Nitrogen Injection System

• Function: Explosion Prevention and Fire Extinguishing
• Transport Package: Packages
• Specification: N2
• Model NO.: SNG
• Trademark: SNG
• Origin: China
• Production Capacity: 1000

Product Description

Principle of Extinct Fire:
When the transformer is on fire, the fire detector is activated, the gas relay closes, and the electric breaker switches off. As a result, BPZM-MRD Nitrogen Injection system is operated and the oil drain valve opens to draw off oil. Then nitrogen gas is continuously injected, the large amount nitrogen gas sufficiently cools down the transformer, extinguishes fire, and prevents any re-combustion.
 
Working Conditions:
1, Fire detector, drain valve, fire protection cabinet could be located outdoor. Control panel should be located indoor. Around the site there should be no violent vibration and shock, no corrosive gas.
 
2, Ambient Temperature
A) outdoor device (the fire prevention part): -40ºC ~ 60ºC
B) indoor device (the auto-control panel): 5ºC ~ 30ºC
 
3, Relative Humidity
A) outdoor device (the fire prevention part): ≤95 (@ 20ºC±5ºC)
B) indoor device (the auto-control panel): ≤85 (@ 20ºC±5ºC)
 
4, Power Source
Working power source:DC220V or DC110V
 
Functions:
Explosion Prevention and Fire Extinguishing
The system can extinguishing the fire immediately thro injected the N2 gas into the Transformer Tank.
The Nitrogen can be injected continuously for 30 mins to stir and cool down the
transformer oil, which also isolated the air from the tank.

 

Transformer Capacity(MVA)	≤50		>50,≤240	>240
Nitrogen Cylinder Volum(L)	40	60	40	40
Nitrogen Cylinder Quantity	1	1	2	4
Nitrogen Cylinder Initial Pressure(Mpa)	15
Nitrogen Pressure after pressure reduction (Mpa)	0.6
Nitrogen Volum after pressure reduction(L)	1000	1500	2000	4000
Continuous Nitrogen Injection Time(min)	31
Fire-extinguishing time(min)	less than1min	less than1min	less than1min	less than1min
Nitrogen Injection Valve Outlet Flow (L/min)	32.25	48.4	64.5	129
Nitrogen Flow Rate in Nitrogen Injection (Tube(m/s)	1.095	3.28	2.19	4.38
Nitrogen Injection Hole Quantity	2	2	4	6
Nitrogen Injection Flow(L/min)	16.25	24.2	32.5	32.5
Temperature Detector Quantity	6	6	8	12
Temperature Detector Operating Temperature (ºC)	130ºC±10%	130ºC±10%	130ºC±10%	130ºC±10%
Oil Drain Tube Diameter(mm)	≥DN100	≥DN100	≥DN125mm	≥DN125mm
Nitrogen Injection Tube Diameter(mm)	DN25
Quick Discharge Valve Operting Time (s)	<1s
Fire Extinguishing Cabinet Operating Temperature(ºC)	1:-20ºC~60ºC 2:-40ºC~60ºC (2 means in high and cold area)