3p 4p DC MCCB Moulded Case Circuit Breaker 1500V

• Customization: Available
• Structure: MCCB
• Type: Circuit Breaker
• Model NO.: KYM3D-250
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection)
• Certification: ISO9001-2000, CE, CCC
• Rated Insulation Voltage Ui(V): 1600
• Rated Impulse Withstand Voltage Uimp(Kv): 12
• OEM: Yes
• ODM: Yes
• Product Name: DC MCCB
• Rated Insulation Voltage: 1500V
• Material: High Standard Plastic Copper and Silver
• Certificate: Ce/ISO9001
• Transport Package: Standard Carton
• Trademark: KAYAL
• Origin: China
• HS Code: 1904031930
• Production Capacity: 10000/Month

Product Description

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 

Frame level	250A	Rated working voltage	DC500V/DC1000V DC1250V/DC1500V
Rated working current(A)	100/125/140/160 /180/200/225/250	Rated insulation voltage	DC160
Pole number	2	Arcing distance	≤50mm
Breaking capacity	Icu=Ics=15kA	Mechanical life	200
Short circuit  instantaneous setting	5~10	Degree of protection	Ip20
Standard rule	GB14048.2 IEC60947

Description of protection

Overload long delay protection

Ambient temperature	Test current	Appointment time	Starting state
+50ºC±2ºC	1.05In	≥No action	Cold state
	1.3In	<2h action	Hot state

Short-circuit transient protection

Ambient temperature	Test current	Appointment time	Starting state
+10ºC~+40ºC	4In or 8In	≥200ms	No action
	6In or 12In	<200ms	action

Derated coefficient when ambient temperature changes

Ambient temperature	40ºC	45ºC	50ºC	55ºC	60ºC	65ºC
Derated coefficient	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 of a linked wire

Rated current	100A	125A	140A	160A	180A	200A	225A	250A
Cable intercepting area	35mm²	50mm²		70mm²	95mm²		120mm²

.High altitude derated coefficient

Altitude	2000m	3000m	4000m	5000m
Operating voltage derating coefficient	1	0.9	0.8	0.7
Operating current derating coefficient	1	0.96	0.93	0.9