" landing-cards-prop="{"getGk":[{"Title":"Can a customer call DPSG directly, for Drive and Softstart troubleshooting help?","UrlName":"FA89924","LastModifiedDate":"30/04/2026","score":1.0005365766410301,"firstpublisheddate":"11/07/2003","answer":"

Issue : 
Drives Product Support Group direct contact number.

Product Line :
Altivar Drives & Altistart Soft Starts

Cause :
How to contact the support group for drive and soft start.

Resolution : 
Yes.  Call our Toll Free number at 1-888-778-2733.
Select option 1 to enter an existing case number, or key in your 5-digit Premier Support Contract number. 

OR

Select option 2 for Technical Support Queue
And
Select option 4 for AC Drives and Softstarts

Email address is drive.products.support@se.com

Chat live via chat portal : Live Chat Support

Normal hours are 8am to 8pm EST, Monday to Friday.  Emergency support is available outside normal hours for a fee or available to customers with a Premier Support Contract.

\n

 

\n\n\n\n\n\n\n\n\n\n"},{"Title":"Does Schneider Electric offer vault handles for the NQ panelboards?","UrlName":"FA127695","LastModifiedDate":"18/06/2026","products":"NQ Panelboards","score":1.0001788588803433,"firstpublisheddate":"23/03/2009","answer":"Issue:
Vault handle availability for the NQ panelboards

Product Line:
Panelboards.

Environment:
Products sold and used in North America

Resolution:
No, this feature is not available for NQ , Nema 1, Panel boards"},{"Title":"What is the difference between Open and Close transition for Automatic Throwover Applications?","UrlName":"FAQ000271449","LastModifiedDate":"04/03/2026","products":"Masterclad, Power-Zone® 4 Low Voltage Switchgear with Masterpact® NW and NT Circuit Breakers, Power-Zone 4 Arc Resistant Low Voltage Switchgear, QED-6 Rear Connected Switchboards, QED-2 Power-Style Switchboard","score":1.0001788588803433,"firstpublisheddate":"02/09/2025","answer":"

Issue:

\n

Automatic Throwover.

\n

 

\n

Product Line:

\n

Switchgears and Switchboards.

\n

 

\n

Environment:

\n

Switchgears and Switchboards.

\n

 

\n

Cause:

\n

Define Open and Close Transitions.

\n

 

\n

Resolution:

\n

The Automatic Throwover System (ATS) operates when the primary source is shut down, transferring the load to the secondary source. In other words, the ATS disconnects the load from Source 1 and connects it to Source 2, which can be a secondary utility or an emergency generator, ensuring a steady power supply.

\n

In a closed transition, there is a brief period when both sources are connected to the load simultaneously, operating in a parallel system. In contrast, during an open transition, both sources cannot be connected at the same time.

\n

Switchgears and switchboards usually have ATS functionality, which can be controlled by a Programmable Logic Controller (PLC) or Protection Relays.

"},{"Title":"Choosing the Right Level of Protection (SPD)","UrlName":"FAQ000265132","LastModifiedDate":"02/03/2026","score":1.0001788588803433,"firstpublisheddate":"07/01/2026","answer":"

Issue:

\n\n

How to choose the correct SPD?

\n\n

 

\n\n

Product Line:

\n\n

Surge Protection Devices

\n\n

 

\n\n

Answer:

\n\n

Choosing the appropriate Surge Rating for an SPD comes down to two things:

\n\n

1) The location of the SPD within the electrical distribution, and;

\n\n

2) The location of the facility (environmental surroundings)

\n\n

 

\n\n

Schneider Electric recommends the following surge current ratings based on SPD location within the electrical distribution.

\n\n

 

\n\n

Service Entrance Locations 240 kA

\n\n

Distribution Locations 120-160 kA

\n\n

Branch Locations 50-120 kA

\n\n

 

\n\n

 

\n\n

See attached bulletin for reference.

