MCCB
Primary Injection Testing for low voltage circuit breakers
Primary injection testing in low voltage circuit breakers is a method used to test the functionality and performance of the circuit breaker under real-life conditions. This type of testing involves injecting a high current directly into the breaker’s ...
UL 489 or UL 1077 in Control Panels and Equipment – A Quick Guide
When to use UL 489 Branch Circuit Breakers and when to use UL 1077 Supplementary Protectors in Control Panels.
MCCB Modbus Communications
Certain LS MCCBs can be ordered with communications to allow interfacing with a modbus RS-485 network. Overview Wiring Terminals C1 (TRx+) and C2 (TRx-) is the communication bus connection points on the ETM type MCCBs. 22~26AWG twisted pair wiring is ...
ACB/MCCB Voltage Modules
For customers looking at the ACB and MCCB voltage modules they should know that despite the different names they are technically the same part. This applies to the total assembly compact voltage divide module.
Slash Ratings for Circuit Breakers
An Introduction to MCCB Insulation Barriers
Insulation barriers are a great accessory for your MCCB. There are a variety of choices available depending on your terminal type. Below is a brief description of each.
MCCB Insulation Barrier Part Numbers
We know how important insulation barriers are to your products so we have put them all in one location for your reference. Item Number: 83261175009 For Frame Size: UTE100 Item code: 83261172026 For Frame Sizes: UTS150-U250/TD100-TS250 Item code: ...
MCCB Altitude derate
Altitude Derating Altitude 6560 ft 2000m 9840 ft 3000m 13120 ft 4000m 16400 ft 5000m Max. operational voltage 100% 88% 78% 68% Average current at 40C 100% 96% 93% 90%
UTE100 2p flange handle use?
Yes, the COM units for UTE100 will work. Please refer to the parts below
ZSI connection guide for MCCB
MCCB in high frequencies (400hz) application
LS Electric MCCBs are suitable for use at 400hz. Due to higher frequency, the breakers are required to be derated as the increased resistance of the copper sections resulting from the skin effect produced by eddy currents at 400hz. This is an image ...
MCCB Factory Lugs
The UTE100 through UTS1200 frame circuit breakers can be ordered with mechanical line and load side lugs. The standard lugs can be removed for the installation of bus bar or "flexi-bar" connections. All lugs are UL/cUL Listed Certified for their ...
Converting lug-type MCCBs to bolt-on type
Lug type MCCBs can be converted to Bolt on type. This consists of removing the existing lugs and installing a terminal plate kit. The part numbers are below for the kits. Attached is a diagram showing how the conversion is done. Note that each kit is ...