Project Name

Unit

C- Load switch unit

C- Load switch unit

F-Combined electrical unit

V-Circuit Breaker Unit

Rated voltage

kV

12/24

12/24

12/24

Rated frequency

Hz

50

50

50

Rated current

A

630

125

630

Rated transfer current

A

-

1750

-

Rated insulation level

1min power frequency withstand voltage

(phase-to-ground)

Phase-to-phase, phase-to-ground

kV

-

42/65

-

Breakers between sections

kV

-

48/79

-

lightning impulse voltage

Phase-to-phase, phase-to-ground

kV

-

75/125

-

kV

-

85/145

-

Rated short-circuit breaking current

kV

20

315

20

Rated short-circuit closing current

kA

50

80

50

Rated short-circuit closing current (earthing switch)

kA

50

-

50

Rated short-time withstand current

Main circuit

kA

20

20

20

Earthing switch

kA

20

20

20

Rated short-time duration

Main circuit

s

4

-

4

Earthing switch

s

4

4

4

Rated peak withstand current

Main circuit

kA

50

-

50

Earthing switch

kA

50

50

50

Internal Arc Test (Internal Arc Test)

A

630

20kA/5S

630

Rated closed-loop breaking current

A

630

Limited by fuse

630

Rated active load breaking current

A

10

Limited by fuse

25

Rated cable charging breaking current

Times

5000

17.4

3000

Mechanical life

Load/isolating switch

Times

3000

5000

3000

Earthing switch

Times

-

3000

10000

Vacuum circuit breaker

Mpa

-

-

-

SF6 gas pressure (absolute pressure at 20℃)

-

-

0.035

-

Annual leakage rate

-

-

≤ 0.025% year

-

Protection class of gas box and fuse barrel

-

-

IP67

-

Protection grade of cabinet and enclosure

-

-

IP4X

-