Application arrange

HUW2( DW15H H) for short series intelligent air circuit breaker(hereinafter ca lled brea ker) is ap plie d in t he ne twor k cir cuit of AC 50H z,ra ted isolating voltage up to 690V, rated voltage below 690V and rated current between 400A and 4000A.It is mainly used for power distribution and between 400A and 4000A.It is mainly used for power distribution and protecting the circuit and power supply device from short-circuit, under voltage, single phase ground fault, and etc.This ACB has functions of intelligent protection and four-step selective protection, which can pre-

vent system from unnecessary power cut and enhance reliability of power supply. Impulse withstand voltage of the breaker is 12,000V. The product accords with IEC60947-2 and IEC60947-4.

2.2. Classification

2.2.1 Classified as per application

A:     selective type

B:     unselective type

2.2.2 Classified as per energy reservation

a. Energy-reserved operation(operation of energy reservation and switch- ing-in operation done twice)

b. Non- energy-reserved operation (operation of energy reservation and switching-in operation done once)

2.2.3  Classified as per operating types

a. Motor operated

b.  Manually operated

2.2.4 Classified as per installation types

a. Stationary type

b. Drawable  type

2.2.5 Classified as per pole numble.

a. Three poles

b. Four poles

2.2.6 Classified as per earthing in single phase or not

a. Protection without single phase earthing

b. Protection with single phase earthing

2.3 Categories of release

2.4. Property of intelligent over-current release

Intelligent over-current release; under-voltage instantaneous(or time delay) release; releasing release.

2.4.1 Functioning as overload long time-delay inverse time limit, short time-delay time setting limit and instantaneous action.

2.4.2 Protective function of single phase earthed

2.4.3 Overload alarming

2.4.4 Auto-examining: over-heat protection and auto diagnosis of mi- cro-computer

2.4.5 Testing: testing action property of release

Normal operating and mounting condition

3.1Ambient temperature

Upper limit value is no  more than +40  , lower limit value is no less than -5  and average value in 24 hours is no more than +35   .

3.2 Installation altitude is under 2000m

3.3 Air condition

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