Motor Protection Circuit Breaker (MPCB) is a combination protection unit comprising the functions of a switch, a short circuit protective device and an over load relay. They are designed for various current rating to suit different motor rating.
The GV2ME and GV2P circuit-breakers are compact circuit-breakers for currents up to 80 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. Circuit-breakers and contactors can be combined to form fuseless starter combinations.
In GV2ME series, energisation is controlled manually by operating the Start button “I”. De-energisation is controlled manually by operating the Stop button “O”, or automatically by the thermal-magnetic protection elements or by a voltage trip attachment.
In GV2P series, energisation is controlled manually by moving the knob or rocker lever to position “I”. De-energisation is controlled manually by moving the knob or rocker lever to position “O”. De-energisation due to a fault automatically places the knob or rocker lever in the “Trip” position. Re-energisation is possible only after having returned the knob or rocker lever to position “O”.
The standards to which the breakers have been constructed, permissible ambient temperatures, maximum making and breaking capacity, tripping currents and other limiting operational conditions, are given in the technical data and tripping characteristics
Application of MPCBs
a) Standalone Motor Protection
b) Enhanced system life
c) Plant protection
Please click on the individual link below to know about more about each of the Schneider MPCBs.
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