\n\n

 

\n\n

 

"},{"Title":"PACTware® - How to update device catalog","UrlName":"FAQ000272656","LastModifiedDate":"09/12/2025","score":1.0001788588803433,"firstpublisheddate":"13/02/2025","answer":"

There are three ways to access the device Catalog in PACTware®:

\n

 

\n

1. By clicking on the Device Catalog icon:

\n

\n

 

\n

2. By going to the View menu and clicking on "Device catalog":

\n

\n

 

\n

3. By pressing F3 on your keypad.

\n

 

\n

While using any of the methods explained above open the Device Catalog, which will be shown on the right of your PACTware® screen. Click on the Update device catalog button. A message will pop up asking if you want to Create new PACTware® device catalog. Say YES by pressing the Yes button:

\n

 

\n

\n

 

\n

A new message like the one below will be displayed. WAIT until the process is finished.

\n

 

\n

\n

 

\n

Once the process is completed the pop-up window will automatically disappear, and the Device catalog database will be now be updated.

\n

 

\n

NOTE:

\n

If the DTM you are looking for does not appear in the Device Catalog after updating the database, it may indicate that the DTM for your instrument type has not been installed on your computer.  If that is the case,

\n

- Download the DTM installer from se.com and unzip it to a local folder in your computer. 
- Close PACTware (PACTware cannot be running while installing your DTM)
- Run the installer as an Admin (right click on the file and click on "run as administrator").

Once the DTM is installed, open PACTware and update the Database library with the steps explained in this knowledge article.

\n

 

\n

Questions: Help is available at FieldDevices-Support@se.com

\n

 

"},{"Title":"What is the maximum frame breaker that can be installed on a I-line QED2 section?","UrlName":"FAQ000277778","LastModifiedDate":"21/11/2025","products":"QED-2 Power-Style Switchboard, Square D OEM QED2 Switchboards","score":1.0001788588803433,"firstpublisheddate":"20/11/2025","answer":"

Issue:
 The maximum frame breaker that can be installed on an I-line QED2 section

Product Line:
QED2 Swithboards 

Resolution: 

\n

Max 1200A Breaker R Frame/ P Frame 

\n

 

\n

"},{"Title":"What does the term \"NEMA Type 1A\" refer to?","UrlName":"FA108545","LastModifiedDate":"19/11/2024","score":0.9893087104274727,"firstpublisheddate":"23/03/2004","answer":"NEMA Standards Publication 250-1997, "Enclosures for Electrical Equipment (1000 Volts Maximum)" no longer lists this enclosure type. This enclosure type is commonly accepted to be referring to a NEMA 1 enclosure with a gasketed cover."},{"Title":"Insulation Resistance Testing and Humidity","UrlName":"FA354645","LastModifiedDate":"06/12/2023","score":0.9663501406481196,"firstpublisheddate":"11/07/2018","answer":"Issue:
How does humidity affect insulation resistance testing results?

Product Line:
Circuit Breakers

Environment:
Molded case and insulated case breakers

Resolution:
High humidity can drastically reduce insulation resistance testing results for circuit breakers.

Some equipment acceptance testing documents suggest values above 100 mega ohms and normally that is okay however high humidity can drastically reduce the results of the insulation resistance values.  Below is a sample of how higher humidity can reduce the IR values, making the 100 mega ohms acceptance testing values invalid.
40% humidity:  breaker IR value above 500 mega ohms, typical 1 G ohm*
75% humidity:  breaker IR value around 10 mega ohms*
95% humidity:  breaker IR value around 4 mega ohms*

*All values above are functional and conforming. Values derived from test data on Powerpact H frame breakers in a Schneider Electric laboratory.

The IEC 60947 standard, section 6.1.3.1 states that IR testing should be done below 50% humidity and states a 1 M ohm minimum IR value for a new breaker.

NEMA AB-4 recommends IR values for breakers, less than one mega ohm (1,000,000 ohm) should be investigated.  The Schneider Electric field testing and maintenance guide also states the same one mega ohm value, as written below.

