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Tel: 86057761720369 
Mobile: 15868721000  
Fax: 86057761736962 
Sales:86057762717369 
Address: Yueqing City, Zhejiang
Province, China Huang seven town
Yueqing City Industrial Zone A  
Post Code: 325604  
Q Q: 35977770  
Website: www.

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DW45 universal type circuit breaker (DW45 intelligent circuit breaker) is now more popular universal type circuit breaker, mainly used for distribution network, the electric energy and protecting circuits for distribution, power supply and power equipment from overload, owe voltage, short circuit, the harm of grounding faults, and has a high accuracy of selective protection, improve the power supply reliability. But if the breaker selection or use undeserved, can cause error action or refuse to action, lose it should be up to protect, but reduce the reliability of power supply.
DW45 intelligent circuit breaker similar products (ABB, schneider company M series) low multiples feeder, short circuit protection) universal type breaker transfer to the factory model are not all the same as CW1, RMW1, HSW1, TRW1 universal type breaker rated current 630 A, rated voltage 400 V, limit short circuit points off capacity of 80, short-term resistance current 50, 1 s ~ 75 kA, 3200 A, there are three very and four very structure, fixed and drawer installation. Have zero fly arc, protect the diversity of characteristic features. Products comply with the low pressure switch GB14048.2) equipment and control equipment
Universal type circuit breaker in the selection of design should be emphatically consider the question:
1). Everything from the load of the protection of circuit breaker in divided into the following several types of general form, please indicate the selection:
(1). Wire, cable) type motor protecting?????? Designed for the motor less frequent, and the operation of the disruption, and the motor overload, short circuit happened when voltage protection and owed.
(3). Universal type circuit breaker is in different applications, provides a standard inverse time, rapid inverse time, express inverse time (general purpose), express inverse time (motor protection), and high pressure melting characteristics of optional silk compatible.
2.) four very breaker N % In % In
System, N 2 for one, considering safety (PEN, any time don't allow disconnect PEN
System, TN-C-S system can use four very circuit breaker, in order to ensure the maintenance service of security, but TN-C-S system, breaker N line, and can't answer the PEN lines;
(3). The line) circuit breaker)
About the intelligent controller
DW45 namely external power supply and speed saturated transformer common power supply, the universal type of intelligent controller divided into L circuit breaker (, M (and H (. L shows, and H has communication network function, conventional provide MODBUS-RTU
About the selective protection
Universal type circuit breaker is wide choices, that in short circuit, as in the series circuit breaker clear load side of another short circuit protection electric selectivity protection, that is, someone for the short time delay of (adjustable), the delay time at least not less than 0.05 s. This can avoid the possibility of power without cause. In addition, DW45
About owe voltage protection
The voltage protection device for additional owe the owe voltage tripping device, when voltage reduction to 35, tripping device can make the circuit breaker disconnect. Owe (zero) voltage tripping device is instantaneous and delay action two kinds. In some power supply lower quality system, the selection of the circuit breaker with owe voltage protection, it will be because voltage fluctuation and often cause to cut off the electricity. In this situation, if must take owe voltage tripping device, should consider to have the appropriate delay.
6).
Universal type breaker provides single-phase grounding protection function, one-phase ground fault current protection refers to the gold in hundreds of amp above ground protection attributes, when fault current to the setting value, the circuit breaker set time limit or inverse time action. General for neutral grounding system directly. Usually adopts three-phase vector and three way or three phasecurrent and neutral current vector and extremely way. For three-phase power imbalance of occasions, the proposal does not choose the single-phase grounding protection function, if not easy to cause circuit breaker wrong action. Leakage protection for optional function, when the leakage current to the setting value (general for dozens of Ann), the executive receiving circuit zero sequence current transformer secondary side induced voltage signal, drive conversion contacts leakage protection signal output, tripping device action to disconnect the circuit breaker.
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