview of Selection Procedure
• T-Frame Circuit Breaker Selection
• T-Frame Switch Selection
• W-Frame Circuit Breaker Selection
• W-Frame Switch Selection
• Y-Frame Circuit Breaker Selection
• Y-Frame Switch Selection
• MicroLogic 6.0 A/P/H Trip Units
• MicroLogic 5.0/6.0 A/P/H Trip Unit
• MicroLogic 3.0 Trip Units
• MicroLogic 2.0A Trip Unit
• Instantaneous Override Values No. 613.10
• MasterPact NW/NT Low Arc Flash Circuit Breakers

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MicroLogic ™ Electronic Trip Systems

Overview of micrologic trip systems, p trip unit with power metering.

All MasterPact circuit breakers are equipped with the MicroLogic trip system to protect power circuits and loads. MicroLogic trip systems use a set of current transformers (called CTs or sensors) to sense current, a trip unit to evaluate the current, and a tripping solenoid to trip the circuit breaker. Adjustable rotary switches on the trip unit allow the user to set the proper overcurrent or equipment ground-fault current protection required in the electrical system. If current exceeds a set value for longer than its set time delay, the trip system opens the circuit breaker. Alarms may be programmed for remote indications. Measurements of current, voltage, frequency, power, and power quality optimize continuity of service and energy management. MicroLogic trip units can be changed on-site.

Integration of protection functions in the Application Specific Integrated Circuit (ASIC) electronic component used in all MicroLogic trip units guarantees a high degree of reliability and immunity to conducted or radiated disturbances. On MicroLogic P and H trip units, advanced functions are managed by an independent microprocessor.

MasterPact circuit breakers are shipped with the long-time pickup switch set at 1.0 and all other trip unit adjustments set at their lowest settings. Actual settings required for a specific application must be determined by a qualified consultant or plant engineer. A coordination study is recommended to provide coordination between all circuit breakers in the distribution system.

The thermal imaging function protects the cables or bus bars from overheating in case of low amplitude repetitive faults. Such overheating can be due to repetitive motor starting, fluctuating load, intermittent ground faults, or subsequent closing after a fault.

Traditional electronic protection does not protect against repetitive faults because the duration of each overload above the pickup setting is too short to achieve effective tripping. Nevertheless, each overload involves a temperature rise in the installation, the cumulative effect of which could lead to overheating of the system.

The thermal imaging function remembers and integrates the thermal heating caused by each pickup setting overrun. Before tripping, the integrated heating value will reduce the associated time delay and, therefore, the reaction of the trip unit will be closer to the real heating of the power network system.

After tripping, the function will also reduce the time delay when closing the circuit breaker on an overload.

Power Supply Information

Provides fault protection for LSIG functions.

Provides LED trip indication (powered by an onboard battery).

All display functions and trip unit features power-up with current flow on one phase greater than or equal to the values in the table to the left.

Ground-fault push-to-trip button works for testing ground fault with current flow on one phase greater than or equal to the values shown in the following table.

The Ammeter (A) trip unit provides all of the above plus additional functionality when powered by external 24 Vdc power supply:

Ammeter and bar graph displays are functional with or without current flowing through the circuit breaker.

Trip settings and (Max) current readings can be accessed on the display by pressing navigation button with or without current flowing through the circuit breaker.

The ground-fault push-to-trip button works for testing ground fault with or without current flowing through the circuit breaker.

Optional Modbus™ communications—also requires a separate 24 Vdc power supply for the circuit breaker communications module.

The P and H trip units were designed to be used with the external 24 Vdc power supply. The large LCD display requires too much current to be powered by current flow through the circuit breaker. The P and H trip units do have a voltage power supply which will power the trip unit with 100 Vac or more between two phases or phase to neutral. The standard configuration for the voltage probes inside the circuit breaker is at the bottom connections. If the circuit breaker was open in a top fed application, there would be no voltage at the bottom of the circuit breaker and the trip unit would not be powered.

Provides all of the above.

LCD display and backlight are functional.

Ground-fault push-to-trip button works for testing ground fault.

All metering, monitoring, and history logs are functional.

Communications from trip unit to M2C and M6C programmable contact modules are powered by a 24 Vdc supply at F1 and F2. M6C also requires a 24 Vdc external power supply.

Modbus communications—also requires a separate 24 Vdc power supply for the circuit breaker communications module.

