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outdoor high voltage AC SF6 circuit breaker LW□-252KV 4000A 50KA from JUCRO Electric

outdoor high voltage AC SF6 circuit breaker
Rated voltage: 252KV
Rated current: 4000A
Type:  LW□-252KV 4000A 50KA
Brand: JUCRO

Quantity

Product Detail

outdoor high voltage AC SF6 circuit breaker LW□-252KV 4000A 50KA from JUCRO Electric


Meaning of type

Introduction

The LW□-252/4000-50 self-extinction Ac circuit breaker which is outdoor type finds its universal range of applications for the electrical system with elevation not greater than 2000m, ambient temperature not lower than-30C, dirtiness grade not higher than IV, alternating current 50Hz and the maximum voltage 126kV. It is used for cutting the rated current, malfunction current or switching the circuitry, to control and protect the electrical system, and it can also be used for connecting with the circuit breaker

The gas of the SF6 is employed as the arc-extinguishing medium and the dielectric material. The self-extinction technology and the new-type spring operating mechanism are introduced in the SF6 circuit breaker. Thus the circuit breaker has good qualities with long electrical life, low operation power, lower noise, high reliability, simple structure, small and long overhaul periods. It can fully replace the import same type one.

 

Caracteristic of structure

 

The breaker introduces the three-phase porcelain -pole with single interrupter structure. A spring operating mechanism is supplied and the mechanical action of the three-phase is inner connected. The gas of the SF6 is connected in the three-phase pole parts. A density controller with temperature compensation is used to monitor the gas of the SF6. Because of the self-extinction arc control principle and optimized design, it improves the efficiency of mechanism and reduces the operating power

 

Excellent breaking performance and long electrical life

 

High mechanism reliability and can be operated frequently

Because of the high insulation intensity and excellent contact movement, the breaking capacity current will not re-burn

 

The circuit breaker has high outer insulation level and ratio creepage distance is greater than. So it has excellent performance of resisting the filth and the earthquake, it is also can be operated safely under the environment with atrocious weather

 

High carrying ability: it has high capability margin as the temperature of each contact rises when it is under temperature rise test in the circuit (1.2 times 0f 4000A)

 

The appearance of the breaker is compact, and the installation and debugging is very easy. The maintenance is also very convenient

 

Main technical data of breaker

No

Name


Unit

Value

1

Rated voltage

KV

252

2

Rated power frequency withstand voltage(1 min)

To earth

KV

460

Between interrupter

460+146

3

Rated thunder impulse withstand voltage

To earth

1050

Between interrupter

1050+206

4

Rated frequency

HZ

50

5

Rated current

A

4000

6

Amplitude factor


1.3

7

Rated short-circuit breaking current

KA

50

8

Rated short-circuit making current(peak)

KA

125

9

Rated short-circuit withstand current

KA

50

10

Rated peak value withstand current

KA

125

11

Rated short-circuit duration

s

3

12

Rated out-of-phase breaking current

KA

12.5

13

Breaking current of close-in fault

KA

90%lk,75%LK

14

Rated line-charging breaking current

A

200

15

Operating sequence


0-0.3s-CO-180s-CO

16

Resistance of the main circuit

µΩ

55

17

Rated gauge pressure of SF6(20)

Mpa

0.6

18

Minimum functional gauge pressure(20)

Mpa

0.55±0.015/0.50±0.015

19

Annual leakage rate of SF6


0.5%

20

Amount of water of SF6(V/V)

ppm

150

21

Mechanical life

times

10000

22

Electrical level of radio interference

µ V

<500

23

Creepage distance

Between interrupter

mm

8660

To earth

6900

24

Each filled with SF6 gas weight

kg

25

25

Weight per breaker

kg

1500

 

 

Main technical data of structure

 

No

Name


Unit

Value

1

Auxiliary circuit voltage

V

DC220V、AC220V

2

The voltage/current of the opening and closing coils

V/A

DC110/4;Dc220/2.5

3

Energy storage motor

Rated voltage

V

DC220V、AC220V

The range of normal working voltage

V

5%-110%

Power

W

600

4

The energy storage time of motor

s

15

5

The loop voltage of the heater and the lamp

V

AC220V

6

Rated voltage of the auxiliary switch

V

DC220VAC220V

7

Rated current of the auxiliary switch

A

10

8

Contacts of the auxiliary switches


10 normal opened contacts and 10 normal closed contacts

 

Mechnical adjustment of the breaker

 

No

Name

Unit

Value

1

Center distance between poles

mm

3000-4000

2

Strode length of the moving

mm

160±3

3

Contact stroke length of the moving contact

mm

50±2

4

Switch- off time

m/s

30±5

5

Switch- on time

m/s

90±15

6

Break time

ms

60

7

Switch-on/off time

ms

80

8

Switch- off/on time

ms

300

9

The time difference of the opening of three phases

ms

3

10

The time difference of the closing of three phases

ms

5

 

Order notice

 

The type and the specification of the circuit breaker.

Rated electric parameter(voltage, current, rated short-circuit breaking current and so on)

Environmental condition(temperature, altitude, filth level and so on)

Rated electric parameter of control loop(rated voltage of energy storage motor, rated voltage of the opening and closing coils).

The name and the number of the accessories when required.

The connection of the primary upper terminal.

