Frequently Asked Questions — Schneider Electric

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" landing-cards-prop="{"getGk":[{"Title":"How can I cable to the PNP and NPN type outputs for sensors / detectors, using the wiring diagram?","UrlName":"FA23633","LastModifiedDate":"03/07/2025","score":1.001015670342426,"firstpublisheddate":"28/09/2010","answer":"

PNP and NPN type outputs are available as 3-wire sensors with a DC voltage power supply (the voltage limits are dependent on the specific sensor):

PNP type: switching on the positive voltage load

NPN type: switching on the negative voltage load

These outputs are typical of photoelectric detectors, inductive proximity and other types of sensors.

For a detailed explanation of PNP vs NPN, see the following FAQ: FA142566

PNP output

The load (relay coil, contactor relay input, PLC input) must be connected between the "-" negative terminal and the midpoint.

The corresponding PLC input is Sink.

NPN output

The load must be connected between the "+" positive terminal and the midpoint.

The corresponding PLC input is Source.

$\"PNP$

Some sensors have two PNP and NPN outputs (4-wire sensors) which are wired according to the diagram below.

$\"PNP$

Note that we no longer sell sensors. Telemecanique Sensors, who were previously part of the Schneider Electric brand, were sold in 2023. You can go to their website - www.telemecaniquesensors.com - for more information, including contact details.

"},{"Title":"What are the differences between snap-action and slow-break contacts in limit switches?","UrlName":"FA22871","LastModifiedDate":"03/07/2025","score":0.9847114885297981,"firstpublisheddate":"20/12/2010","answer":"

Note we no longer sell limit switches so the information given below is for information purposes only. You may still be able to buy Telemecanique limit switches (and some 9007 etc. ex-Schneider Electric ranges) but you'd need to go to them directly. This is their website for contact details and product information: www.telemecaniquesensors.com

Snap action

The speed of travel of snap-action contacts is not related to the speed of operation of the actuator. The actuator pretensions an "overcentre spring" mechanism and it is the spring tension which operates the contact once a certain tension has been achieved. This results in a very fast and assured operation of the contacts as the spring mechanisms "flicks" (or "snaps") over the trigger point and latches the contacts on. A similar action takes place on the release, i.e. as the actuator is released the spring tension reduces but the contacts do not move until the tension has dropped below a certain level, when the spring mechanism will snap the contacts open again.

Slow Break

A "slow break contact" is one where the physical movement of the actuator is directly linked to the physical movement of the contact. This can give very precise positioning and synchronization of both make and break points but is susceptible to arcing and intermittent signalling at the crucial make/break position, where actuator movement is slow and/or erratic.

Main differences between Snap Action and Slow Break

The snap action contact mechanism inevitably creates a hysteresis effect, where the closing and opening of the switch have considerable overlap. Please see attached timing diagram example. This does not occur with slow break, as the movement of the contacts is directly linked to the movement of the switch / object.

Slow break have a higher minimum actuation speed, to overcome the effect of sustain arcing on the contacts. Note that for applications that cause the switch to open a little and then re-close repeatedly / rapidly, this can reduce electrical durability over time.

Both types commonly have positive opening N/C contacts (always check your switch to confirm), but snap action provide an assured signal at slower speeds, whereas slow break rely on the minimum actuation speed. This is why there is potential for intermittent signalling on slow break, if that minimum speed is not adhered to.

Slow break can often switch bigger loads and offer higher electrical reliability values compared to snap action but please check product tables / data to confirm this on a case-by-case basis.

Sequence of moving contacts

$\"Timing$
Timing Sequence for "Snap Action". Note overlap of switching positions for different directions of travel.

$\"Timing$

Timing sequence for "Slow Break". Note same position for make and break.

"},{"Title":"How does the \"Dead man's switch\" or \"Dead man's handle\" position work on a controller handle?","UrlName":"FA23925","LastModifiedDate":"27/11/2025","score":0.9668805485694631,"firstpublisheddate":"24/11/2010","answer":"

Please note that we no longer sell joysticks, so this FAQ is for information only.

Technological description

The handle grip comprises a fixed part (lower section) and a moving part (upper section).
Action on the upper part of the handle grip (pressing down) drives a sliding rod inside the control lever.
This rod actuates a moving retainer which causes a change in electrical state of the contact element on the lower part of the mechanism, regardless of the position of the control lever.