Severe environmental conditions can reduce the dielectric strength of
molded case circuit breakers. Check insulation resistance during electrical
system testing.
To check the insulation resistance, perform the following steps:
1. De-energize and isolate the circuit breaker.
2. Clean the circuit breaker as described earlier.
3. Using a megohmmeter with a capacity of 500–1000 Vdc, apply voltage
from:
a. Each phase-to-ground with the circuit breaker on (circuit breaker
contacts closed).
b. Phase-to-phase with the circuit breaker on (circuit breaker contacts
closed).
c. Between each line and load terminal with the circuit breaker off
(circuit breaker contacts open).
4. Record resistance values. Resistance values of less than one mega ohm
(1,000,000 ohm) should be investigated.
 "}],"getPv":[{"Title":"Video: How do I program an ATV320 to use the dial of drive as speed and Digital Input 1 (DI1) terminal as start and stop control?","UrlName":"FA308988","LastModifiedDate":"07/10/2024","products":"Altivar 320","score":1.0028263692613246,"firstpublisheddate":"15/02/2017","answer":"Issue:
ATV320 to use the dial of drive as speed reference and Digital Input 1 (DI1) terminal as start/stop control

Product Line:
Altivar 320, ATV320

Environment:
All

Cause:
Programming setup

Resolution:



From Main Menu, press enter.
Scroll down to CONF and press enter.
Scroll down to FULL and press enter.
Scroll down to CTL and press enter.
Under CTL, set CHCF to SEP.
Set FR1 to A1U1.
Set CD1 to TER.

From the normal status display, press enter twice to then adjust the speed reference value as a % of the LSP-HSP range."},{"Title":"Video: How do you install a QOB3110VH, QOB3125VH, QOB3150VH breaker into a NQOD, or NQ Panelboard ?","UrlName":"FA240168","LastModifiedDate":"02/03/2026","products":"QO(B) Circuit Breakers, NQ Panelboards","score":1.0013749904514553,"firstpublisheddate":"10/02/2015","answer":"\n"},{"Title":"Video: How is automatic restart configured on the ATV21 / ATV212 drive?","UrlName":"FA176961","LastModifiedDate":"01/05/2026","products":"Altivar 212","score":1.001222213734627,"firstpublisheddate":"12/12/2013","answer":"Issue:
Video: Automatic restart on the ATV21 / ATV212 drives

Product Line:
ATV21 and ATV212

Environment:
All serial numbers for ATV21 and ATV212

Cause:
Certain faults can be automatically reset after the cause has cleared.  The drive will then restart the motor.

Resolution: 
Set F303 to any value, from 1 to 10, indicating the number of attempts to clear the detected fault. 
By factory default F303 is set to 0. A value of 0 disables the feature.
If the fault clears, the drive will restart the motor if the run command is active.
If the fault does not clear after all attempts are made, the drive will require a manual reset.

The first clear is attempted 1 second after the detected fault occurs.  Each subsequent clear attempt adds 1 second to the time interval between attempts.

 




See the ATV212 Programming Manual, page 135 for further details."},{"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":1.001222213734627,"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 simulate an analog input with Unity","UrlName":"FA334698","LastModifiedDate":"12/02/2026","products":"Modicon Quantum, Modicon M580, Modicon M340","score":1.0011458253762127,"firstpublisheddate":"24/05/2018","answer":"

Unity Pro offers the Write _Input_Int block which can be used to accomplish either task. The video linked to this FAQ will demonstrate this functionality using an M340. The information is also valid for M580 and Quantum PLC's.

 

\n"},{"Title":"Video: Configuring I/O Scanning on Modicon M580 in Unity Pro","UrlName":"FA277050","LastModifiedDate":"15/11/2022","products":"Modicon X80, Modicon M580","score":1.0010694370177984,"firstpublisheddate":"06/01/2016","answer":"The following video demonstrates the setup of I/O Scanning on the M580 platform in Unity Pro.

 "},{"Title":"Video: How do you upgrade the firmware on a M580 processor with Unity Loader?","UrlName":"FA359917","LastModifiedDate":"15/11/2022","products":"Modicon M580, EcoStruxure™ Control Expert","score":1.0009930486593843,"firstpublisheddate":"14/11/2018","answer":"Issue
Upgrading Firmware on Modicon M580 CPU

Product Line
Modicon M580 ePAC

Environment
M580/Unity Loader

Resolution



You can update the CPU firmware by downloading a new firmware version with Unity Loader.
Download the firmware through a connection to one of these:\n

