24V DC Compatibility for VCB Motor, Closing, and UV Coil

24V DC Compatibility for VCB Motor, Closing, and UV Coil

This article addresses a frequently asked question regarding the use of 24V DC control voltage for motor operation, closing coil, and undervoltage (UV) coil in LS Electric VCB systems. A technical review has been completed based on the control voltage specification chart and internal engineering confirmation.

As per the provided specification table (see image below), the Motor and Closing Coil section for 24V DC is marked as unavailable (-), while only Trip Coil shows a valid range (24–28V DC). This raised the following questions:

  1. Are the motor, close coil, and UV coil operable with 24V DC?

  2. If not, do we need to supply 48V DC separately using an external power supply?


--> Motor, close coil, and UV coil are all compatible with 24V DC ,and it is possible to order them with a 24V DC specification as well.


Notes

  • The - symbol in the Motor/Closing column for 24V DC may reflect default configuration limitations, not absolute compatibility.

  • If 24V DC operation is needed, be sure to specify this when ordering the VCB and associated accessories.