Molded case circuit breaker can automatically cut off the current when the current exceeds the jump setting. Plastic case refers to the use of plastic insulators as the shell of the device, used to isolate between conductors and grounding metal parts. Plastic case circuit breakers usually contain thermomagnetic trip units, while large plastic case circuit breakers are equipped with solid state trip sensors. The release unit is divided into thermomagnetic release unit and electronic release unit. Commonly used, the rated current has the following kinds of 16 25 30 40 50 75 80 100 125 160 200 225 250 315 350 400 500 630 A.

Intelligent universal circuit breaker is used in 50 Hz AC, rated voltage 400 V, 690 V, rated current 6300A and below distribution network, to distribute electric energy and protect lines, to prevent power equipment from being damaged by overload, undervoltage, short circuit, single-phase grounding and other faults. Circuit breaker has intelligent protection function, wide and accurate selective protection range, and can improve the reliability of power supply.

HKQ1 dual power automatic switch (referred to as dual power supply) is suitable for power supply systems with AC 501Hz, rated working voltage 400V, rated working current 63A and below. Selective conversion between two power sources can be carried out according to demand. The product has the functions of overload, short circuit and under-voltage protection, and also has the functions of fire fighting, double dividing and output closing signal. It is especially suitable for lighting lines of office buildings, shopping malls, banks and high-rise buildings which need fire protection.

HKQ1 dual power automatic switch (referred to as dual power supply) is suitable for power supply systems with AC 501Hz, rated working voltage 400V, rated working current 63A and below. Selective conversion between two power sources can be carried out according to demand. The product has the functions of overload, short circuit and under-voltage protection, and also has the functions of fire fighting, double dividing and output closing signal. It is especially suitable for lighting lines of office buildings, shopping malls, banks and high-rise buildings which need fire protection.

HKQ5 Automatic Switch (ATSE) is an automatic switch which integrates switch and logic control and realizes mechatronics. It is suitable for power distribution equipment of industrial enterprises with AC 50Hz, rated voltage AC400V, agreed heating current to 1600A. It has voltage detection, mandatory "0" and emergency manual operation. It is widely used in main and standby power supply of power supply system. Automatic conversion or automatic conversion of two load devices and safety isolation, etc. Switches are managed by logic commands issued by control circuit boards. The motor drives the operating mechanism of the main part of the switch, switching on the breaker circuit or converting the circuit quickly, and realizing safe isolation through obvious visible state.

HKCPS series control and protection switching appliances are suitable for AC voltage to 690 V150 Hz (60 Hz), rated current from 0.25A to 125A power system. They can connect, load and break the current under the normal conditions of E including the specified operating overload conditions, and can receive, load and break the specified abnormal conditions of current, such as short circuit current. It is widely used in construction, communication equipment, textile, metallurgy, petrochemical, water engineering, water treatment, mechanical equipment, complete sets of equipment, ships, food processing and motor control center and other fields.

Multifunctional power meter can measure the commonly used parameters of three-phase power system with high accuracy: three-phase voltage, current, active power, reactive power, power factor, grid frequency, active power, reactive power, and with communication interface and power pulse output function. Using MODBUS-RTU communication protocol, LED field display and remote RS-485 digital communication are realized. It has the characteristics of convenient wiring installation, simple wiring, convenient maintenance, small amount of work, field programmable setting of input parameters, and can complete the networking communication with different PLC and industrial computer in the industry.