ZT ac contactor selection of several main techniques and matters needing attention

motor lamination three phase induction wound rotor 
Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. silicon steel stamping 
5.stunning performance 
Contact parameters: the contactor's main contact 3 phase induction motor with double breakpoint bridge contact and single breakpoint finger contact two forms. The advantage of the former is with two effective generator price arcing area, arcing effect is good. Usually, rated voltage 380 v generator and below and rated current under 20 a and small capacity of ac contactor, use current 3 phase induction motor natural zero two near the cathode of the fracture effect can be extinguished arc. Rated current of 20 electric water pump ~ 80 a ac contactor, adding arc or using the circuit of the electric arc blowing conditions, have a double fracture to cooperate, can effectively arcing, but, to be reliable, sometimes still need to add gate or partition. If the rated current is larger than 80 a, ac contactor is double fracture of the main contact, the arcing must diesel generator set be equipped with arcing gate or adopt other arcing chamber. 


115/120 V AC Voltage and Three-phase Phase small 240v electric motor
Specifications
1.Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
Usually, the double fracture contact from smaller, structure is compact, small volume, also need not soft connection, therefore, to improve the diesel generator set mechanical life of contact. Double fracture contact parameters adjustment of inconvenience, however, generally no skid movement when closed, cannot remove oxide on the surface of the contact, so contact with silver or silver www.facebook.com/guohong.trading alloy materials, the high cost. Single fracture finger roll contactor in the process of closing a sliding movement, easy to remove the surface of the oxide, ensure reliable contact, so the contact can use copper or copper alloy materials, the cost is low. But with increasing of contact roller slide games contact mechanical wear. Since there is only one fracture, contact than double fracture alternator generator from big, so the volume is bigger also, dynamic contact should be through the soft connection external at the same time, so that the mechanical life is limited.