Cjr3 scope of application:
The cjr3 series is a residual current relay of the ac type, mainly for the exchange of 50 hz, rated as working voltage of 690 v and below neutral points, and for the provision of a combination of residual current protections, such as circuit breakers or contacts, to provide for electrical circuit failure protection. The cjr3 series of relays can also be used to protect humans from indirect exposure to the risk of electrocution by preventing equipment and electrical fires caused by failed electrical currents。
Cjr3 features:
The upper limit of the surrounding air temperature is +50°c and the lower limit is -35°c
(b) the installation site does not exceed 2,000 m above sea level
The relative humidity of the air at the installation site does not exceed 50% at +50°c; it can be higher at lower temperatures, e. G. 95% at 25°c。
The exterior magnetic field of the site should not exceed five times in any direction。
Power-sine wave malformation does not exceed 5%。
Level 3 contamination
The remaining electrical current relay installation category iv and the auxiliary circuit and output circuit installation category iii。
3. 2 transport storage conditions
Low temperature lower limit -45°c
(b) a temperature ceiling of +55°c
Relative humidity (+25°c) does not exceed 95%。