Operation

In normal operation, the operator must maintain pressure on the handle grip to operate the machine.
If the operator releases pressure (e.g. feels ill and passes out), even if they are still holding on to it, the electrical contact at the base will change state.

$\"Dead$

"},{"Title":"What is the difference between the REFLEX mode and the POLARISED REFLEX mode on photo-electric sensors?","UrlName":"FA28055","LastModifiedDate":"02/03/2026","score":0.9577375613359363,"firstpublisheddate":"22/12/2010","answer":"

Note that we no longer sell these devices, this FAQ is for information only.

Both systems comprise a transmitter and receiver (usually within a single-body sensor), and a reflector. The transmitter sends a beam which is bounced back by the reflector and detected by the receiver. An object passing through the beam blocks the reflection and triggers the sensing signal.

REFLEX mode sensors may not be suitable for detecting reflective objects, as a shiny target may bounce the beam back to the sensor in the same way as the reflector. The sensor may not be able to tell the difference between the target and reflector and will therefore fail to detect the object. For maximum effectiveness the targets should be opaque or near opaque and should not be highly reflective in nature. However, the advantage of reflex mode sensors is that they give relatively long sensing distances.

POLARISED REFLEX mode sensors have polarising filters over both the transmitter and receiving sensor. The filters are at 90 deg to each other which means that the receiver cannot see the transmitted beam as it will be blocked by the receiver filter. The reflector turns the polarised light waves through 90 deg so that the receiver can see them. Light bouncing off other objects is not rotated so it will not trigger the sensor. This means that the polarised reflex can be used to detect very reflective surfaces, even mirrors, polished metal and semi transparent materials. However, the sensing distance is shorter than REFLEX.

"},{"Title":"What is the difference between PNP and NPN when describing 3 wire connection of a sensor?","UrlName":"FA142566","LastModifiedDate":"03/07/2025","products":"","score":0.7355442718334844,"firstpublisheddate":"03/05/2012","answer":"

Most industrial proximity sensors (inductive, capacitive, ultrasonic and photo electric) are solid state.

The term solid state refers to the type of components used within the sensor. Solid state electronic components such as transistors are used to switch the output of the sensor upon detection of an object.

Two specific types of 3 wire sensors are available; PNP and NPN. The difference is a result of the internal circuit design and type of transistors used. Refer to attached document for simple explanation of the two.

A key point to observe is that PNP and NPN has nothing to do with whether the sensor is normally open (N/O) or normally closed (N/C), i.e. a PNP sensor may be either N/O or N/C as can an NPN be either N/O or N/C.

Please note that the subject of this FAQ is specifically related to wiring PNP/NPN outputs for sensors, not to give a detailed understanding of transistor technology. However, for ease of understanding please see attached a page extracted from our Practical Aspects book, showing (in brief) transistor terminology and circuit diagrams. Further learning material regarding PNP and NPN transistors can be found online from several sources.

Why two types?

The selection of a PNP sensor verses an NPN sensor is determined by the nature of the circuit the device is to be used in. When used in a traditional relay type control circuit, it is normally possible to use either the PNP or the NPN type of sensor as shown below. PNP sensors tend to be more commonly used.

Wiring

Traditional relay type control circuit;

$\"3$ $\"3$

Use with a programmable logic controller (PLC).

When selecting a sensor to be used with a PLC, it is very important that the sensor matches the type of PLC input card to be used.
Two types of input cards exist, those that 'sink' current (also known as positive logic) and those that 'source' current (also known as negative logic). It is worth mentioning, that whilst the terms sinking / sourcing and positive / negative logic are well known in some industries, they are not always commonly used terms. It is therefore important to identify the type of sensor to be used with the PLC card based on the PLC manufacturer's documentation and / or wiring diagrams.

Most common in Europe is the 'sinking' type of input, these will be used with the PNP sensor as shown below. Less common nowadays are input cards that 'source', these were popular in Asia and require the NPN type of sensor in order to operate correctly. Many modern PLC input cards can be configured and wired to be either 'sinking' or 'sourcing' although it will usually necessitate all inputs on a particular input card being configured the same.

NOTE the dotted line in the following diagram is optional and may or may not be required, depending on your hardware/setup. The key wires to take note of are solid red, black and blue wires.

