CM1E Molded Case Circuit Breaker

Scope Of Application

CM1E low voltage Current adjustable circuit breaker  (hereinafter referred to as circuit breaker), the circuit breaker has small size, high breaking capacity, short arc, anti vibration. Its rated insulation voltage is 800V, suitable for the distribution network of AC 50Hz, rated voltage AC400V, rated current up to 1250A and below, used to distribute electrical energy and protect the circuit and power equipment from overload, short-circuit, undervoltage and other faults. It can also be used for the infrequent conversion of the line and the infrequent starting of the motor. The circuit breaker can be vertically installed, or horizontally installed. The low voltage circuit breaker has isolation function.

Main Features

CM1E adjustable electronic moulded case circuit breaker has three protection function, the circuit breaker with utilization category B connected with other short-circuit protection device in the same circuit has completely optional under short circuit circumstance; With five tripping features, the user can set the equipment through the shunt release according to the load current, electronic shunt release is powered by circuit breaker itself; current signal and control power is from the circle circuit transformer installed in the circuit breaker; With fire protection shunt release for alarming but not trip, when the load current is overloaded, the circuit breaker does not trip, and output the passive contact, driving the corresponding alarm device; The dimensions and specifications are the same as those of CM1 MCCB, the installation can be changed.

Note: in the setting, the dial switch must be set in place!

Note:

1. Adjust overload long delay action current Ir1, according to the different circuit breaker rated current, 4-10 files can be adjusted;

2. Adjust long delay action time t1, 4 files can be adjusted;

3. Adjust short-circuit short-delay action current Ir2, 9 files can be adjusted;

4. Adjust short delay action time t2, 4 files can be adjusted;

5. Adjust short-circuit instantaneous action current Ir3 action, 9 files can be adjusted;

6. Adjust pre-alarm action current Ir0, 7 files can be adjusted.

Main Technology Parameters

The setting range of intelligent controller is shown in the table

The main technical data of circuit breaker are shown in table

Characteristics of release

a. Characteristics of Electric Trip Unit

With overload long-delay inverse time, short-circuit short-delay inverse time, short-circuit short delay time limit, short-circuit instantaneous action and other protection features, the protection characteristics can be set up by the users.

b. Overload long delay inverse time protection action characteristics in Table 4.

c. Short-circuit short-delay protection action characteristics in Table 5.

d. Short-circuit instantaneous protection action characteristics in Table 6.