Motor Protection Circuit Breakers (MPCB) – Mehta Electric Corporation

Siemens – SIRIUS 3RV Motor Starter Protectors/Circuit Breakers up to 100 A

3RV1 motor starter protectors/circuit breakers with the accessories which can be mounted for the various sizes,

Size S00 – width 45 mm, max. rated current 12 A, at 400 V AC suitable for induction motors up to 5.5 kW.
Size S0 – width 45 mm, max. rated current 25 A, at 400 V AC suitable for induction motors up to 11 kW.
Size S2 – width 55 mm, max. rated current 50 A, at 400 V AC suitable for induction motors up to 22 kW.
Size S3 – width 70 mm, max. rated current 100 A, at 400 V AC suitable for induction motors up to 45 kW.

Benefits

For short-circuit protection
For motor protection (also with overload relay function)
For system protection
For short-circuit protection for starter combinations
For transformer protection
As main control and EMERGENCY-STOP switches
For fuse monitoring
For use in IT systems (IT networks)
For switching of DC currents
As voltage transformer circuit breakers
In areas subject to explosion hazard (ATEX)

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Siemens – 3VS Motor Protection Circuit Breaker

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The 3VS13, 3VS16 motor starter protectors are compact motor starter protectors for currents up to 52 A which operate according to the current limiting principle. The devices are used for switching and protecting motors or other loads. They are fitted with instantaneous overcurrent releases and inverse-time delayed overload relay. Motor starter protectors and contactors can be combined to form fuseless starter
combinations.

The 3VS13, 3VS16 motor starter protectors are suitable for use in any climate.

Motor Starter Protectors

For motor protection – 3VS13: 0.4~25 A – 3VS16: 6~52 A

The characteristic curves of these motor starter protectors are specially laid-out for the overload and short-circuit protection of motors.

The inverse-time delayed releases (“a releases”) are adjustable for setting the rated current of the motors to be protected. The instantaneous short-circuit releases (“n releases”) are fixed-set to 12 times the value so as to assure faultless starting of the motors.

Current Limiting is achieved in 3VS as follows

Motor Starter Protectors

Trip Free Mechanism The breakers have a trip-free mechanism. Even by holding the toggle, tripping operation can not be stopped or blocked once it is started. Thus ensure positive opening in the event of fault.
Positive ON/OFF indication through toggle switch
Compact and space saving