Knowledge Base
LS Electric America
Knowledge Base
Popular Articles
3 pole MCCB on a single phase system
LS UL489 Molded Case Circuit Breakers (MCCB’s) are suitable for use in single phase systems. LS Susol UTE/UTS 3 pole MCCBs may be applied to single phase systems provided that the MCCB is sized appropriately per the given load. Furthermore, the MCCB ...What is the difference between differential and non-differential overloads?
For overloads, differential and non-differential types differ in how they trip (release). Differential is considered to be a higher sensitivity relay as it has phase failure detection. When a difference between two or more of the phases exceeds the ...What is the difference between LTB-32 and TB-32?
LTB-32 and TB-32 are both terminal block accessories for MMS-32AF's. The LTB-32 Item # 62671941111, can be used with a phase bus setup for connecting multiple MMSs to the same power source. LTB Type Phase Bus Setup The TB-32 cannot be used with a ...What is a mechanical latch (ML) option for contactors?
A mechanical latch allows a normally open (NO) contactor to remain closed without continuously energizing the coil. To open the contactor the mechanical latch is energized with a short pulse. See below reference on available voltages and various MC ...How do I order a reversing contactor?
A reversing contactor is simply two contactors interlocked. One contactor runs the motor in the forward direction while the other runs the motor in the reverse direction. The contactors are mechanically and sometimes electrically interlocked. ...
Recent Articles
MCCB UL Lug Compatibility & Specification Table (with Order Codes)
This article provides a summary of compatible lug terminals for LS Electric MCCB models, including wire size ranges, material types, available rated currents, torque specifications, and order codes. Please refer to the attached file below for ...ACB Resistance and Power dissipation
Can the ACB cradle terminals be reoriented vertical to horizontal unbolted and reattached by the customer?
Can the ACB cradle terminals be reoriented vertical to horizontal unbolted and reattached by the customer? Apart from models 3200E and 6000G, it is possible to reconfigure the bus direction on both the ACB and cradle. Please note, however, that ...CT Limits of ratio error
According to the IEEE C57.13 standard, a ratio error within ±3% at rated current is considered acceptable, which differs from the NETA testing standard of ±0.5%.Understanding ETM Trip Unit (Current and Power Ranges)
The ETM trip unit requires an external 24V DC control power supply to power the display and enable Modbus communication. Without this control power, neither the LCD nor the communications will function. With control power applied, the trip unit will ...