Auxiliary contacts

The contact with the mechanical circuit of the main circuit of the circuit breaker is mainly used for the display of the circuit breaker's split and closed state. It is connected to the control circuit of the circuit breaker through the circuit breaker. The appliance is controlled or interlocked. For example, a signal is output to a signal lamp, a relay, or the like. Molded case circuit breaker frame rated current 100A for single breakpoint conversion contacts, 225A and above for bridge contact structure, the agreed heating current is 3A; frame rated current 400A and above can be installed with two normally open, two often Closed, the agreed heating current is 6A. The number of operational performance is the same as the total number of operational performance of the circuit breaker.

Alarm contacts

Alarm contact for circuit breaker accident, and this contact only acts when the circuit breaker trips and breaks. It is mainly used for free tripping when the load of the circuit breaker is overloaded or under voltage, and the alarm is touched. The head is switched from the original normally open position to the closed position, and the indicator light or bell, buzzer, etc. in the auxiliary line is turned on, and the fault trip state of the circuit breaker is displayed or reminded. Since the probability of free tripping of the circuit breaker due to load failure is not too much, the life of the alarm contact is 1/10 of the life of the circuit breaker. The operating current of the alarm contact will generally not exceed 1A. -Dongguan Xunwang Hardware Products Factory

Scatch release

The shunt release is a trip unit that is excited by a voltage source whose voltage is independent of the main circuit voltage. The shunt release is an accessory for remotely operated trips. When the power supply voltage is equal to any voltage between 70% and 110% of the rated control power supply voltage, the circuit breaker can be reliably disconnected. The shunt release is a short-time work system. The coil energization time can't exceed 1S, otherwise the line will be burned. In order to prevent the coil from being burnt, the molded case circuit breaker is connected with a micro switch in the shunt trip coil. When the shunt release is engaged by the armature, the micro switch is switched from the normally closed state to the normally open state, because the shunt release power supply The control line is cut off, and even if the button is pressed artificially, the shunt coil will never be energized again, which avoids the occurrence of coil burnout. When the circuit breaker is reclosed, the micro switch is in the normally closed position again. -Dongguan Xunwang Hardware Products Factory

Under voltage release

Undervoltage release is a type of trip that allows the circuit breaker to be delayed or without delay when its terminal voltage drops to a specified range, when the supply voltage drops (or even slowly drops) The undervoltage release shall operate within the range of 70% to 35% of the rated operating voltage. The undervoltage release shall be capable of preventing open circuit when the supply voltage is equal to 35% of the rated operating voltage of the trip unit. When the power supply voltage is equal to or greater than the rated working voltage of the 85% undervoltage release, the circuit breaker should be reliably closed under hot conditions. Therefore, when a certain voltage drop occurs in the power supply voltage of the protected circuit, the circuit breaker can be automatically disconnected to cut off the power supply, so that the load electrical equipment or electrical equipment below the circuit breaker is protected from undervoltage. When in use, the undervoltage release coil is connected to the power supply side of the circuit breaker, and the circuit breaker can be closed after the undervoltage release is energized, otherwise the circuit breaker cannot be closed.

Dongguan Xunwang Hardware Products Factory specializes in: metal stamping parts, computer heat sink processing, circuit breaker special motor, molded case circuit breaker, circuit breaker energy storage motor, circuit breaker motor, is a professional Dongguan motor production factory. Tel: 0769-86958478 Mr. Wang. Welcome all merchants to call to discuss cooperation!