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LW8A-40.5 SF6 Circuit Breaker

Item:LW8A-40.5 SF6 Circuit Breaker
Good arc extinguishing performance: Ensures reliable interruption of electrical currents.
Simple structure and compact size: Facilitates easy installation and efficient use of space.
Good opening performance, balanced operation: Enhances operational reliability and safety.
Sealed circuit breaker with small operation noise: Provides quiet operation and prevents external contamination
. Low inspection and maintenance workload: Reduces operational costs and improves efficiency.

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Product Description

Item:LW8A-40.5 SF6 Circuit Breaker

· Insulation and Arc Extinguishing Medium: Utilizes sulfur hexafluoride (SF6) gas for excellent insulation and arc extinguishing performance.

· Structure: Features a single-column, single-fracture design for each pole, ensuring compact and efficient operation.

· Arc Extinguishing Principle: Operates on the self-energy arc extinguishing principle for reliable performance.

· Actuator: Equipped with a CT14 spring actuator structure enabling three-phase mechanical linkage for synchronized operation.

· Compliance: MeetsGB1984 andIEC62271-100 international standards, ensuring safety and reliability.

Model Description

Main Technical Parameters

No.	ltem		Unit	Data
1	Rated	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		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:LW8A-40.5 SF6 Circuit Breaker

· Ambient Temperature:

· Maximum: +40°C

· Minimum: -30°C

· Altitude:

· ≤2000m (For installations above this altitude, insulation level adjustments are required).

· Wind Pressure:

· Not exceeding 700Pa (equivalent to wind speeds of approximately 34m/s).

· Seismic Resistance:

· Withstands earthquake intensity up to 8 degrees.

· Pollution Level:

· Suitable for Class I contamination levels.

· Maximum Daily Temperature Difference:

· Should not exceed 25°C.

· Installation:

· Suitable for bothside-mounted andmiddle-mounted configurations.

Possible causes of electrical circuit failure

Item:LW8A-40.5 SF6 Circuit Breaker

· Efficient Arc Extinguishing:

· Utilizes SF6 gas for superior arc suppression and insulation.

· Single-Pole Structure:

· Features a single-column, single-fracture design for each pole.

· Self-Energy Principle:

· Operates based on the self-energy arc extinguishing mechanism, ensuring reliable operation under high fault conditions.

· Spring Operating Mechanism:

· Equipped with a CT14 spring actuator for robust and precise mechanical linkage across three phases.

· Compliance:

· Conforms to international standardsGB1984 andIEC62271-100, ensuring quality and safety.

Product Real Shot

FAQ

Item:LW8A-40.5 SF6 Circuit Breaker

Q1: What is the rated voltage of the LW8A-40.5 SF6 Circuit Breaker?
A1: The rated voltage is 40.5 kV.

Q2: What is the interrupting medium used in this circuit breaker?
A2: It uses sulfur hexafluoride (SF6) gas as both the insulation and arc extinguishing medium.

Q3: How is the circuit breaker operated?
A3: The circuit breaker is equipped with a CT14 spring actuator, enabling mechanical linkage of three phases for synchronous operation.

Q4: Is the LW8A-40.5 compliant with international standards?
A4: Yes, it complies with GB1984 and IEC 62271-100 standards.

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