MicroLogic Trip Units — Overview

The sensing system responds to the flow of current through the circuit breaker. Electronic trip circuit breakers are limited to ac systems because the electronic trip system uses current transformers to sense the current. The MicroLogic trip unit samples the current waveform to provide true RMS protection through the 15th harmonic.

This true RMS sensing gives accurate values for the magnitude of a non-sinusoidal waveform. Therefore, the heating effects of harmonically distorted waveforms are accurately evaluated.

The MicroLogic H trip unit provides additional sampling of the waveforms to measure and provide waveform capture of harmonic distortion to the 31st harmonic.

MasterPact universal power circuit breakers use MicroLogic electronic trip systems to sense overcurrents and trip the circuit breaker. The MicroLogic basic trip unit is standard and all MasterPact circuit breakers can be equipped with the optional MicroLogic trip systems listed below:

MicroLogic Basic Trip Unit (standard).

— 2.0 basic protection (LS0, IEC)

— 3.0 basic protection (LI, UL ® /ANSI)

— 5.0 selective protection (LSI)

MicroLogic A: Trip Unit with Ammeter.

— 2.0A basic protection (LS0, IEC)

— 3.0A basic protection (LI, UL/ANSI)

— 5.0A selective protection (LSI)

— 6.0A selective protection with ground-fault protection for equipment (LSIG)

MicroLogic P: Trip Unit with Power Metering.

— 5.0P selective protection (LSI)

— 6.0P selective protection with ground-fault protection for equipment (LSIG)

MicroLogic H: Trip Unit with Harmonic Metering.

— 5.0H selective protection (LSI)

— 6.0H selective protection with ground-fault protection for equipment (LSIG)

MicroLogic Trip Unit Features

Micrologic 2.0, 3.0 and 5.0 basic trip units.

The MicroLogic 2.0, 3.0, and 5.0 trip units protect power circuits.

Protection thresholds and delays are set using the rotary switches.

A full-range of long-time settings are available via the field-installable adjustable rating plugs.

Overload protection

— True RMS long-time protection

— Thermal imaging: active thermal imaging before and after tripping

Short-circuit protection

— Short-time RMS

— Selection of I 2 t type (ON or OFF) for short-time delay

Instantaneous protection

Neutral protection on four-pole circuit breakers

MicroLogic 5.0 Basic Trip Unit

MicroLogic 2.0 and 3.0 Basic Trip Unit Settings

MicroLogic 5.0 Basic Trip Unit Settings

Micrologic 2.0a, 3.0a, 5.0a and 6.0a trip units with ammeter.

MicroLogic A trip units protect power circuits and provide current measurements, overload protection, and short-circuit protection. In addition, the 6.0A trip units also provide ground-fault protection for equipment.

Protection thresholds and delays are set using the rotary switches. The selected values are momentarily displayed in amperes and in seconds. A full-range of long-time settings are available via the field-installable rating plug.

Overload protection (true RMS long-time protection)

Thermal imaging (active thermal imaging before and after tripping)

— I 2 t ON or OFF for short-time delay

Ground-fault protection for equipment

— Residual ground-fault protection for equipment

— Source ground-return ground-fault protection for equipment

— Modified differential ground-fault protection (MDGF) for equipment

ZSI: Zone-selective interlocking

— A ZSI terminal block may be used to interconnect a number of trip units to provide total discrimination for short-time and equipment ground-fault protection, without delay for tripping

— Not available for 3.0 A trip unit

— Not available for 2.0 A trip unit if installed as upstream device

MicroLogic 6.0A Trip Unit

MicroLogic A trip units measure the true RMS value of currents. They provide continuous current measurement from 0.2 to 20 x I n with an accuracy of 1.5% (including sensors). No auxiliary source is needed where I > 0.2 x I n . The optional external power supply (24 Vdc) makes it possible to display currents where I < 0.2 x I n and to store values of the interrupted current. A digital LCD screen continuously displays the most heavily loaded phase (Imax) or displays the Ia, Ib, Ic, Ig, and (on four-pole circuit breakers only) In stored current and setting values by successively pressing the navigation button.

Four wire Modbus, RTU, RS485 or two wire Modbus, TRU, RS485 plus ULP. See Additional Wiring Information for MasterPact NW NT Circuit Breakers .

In conjunction with an optional communication network, the trip unit transmits the following parameters:

Setting values.

