GM8 series plastic shell circuit breakerDetailed product description：

Scope of application
The GM8 series molded case circuit breaker is one of the new circuit breakers developed according to the latest international standards. Its rated insulation voltage is 800V, suitable for infrequent switching and motor starting in circuits with AC 50Hz, rated working voltage of 400V or 690V, and rated working current of 10A to 800A. Circuit breakers have overcurrent, short-circuit, and undervoltage protection functions, which can protect distribution lines and power equipment from damage.  

execution standard
IEC60947-1 and GB14048.1-2006 General Provisions
IEC60947-2 and GB14048.2-2008 Low Voltage Circuit Breakers
IEC60947-4 and GB14048.4-2003 Contactors and Motor Starters
IEC60947-5-1 and GB14048.5-2008 Electromechanical Control Circuit Electrical Appliances

Performance characteristics
The GM8-TM thermomagnetic molded case circuit breaker has two protection functions: overload long delay and short circuit instantaneous protection.
·The GM8-TM full series circuit breakers can be equipped with unit box type internal accessories.
·GM8-TM full series circuit breakers have no arcing.

The GM8-E series electronic distribution protection molded case circuit breaker is equipped with an electronic release GER23E using microprocessor technology, which can ensure high-precision tripping and high reliability of action, and the action accuracy is not affected by external environmental temperature. GER23E can be fully integrated into circuit breakers and achieve multiple characteristic protections for distribution lines without the need for an external working power supply. It has three-stage protection function and has good selective coordination with other protection devices connected in the same circuit in case of short circuit.
·It has three protection functions: users can adjust the Ir and Ii of the release according to the load current requirements, Isd can be connected with Ii and can be turned off; The electronic controller does not require a separate external power supply from the user, and the current signal and control power come from the ring current transformer integrated into the circuit breaker;
·Equipped with pre alarm indication: When the load current exceeds the preset current, the light emitting diode (PAL) on the circuit breaker cover indicates yellow;
·Overload indication: When the load current exceeds the set current, the LED (OVER) on the circuit breaker cover indicates in red;
·Reliable backup protection: When the circuit breaker is closed and running, if a short-circuit current I ≥ 20Inm occurs in the line, the circuit breaker will be directly tripped by the backup electromagnetic trip mechanism;
·Handheld specialized testers can be provided to test the reliability of the electronic controller integrated inside the circuit breaker;
·Zero arcing distance: making the distribution system safer and more reliable;
·Differential protection expert system: The short-circuit short delay time is set according to the rated current In of the circuit breaker, and the trip time and return time have been set, making differential coordination very simple.

The GM8 series plastic shell circuit breaker meets the electromagnetic compatibility requirements of Appendix J of GB14048.2.
The GM8 Zn (intelligent body control type) and GM8 Zs (intelligent external control type) series of plastic case circuit breakers for distribution protection are equipped with intelligent release devices GER53Z and GER53ZS using microprocessor technology, which can ensure high release accuracy and high action reliability, and the action accuracy is not affected by external environmental temperature. The GER53Z can be fully integrated into the circuit breaker and achieve multiple characteristic protections for distribution lines without the need for an external working power supply. The GM8-Z intelligent distribution protection molded case circuit breaker has three-stage protection function and has good selective coordination with other protection devices connected in the same circuit in case of short circuit.
·It has three protection functions: users can set the current and time of the release according to the load current and system requirements; The intelligent controller does not require a separate external power supply from the user. The current signal and control power come from the ring current transformer integrated into the circuit breaker;
·Equipped with pre alarm indication: When the load current exceeds the preset current, the light emitting diode (PAL) on the circuit breaker cover indicates yellow;
·Overload indication: When the load current exceeds the set current, the LED (OVER) on the circuit breaker cover indicates in red;
·LCD screen: GM8 Zs circuit breaker with LCD display screen;
·Reliable backup protection: When the circuit breaker is closed and running, if a short-circuit current I ≥ 20Inm occurs in the line, the circuit breaker will be directly tripped by the backup electromagnetic trip mechanism;
·Handheld specialized testers can be provided to test the reliability of the intelligent controller integrated inside the circuit breaker;
·Zero arcing distance: making the distribution system more reliable and safe;
·Precise and adjustable differential coordination: Users can freely set the operating current and time of upper and lower circuit breakers, achieving precise coordination of their operating characteristics and achieving selective protection.
Complies with the electromagnetic compatibility requirements of Appendix J of GB14048.2.