$\"PNP$ $\"NPN$

"},{"Title":"What size overload do I use with a star delta starter ?","UrlName":"FA173001","LastModifiedDate":"03/09/2025","products":"Industrial Relays, Manual Starters / Protectors, IEC Starters, Motor Protection Circuit Breaker, Motor Management System","score":0.27995934716015713,"firstpublisheddate":"15/07/2013","answer":"

In the majority of cases, the overload of a star delta starter is fitted below the delta contactor with wiring connections to one side of each of the motor windings.
The other side of the windings are connected to the line contactor. This means the motor load is split between 2 contactors but the overload only sees the current carried by one.
It is not a 50/50 split but has to be calculated by a special formula which, simply put, means the overload and each of the delta and line contactors only “see” 0.58 x the motor current.
This configuration of the overload is described as “inside the delta loop”.

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The overload will be rated at 0.58 x Motor Full Load Current ( Inom ).

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Example: A typical 415V 11KW motor has a full load current rating of 21A. for overloads mounted “in the delta loop” the rating will be 21 x 0.58A = 12.18A

\n\n

Sometimes, usually, in Type 2 configuration installations, the overload (often in the form of a motor circuit breaker such as a GV2ME** or similar) will be
mounted upstream of the starter in the main supply cables.
In this case all the current drawn by the motor will pass through the overload so it needs to be rated at 100% of full load motor current, i.e. in above example, 21A.

\n\n

"},{"Title":"What are the differences between 220VAC, 230VAC and 240VAC Mains Supplies and what voltage equipment should I use?","UrlName":"FA144717","LastModifiedDate":"03/07/2025","products":"","score":0.24696588637389566,"firstpublisheddate":"22/05/2012","answer":"

For many years, mainland Western Europe has used a mains electricity supply rated at nominally 220VAC 50Hz while the UK used 240VAC 50Hz.

In 1994, the European Union state members decided to proceed with a voltage harmonisation at 230Vac. This meant that consumers could be sure that a product bought in the UK would work in another EU country, and vice-versa (when used with the correct plug adaptor).

Since it wasn't economically viable to replace all existing grid switchgear to comply with the new 230V voltage level, the approach taken was to increase the tolerance of the supply in such way that will cover both existing 220Vac and 240Vac.

Regarding the LV Grid hardware, nothing immediately changed with the voltage harmonisation.

The new European tolerance values (230Vac +10% -6%) were chosen to cover all the existing supply voltages so any supply that was compliant before will be compliant after. However, across the years, as new grid switchgear is installed, the 230Vac nominal voltage is becoming more and more common.

Regarding the end devices, before the harmonisation, the products were designed to 220Vac and 240Vac depending on where the item was going to be sold. After the harmonization, manufacturers started designing end devices according to new 230Vac nominal voltage, but you can still find 220Vac and 240Vac devices aimed for other markets other than European.

Regarding the selection of products to be used in the UK, ideally it should have a nominal voltage of 230Vac. Due the historical reasons stated above, the 240Vac devices can be used with confidence.

"},{"Title":"What are the differences between 380V AC, 400V AC and 415V AC mains supplies and what voltage equipment should I use?","UrlName":"FA163890","LastModifiedDate":"31/01/2025","products":"Training Service","score":0.23674714953303444,"firstpublisheddate":"19/11/2012","answer":"

For many years, mainland Western Europe has used a mains 3 phase electricity supply nominally rated at 380V AC 50Hz while the UK used 415V AC 50Hz.

Currently, all Western European 3 phase supplies are classified 400V AC. In reality, there is no 400V AC supply unless you create one locally. 400V AC was a “standard” created during European "harmonisation" to give a single voltage standard across Western Europe, including UK and Irish Republic.

Although the ideal would have been to have a single voltage there were too many political, financial and technical obstacles to reduce UK voltage to European levels or to increase European voltage to UK levels, so a new standard was created to cover both. This was achieved by changing the tolerances of previously existing supply standards. UK voltage to 415V AC +6% and -10% and European to 380V AC +10% and -6% (thereby creating a manageable overlap) and we would call these two combined 400V AC, despite the fact that nobody was intentionally generating at 400V AC!