All ammeter measurements.

Tripping causes.

MicroLogic 2.0A and 3.0A Trip Unit Settings

MicroLogic 5.0A and 6.0A Trip Unit Settings

MicroLogic 6.0A Trip Unit Ground-Fault Settings

Micrologic 5.0p and 6.0p trip units with power metering.

The adjustable protection functions of the 5.0P and 6.0P trip units are identical to those of MicroLogic A trip unit (overloads, short circuits, equipment ground-fault protection); see MicroLogic 2.0A, 3.0A, 5.0A and 6.0A Trip Units with Ammeter .

These units also feature:

Fine adjustment : Within the range below the rotary switch setting, fine adjustments of pickups/delays in steps of 1 A/s (except for short-time and ground-fault) are possible on the keypad or remotely by the communication network.

Inverse definite minimum time lag (IDMTL) setting : Coordination with fuse-type or medium-voltage protection systems is optimized by adjusting the long-time delay curve around 6 x I r axis. This setting ensures better coordination with certain loads.

Neutral protection : On three-pole circuit breakers, neutral protection may be set using the keypad or remotely using the communication network to one of four positions:

— 1/2N (1/2 x I n )

— 1N (1 x I n )

— 2N (2 x I n )

MicroLogic 6.0P Trip Unit

When the cover is closed, the keypad may no longer be used to change the protection settings, but it still provides access to the displays for measurements, histories, indicators, etc. Depending on the thresholds and time delays set, the MicroLogic P trip unit monitors current, voltage, power, frequency, and phase sequence. Each threshold overrun may be signalled remotely via the communication network.

Each threshold overrun may be combined with tripping (protection) or an indication carried out by an optional M2C/M6C programmable contact (alarm), or both (protection and alarm).

The maintenance record can be consulted using the full-function test kit or remotely via the communication network. It can be used as an aid in troubleshooting and to assist scheduling for device maintenance operations.

Recorded indications include:

Highest current measured

Operation counter (both cumulative total and total since last reset)

Number of test kit connections

Number of trips in operating mode

Contact wear (MasterPact NW only)

Load shedding and reconnection parameters can be set according to the power or the current flowing through the circuit breaker. Load shedding is carried out by a remote computer via the communication network or by an M2C or M6C programmable contact.

The M2C (two contacts) and M6C (six contacts) programmable contacts may be used to signal threshold overruns or status changes. They can be programmed using the keypad on the MicroLogic P and H trip units or remotely using the communication network. These contacts are required to obtain data from the protective relay functions on Type P and Type H trip units.

MicroLogic 5.0P and 6.0P Trip Unit Settings

Micrologic 6.0p trip unit ground-fault setting, settings for alarms for other protection functions for micrologic 5.0p and 6.0p trip units, load-shedding settings for current and power metering for micrologic 5.0p and 6.0p trip units.

The last ten trips and ten alarms are recorded in two separate history files that can be displayed on the screen (sample displays are shown to the right). The following information is contained in these files:

The MicroLogic P trip unit calculates in real time all electrical values V, A, W, VAR, VA, Wh, VARh, VAh, Hz, power factor, and crest factor. The MicroLogic P trip unit also calculates demand current and demand power over an adjustable time period.

Real-Time Metering: The value displayed on the screen is refreshed every second. Minimum and maximum measurement values are stored in memory.

Demand Metering: The demand is calculated over a fixed or sliding time window that can be programmed from five to sixty minutes. Depending on the contract signed with the power supplier, specific programming makes it possible to avoid or minimize the cost of overrunning the subscribed power. Maximum demand values are systematically stored and time stamped.

Four wire Modbus, RTU, RS485—The communication network may be used to:

Remotely read parameters for the protection functions.

Transmit all the measurements and calculated values.

Signal the causes of tripping and alarms.

Consult the history files and the maintenance indicator record.

In addition, an event log of the last 100 events and a maintenance record, which is stored in the trip unit memory but not available locally, may be accessed via the communication network.

The Modbus communication system is compatible with Powerlogic™ System Manager™ (SMS) software.

The event log may be accessed by a remote computer via the communication network. All events are time stamped and include:

Beginning and end of alarms

Modifications to settings and parameters

Loss of time

Overrun of wear indicators

Test kit connections

Counter resets

System faults (thermal self-protection, major fault and minor fault alarms)

MicroLogic 5.0H and 6.0H Trip Units with Harmonic Metering

In addition to the P functions, the MicroLogic H trip units offer:

In-depth analysis of power quality including calculation of harmonics and the fundamentals.

