SF6 LW36-40.5 Outdoor Vacuum Circuit Breaker | High Voltage Protection

Feature

The circuit breaker adopts the self-energy arc extinguishing principle and operates with low efficiency.

The arc extinguishing chamber valve is made of a new type of special alloy that is high temperature resistant and lightweight. Compared with similar products using traditional materials, the air flow characteristics and breaking performance are more stable and reliable.

The nozzle is made of PTFE (polytetraoxyethylene) with other trace components added, which has stable breaking performance and strong burning resistance.

The porcelain sleeve is used, which has good bending resistance. The production process and quality control are strict and reliable, which can ensure the safe operation of the circuit breaker.

The circuit breaker insulating tie rod adopts unique anti-loosening measures to make the circuit breaker operate more reliably.

It adopts a spring operating mechanism with small operating power, light weight and low noise, no leakage and high reliability.

The important parts in the mechanism are made of alloy steel, which has high strength and wear resistance, ensuring that the circuit breaker has a low failure rate during frequent operations.

The secondary circuit electrical components and SF6 density controller adopt high-quality products.

The product has a novel and bright appearance and a compact structure. The installation base frame is made of thick steel plates that are integrally bent. The surface adopts hot-dip galvanizing process. The exposed fasteners use high-strength hot-dip galvanized bolts. The interphase transmission connecting rods use high-strength aluminum profiles or stainless steel profiles. The mechanism box is Stainless steel, the product has excellent corrosion resistance.

Parameter

Reliable breaking performance: Using self-energy arc extinguishing technology, it can continuously break 40.5KA short-circuit current 22 times without maintenance.
Reliable mechanical operating performance: The mechanical life of the circuit breaker can reach 6,000 times of continuous operation. After simple adjustment, it can reach more than 10,000 times with high operating reliability.
Reliable insulation capability: The external insulation creepage distance is >31mmVKV, and it has strong resistance to pollution migration. It is suitable for safe operation in harsh environments with an altitude of no more than 3000m. The insulating tie rod can withstand 250KV/5min in the air.
Reliable sealing performance: ensuring that the annual leakage rate of sulfur hexafluoride gas is far less than 0.5%.
The dehumidification process of product parts is strict: the moisture content of SF6 is much lower than similar products.

parameter name		Parameter value
Rated voltage		40.5
Rated frequency		18415
Rated current		1000/1250/1600/2000/2500/3150/4000
Rated short circuit breaking current		25	31.5	40
Rated short-circuit switching current (peak value)		60	80	0
Rated short circuit withstand current (thermal stable current)		25	31.5	40
Rated peak withstand current (thermal stable current)		63	80	100
Rated out-of-step breaking current		6.3	8	10
Cumulative breaking times under rated short-circuit breaking current		30
Rated short circuit duration		4
Rated lightning impulse withstand voltage	relatively, alternately	185
	between fractures	215
Rated 1min power frequency withstand voltage	relatively, alternately	95
	between fractures	118
Rated operating sequence		O-0.3s-CO-180-CO
Closing time		≤100
Opening time		≤50
Breaking time		≤50
Total time		≤60
Closing synchronicity		≤3
Opening synchronicity		≤2
Closing coil, opening coil voltage		DC:220/110
Energy storage motor voltage		AC:220/110 DC:220/110
Single loop resistance		≤70
Rated SF6 other pressures		0.45
Annual gas leakage of SF6 gas		≤5%
SF6 gas moisture content		≤150
radio interference level		≤2500
Mechanical life		10000