Depending on the voltage sensitivity of the product and the variance from nominal of the actual supplied voltage, it may not be advisable to use a 380V AC specific device in the UK or a 415V AC specific device in Mainland Europe etc. For instance a 415V AC supply can rise to as high as 439.9V AC and still be within tolerance, but the maximum assured rated voltage for a 380V AC product is only 418V AC. A 380V AC supply can drop as low as 357.2V AC within tolerance but the minimum assured voltage for correct performance of a 415V AC product is 373.5V AC. It may work perfectly well either way but it could be, technically, outside the specification of the equipment with obvious implications. A 400V AC product must be compatible with all voltages across this range.

If a product is to be used in the UK a 415V AC rated device is ideal but either 415V AC or 400V AC products can be used with confidence.

If a product is to be used in mainland Europe or Irish Republic a 380V AC rated device is ideal, but either 380V AC or 400V AC products can be used with confidence.

"}],"getPv":[{"Title":"How do I remotely initiate a transfer to Emergency on a series 300 with Group G controller?","UrlName":"FAQ000102705","LastModifiedDate":"09/06/2025","products":"ASCO SERIES 300 Group G Power Transfer Switch","score":1.0364464692482915,"firstpublisheddate":"22/10/2020","answer":"You can send "remote transfer to emergency" signals via the External Feature 17 contacts.

External Feature 17 contacts are located on the Series 300 Group G controller. The terminals for the External Feature 17 are TB1-8 and TB1-9. Refer to the ATS wiring diagram.

Connect a Normally Closed set of contacts across the terminals. Opening the contact will cause the generator to start and run, and transfer to Emergency side once the ATS controller recognizes the Emergency source as an acceptable source.

Before opening the contacts, make sure to enable the Ext. Feature 17 in the ATS controller first.

$\"\"$

$\"\"$

Enable the External Feature 17 via the Group G controller. Make sure there is a CHECK mark on the box corresponding to Ext Feature 17 to ENABLE it. Refer to the Group G Controllers User Guide.

$\"\"$

If unsure, contact Technical Support at 1-800-800-ASCO or send an email to technicalsupport@ascopower.com

You may also watch the video related to this (please see below).

"},{"Title":"Video: How to recover the system on the HMIGTU Series?","UrlName":"FA242275","LastModifiedDate":"24/03/2026","products":"HMIG3U, HMIG5U22","score":1.0164009111617314,"firstpublisheddate":"01/04/2015","answer":"

Issue:

\n\n

Video: How to recover the system on the Harmony/Magelis HMIGTU Series?

\n\n

Product Line:

\n\n

Magelis HMIG5U, HMIG5U2, HMIG3U, HMIG3X, HMIG5U22

\n\n

Resolution:

\n\n

The goal of this resolution is to provide the system recovery resource that can be used to backup and recover the Harmony/Magelis HMIG3U, HMIG3X, HMIG5U, HMIG5U2, and HMIG5U22. All the HMIGTU (except HMIG2U) series have their firmware stored on a System CFast or System SD Card.

\n\n

1) Power off the HMIGTU.

\n\n

2) Remove the System CFast or System SD card from the HMIGTU (this SD card slot is labeled "SYSTEM CARD" on the outer casing of the HMI).

\n\n

3) Insert the CFast or System SD into a CFast (Type 1.0) or SD Card Reader on your office PC.

\n\n

4) Launch the Backup Recovery Tool (BackupRecovery.exe).

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5) In the "File Name" field, choose the recovery image file (.bin) for your type of HMIGTU.

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6) Select the Drive Letter from the dropdown list to match that of your CFCard or SD Card that you inserted.

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7) Click "Recovery" and then [Yes] when you are prompted to continue this process

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8) The .bin image will be written to the CFast or SD card. Please wait and do not remove the CFast or SD Card during this time.

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9) Once the process is done, a message will appear "Quit he application, and eject the disk from the PC."

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10) Eject the CFast or SD card from your PC

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11) Insert it back into the HMIGTU's system slot (the one close to the screen-mount side)

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12) Power on the HMIGTU as per normal.

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Attached are:

\n\n

Backup Recovery Tool - "BackupRecovery.exe"

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Backup Recovery User Manual - "Backup Recovery User Manual.pdf"

\n\n

Pre-made image for HMIG3U saved in Vijeo Designer 6.2 SP8 - "HMIG3U.bin"
Pre-made image for HMIG3X saved in Vijeo Designer 6.2 SP9 - "HMIG3X.bin"

\n\n

NOTE: HMIG5U, HMIG5U2, and HMIG5U22 images are too large to upload. Please contact support at customerservices@se.com to ask for a direct download ticket link.

