AIR CIRCUIT BREAKERS - Electrical and Electronics Division

APPLICATION O� MPCBs :
STAND-ALONE MOTOR PROTECTION
APPLICATIONS
Highly compact and technically superior MG1 and MG2 can be used for electrical control and protection solutions by
OEMs. They can be used for switching, control and protection of motor in machine with single motor and not requiring
remote switching. MPCBs can be used in machine incorporating multiple motors as incomers as well as for protection and
control of individual motor.
ENHANCED SYSTEM LI�E
In order to have a compact MCC, a fuseless motor protection solution can be offered using MG1 and MG2 MPCB in
conjunction with MN contactors.
A contactor in conjunction with an MPCB enhances system life, provides facility for remote switching of motor and gives
undervoltage protection with additional under voltage release.
PLANT PROTECTION
MG1 and MG2 can be used for plant protection. MG1 has a setting upto 25A & MG2 upto 63A for plant protection.
DC SWITCHING
The MPCBs Type MG1 & MG2 are also suitable for DC switching.
�USE MONITORING
Operation of fuse can be monitored with MG-�1 (Refer Sketch). When the fuse blows, the current flows through the breaker,
causing tripping.
Voltages available
AC : 24V to 690V 50/60 Hz
DC : 24V to 250V
�or DC voltage greater than 250V to 600V, the 3 conducting paths of the breaker must be connected in series.
Schematic Diagram for �use monitoring of AC System
11/2
11