Elevated porcelain post outdoor AC HV SF6 circuit breaker

Outdoor live tank AC High-Voltage SF6(SF6) circuit breaker (hereinafter referred to as "circuit breaker") is an outdoor high-voltage distribution switchgear with three-phase AC 50Hz and rated voltage of 40.5kV. It can be used to open and close rated current and fault current, switch on and off capacitor banks, and switch lines. It is especially suitable for frequent operation and can also be used as a contact circuit breaker

General:

The live tank circuit breaker uses SF6 gas as the arc extinguishing and insulation quality is installed outdoors and adopts the elevated porcelain column structure.The circuit breaker complies with technical standards such as GB / t1984-2014 high voltage AC circuit breaker, DL / t402-2016 high voltage AC circuit breaker, and JB / T 9694-2008 high voltage AC sulfur fluoride circuit breaker

Service Environment

Ambient temperature: maximum temperature +40℃; Minimum temperature -30℃.
Relative humidity: daily average relative humidity ≤90%; Monthly average relative humidity ≤95%.
Altitude: the altitude under normal use conditions does not exceed 1000m(plain type); Special use conditions altitude does not exceed 3000m(referred to as plateau type);
Wind speed not exceeding 34m/s(corresponding to 700Pa on the surface of the cylinder);
The seismic intensity does not exceed 8 degrees (horizontal acceleration 0.25g, vertical acceleration 0.125g);
Air pollution level :IV; Minimum nominal creepage distance :31mm/kV.

Key Feature

The circuit breaker is a three-phase discrete porcelain column structure and adopts a pressurized gas interrupter. The three phases are fixed on a common frame, and the three phase gas is connected through a steel pipe.
The circuit breaker is composed of arc extinguisher chamber, porcelain sleeve of pillar, drive shaft, connecting rod, bottom frame and spring operating mechanism.
Excellent breaking performance, short arc burning time, rated short circuit breaking current up to 40kA.
Reliable insulation, high mechanical reliability, strong arc extinguishing ability, frequent operation.
Switching capacitor bank current 630A without reignition.
It can be equipped with 3 ~ l2 built-in current transformer, simple structure, small volume, long period without maintenance.
The bottom frame adopts the overall surface treatment technology, beautiful appearance and strong anti-corrosion ability.

Technical Data

Mane		Unit	Data
Rated frequency		Hz	50
Rated voltage		kV	40.5
Rated current		A	1250/1600/2000
Rated Short-Circuit Breaking Current		kA	31.5
Rated Short-Circuit Closing Current			80
Rated Short-Time Withstand Current			31.5
Rated Peak Withstand Current			80
Rated Out of Step Breaking Current			10
Rated Short-Circuit Continuous Time		S	4
Rated Short-Circuit Breaking Current Breaking Times		Times	10
Rated short-time power frequency withstand voltage	Interphase, to earth(dry)	kV/min	95/1
	Fracture (dry)		118/1
	Interphase, to earth(wet)		80/1
	Auxiliary circuit to earth		2/1
Rated lightning impulse withstand voltage	Interphase, to earth	kV	185
	Fracture		215
Rated Operating Voltage and Auxiliary Circuit Rated Voltage		V	AC220,DC220
Main Circuit Rsistance	Rated Current 1600A and below	micro-Ohm	Not more than 90
	Rated Current more than 1600A		Not more than 40
Closing Time	Under AC Voltage	ms	Not more than 100
	Under DC Voltage		55~100
Opening Time	Under AC Voltage		Not more than 60
	Under DC Voltage		30~65
Closing-Opening Time			Not less than 120
Opening-Closing Time			Not more than 50
Full Breaking Time			Not more than 78
Rated Operating Order			0-0.3s-C0-180s-CO
Moving Contact Travel		mm	96±2.5
Contact Opening Distance		mm	60±1.5
Closing buffer Stroke		mm	10±2
Phase-to-Phase opening Synchronism		ms	Not more than 3
Phase-to-Phase closing Synchronism		ms	Not more than 3
Phase spacing		mm	725
Annual Gas Leakage rate of SF6		%	Not more than 0.5
SF6 Gas Moisture content (ppm, gauge pressure at 20 degrees Celcius)	Handover Acceptance Value	V/V	Not more than 150
	Distance Travel		Not more than 300
SF6 Gas Rated Pressure (gauge pressure at 20°℃)		MPa	0.45
SF6 Gas Replenish Pressure (gauge pressure at 20°C)			0.42
SF6 Gas Locked Pressure (gauge pressure at 20℃)			0.4
Mechanical Life		Times	6000
SF6 Gas Weight		Kg	5
Weight (with CT)			800
Weight (without CT)			1000