\n\n

\n
"},{"Title":"How to configure Modbus RTU on ASCO 5210 Power Meter","UrlName":"FAQ000159593","LastModifiedDate":"09/06/2025","products":"ASCO 5210 Digital Power Meter","score":1.0113895216400912,"firstpublisheddate":"25/02/2021","answer":"RS-485 Port and DIP SW Settings

1. On J1, terminate twisted pair cable.
2. Set proper termination for S1 (Terminating resistor).
2.1 Terminating resistor should be ON if 5210 is the last device on the loop.
2.2 Otherwise, it should be OFF.
3. Choose 2-wire or 4-wire (S2).
3.1. For 2-wire, connect on any + or - terminals. Moving the DIP SW will internally connect the terminal. No need for external jumper.

$\"image.png\"$

Serial Communication Settings on ASCO 5210 Power Meter

4. On 5210 PM, go to Main Menu ➡ Settings ➡ Communication ➡ 485 Protocol..
5. Set protocol to Modbus.
6. Set appropriate baud rate and device address.
$\"image.png\"$

Please refer to the attached Power Meter Modus Register Map document (381339-307D ) for holding register addresses.

You may also refer to the related video below for further information:

"},{"Title":"How to fit a 250A Switch Disconnector to the Acti9 Isobar P Range of Distribution Boards?","UrlName":"FA355302","LastModifiedDate":"27/11/2025","products":"Acti 9 Isobar P - B type, SEA9PNI2504","score":1.0068337129840548,"firstpublisheddate":"07/08/2018","answer":"

Please see below instructional video on how to fit a 250A Switch Disconnector to the Acti9 Isobar P Range of Distribution Boards.

"},{"Title":"How to install a CT block onto the NSX breaker","UrlName":"FA333735","LastModifiedDate":"26/09/2025","products":"Compact NSX <630, Compact NSX switch disconnector","score":1.0068337129840548,"firstpublisheddate":"03/01/2018","answer":" Please see below video link

"},{"Title":"How do I fit a 29450 Auxiliary contact in a NSX breaker?","UrlName":"FA332398","LastModifiedDate":"22/09/2025","products":"Compact NSX DC & DC PV, Compact NSX <630, Compact NSX switch disconnector","score":1.0068337129840548,"firstpublisheddate":"22/11/2017","answer":"

Please see video below:

"},{"Title":"How do you fit a GV2AF3 to a TeSys D contactor with AD or DC coils?","UrlName":"FA360780","LastModifiedDate":"07/10/2024","products":"TeSys Deca Advanced, TeSys GV2, Linergy Device Feeders","score":1.0068337129840548,"firstpublisheddate":"22/01/2019","answer":"The GV2AF3 fits between the TeSys D contactor and the TeSys GV2 Motor Circuit Breaker (MCB). The Tesys D contactors have different coil dimensions making the DC coils taller than the AC coil versions, which can cause problems when mounting using GV2AF3.

This short video shows how to set up the GV2AF3 for DC and AC coils. It also shows how to mount the TeSys D to the GV2AF3 and to a TeSys GV2.

GV2AF3 can be used with any of the GV2 range (GV2ME, GV2P etc.)

"},{"Title":"How do you add an image or picture in EcoStruxure Operator Terminal Expert (former Vijeo XD)?","UrlName":"FA361392","LastModifiedDate":"02/02/2026","products":"EcoStruxure™ Operator Terminal Expert","score":1.0045558086560364,"firstpublisheddate":"26/10/2018","answer":"To add an image in to the project you have to drag in the "Image" icon from the Tool Chest and the allocate an image file in the properties for the icon.
Please watch the video below which shows the process (The video is done in Vijeo XD):

Note in Vijeo Designer the function is different, the addition of a picture is added in the using the "Image" function in the "Toolbar"

\n

We have the possibility to add images into the library object of EcoStruxure Operator Terminal Expert as i show in the next video:

\n\n

https://youtu.be/PzG_TUzpYRo

\n\n

This will allow to see the images in the project library BUT those images will not be linked to the project only to your PC, so if you share the project or open it in another laptop the images used in the project will not be seen. If you want to avoid that then you will need to add each image in to the project using the object for images.