Diagnostics aid and event analysis through waveform capture.

Customized alarm programming to analyze and track down a disturbance on the ac power system.

Systematic time stamping of all events and creation of logs.

The MicroLogic H trip unit offers all the measurements carried out by the MicroLogic P trip unit, with the addition of phase-by-phase measurements of power and energy as well as calculation of:

Current and voltage total harmonic distortion (THD, thd).

Current, voltage and power fundamentals (50/60 Hz).

Harmonic components (amplitude and phase) up to the 31st current and voltage harmonic.

Real-Time Metering : The value displayed on the screen is refreshed every second. The table below shows what is measured in real-time metering.

Demand Metering : Similar to the MicroLogic P trip unit, demand values are calculated over a fixed or sliding time window that can be set from five to 60 minutes.

MicroLogic H trip units can capture and store current and voltage waveforms using digital sampling techniques similar to those used in oscilloscopes. Using the information available in the captured waveform, it is possible to determine the level of harmonics as well as the direction and amplitude of the flow of harmonic power.

Users of MicroLogic H trip units can record manually via the keypad the following waveforms:

The four currents: I a , I b , I c , and I N

The three phase-to-phase voltages: V ab , V bc , and V ca

Waveforms may be displayed on the graphic screen of MicroLogic H trip units or communicated over a networked system. The recording takes place over one cycle with a measurement range of 0 to 1.5 I N for current and 0 to 690 volts for voltage. The resolution is sixty-four points per cycle.

The instantaneous value of each measurement can be compared to user-set high and low thresholds. Overrun of a threshold generates an alarm. Programmable action can be linked to each alarm, including circuit breaker opening, activation of an M2C or M6C contact, recording of measurements in a log, etc.

Each event is recorded with:

The date, time, and name of the event.

The event characteristics.

Setting the display language: System messages can be displayed in six different languages:

English - US

English - UK

The desired language is selected via the keypad.

Protection functions: All current-based protection functions require no auxiliary source. Voltage-based protection functions are connected to ac power via a voltage measurement input built into the circuit breaker on the bottom side. (Optional external voltage measurement is available.)

Accuracy of measurements (including sensors):

Voltage (V) 1%

Current (A) 1.5% (higher accuracy [1%] may be achieved with special calibration on the current transformer [CT characterization option])

Frequency (Hz) 0.1 Hz

Power (W) and energy (Wh) 2.5%

The MicroLogic H trip unit uses a dedicated metering data chain separate from the protection data chain so that a greater number of data samples can be used for metering. This increases the number of samples taken per time period, which in turn gives the H trip unit a higher degree of metering accuracy.

Stored information: The fine setting adjustments, the last 100 events and the maintenance record remain in the trip unit memory even when power is lost.

Reset: An individual reset, via the keypad or remotely, will reset alarms, minimum and maximum data, peak values, counters and the indicators.

MicroLogic Trip Unit Functions

The long-time pickup switch sets the maximum current level the circuit breaker will carry continuously. The maximum current level (I r ) is the long-time pickup setting multiplied by the sensor plug amperage (I n ). If the current exceeds this value for longer than the long-time delay time, the circuit breaker will trip.

The long-time delay switch sets the length of time that the circuit breaker will carry a sustained overload before tripping. Delay bands are labeled in seconds of overcurrent at six times the ampere rating. For maximum coordination, there are eight delay bands. Long-time delay is an “inverse time” characteristic in that the delay time decreases as the current increases.

The trip unit includes an alarm indicator  that will be lit continuously when the current is above 100% of the pickup setting.

Short-Time and Instantaneous Trip Functions

The short-time pickup switch sets the short-circuit current level at which the circuit breaker will trip after the set short-time delay. The short-time current (I sd ) equals the short-time pickup setting multiplied by the long-time pickup (I r ).

The short-time delay switch sets the length of time the circuit breaker will carry a short circuit within the short-time pickup range. The delay (based on 10 times the ampere rating I r ) can be adjusted to four positions of I 2 t ramp operation (I 2 t ON) or five positions of fixed time delays (I 2 t OFF). I 2 t ON delay is an “inverse time” characteristic in that the delay time decreases as the current increases. Short-time delay for the 2.0 trip unit is fixed at a delay band of 20 to 80 ms.