 

1. Weight: 4500kg( with gas)

Total weight of gas: 24kg

2. Foundation load: static state 4500kg(three level)

1500kg(each pole)

Dynamic horizontal direction F: 2500kg

Vertical direction(upward): 3500kg;

Vertical direction(downward): 6000kg

3. Level degree of concrete surface not exceeds 1.5mm

4. Mounting hole for connection of terminal block and primary line, users shall drill as required on site

Material of terminal block: aluminum alloy 2A12-T4




No comment

Product Detail

outdoor high voltage AC SF6 circuit breaker LW□-252KV 4000A 50KA from JUCRO Electric


Meaning of type

Introduction

The LW□-252/4000-50 self-extinction Ac circuit breaker which is outdoor type finds its universal range of applications for the electrical system with elevation not greater than 2000m, ambient temperature not lower than-30C, dirtiness grade not higher than IV, alternating current 50Hz and the maximum voltage 126kV. It is used for cutting the rated current, malfunction current or switching the circuitry, to control and protect the electrical system, and it can also be used for connecting with the circuit breaker

The gas of the SF6 is employed as the arc-extinguishing medium and the dielectric material. The self-extinction technology and the new-type spring operating mechanism are introduced in the SF6 circuit breaker. Thus the circuit breaker has good qualities with long electrical life, low operation power, lower noise, high reliability, simple structure, small and long overhaul periods. It can fully replace the import same type one.

 

Caracteristic of structure

 

The breaker introduces the three-phase porcelain -pole with single interrupter structure. A spring operating mechanism is supplied and the mechanical action of the three-phase is inner connected. The gas of the SF6 is connected in the three-phase pole parts. A density controller with temperature compensation is used to monitor the gas of the SF6. Because of the self-extinction arc control principle and optimized design, it improves the efficiency of mechanism and reduces the operating power

 

Excellent breaking performance and long electrical life

 

High mechanism reliability and can be operated frequently

Because of the high insulation intensity and excellent contact movement, the breaking capacity current will not re-burn

 

The circuit breaker has high outer insulation level and ratio creepage distance is greater than. So it has excellent performance of resisting the filth and the earthquake, it is also can be operated safely under the environment with atrocious weather

 

High carrying ability: it has high capability margin as the temperature of each contact rises when it is under temperature rise test in the circuit (1.2 times 0f 4000A)

 

The appearance of the breaker is compact, and the installation and debugging is very easy. The maintenance is also very convenient

 

Main technical data of breaker

No

Name


Unit

Value

1

Rated voltage

KV

252

2

Rated power frequency withstand voltage(1 min)

To earth

KV

460

Between interrupter

460+146

3

Rated thunder impulse withstand voltage

To earth

1050

Between interrupter

1050+206

4

Rated frequency

HZ

50

5

Rated current

A

4000

6

Amplitude factor


1.3

7

Rated short-circuit breaking current

KA

50

8

Rated short-circuit making current(peak)

KA

125

9

Rated short-circuit withstand current

KA

50

10

Rated peak value withstand current

KA

125

11

Rated short-circuit duration

s

3

12

Rated out-of-phase breaking current

KA

12.5

13

Breaking current of close-in fault

KA

90%lk,75%LK

14

Rated line-charging breaking current

A

200

15

Operating sequence


0-0.3s-CO-180s-CO

16

Resistance of the main circuit

µΩ

55

17

Rated gauge pressure of SF6(20)

Mpa

0.6

18

Minimum functional gauge pressure(20)

Mpa

0.55±0.015/0.50±0.015

19

Annual leakage rate of SF6


0.5%

20

Amount of water of SF6(V/V)

ppm

150

21

Mechanical life

times

10000

22

Electrical level of radio interference

µ V

<500

23

Creepage distance

Between interrupter

mm

8660

To earth

6900

24

Each filled with SF6 gas weight

kg

25

25

Weight per breaker

kg

1500

 

 

Main technical data of structure

 

No

Name


Unit

Value

1

Auxiliary circuit voltage

V

DC220V、AC220V

2

The voltage/current of the opening and closing coils

V/A

DC110/4;Dc220/2.5

3

Energy storage motor

Rated voltage

V

DC220V、AC220V

The range of normal working voltage

V

5%-110%

Power

W

600

4

The energy storage time of motor

s

15

5

The loop voltage of the heater and the lamp

V

AC220V

6

Rated voltage of the auxiliary switch

V

DC220VAC220V

7

Rated current of the auxiliary switch

A

10

8

Contacts of the auxiliary switches


10 normal opened contacts and 10 normal closed contacts

 

Mechnical adjustment of the breaker

 

No

Name

Unit

Value

1

Center distance between poles

mm

3000-4000

2

Strode length of the moving

mm

160±3

3

Contact stroke length of the moving contact

mm

50±2

4

Switch- off time

m/s

30±5

5

Switch- on time

m/s

90±15

6

Break time

ms

60

7

Switch-on/off time

ms

80

8

Switch- off/on time

ms

300

9

The time difference of the opening of three phases

ms

3

10

The time difference of the closing of three phases

ms

5

 

Order notice

 

The type and the specification of the circuit breaker.

Rated electric parameter(voltage, current, rated short-circuit breaking current and so on)

Environmental condition(temperature, altitude, filth level and so on)

Rated electric parameter of control loop(rated voltage of energy storage motor, rated voltage of the opening and closing coils).

The name and the number of the accessories when required.

The connection of the primary upper terminal.

 

1. Weight: 4500kg( with gas)

Total weight of gas: 24kg

2. Foundation load: static state 4500kg(three level)

1500kg(each pole)

Dynamic horizontal direction F: 2500kg

Vertical direction(upward): 3500kg;

Vertical direction(downward): 6000kg

3. Level degree of concrete surface not exceeds 1.5mm

4. Mounting hole for connection of terminal block and primary line, users shall drill as required on site

Material of terminal block: aluminum alloy 2A12-T4






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