• CPU mini-B USB connector 
• CPU Service port 
• Ethernet network

\n
The firmware file is a *.ldx file.
\n
1. Install Unity Loader software.
2. Connect the PC that is running Unity Loader to the CPU.
3. Launch Unity Loader.
4. Click Firmware tab.
5. In the PC list box, select the .ldx file that contains the firmware file.
6. When connected with Ethernet, check that the MAC address indicated in the PLC box corresponds to the MAC address marked on the CPU.
7. Check that transfer sign is green to allow transfer from PC to CPU.
8. Click Transfer.
9. Click Close."},{"Title":"How can we make a numeric display with an expression also have input in Vijeo Designer?","UrlName":"FA373652","LastModifiedDate":"03/04/2025","products":"Vijeo Designer","score":1.00091666030097,"firstpublisheddate":"18/04/2019","answer":"

Issue:
Numeric display with an expression also have input

Product Line:
Vijeo Designer

Resolution:
In Vijeo Designer, a numeric display with an expression cannot have input activated. In order to achieve this, you will need to make your own custom object using the following:
1) A numeric display with the expression.
2) An invisible switch.
3) A numeric display with input activated.

This example assumes that the numeric display with the expression only involves one tag.

The idea behind this setup is that we will use visibility animation to show and hide the appropriate numeric display. In a normal mode, we will display the numeric display with the expression. The visibility condition for this numeric display should be assigned to a boolean call "Hide_Display" for example. The expression for the Visibility condition should be "!Hide_Display."

Next, the invisible switch will be used to set to the boolean. Therefore the operation is the Bit Set operation on the boolean "Hide_Display". In addition, the visibility condition is also set to "!Hide_Display".

Finally, the numeric display with the input activated should have Visibility set to "Hide_Display" so that when the boolean is High, it is displayed while the other is hidden. In the Advanced tab of the numeric display, we should also set the "Use Input Trigger" and "Input Status Variable" to "Hide_Display". The status mode should be set to "ON/OFF Reverse Mode". These settings will allow the boolean to be reset after an number is entered.

Please see the attached example for a demo.


 

\n"},{"Title":"Video: Does the ATV312 drive come with a remote keypad?","UrlName":"FA234997","LastModifiedDate":"11/12/2024","products":"Altivar 312","score":1.00091666030097,"firstpublisheddate":"19/02/2016","answer":"

Issue:
Is a remote keypad come with the ATV312 drive as standard?

\n\n

Product Line:
ATV312

\n\n

Environment:
All models and serial numbers

\n\n

Cause:
None

\n\n

Resolution:
The ATV312 drive does not come with a remote keypad as a standard item.  It must be ordered separately. 
Remote Keypad Display
(IP54) ATV312, ATV12 VW3A1006
(IP65) ATV312, ATV12 VW3A1007
Mounting Kit, VW3A31101
Graphic Display  (used also with ATV61 and ATV71)  VW3A1101

\n"}],"getPa":[{"Title":"What is the maximum ambient temperature that a transformer can be installed in?","UrlName":"FA120978","LastModifiedDate":"15/12/2025","products":"Low Voltage Transformers","score":1.0010663146135879,"firstpublisheddate":"21/11/2007","answer":"

Issue:
Ventilation and cooling is an important issue in the installation and operation of transformers

Product Line:
LV Transformers

Environment:
Applies to all Low Voltage (LV) Transformers by SquareD/Schneider Electric

Cause:
Excessive heat is destructive to transformers

Resolution:
The average ambient temperature for a transformer over a 24 hour period should not exceed 30 degrees Celsius. For instance, if the transformer ambient temperature was 40 deg. C for 12 hours, then the transformer must not exceed 20 deg. C for the remaining 12 hours to average a 30 deg. ambient temperature.

If the average ambient temperature exceeds 30 degrees Celsius, the derating factor is 0.4% reduction of VA for every degree Celsius above 30 degrees Celsius per IEEE C57 12.96. The IEEE formula that is used to derive the 0.4% factor is valid only up to an AVERAGE of 50 degrees Celsius. Also, using transformers above their listed ambient temperature can shorten the life of the transformer. Due to the number of other factors involved, such as loading, frequency of use, and humidity, no data exists on how high ambient temperatures affect the life of a transformer.