The instantaneous pickup switch sets the short-circuit current level at which the circuit breaker will trip with no intentional time delay. The instantaneous current (I i ) is equal to the instantaneous pickup setting multiplied by the sensor plug amperage (I n ).

The instantaneous function will override the short-time function if the instantaneous pickup is adjusted at the same or lower setting than the short-time pickup. In trip units with both adjustable short-time and instantaneous trip functions, the adjustable instantaneous trip can be disabled by setting Instantaneous pickup to OFF.

The ground-fault pickup switch sets the current level at which the circuit breaker will trip after the set ground-fault delay. Ground-fault pickup values (I g ) are based on circuit breaker sensor plug (I n ) only, not on the rating plug multiplier (I r ). Changing the rating plug multiplier has no effect on ground-fault pickup values.

The ground-fault delay switch sets the length of time the circuit breaker will carry ground-fault current which exceeds the ground-fault pickup level before tripping. The delay (based on the sensor plug amperage (I n ) can be adjusted to four positions of I 2 t ramp operation (I 2 t ON) or five positions of fixed time delays (I 2 t OFF). I 2 t ON delay is an “inverse time” characteristic in that the delay time decreases as the current increases.

Enerlin'X Communication Wiring System

The wiring system is designed for low-voltage power switchboards. Installation does not require special tools or training. The prefabricated wiring ensures both data transmission (Modbus protocol) and 24 Vdc power distribution for the communications modules on the MicroLogic trip units.

The MasterPact can be integrated into Ethernet and Modbus communication environments.

There are four possible functional levels that can be combined.

The Modbus RS 485 (RTU protocol) system is an open bus on which communicating Modbus devices (MasterPact NW with Modbus COM, Power Meter PM700, PM800, PowerPact P/Rframe, etc.) are installed. All types of PLCs and microcomputers may be connected to the bus.

The Modbus communication parameters (address, baud rate, parity) are entered using the keypad on the MicroLogic A, P, or H trip unit. For a switch, it is necessary to use the Electrical Asset Manager or RSU (Remote Setting Utility) MicroLogic utility.

Number of Devices

The maximum number of devices that may be connected to the Modbus bus depends on the type of device (ComPact circuit breaker with Modbus COM, PM700, PM800, MasterPact circuit breaker, etc.), the baud rate (19200 is recommended), the volume of data exchanged and the desired response time. The RS 485 physical layer offers up to thirty-two connection points on the bus (one master, thirty-one slaves).

Length of Bus

The maximum recommended length for the Modbus bus is 3940 feet (1200 meters).

Bus Power Source

A 24 Vdc power supply is required (less than 20% ripple, insulation class II).

Ethernet is a data link and physical layer protocol defined by IEEE 802 10 and 100 Mbps specifications that connects computer or other Ethernet devices. Ethernet is an asynchronous Carrier Sense Multiple Access with Collision detection (referred as CSMA/CD) protocol. Carrier Sense means that the hosts can detect whether the medium (coaxial cable) is idle or busy.

Multiple Access means that multiple hosts can be connected to the common medium. Collision Detection means a host detects whether its transmission has collided with the transmission of another host (or hosts).

IFE Ethernet interface can be connected to a PC or a laptop over Ethernet. The maximum length of Ethernet cable is 325 feet (100 meters). IFE Ethernet interface + gateway provides a Modbus TCP/IP gateway over Ethernet to enable Modbus TCP communication from a Modbus TCP master to any Modbus slave devices connected to it. The maximum active Modbus TCP client connection is twelve.

IFE Ethernet interface has an embedded web server (web page).

All Masterpact devices can be fitted with the communication function thanks to the COM option. Masterpact uses the Ethernet or Modbus communications protocol for full compatibility with the supervision management systems.

For fixed and drawout devices, the common communication option is made up of:

BCM ULP Module

A BCM ULP module, installed behind the MicroLogic trip unit and supplied with a set of switches (OF, SDE, PF and CH switches), a kit for connection to shunt close (XF) and shunt trip (MX1) communicating voltage releases, and a COM terminal block (inputs E1 to E6). This module is independent of the trip unit and receives and transmits information on the communication network. An infra-red link transmits data between the trip unit and the communication module. (Consumption: 30 mA, 24 V)

The IFM module, the Modbus interface for connection to the network, contains the Modbus address (1 to 99) declared by the user using the two dials in front. It automatically adapts (baud rate, parity) to the Modbus network in which it is installed.