\n\n

"},{"Title":"How is the Compact NSX toggle lock off device 29370 fitted on a breaker?","UrlName":"FA330255","LastModifiedDate":"18/11/2025","products":"Compact NSX <630, 29370","score":1.0045558086560364,"firstpublisheddate":"31/10/2017","answer":"Please see link below

"}],"getPa":[{"Title":"What does light or dark switching mean when referring to photo electric sensors?","UrlName":"FA143615","LastModifiedDate":"17/03/2025","score":1.0086378163600243,"firstpublisheddate":"03/05/2012","answer":"

Please note - As of 01/09/23 the Telemecanique Sensors range is no longer part of Schneider Electric. This FAQ is now for reference only. For further information and contact details for Telemecanique Sensors, please visit their website; https://www.telemecaniquesensors.com/global/en.

There are 3 main types of photo electric sensor used for detecting an object;

Diffuse (sometimes also called proximity mode or direct detection). There is also a variation of diffuse called diffuse with background suppression (diffuse with BGS).
Retro reflective (sometimes also called reflex). There is also a variation of reflex called polarised reflex (or polarised retro reflective).
Through beam (sometimes also called thru' beam).

Determining normally open (N/O) or normally closed (N/C) operation?

Both the retro reflective and through beam sensors rely on the object 'breaking' the beam in order for it to be detected. Whereas the diffuse system requires the object itself to reflect the light beam.
Because of this fundamental difference in the way the sensors detect an object, retro reflective and through beam sensor outputs are the inverse of diffuse sensors. This leads to a lot of confusion.

Historically

Within the photo electric industry, to overcome the confusion of referring to N/O or N/C outputs, the term 'light switching' and 'dark switching' was introduced;

Light switching;

A sensor that is light switching switches it's output 'on' when the light beam is returned to the receiver. i.e. If N/O operation is required, a light switching diffuse sensor could be used.

$\"Light$

Dark switching;

A sensor that is dark switching switches it's output 'on' when the light beam blocked from returning the beam to the receiver. i.e. If N/O operation is required, a dark switching retro reflective or through beam sensor could be used.

$\"Dark$

Recent developments

To simplify product selection, Schneider Electric (under the Telemecanique brand) pioneered the concept (launched as Osiconcept) of 'object detection' with it's Osiris multimode range of sensors. With these products, irrespective of whether the sensor is configured for retro reflective, through beam or diffuse the output will default to N/O. Another feature of these multimode sensors is the ability to invert the output to achieve a N/C mode of operation.

"},{"Title":"What is the meaning of the utilisation categories AC1 and AC3 for the Tesys contactors?","UrlName":"FA23926","LastModifiedDate":"05/02/2026","products":"TeSys Deca Advanced, TeSys Giga contactors, TeSys k","score":1.005024016885053,"firstpublisheddate":"20/10/2010","answer":"

The standard utilisation categories defines the current making and breaking values for contactors.
They depend on the following:

\n\n

The type of load to be controlled (squirrel cage or slip ring motor, resistors etc.)
The operating cycle conditions (motor running, stalled or starting, reverse operation, counter-current braking etc.)

\n \n\n

AC-1 category

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This applies to all AC devices (loads) with a power factor of at least 0.95 (cos phi greater than or equal to 0.95).
Examples of use: resistive load, heating, distribution

\n\n

AC-3 category

\n\n

This applies to squirrel cage motors where breaking occurs while the motor is running.
Examples of use: all squirrel cage motors, lifts, escalators, conveyors, bucket elevators, compressors, pumps, mixers, air conditioning units

\n\n

Note concerning contactor part numbers

\n\n

The most common application of contactors is controlling squirrel cage asynchronous motors.
Hence, Schneider Electric contactor part numbers are based on the AC-3 rating.

\n\n

For example, the LC1D18xx contactor is designed to control motors with a nominal current rating of 18 A (AC-3).
This contactor is capable of withstanding current peaks (~ 100 A) on starting, such as are typical on inductive machines like motors, without sustaining any damage.
It can also control resistance heaters for current ratings up to 32 A (AC-1). This load is resistive, hence there are no current peaks.

