Can a WL circuit breaker provide personal (5mA) or equipment (30mA) ground fault protection?
The minimum ground fault pick-up setting for WL circuit breakers is 100 amps for ground fault protection. When ground fault sensitivity in the range of 0.5mA or 30...
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Where can I find temperature de-rating tables for WL circuit breakers?
UL 489 (for low-voltage molded-case and insulated case circuit breakers) is silent regarding any form of de-rating for ambient environments greater than 40C. UL...
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Are WL circuit breakers rated 80% or 100%?
All models of WL circuit breakers are 100% rated for continuous operation when.... Applied in enclosures that meet or exceed the requirements described with the...
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3VA Auxiliary Switches and Trip/Bell Alarm Switches [ HP (High Power) versus HQ (High Quantity)]
All Auxiliary Switches and Trip/Bell Alarm Switches are form C: both NO (normally open) and NC (normally closed). They are available in two versions: High Quantity...
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How to Series Rate 3VA Breakers?
Most 3VA Series Ratings have been UL approved and are reflected in COMPAS. Further testing is underway, so additional updates and expanded ratings are forthcoming....
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Difference between Shunt Trip Left (STL) and Shunt Trip Flexible (STF)
Shunt Trip Left (STL) Shunt trips type STL can be installed in the left-hand accessory pocket. These units are available with six different voltage ratings in the...
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3VA Motor Operator
The motor operator MO320 accepts commands via electrical control cables to open and close the molded case circuit breaker. The source of commands transmitted via...
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SEM3 Networking Detail
SEM3 Networking Detail The following information is detailed networking information for the SEM3 Controller. Default SEM3 Controller networking settings IP Address ...
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Switchboard Seismic Ratings
This article provides information on Switchboard Seismic Ratings. Definitions: Ip = Importance Factor ...
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BoltShield Surge Protective Devices (BSPD) in P1
Introducing BoltShield™ Surge Protective Devices (BSPD) in P1.
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