The IFE module, the Ethernet interface for low-voltage circuit breakers, enables an intelligent modular unit (IMU) such as a Masterpact NT/NW or PowerPact circuit breaker to be connected to an Ethernet network. Each circuit breaker has its own IFE and a corresponding IP address.

For drawout devices the Cradle Management option must be added:

IO Application Module

The IO (Input/Output) application module for low-voltage circuit breakers is delivered with the drawout devices ordered with the COM option for cradle management. It must be installed on a steel DIN rail that is properly grounded near the device. The IO module must be connected to the ULP system and to the cradle position contacts (CD, CT, CE) that transmit the position of the circuit breaker in the cradle.

For communicating remote control, shunt close (XF) and shunt trip (MX1) communicating voltage releases must be added:

The shunt close (XF) and shunt trip (MX1) communicating voltage releases are equipped for connection to the communication module.

The remote-tripping function shunt trip (MX2) and undervoltage release (MN) are independent of the communication option. They are not equipped for connection to the communication module.

Communication Architecture–Electrically Operated

IFE Ethernet Interface

IFE Interface

The IFE interface and IFE interface + gateway enable low-voltage circuit breakers such as MasterPact NT/NW or PowerPact P/R-frame to be connected to an Ethernet network.

Provides Ethernet access to a single low-voltage circuit breaker.

Function: Interface - one circuit breaker is connected to the IFE interface using its ULP port.

IFE Interface + Gateway

Provides Ethernet access to one or several low-voltage circuit breakers.

Interface - one circuit breaker is connected to the IFE interface using its ULP port.

Gateway: several circuit breakers on a Modbus network are connected using the IFE interface + gateway master Modbus port.

IFE Interface, IFE Interface + Gateway Features

Dual 10/100 Mbps Ethernet port for simple daisy chain connection.

Device profile web service for discovery of the IFE interface, IFE interface + gateway on the LAN.

Ethernet interface for MasterPact and PowerPact circuit breakers.

Gateway for Modbus-SL connected devices (IFE interface + gateway only).

Embedded set-up web pages.

Embedded monitoring web pages.

Embedded control web pages.

Built-in e-mail alarm notification.

IFE Interface, IFE Interface + Gateway Screen

The IFE interface and IFE interface + gateway are DIN rail mounted devices. A stacking accessory enables the user to connect several IFMs (ULP to Modbus interfaces) to an IFE interface + gateway without additional wiring.

The IFE interface and the IFE interface + gateway must always be supplied with 24 Vdc.

The IFMs stacked to an IFE interface + gateway have power supplied by the IFE interface + gateway, thus it is not necessary to supply them separately. It is recommended to use a UL listed and recognized limited voltage/limited current or a class 2 power supply with a 24 Vdc, 3 A maximum.

The connection to an IFE interface or IFE interface + gateway requires a communication module embedded into the circuit breaker:

MasterPact NT/NW (fixed or drawout) circuit breakers: BCM ULP communication module

Drawout MasterPact NT/NW circuit breakers: BCM ULP and its respective IO (Input/Output) application module.

All connection configurations for MasterPact NT/NW circuit breakers require the circuit breaker ULP cord. The insulated NSX cord is mandatory for system voltages greater than 480 Vac. When the second ULP RJ45 connector is not used, it must be closed with a ULP terminator (TRV00880).

Network Communication Interface

Ifm modbus communication interface.

IFM Modbus Communication Interface. Ref.: TRV00210

An IFM Modbus communication interface is required for connection of a MasterPact or PowerPact circuit breaker to a Modbus network as long as this circuit breaker is provided with a ULP (Universal Logic Plug) port. The port is available on the BCM ULP.

Once connected, the circuit breaker is considered as a slave by the Modbus master. Its electrical values, alarm status, open/close signals can be monitored or controlled by a Programmable Logic Controller or any other system.

Two RJ45 sockets, internal parallel wiring.

Connection of a single circuit breaker.

A ULP line terminator or an FDM121 display unit must be connected to the second RJ45 ULP socket.

The RJ45 sockets deliver a 24 Vdc supply fed from the Modbus socket.

