Product overview
DW16 ACB ( hereinafter referred to as the circuit breaker ), mainly used for the exchange of 50Hz, rated current 100A to 630A, rated voltage 400V or 690V power distribution network, to the distribution of power, protection circuit and power supply equipment overload, under-voltage, short circuit. Also available in 50Hz, 380V network is used to protect the motor overload, under-voltage and short circuit. In normal conditions can be respectively used as line is frequently loaded and less frequent starting of motor.
Rated current 160A to 630A circuit breaker can also be used as the transformer neutral grounding of distribution system in TN single phase to ground short circuit protection of metal.
This product is in compliance with the GBI4048.2" low-voltage switchgear and controlgear low-voltage circuit breaker" IEC947-2 and JB8590.2" DW 16 series universal type breaker" and other standards.
Two: the meaning of model and classification
The 1 circuit breaker type and meaning
The 2 circuit breaker classification
( 1) by the use of:
Distribution of motor; protection; distribution and single phase grounding protection.
( 2) according to the driving device:
Handle lever transmission direct drive; motor drive.
( 3 ) according to the type of breaker:
With over current tripping device and a shunt tripping device;
With over current tripping device and an undervoltage tripper;
With over current tripping device, shunt tripping device and undervoltage tripper;
With over current tripping device, grounding releaser and undervoltage tripper;
With over current tripping device, grounding tripper, shunt tripping device and undervoltage tripper;
(4 ) according to the type of protection:
Short circuit instantaneous action;
Long-time delay overload and short circuit instantaneous action;
Overload long-time delay, instantaneous short circuit and single phase earthing instantaneous or delay action.
( 5 ) according to the earthing tripping device type:
Electromagnetic ( instantaneous ); electronic (transient or delay 0.4s action )
Three: the main technical parameters
1 of the rated current ( see Table 1 )
Table 1
The 2 circuit breakers rated insulation voltage of 690V, rated voltage and rated short-circuit breaking capacity ( see Table 2 )
Table 2
The 3 attachment to the rated control supply voltage ( Us ) or rated working voltage ( Ue )
Table 3
4 conventional heating current of auxiliary contacts for 6A, rated control power of 300VA (AC ) and 60W ( DC ). Auxiliary contact is usually three Chang Kaisan normally closed ( 3a, 3b ) or closed ( 5a, Wuchang Wuchang open 5b ) to other combinations please quote. Auxiliary contact with RL6-25 / 6 fuses are used in tandem, can reliably break prospective short-circuit current 1000A.
Four: operation conditions
The 1 closed
Motor operated circuit breaker in 85% ~ 110%Ue to ensure reliable closure.
2 disconnect
( 1) with shunt release disconnect
Shunt release in 70% ~ 110%Us ( grounding protection circuit breaker with Us for 220V should be in 70%x220V and 110%x220V ) can ensure that the breaker open.
( 2) with undervoltage release disconnect
When the voltage drop to 170%Ue to 35%Ue, undervoltage release should make the breaker. Power supply voltage less than 35%Ue, tripping device can prevent the circuit breaker closed, when the supply voltage is equal to or greater than 85%Ue can guarantee the circuit breaker closed.
( 3) the overcurrent tripping device in case of overload disconnect
Overload long-time delay tripping device and the ambient air temperature independent, its current setting value range of 0.64In-1.0In, all at the same time when energized inverse time characteristics in Table 4 and table 5 the distribution of return current of 0.9Ir, to protect motor return current of 1.0Ir. (see Table 4 for distribution circuit breaker of inverse time characteristic, table 5 for directly starting motor circuit breaker of inverse time characteristic )
Table 4
Table 5
( 4) the DW16-630 circuit breaker short circuit instantaneous protection tripping device instantly falls off, the current setting value in Table 6, current setting value accuracy is 20%
Table 6
( 5) performance of grounding protection
A breaker rated ground action current value ( I delta n ) I n ' 0.3In ( electronic type ) or 0.5In ( electromagnetic )
B breaker rated grounding current value ( 1An. ) I no 0.5I n.
C. Grounding protection breaking time
Circuit breaker in the Ian grounding transient protection for breaking time is not more than 0.1s, ground delay time delay time delay for 0.4s, accuracy is + / - 20%.
D. Three-phase unbalanced load does not lead to error action over current limit ( 1Bm )
In the absence of any grounding current, to flow through the circuit breaker circuit includes only two poles ( including a pole and through the detection of components of the N line ) circuit without error action of current limit values for 6In.
E. Load balancing without error action of over current limit value ( 1Bm ) in the absence of any grounding current, circuit breaker three link load balancing circuit, flow without causing the breaker misoperation current limit value with electromagnetic ground tripping device for 3In; with electronic type ground tripping device for 6In.
Five: outline and mounting dimensions