AC Contactor, Contact, Magnetic Contactor manufacturer / supplier in China, offering 3 Phase Electrical Magnetic Auxiliary AC Contactor with Ce ISO, 120kw Electric Vehicle Charging Pile/Station, 90kw Electric Vehicle Charging Pile/Station and so on.
Min. Order / Reference FOB Price | |
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1 Piece | US $30.00/ Piece |
Local Area: | Wenzhou, Zhejiang, China |
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R&D Capacity: | OEM, ODM, Other |
Payment Terms: | LC, T/T, D/P, PayPal, WesternUnion, Small-amountpayment |
Structure: | MCCB |
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Type: | Circuit Breaker |
Function: | Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvo |
DC system-specific circuit breakers are used in rated insulation voltage of 1600V and a rated operating voltage of DC1500V and below, and rated operating currents of 250A and below. C ircuit breakers are mainly used for overload and short circuit protection of distributed power and protection circuits and power equipment in DC systems . U nder normal circumstances can be used as a line of infrequent conversion and DC motor infrequent start.
1.Normal conditions of use
Ambient air temperature does not exceed the upper limit of +70ºC, the lower limit of not less than -40ºC , 24-hour average does not exceed +35ºC. (Note: Circuit breakers for use in ambient air temperatures above + 70ºC or below -40ºC should be consulted with the manufacturer);
The installation site of the altitude does not exceed 2000m (2000m above the need for the corresponding derating)
The relative temperature of the atmosphere is not more than 50% at the highest temperature around +40ºC, and can be compared at a lower temperature.High relative humidity (for example, 90% at 20ºC), and the consideration of temperature change on the surface of the product dew.
2.Normal installation conditions
Installation conditions: the general should be vertical installation or horizontal installation;
Installation categories: Class III of circuit breaker main circuit, control circuit and auxiliary circuit are class II.
Pollution level: Three
3.Normal storage and transport conditions
The temperature limit is not lower than -40ºC,the upper limit does not exceed +70ºC Relative humidity (25ºC) does not exceed 95ºC;
The product should be lightly moved during transport,should not be reversed should be acoided violent collision Main technical parameters
Main technical parameters
framelevel | 250A | Ratedworkingvoltage | DC500V/DC1000VDC1250V/DC1500V |
Ratedworkingcurrent(A) | 100/125/140/160 /180/200/225/250 | Ratedinsulationvoltage | DC160 |
Polenumber | 2 | Arcingdistance | ≤50mm |
Breakingcapacity | Icu=Ics=15kA | Mechanicallife | 200 |
Shortcircuit instantaneoussetting | 5~10 | Degreeofprotection | Ip20 |
Standardrule | GB14048.2IEC60947 |
Description of protection
Overload long delay protection
Ambienttemperature | Testcurrent | Appointmenttime | Startingstate |
+50ºC±2ºC | 1.05In | ≥Noaction | Coldstate |
1.3In | <2haction | Hotstate |
Short-circuit transient protection
Ambienttemperature | Testcurrent | Appointmenttime | Startingstate |
+10ºC~+40ºC | 4Inor8In | ≥200ms | Noaction |
6Inor12In | <200ms | action |
Derated coefficient when ambient temperature changes
Ambienttemperature | 40ºC | 45ºC | 50ºC | 55ºC | 60ºC | 65ºC |
Deratedcoefficient | 1In | 0.97In | 0.93In | 0.89In | 0.85In | 0.82In |
A comparative relationship between the rated current of a circuit breaker and the cross section ofa linked wire
Ratedcurrent | 100A | 125A | 140A | 160A | 180A | 200A | 225A | 250A |
Cableinterceptingarea | 35mm² | 50mm² | 70mm² | 95mm² | 120mm² |
.High altitude derated coefficient
Altitude | 2000m | 3000m | 4000m | 5000m |
Operatingvoltagederatingcoefficient | 1 | 0.9 | 0.8 | 0.7 |
Operatingcurrentderatingcoefficient | 1 | 0.96 | 0.93 | 0.9 |