 

"},{"Title":"Can a 3-phase QO load center be used on a 240 V \"high leg\" system?","UrlName":"FA123686","LastModifiedDate":"26/07/2022","products":"QO(B) Circuit Breakers, QO Standard Load Centers","score":1.0009901492840458,"firstpublisheddate":"23/02/2010","answer":"Issue:
Application

Product Line:
QO Load Center

Resolution:
Yes, but it is important to understand some limitations. This "high leg" delta system referred to is actually a 3 phase, 4 wire, 240/120 V delta system. It has a number of common names, including high leg, wild leg, stinger leg, etc. This system provides 240 V phase-phase power between all 3 phases, plus 120 V phase-neutral power on 2 of the 3 phases. The problem, however, is with the phase-neutral on the 3rd phase: it measures 208 V, which is not a usable downstream voltage since it is too high. This is what gives the system its nickname, high leg. This high leg is commonly the B phase, but could be the A or C phase.
Selecting QO breakers for this system must be done carefully. Here are some guidelines:

1-pole QO Breakers\n

• Standard 1-pole QO breakers have a voltage rating of either 120/240 V (e.g., QO120) or just 120 V (e.g. QO120GFI). These should only be applied on phases measuring 120 V phase to neutral, never on the phase measuring 208 V phase to neutral.

\n
2-pole QO Breakers\n\n

• Standard 2-pole QO breakers have a voltage rating of 120/240V (e.g., QO240). These should only be applied on phases measuring 120 V phase to neutral, never on the phase measuring 208 V phase to neutral.
• Special 2-pole QO breakers with "H" suffix have a voltage rating of 240 V (e.g., QO240H). These may be applied on any of the phases, including the high leg phase.

\n
3-pole QO Breakers\n\n

• Standard 3-pole QO breakers have a voltage rating of 240 V (e.g., QO330). These may be applied on any of the phases, including the high leg phase.

\n
NOTE: The installer should be careful to follow NEC and/or local electrical codes regarding the wiring, marking, and usage of this system."},{"Title":"Is a Line Contactor ahead of the soft start required as referred to in the ATS22 users manual?","UrlName":"FA222188","LastModifiedDate":"16/06/2025","products":"Altistart 22","score":1.0006600995226973,"firstpublisheddate":"18/02/2014","answer":"

Issue:
Is a Line contactor required ahead of the soft start?

Product Line:
Altistart 22, ATS22

Environment:
All models and serial numbers

Cause:
None

Resolution:
The purpose of the line contactor is to provide a means of removing AC line voltage from the softstart.  Due to leakage currents through the solid state switches, hazardous voltages can be present on the load side of the softstarter when power is applied to the line side of the softstarter. 
Also, the line contactor can be controlled to open if the ATS22 faults.  Some faults are the result of SCRs shorting.  If multiple SCRs fail in a shorted condition, full voltage power passes through and will either single phase or continue to run the motor.  The KM1 would interrupt  the power circuit.

A line or isolation contactor such as KM1 shown in wiring diagrams, located in the Annex of the ATS22 Users Manual (BBV51330) is strongly suggested but not required.

"},{"Title":"Is the use of Noalox antioxidant, for termination to Panelboards, prohibited?","UrlName":"FA270790","LastModifiedDate":"02/03/2026","score":1.0005966284147456,"firstpublisheddate":"15/09/2015","answer":"Issue:
Can a Noalox antioxidant, for termination to Panelboards, prohibited?

Product Line:
NQ/ NF/ I Line/ QMB

Environment:
Installation

Cause:
Restrictions

Resolution:
The use of an antioxidant , such as Noalox, on Panelboard Main Lugs is not required.
The lugs are UL listed for use with copper or aluminum conductors without the use of ANY anti-oxidation supplement.  The use of an antioxidant is not prohibited, but assurances must be made that the brand used, is a  NON PETROLEUM  based product.  If a petroleum based product is used and comes in contact with the insulating base, the insulating base material can be degraded.  
 "},{"Title":"Can the branch neutral bars be cut or disconnected in a QO or Homeline load center to form one neutral on one side and one ground bar on the other side?","UrlName":"FA123020","LastModifiedDate":"13/09/2022","products":"QO Standard Load Centers, Homeline Standard Load Centers","score":1.000571239971565,"firstpublisheddate":"18/12/2007","answer":"Issue:
Application

Product Line:
QO and Homeline Load Center

Resolution:
No, The neutral system in the QO and Homeline load centers are considered a split branch neutral system. Half of the branch neutrals are on the left and half on the right, with both branch neutral bars connected to the main neutral bar at the top of the interior. So it is not acceptable to modify the neutral bar from the way it was designed, tested, and manufactured. The neutral bar was not designed to have the left side separated from the right side. 

