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LW8-40.5 High Voltage Electric Vacuum SF6 Circuit Breaker for Substations

LW8-40.5 outdoor high-voltage sulfur hexafluoride circuit breaker (hereinafter referred to as "circuit breaker") is outdoor electrical equipment with three-phase AC 50Hz, which is applicable to the control and protection of 35kV Power Transmission and distribution system and can also be used to connect circuit breakers and switch capacitor banks.

LW8 - 40.5 circuit breaker is equipped with CT T14 spring operating mechanism.

The circuit breaker meets the requirements of GB / T 1984-89 AC high voltage circuit breaker and IEC publication high voltage AC circuit breaker.
 
Availability:
Quantity:

Product Features:


High Voltage Capability:

The Circuit Breaker is designed for high-voltage applications, suitable for voltages up to 40.5kV, ensuring compatibility with various power systems.


Vacuum Interruption Technology:

Utilizing vacuum interrupter technology, this Circuit Breaker offers superior arc-quenching performance, reducing arc damage and extending the lifespan of the breaker.


SF6 Gas Insulated:

The SF6 Circuit Breaker ensures excellent dielectric properties by using SF6 gas for insulation, providing reliable operation under harsh environmental conditions.


High Breaking Capacity:

With a breaking capacity of up to 31.5kA, the SF6 Circuit Breaker ensures efficient fault clearing, providing protection for high-voltage electrical systems.


Compact Design:

The Vacuum SF6 Circuit Breaker features a compact and space-saving design, ideal for high-voltage distribution applications with limited space.


Reliable and Low Maintenance:

Designed for durability and minimal maintenance, the SF6 Circuit Breaker offers long-term reliability and reduces the need for frequent interventions.


Product advantages:


High performance and reliability:

The circuit breakers guarantee excellent performance and reliability even under extreme operating conditions, ensuring optimal protection of high-voltage systems.


Reduce downtime:

SF6 circuit breakers have fast response times and excellent arc-extinguishing capabilities, minimizing downtime and increasing the operational efficiency of the grid.


Reduce maintenance costs:

Because of its low-maintenance design, this circuit breaker significantly reduces operating and maintenance costs, helping to reduce total cost of ownership.


Space-saving design:

Vacuum SF6 circuit breakers are compact and ideally suited for space-constrained applications, allowing efficient use of substation area.


Advanced protection features:

SF6 circuit breakers feature advanced protection features that provide fault isolation and fast arc suppression, ensuring comprehensive system protection.


Applications:


Power Substations:

Ideal for Circuit Breaker applications in high-voltage substations, ensuring safe and efficient power distribution in industrial and urban infrastructure.


Electric Power Systems:

The LW8-40.5 Circuit Breaker is commonly used in electric power systems for transmission and distribution, providing reliable fault protection.


Renewable Energy:

This SF6 Circuit Breaker is an excellent choice for renewable energy systems like wind and solar farms, where reliable high-voltage control and protection are necessary.


Industrial Applications:

Used in industries that require high-voltage distribution systems, the Circuit Breaker ensures safe and efficient power handling in critical industrial settings.


Power Plants:

SF6 Circuit Breakers are essential in power plants, safeguarding critical equipment and ensuring the continuous distribution of electricity.


FAQ (Frequently Asked Questions):


1.What is the maximum voltage rating of this Circuit Breaker?

The LW8-40.5 Circuit Breaker is rated for up to 40.5kV, suitable for a wide range of high-voltage applications.


2.What type of interruption technology does the Circuit Breaker use?

This Circuit Breaker uses vacuum interrupter technology, which offers exceptional arc-quenching capabilities and low-maintenance performance.


3.Can the LW8-40.5 Circuit Breaker be used in outdoor applications?

Yes, this SF6 Circuit Breaker is suitable for both indoor and outdoor use, depending on your specific installation needs.


4.How often does the Circuit Breaker need maintenance?

The vacuum SF6 Circuit Breaker requires minimal maintenance, with regular checks to ensure long-term performance and reliability.


5.What are the environmental considerations of this product?

The LW8-40.5 Circuit Breaker uses SF6 gas for insulation, which provides excellent protection without causing harm to the environment when properly maintained.


6.What is the breaking capacity of the LW8-40.5 Circuit Breaker?

The Circuit Breaker offers a breaking capacity of up to 31.5kA, ensuring effective protection in high-voltage electrical systems.

No.

Item

Unit

Data

1

Rated Voltage

kV

40.5

2

Rated Insulation Level

Lightning Impulse Withstand Voltage (Full-wave Peak Value)

185/215 (Fracture)

Power Frequency Withstand Voltage (1 minute)

95

3

Rated Current

A

1600, 2000


4

Mechanical Life

Times

3000


5

SF6 Gas Rated Pressure (gauge pressure at 20oC)

Mpa

0.45


6

Locked Pressure (gauge pressure at 20oC)

Mpa

0.45


7

Minimum Operating Ambient Temperature

oC

-30


8

Rated Short-Circuit Breaking Current

kA

25,  31.5


9

Rated Short-Circuit Closing Current (Peak Value)

63,     80


10

Rated Short-Circuit time Withstand Current (Thermal Stable Current)

25,  31.5

11

Rated Peak Value Withstand Current (Strive to Stabilize the Current)

63,     80

12

Rated Out of Step Breaking Current

63,     80

13

Rated Short-circuit Continuous Time

S

4

14

Closing - Opening Time

Not more than 0.1

15

Opening - Closing Time

Not more than 0.1

16

Rated Operating Order


Open- 0.3s - Close Open - 180s - Close Open

17

Rated Opening and Closing Current of Single Capacitor Bank

A

400

18

Under Rated Short-Circuit Breaking Current's Cumulative Breaking Times  

Times

15,   10

19

Annual Leakage Gas

% year

Not more than 1

20

SF6 Gas Moisture content (20oC)

PPm (V)

Not more than 50

21

Rated Operating Voltage of CT14 Spring Operating Mechanism

V

220V


Closing Coil, Opening Coil Voltage

AC220, DC110, 220


Voltage of Energy Storage Motor

AC220,  DC220


22

SF6 Gas Weight

Kg

8

23

Circuit Breaker (Including Operating Mechanism) Weight

1400

Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate.


USAGE: ENVIRONMENTAL CONDITION

1. Altitude: ≤ 1000m, If the altitude is higher than 1000m, the rated insulation level shall be corrected accordingly.

2. Ambient temperature: -40 oC ~ +45 oC,

3. Maximum daily temperature difference: 25 K

4. Humidity: Average daily relative humidity: 95%, average monthly relative humidity: 90%.

5. Sunshine intensity: not more than 0.1W/cm 2

6. Wind Speed: 34m/s

7. Wind pressure: 700Pa

8. Pollution level: e - level

9. Icing thickness: Not more than 10mm

10. Resistance to floor drain: horizontal acceleration 0.3g, vertical acceleration 0.2g


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