CFW45 series intelligent circuit breaker(hereinafter referred to as breaker) is suitable for the circuit of AC 50/60Hz with rated voltage 400V,690V and rated current up to 6300A. It is mainly used to distribute electric energy and protect circuit and power supply equipment from overload, under-voltage short-circuit, and single-phase earthing. With intelligent and selective protection functions, the breaker can improve the reliability of power supply, and avoid unnecessary power failure. The breaker is applicable for power stations, factories, mines(for 690V) and modern high-building, especially for the distribution system of intelligent building.
The breaker conforms to IEC60947-2. The whole series have past CCC certification and CE certification.
Temperature condition:-5℃~+40℃; the average value within 24h not exceed +35℃.
Elevation: altitude of installation place shall not exceed 2000m.
Atmosphere condition: relative humidity at +40℃ shall not exceed 50%. Higher humidity is permissible at lower temperature condition. When the higher monthly average relative humidity is 90% in the humiddest month, the lowest monthly average temperature of this month is +25℃
And consider the influence of dew on product surface due to temperature changes.
Pollution grade: gradelll.
The breaker should be installed according to the requirement on the instruction manual: the vertical inclination degree shall not exceed 5°.
Intelligent controller is one of the core components of the circuit breaker
1. properties of the intelligent controller
a. Protective function of over-load long time-delay and inverse time limit, short time-delay and inverse time limit, short time-delay definite time limit instantaneous operation protection;
b. Single-phase earthing failure protection;
c. Display of setting current Ir and operational current;
d. Ampere meter;
e. Over-load alarm;
f. Short-circuit alarm
g. Testing of operational properties
Note: The breakers with telecommunication port are available to realize remote control to breaker through master computer.
2.Protection performances of over-current release
a.Ir and its inaccuracy of the controller
Note:
1. When the breaker could realize over-load with long time delay. short-circuit with short time-delay and short-circuit instantaneous protections, the setting ratings can not be over-lapped, and Ir1< Ir2< Ir3
2. When the frame is 3200A and above, the setting ratings range from 1.01ln to 75kA.
b. Characteristics of long time-delay protection
c. Characteristics of short time-delay protection.
For low over-current, inverse time-limit protection could be realized; when the over-current is>8 Ir1, it will automatically change to be definite time-limit protection properties.
Refer to table below for time-limit properties.
1.Shunt release
a.Shunt release is for remote breaking of circuit breaker so as to enhance security of the operator;
b.Ratings of shunt release
2. Under-voltage release
a. It is an optional accessory;
b. Mainly used to protection apparatus from damage due to lowering of the operational voltage to a certain value;
c. Two types of release are available: instantaneous release and time-delay release;
d. For breakers appended with the release, it should be electrified continuously;
e. Ratings of under-voltage release.
f. Operation properties of under-voltage release
Note:Error the time of time-delay is±10%
3.Closing electro-magnet
a.The magent is for remote making of circuit breaker so as to enhance security of the operator.
b.The mangent could not be electrified for a long time.
c.Ratings of the magnet.
4. Auxiliary contact
a. Conventional heating current of auxiliary contact:6A
b. Auxiliary contacts:4NO+4NC,3NO+NC,5NO+5NC(customization)
