Residual Current Protection Circuit Breaker

 

LTZM2L series residual current protection circuit breaker (hereinafter referred to as protector) is a technologically innovative patent product developed by our company in recent years to adapt to the actual environment of safe electricity consumption in urban and rural areas. It is a multi-functional intelligent comprehensive protector integrating the functions of residual current protection, circuit main switch, manual and automatic opening and closing.

LTZM2L series protectors are suitable for low-voltage power grids with three-phase four-wire neutral point directly grounded. In addition to residual current, overload, short circuit and other protections, it also has undervoltage, overvoltage, phase loss, zero loss, etc. with information data display, It is an intelligent product with multiple functions such as information and data query and storage, remote switch and control, switch status signal, prepaid meter control, etc.

This product implements GB14048.2/IEC60947-2 standard.

 

 

 

Normal working conditions

 

●Ambient temperature: -40℃~40℃;
●Relative air temperature: when the monthly average minimum temperature of the wettest month does not exceed 25°C, the monthly average maximum relative humidity of the month does not exceed 90%, and the condensation on the surface of the product due to temperature changes is taken into account;
●Altitude: no more than 2000 meters;
●Pollution level: level 3;
●Installation category: Ⅲ;
●Installation site: the external magnetic field shall not exceed 5 times of the earth’s magnetic field in any direction;

 

 

The main technical parameters

 

Rated voltage/frequency	AC400V/50Hz three-phase four-wire system (3N)
Rated current	100A (65~100 adjustable); 250 (225A) (100~225/250 adjustable); 400A (250~400 adjustable); 630A (400~630 adjustable); 800A (630A-800A adjustable):
Rated impulse withstand voltage	8KV
Rated insulation voltage	AC1KV
Rated residual operating current	100, 200, 300, 500, 1000mA
Rated residual non-operating current	0.5l△no
Automatic tracking of residual current	100~1000mA
Classification of action characteristics	AC type
Rated breaking time	0.3S, 0.5S, delay type
Delay type limit non-driving time	△t60ms, △t1kms
Rated undervoltage action value	(105~160V) adjustable
Stabilized overvoltage action value	(265~300V) adjustable
Reclosing time	20s~60s
Rated short-circuit breaking capacity	See Table 1 for details
Rated short-time withstand current	See Table 1 for details (Type B)
Use category	Class A, Class B
Overcurrent Protection Features	(See Table 2, 3)
Load Control Protection Features	(See Table 4)