Utilization categories are defined in full in regulation IEC 60947-1

"},{"Title":"Can 80A or 100A miniature circuit breakers be fitted onto the outgoing ways of the Acti9 Isobar Distribution Boards?","UrlName":"FA36314","LastModifiedDate":"15/08/2025","products":"Acti 9 C120, P25M, C60 UL/CSA/IEC, Compact NG160, Acti 9 Isobar P - A Type, ID, Acti 9 NG125, Acti 9 NG125 L-MA, Acti 9 iC60, Mureva Enclosure, Acti 9 Isobar P - B type","score":1.00354150470761,"firstpublisheddate":"07/12/2010","answer":"

The Acti9 Isobar Distribution Boards outgoing ways are designed to be fitted with iC60H MCB's up to and including 63A.

MCB's rated at 80A and above are physically larger and do not fit the isobar busbar system.

However , there is a way around this:

By installing a SEA9BNEX034N below the board and fitting an 80A iC120H MCB in this enclosure you can then feed from the board (via an SEA9TB1001) terminal block in to the iC120H

For single pole MCB's use 1 x SEA9TB1001 for 3 pole MCB's use 3 x SEA9TB1001.

"},{"Title":"What is a Shunt Trip MX used for?","UrlName":"FA86359","LastModifiedDate":"07/11/2025","products":"A9A26476, LV429387","score":1.0029368575624082,"firstpublisheddate":"21/12/2010","answer":"

A Shunt Trip coil is used to remotely trip a circuit breaker and some switch disconnectors.

Schneider Electric uses the abbreviation MX or iMX for Shunt Trip coils.

A Shunt Trip coil has to have a voltage applied to it to trip the device.

An example of an application for a Shunt Trip would be for load shedding.
A second example would be for an EPO circuit with N/O EPO contacts wired in parallel.

"},{"Title":"Can the new Easy9 and Easy9+ MCB's and RCBO's fit the older Domae consumer unit?","UrlName":"FA222340","LastModifiedDate":"06/12/2024","products":"Easy9, Spacial 18500 stainless steel","score":1.0022458322536063,"firstpublisheddate":"20/02/2014","answer":"Yes, both the Easy9 and Easy9+ MCB's and RCBO's will fit the older Domae consumer unit and any of the older Domae range of consumer units.

Examples of Domea consumer units below;
DOM2CU
DOM4CU
DOM6CU
DOM8CU
DOM12CU
DOM16CU
DOM20CU"},{"Title":"What is the cabling diagram for the SR1CBL01 cable?","UrlName":"FA27937","LastModifiedDate":"02/02/2026","products":"Zelio Logic","score":1.0019003195992053,"firstpublisheddate":"03/02/2011","answer":"The SR1CBL01 is the programming cable to be use with the Zelio Relay SR1.

To be able to connect first generation Zelio programmable relays (part number SR 1xx) to a PC supporting the ZelioSoft programming software (part number SR1SFT01) you must have the SR1CBL01 programming cable.

The wiring diagram is as follows: Zelio connector end: brown: 2, yellow: 7, red: 3, orange: 5. PC SubD9 end: brown: 7, yellow: 2, red: 3, orange: 5.

$\"ImagePinOut\"$
Please Note: This cable and configuration is for the Zelio Logic First Generation - These items will not work with SR2 devices, Zelio Logic 2, or Zeliosoft2 Programing Software.

*********************************************************NOTE*******************************************************************
The Zelio SR1 software , devices and modules are discontinued. Please check the Zelio Smart Relay SR2 or SR3.
***********************************************************************************************************************************"},{"Title":"What is the pin-out of the cable XBTZ915?","UrlName":"FA22680","LastModifiedDate":"15/08/2025","products":"Vijeo Designer, Magelis XBT GT, Magelis XBT N, R, RT, EcoStruxure™ Operator Terminal Expert, Magelis GTU, Magelis GK, Magelis GTO","score":1.0019003195992053,"firstpublisheddate":"08/12/2010","answer":"

Below is the pin-out of cable XBTZ915
$\"Pin$

"},{"Title":"What size fuses can be fitted into YW6 fuse handles?","UrlName":"FA133429","LastModifiedDate":"21/11/2025","products":"NS Feeder Pillars","score":1.001813941435605,"firstpublisheddate":"01/03/2011","answer":"

YW6 Fuse handles accept 92mm centres 'J' type fuses to BS88 part 5 rating up to 630A.

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