Whether or not the neutral bar can be used to terminate equipment ground wires is dependent upon the application of the load center. The neutral bar is rated to accept neutral conductors and ground conductor (in unused neutral spaces) ONLY if the load center is used as service entrance equipment. If the load center is NOT a service entrance load center (installed as a subpanel downstream from the service entrance equipment), then a separate ground bar needs to be purchased and installed for ALL ground conductors. Do NOT cut or separate the existing neutral bar to form a separate neutral and ground bar. This modification is not allowed per UL procedures and would VOID the UL listing and warranty."},{"Title":"Does the branch wiring of a hospital isolated power system require color coding?","UrlName":"FA176523","LastModifiedDate":"21/04/2026","score":1.0005458515283843,"firstpublisheddate":"01/12/2013","answer":"Issue:
Color coding required for the branch wiring of a hospital isolated power system

Product Line:
Hospital isolated power systems

Environment:
NFPA99, NEC517.160

Resolution:
The NEC requires color coding of the conductors based on the NEC edition in effect as referenced below:                                                    

NFPA 70 (2011 & 2008)
517.160 Isolated Power Systems                                                               
(A) Installations.                                                                     
(5) Conductor Identification.
The isolated circuit conductors shall be identified as follows:
(1)Isolated Conductor No. 1 — Orange with at least one distinctive colored stripe other than white, green, or gray along the entire length of the conductor
(2)Isolated Conductor No. 2 — Brown with at least one distinctive colored stripe other than white, green, or gray along the entire length of the conductor
NFPA 70 (2005)
517.160 Isolated Power Systems                                                               
(A) Installations.                                                                     
(5) Conductor Identification.
The isolated circuit conductors shall be identified as follows:
(1)Isolated Conductor No. 1 — Orange
(2)Isolated Conductor No. 2 — Brown"},{"Title":"What is the difference between XB4/XB5 and ZB4/ZB5?","UrlName":"FA127638","LastModifiedDate":"05/09/2025","products":"Harmony XB4 - ATEX D, Harmony XB5S, Harmony XB5R, Harmony XB5, Harmony XB4","score":1.0005458515283843,"firstpublisheddate":"14/04/2009","answer":"Issue:
\nHow are complete devices and parts indicated in the 22mm lines?
\n
\nProduct Line:
\nPush Buttons and Operator Interface

\nEnvironment:
\nHarmony Pushbuttons
\n
\nCause:
\nProduct Features
\n
\nResolution:
\nXB indicates a complete device and ZB is components.
While the 4 indicates the metallic line, and the 5 indicates the plastic line. 

An XB4 part number will be a complete metallic 22 mm operator. 
A ZB4 part number is a metallic component. 

An XB5 part number will be a complete plastic 22 mm operator. 
A ZB5 part number is a plastic component. "},{"Title":"Can the LR2D or LRD overload relay with single phase sensitivity and a D-Line contactor be used on single phase applications?","UrlName":"FA117906","LastModifiedDate":"28/09/2021","products":"TeSys Deca overload relays, TeSys Deca Advanced","score":1.0005204630852036,"firstpublisheddate":"14/09/2006","answer":"Issue: 
Need to use a three phase overload relay in single phase application.

Product Line:
Tesys D line overload relays

Environment:
Products sold and used in the United States
 
Cause:
Using a single phase sensitive overload in a single phase application
 
Resolution:
Yes, it is possible to use the OLR`s with single phase sensitivity on single phase motors if wired correctly. The recommended connection is to bring line side connections to terminals L1 & L3 on the contactor, jumper T1 on the overload to L2 on the contactor, and run load side connections off T2 and T3 of the overload. You must ensure current passes through all three phases or else the OLR will trip on a phase imbalance.

