Masterpact Circuit Breaker Manual

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Masterpact circuit breaker manual.

The masterpact nw low voltage power circuit breaker1 and insulated case circuit breaker are designed to mount in a drawout cradle using rear mounted plug on pressure connections to provide electrical connection to the cradle. The masterpact nt and nw universal power circuit breakers offer a family of circuit protection products meeting the most common world standards ansi ul and iec. Common auxiliaries from 800 a to 6 300 a. Closing and opening operations can be initiated either from the local pushbuttons on the circuit breaker front face or by remote control.

Matching a masterpact circuit breaker with its chassis. Closing and opening operations can be initiated either from the local pushbuttons on the circuit breaker front face or by remote control. Resetting after a fault trip remotely. Masterpacttm circuit breaker is operated via a stored energy mechanism which can be manually or motor charged.

E51217a push the circuit breaker into the chassis taking care not to push on the control unit. Using masterpact the circuit breaker signals a fault trip by. Open the circuit breaker in any case it opens automatically during connection. Refer to the masterpact nt nw universal power circuit breaker catalog 0613ct0001 for product descriptions.

Masterpact nt and nw maintenance guide device and chassis mechanisms mechanical operation of the circuit breaker may be hindered by dust knocks aggressive atmospheres no greasing or excessive greasing. Before mounting the circuit breaker make sure it matches the chassis. Locally if the circuit breaker is not equipped with the automatic reset option reset it manually. Masterpact circuit breakers are operated via a stored energy mechanism for instantaneous opening and closing.

The mechanism is charged either manually or electrically. 0 c 0 cycle is possible without recharging. The mismatch protection ensures that a circuit breaker is installed only in a chassis with compatible characteristics. To set up a mismatch prevention combination for the circuit breaker and the chassis see the mismatch prevention installation manual.

For complete information on masterpact handling and mounting see the installation manual s. Tutorial for performing a manual charge of the closing spring within masterpact nw and masterpact nt circuit breakers by pumping the charging handle several. B a mechanical indicator on the front b one or two sde fault trip indication contacts sde2 is optional.