Built-in test function, for checking the correct connection to the circuit breaker and FDM121 display unit.

Modbus Slave Port

Top socket for screw-clamp connector, providing terminals for:

— 24 Vdc input supply (0 V, +24 V)

— Modbus line (D1, D2, Gnd) 2-wire Modbus system

Lateral socket, for DIN-rail stackable connector. Both top and lateral sockets are internally parallel wired.

Multiple IFMs can be stacked, thus sharing a common power supply and Modbus line without individual wiring.

On the front face:

— Modbus address setting (1 to 99): two coded rotary switches

— Modbus locking pad: enables or disable the circuit breaker remote control and modification of IFM parameters

Self-adjusting communication format (Baud rate, parity).

Stacking an IFM

The IO (Input/Output) application module for an low-voltage circuit breaker is part of an ULP system with built-in functions and applications to enhance the application needs. The ULP system architecture can be built without any restrictions using the wide range of circuit breakers.

The IO application module is compliant with the ULP system specifications.

Two IO application modules can be connected in the same ULP network.

The ranges of low-voltage circuit breakers enhanced by the IO application module are:

MasterPact NW

MasterPact NT

PowerPact R-Frame

PowerPact P-Frame

The IO application module resources are:

Six digital inputs that are self powered for either NO and NC dry contact or pulse counter.

Three digital outputs that are a bistable relay (5 A maximum).

One analog input for PT100 temperature sensor.

The pre-defined application adds new functions to the IO application module by:

Selection by the application rotary switch on the IO application module, defining the application with pre-defined input/output assignment and wiring diagram.

No additional setting with the customer engineering tool required.

The resources not assigned to the pre-defined application are free for additional user-defined applications:

cradle management

circuit breaker operation

cradle management + ERMS (Energy Reduction Maintenance Setting)

light and load control

User-defined applications are processed by the IO application module in addition to the pre-defined application selected.

The user-defined applications are available depending on:

the pre-defined application selected

the IO application module resources (inputs and outputs) not used by the application

The resources required by user-defined applications are assigned using the customer engineering tool:

energy management

The IO application module is a DIN rail mounted device. Install on a steel DIN rail that is properly grounded near the device.

The application rotary switch enables the selection of the pre-defined application. It has nine positions and each position is assigned to a pre-defined application. The factory set position of the switch is pre-defined application one.

The setting locking pad on the front panel of the IO application module enables the setting of the IO application module by the customer engineering tool.

Electrical Asset Manager Configuration Engineering Tool (EcoStruxure ™ Power Commission)

The EcoStruxure Power Commission engineering tool is a software application that helps the user to manage a project as part of designing, testing, site commissioning, and maintenance of the project life cycle. It enables the user to prepare the settings of the devices offline (without connecting to the device) and configure them when connected with the devices. It also provides other value-added features for the user to manage the project such as: safe repository in cloud, attach artifacts to each device or at the project level, organize devices in switchboard, manage a hierarchical structure of the installation, etc.

The EcoStruxure Power Commission software is compatible with the following devices:

ComPact NSX100-630 (IEC) circuit breakers

PowerPact (UL) circuit breakers

ComPact NS630b-3200 (IEC) circuit breakers

MasterPact NT/NW (IEC and UL) circuit breakers

Compatible devices (Device Management in the project)

Switches (ComPact NSX, MasterPact & PowerPact Family)

Third party devices

References:

The EcoStruxure Power Commission software package can be downloaded from our website:

The EcoStruxure Power Commission Software includes the Schneider Electric customer engineering tools such as the Remote Setting Utility (RSU) and Remote Control Utility (RCU) with additional features.

The EcoStruxure Power Commission Software supports the connection of Schneider Electric communicable devices to:

create projects by device discovery, selection of devices, and importing a Bill of Material (BOM)

monitor the status of protection and IO status

read information (alarms, measurements, parameters)

check protection discrimination between two devices

upload and download of configuration or settings in batch mode to multiple devices.

carry out commands and tests

generate and print a device settings report and communication test report

manage multiple devices with a electrical and communication hierarchy model

manage artifacts (project documents)

check consistency in settings between devices on a communication network

compare configuration settings between PC and device (online)

download latest firmware

The EcoStruxure Power Commission Software enables the user to access the advanced features of the software once the project is saved in the Schneider Electric cloud.

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