1. Application

HW45 series air 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.

2. Working Condition

Temperature condition: -5°C~+40°C; the average value within 24h not exceed +35°C. Elevation: altitude of installation place shall not exceed 2000m.

Atmosphere condition: relative humidity at +40°C 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°C. And consider the influence of dew on product surface due to temperature changes.

Pollution grade: grade III.

The breaker should be installed according to the requirement on the instruction manual: the vertical inclination degree shall not exceed 5°.

3. Specification

4. Intelligent Controller

Intelligent controller is one of the core components of the circuit breaker

4.1 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.

4.2 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 1.01 In 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.

5. Standard Composition

6. Accessories

6.1 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

6.2 Under-voltage release

a. It is an optional accessory;

b. Mainly used to protect 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

6.2 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.

6.2 Auxiliary contact

a. Conventional heating current of auxiliary contact: 6A

b. Auxiliary contacts: 4NO+4NC, 3NO+NC, 5NO+5NC(customization)

7. Outline and Installation Dimensions (mm)