Stn2 250 3p Moulded Case Circuit Breaker MCCB

Product Description

Product Description

STN2/STN3(NSXs Style)  MCCB circuit breakers 100/160/250/400/630A

NSXs series of MCCB reflects the latest current limiting principle and manufacturing technology, characterized by compact structures, full modularization, high breaking, and zero flashover. Circuit breaker is equipped with overload, short-circuit and undervoltage protection device, so as to protect the circuit and power supply equipment from damage.      

 

Compliance with standards

International standards

IEC947-1: general rules

IEC947-2: circuit breakers

IEC947-4: contactors and motor starters;

IEC947-5.1: control circuit breaker devices and switching elements; automatic control components.

National standards

GB14048.1: general rules

GB14048.2: circuit breaker

 

Specifications	NSXs100				NSXs160				NSXs250				NSXs400				NSXs630
Frame Current (A)	100				160				250				400				630
Number of Poles	3		4		3		4		3		4		3		4		3		4
Ultimate Breaking Capacity (Icu, kA)	F	N		H	F	N		H	F	N		H	F	N		H	F	N		H
AC220/240V (kA)	85	90		100	85	90		100	85	90		100	40	85		100	40	85		100
AC380/415V (kA)	36	50		70	36	50		70	36	50		70	36	50		70	36	50		70
Rated Insulation Voltage	AC800V
Rated Working Voltage	AC690V
Rated Current, Thermal Tripping, TMD, A	63, 80, 100				80, 100, 125, 160				125, 160, 200, 250				-				-
Rated Current, Electronic Tripping, MIC, A	40, 100				40, 100, 160				100, 160, 250				250, 400				250, 400, 630
Auxiliary, Alert, Fault Accessories	OF/SD/SDE/SDx
Shunt & Under Voltage Coil	MX/MN
Mechanical Life	50000				40000				20000				15000				15000
Electric life	30000				20000				10000				6000				4000

 

Ambient air temperature
The ambient air temperature is about +40 ºC; the ambient air temperature is below -5ºC; the average value of ambient air temperature 24h is not more than +35ºC.
Elevation: installation elevation of not more than 2000m.
Atmospheric condition:
Relative humidity of the atmosphere in the surrounding air temperature of +40ºC is less than 50%; the relative humidity at the lower temperature can be high; most of the wet month average maximum relative humidity of 90%, the monthly average minimum temperature of +25ºC and considering the temperature due to changes in product surface.
Pollution grade: grade 3.
 

Rated current of release(A)	Thermodynamic release (ambient temp +40°C)				operational current of magnetic ralease(A)
	1.05In(cold state) in operative time(h)		1.30(heat state) inoperative time(h)
In≤63	≥1		<1		10In±20%
63	≥2		<2		10In±20%
100	≥3		<3		5-10In±20%
Rated current of release(A)	Thermodynamic release (ambient temp +40°C)				operational current of magnetic ralease(A)
	1.0 In(cold state) operative time(h)	1.20(heat state) operative time(h)	1.50(heat state) operative time(h)	1.01(heat state) operative time(h)
12.5	≥2	<2	≤4min	2s	12In±20%

Our Services:
 

1. Competitive price
2. Continuance Service and support
3. Good-after service
4. Quality Reliability and Long Product Life.

  

FAQ

Q: Are you trading company or manufacturer ?

A: We are factory. Our teams have more than 20years experience in the field of Circuit Breaker...

Q: How long is your delivery time?

A: Usually, normal orders need 25days or so.

Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample for free charge,but,the express charge need be paid by the buyers.

Q: What is your terms of payment ?

A: Payment<=5000USD, 100% in advance. Payment>=5000USD, 30% T/T in advance ,balance before shippment.