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LW8-40.5Y SF6 Circuit Breaker

Item:LW8-40.5Y SF6 Circuit Breaker
Good Arc Extinguishing Performance
SF6 gas quickly and reliably extinguishes arcs, ensuring safe interruption of fault currents.
Simple and Compact Design
The circuit breaker is compact and easy to install, with a simple, efficient structure.
Reliable Opening Performance
Ensures smooth, balanced operation for quick and consistent opening.
Sealed Construction, Low Noise
The sealed design results in low operational noise.
Low Maintenance Requirements
Requires minimal inspection and maintenance, reducing overall workload.

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Product Description

Item:LW8-40.5Y SF6 Circuit Breaker

· Long Service Life

· · The mechanism of the LW8-40.5Y SF6 Circuit Breaker is designed for over3000 operations, ensuring long-lasting performance.

· Reliable Sealing Performance

· · The breaker usesimported sealing rubber pads for reliable sealing.

· The dynamic seal features a“V”-shaped sealing ring withspring pressure compensation, ensuring a tight and durable seal.

· Theannual air leakage rate is kept below1%, thanks to the cooperation with the transformer’s secondary terminal board.

· Built-in Current Transformer

· · The current transformer is made withmicrocrystalline alloy materials, offeringhigh magnetic permeability.

· The accuracy of the current transformer reachesclass 0.2 or0.2s for precise measurement.

· Up to12 transformers can be connected, depending on user needs.

Model Description

Main Technical Parameters

No.	ltem		Unit	Data
1	Rated current	vllage	kv	40.5
	Rated insulation level	Lightning impact withstand voltage (full crest value)	kv	185
		Power frequency withstand voltage (Imin)	kV	95
2	Rated current		A	1600 2000
3	Mechanical life		次 fime	3000
4	Rated pressure of sulphur hexafluoride gas lgauge pressure at 20℃)		MPA	0.50
5	Alarm pressure/minimum functional pressure (gauge pressure at 20℃)		MPA	0.47/0.45
6 7	Rated short circuit switching current		kA	25 63	31.5
	Rated short-circuit closing current(peak)		KA		80
8	Rated Short-Time withstand current(thermal stable current)		kA	25	31.5
9	Rated Short-Time withstand current (thermal stabl current)		kA	60	80
10	Rated short circuit swilching current		kA	63	8
11	The cumulative number of switching times under rated short-circuil switching		次Times	15	10
12	Rated short circuit duration		S	4
13	Closing time lat rated operating voltagel			≤0.1
14	Switching time (at rated operating voltage)		S	≤0.06
15	Rated orer of operation			C-0.3s-CO-180s-CO
16	Rated opening and closing monomial capacitor bank current		A	400
17	In leakage		%years	≤1
18	Water content of sulfur hexafluoride gos(V/V)			≤150x10-9
19	CT14 spring operating mechanism with rated operating voltage
	Closing coil,opening coil voltage		V	IACI:220 380 IDC):48 110 220
	Energy storage motor voltage		V	IAC):220 380 (DC):110 220
20	Sulfur hexafluoride gas weight		KG	8
21	Weight of circuil breaker [induding operating mechanisml		KG	1400

Structure And Mounting Dimensions

Working Environment：

Item:LW8-40.5Y SF6 Circuit Breaker

· Ambient Temperature

· · The circuit breaker is designed to operate within a temperature range of-40°C to +40°C.

· For extreme temperatures, special measures may be required for performance stability.

· Altitude

· · Suitable for installations at altitudes up to3000 meters above sea level.

· For higher altitudes, adjustments to insulation or pressure might be needed.

· Humidity

· · The circuit breaker is designed to function in environments withrelative humidity up to 95% at 25°C.

· Special considerations are needed for high humidity areas to prevent corrosion or moisture ingress.

· Pollution Level

· · The breaker is designed for use in areas withpollution level up tolevel III, such as industrial or urban environments.

· Seismic Conditions

· · The breaker can withstandseismic shocks in line with standard safety regulations, ensuring stable operation during minor tremors.

· Ventilation

· · Proper ventilation is necessary for the breaker to maintainSF6 gas integrity and avoid overheating.

Possible causes of electrical circuit failure

Item:LW8-40.5Y SF6 Circuit Breaker

· Long Service Life

· · Themechanism of the LW8-40.5Y SF6 Circuit Breaker is designed for over3000 operations, ensuring durability and long-term performance.

· Reliable Sealing Performance

· · The breaker usesimported sealing rubber pads for reliable sealing.

· The dynamic seal incorporates a"V" type sealing ring with aspring pressure compensation structure to ensure a tight seal.

· Thesecondary terminal board is matched with the cooperative enterprise to ensure anannual air leakage rate of less than1%.

· Built-in Current Transformer

· · Thecurrent transformer is made frommicrocrystalline alloy materials, which offerhigh magnetic permeability for better efficiency.

· The accuracy of the current transformer reachesclass 0.2 or0.2s, ensuring precise measurements.

· The circuit breaker can accommodate up to12 transformers based on user requirements.

Product Real Shot

FAQ

Item:LW8-40.5Y SF6 Circuit Breaker

What is the LW8-40.5Y SF6 Circuit Breaker?

· Answer: TheLW8-40.5Y SF6 Circuit Breaker is a high-voltage, gas-insulated circuit breaker designed for40.5 kV systems. It usesSF6 (sulfur hexafluoride) gas for insulation and arc extinction. It is widely used in electrical substations and industrial power systems to protect circuits from overcurrent and faults.

2.What are the key features of the LW8-40.5Y SF6 Circuit Breaker?

· Answer:

o Service life: More than3000 operations.

o Sealed design with reliableSF6 gas insulation anddynamic seals.

o Current transformer withmicrocrystalline alloy andhigh magnetic permeability for precise measurements.

o Low annual air leakage rate (<1%) due to high-quality sealing.

o Compact design for space-saving installation.

3.What is the service life of the LW8-40.5Y SF6 Circuit Breaker?

· Answer: Themechanism of the circuit breaker is designed formore than 3000 operations, ensuring a long and reliable service life with proper maintenance.