 "}]}" translations="{"tabs":{"popularArticles":"Popular Articles","popularVideos":"Popular Videos","generalKnowledge":"General Knowledge","sections":{"popularVideosTitle":"Popular Video FAQs","popularVideosTitleMobile":"Popular Videos","generalKnowledgeTitle":"Learn more through our General Knowledge FAQs","generalKnowledgeTitleMobile":"General Knowledge"}},"searchDocument":{"category":"Product category","publishedDate":"Published on","modifiedDate":"Last Modified on"},"moreButton":{"labelMore":"Show more","labelLess":"Show less"},"Redirection":{"message":"The FAQ you are looking for no longer exists. Use the FAQ search bar above to try another query."}}" env="new" s-id="229090">

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Product category:QO Standard Load Centers, Homeline Standard Load Centers

Does the branch wiring of a hospital isolated power system require color...

Issue: Color coding required for the branch wiring of a hospital isolated power system Product Line: Hospital isolated power systems Environment: NFPA99, NEC517.160 Resolution: The NEC requires color...

Published on:2013-12-01Last Modified on:2026-04-21

What is the difference between XB4/XB5 and ZB4/ZB5?

Issue: How are complete devices and parts indicated in the 22mm lines? Product Line: Push Buttons and Operator Interface Environment : Harmony Pushbuttons Cause : Product Features Resolution : XB...

Published on:2009-04-14Last Modified on:2025-09-05

Product category:Harmony XB4 - ATEX D, Harmony XB5S, Harmony XB5R, Harmony XB5, Harmony XB4

Can the LR2D or LRD overload relay with single phase sensitivity and a...

Issue: Need to use a three phase overload relay in single phase application. Product Line: Tesys D line overload relays Environment: Products sold and used in the United States Cause: Using a single...

Published on:2006-09-14Last Modified on:2021-09-28

Product category:TeSys Deca overload relays, TeSys Deca Advanced

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Learn more through our General Knowledge FAQsGeneral Knowledge

Can a customer call DPSG directly, for Drive and Softstart troubleshooting...

Issue : Drives Product Support Group direct contact number. Product Line : Altivar Drives & Altistart Soft Starts Cause : How to contact the support group for drive and soft start. Resolution :...

Published on:2003-07-11Last Modified on:2026-04-30

Does Schneider Electric offer vault handles for the NQ panelboards?

Issue: Vault handle availability for the NQ panelboards Product Line: Panelboards. Environment: Products sold and used in North America Resolution : No, this feature is not available for NQ , Nema 1,...

Published on:2009-03-23Last Modified on:2026-06-18

Product category:NQ Panelboards

What is the difference between Open and Close transition for Automatic...

Issue: Automatic Throwover. Product Line: Switchgears and Switchboards. Environment: Switchgears and Switchboards. Cause: Define Open and Close Transitions. Resolution: The Automatic Throwover System...

Published on:2025-09-02Last Modified on:2026-03-04

Product category:Masterclad, Power-Zone® 4 Low Voltage Switchgear with Masterpact® NW and NT...

Choosing the Right Level of Protection (SPD)

Issue: How to choose the correct SPD? Product Line: Surge Protection Devices Answer: Choosing the appropriate Surge Rating for an SPD comes down to two things: 1) The location of the SPD within the...

Published on:2026-01-07Last Modified on:2026-03-02

PACTware® - How to update device catalog

There are three ways to access the device Catalog in PACTware®: 1. By clicking on the Device Catalog icon: 2. By going to the View menu and clicking on "Device catalog": 3. By pressing F3...

Published on:2025-02-13Last Modified on:2025-12-09

What is the maximum frame breaker that can be installed on a I-line QED2...

Issue: The maximum frame breaker that can be installed on an I-line QED2 section Product Line: QED2 Swithboards Resolution: Max 1200A Breaker R Frame/ P Frame

Published on:2025-11-20Last Modified on:2025-11-21

Product category:QED-2 Power-Style Switchboard, Square D OEM QED2 Switchboards

What does the term "NEMA Type 1A" refer to?

NEMA Standards Publication 250-1997, "Enclosures for Electrical Equipment (1000 Volts Maximum)" no longer lists this enclosure type. This enclosure type is commonly accepted to be referring...

Published on:2004-03-23Last Modified on:2024-11-19

Insulation Resistance Testing and Humidity

Issue: How does humidity affect insulation resistance testing results? Product Line: Circuit Breakers Environment: Molded case and insulated case breakers Resolution: High humidity can drastically...

Published on:2018-07-11Last Modified on:2023-12-06

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