Lw3-12 630-20 Sf6 Outdoor High Voltage Circuit Breaker
Lw3-12 630-20 Sf6 Outdoor High Voltage Circuit Breaker
Lw3-12 630-20 Sf6 Outdoor High Voltage Circuit Breaker
Lw3-12 630-20 Sf6 Outdoor High Voltage Circuit Breaker
Lw3-12 630-20 Sf6 Outdoor High Voltage Circuit Breaker
Lw3-12 630-20 Sf6 Outdoor High Voltage Circuit Breaker
Lw3-12 630-20 Sf6 Outdoor High Voltage Circuit Breaker

Lw3-12 630-20 Sf6 Outdoor High Voltage Circuit Breaker

LW3-12/630-20 column-mounted circuit breaker is suitable for opening and closing load currents and overload currents in the power system at a rated voltage of 12kV, rated current of 630A, 50/60Hz distribution network, and can automatically isolate the faulted distribution line section from the switch.

Feature

Suitable for Opening and Closing Load Currents and Overload Currents in The Power System At A Rated Voltage of 12kv, Rated Current of 630a, 50/60hz Distribution Network, and Can Automatically Isolate The Faulted Distribution Line Section from The Switch

In Addition to The Standard Ceramic Bushings, A Variety of Solutions are Available, Including Rubber Insulators on Epoxy Equipment Bushings

A Spring-Loaded Energy Storage Operating Mechanism Ensures Fast Closing and Breaking Operations (Less Than 110ms)

Standby Electronic Controller for Both Local Operation and Main Console Operation Using Ftu/Rtu Interface

The Switches are Made from Proven Robust and Corrosion Resistant Materials (304l Stainless Steel Plate for Warships), Ensuring A Long Service Life (30 Years) and The Ability to Perform A Range of Operations, Ideal for Column Mounted Equipment

Sf6 Gas is A Non-Toxic, Non-Flammable Electrical Insulating Gas with Excellent Arc Extinguishing Characteristics, Each Switch is Factory-Filled with Sf6 Gas, Sealed and Tested According to Iec60265-1(1988) and Gb3804-1990 Standards

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Product Introduction

Product Overview

 

LW3-12/630-20 column-mounted circuit breaker is suitable for opening and closing load currents and overload currents in the power system at a rated voltage of 12kV, rated current of 630A, 50/60Hz distribution network, and can automatically isolate the faulted distribution line section from the switch.

 

1. SF6 gas is a non-toxic, non-flammable electrical insulating gas with excellent arc extinguishing characteristics.

 

2. In addition to the standard ceramic bushings, a variety of solutions are available, including rubber insulators on epoxy equipment bushings.

 

3. The colour-coded main contact position indicator (green - open; red - closed) is easily visible when standing on the ground. This indicator is directly connected to the main contact drive shaft assembly to ensure accurate indication of contact status.

 

4. A spring-loaded energy storage operating mechanism ensures fast closing and breaking operations (less than 110ms).

 

5. Standby electronic controller for both local operation and main console operation using FTU/RTU interface.

 

6. The switches are made from proven robust and corrosion resistant materials (304L stainless steel plate for warships), ensuring a long service life (30 years) and the ability to perform a range of operations, ideal for column mounted equipment.

 

7. Each switch is factory-filled with SF6 gas, sealed and tested according to IEC60265-1(1988) and GB3804-1990 standards.

 

 

Technical parameter

 

Rated parameters

 

Other technical parameters

 

Power frequency withstand voltage

The rated voltage

12kV

Internal arc test

20kA/0.1sec

10sec (wet test)

45kV

Rated current

630A

Arc suppression medium

SF6Gas

Rated frequency

50/60Hz

Insulating medium

SF6Gas

1min (dry test)

50kV

Short-time Tolerance Current (RMS)

20kA/4sec

Creep distance (porcelain casing)

550mm

Creep distance (silicone sleeve)

615mm

1min (dry test)

50kV

Protection grade

54

 

 

 

Mechanical properties of

Impact pressure (1.2×50μs)

gas pressure

Closing/opening time

<0.1sec

relatively

85kV

rated working pressure(kgf/cm2G,at20ºC)

0.7

Mechanical stability operation

10,000 times

Explosion-proof device operating pressure(kgf/cm2G)

4~6

Ambient temperature

-25(-40)~70ºC

Between the fracture     

 95kV

minimum operating pressure(kgf/cm2G)

0.05

Gas leakage rate(cc/sec)

1.1×10-7

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