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CXGN/VB – 12 Vacuum Breaker Switchgear

CXGN/VB-12 side mounted vacuum circuit breaker cabinet is an indoor equipment. The cabinet is made of high quality steel by bending forming in bolt joint assembly. The appearance of the design is dignified. The switch cabinet is apply to rated voltage of 12kV, rated current 1600A and below, rated frequency 50Hz single bus or single bus section of the three-phase AC indoor distribution system, it is used for reception and distribution of electricity, and it can control, protect and monitor the circuit. Switchgear also has complete function of “five prevention”.

Equipped with the vacuum circuit breaker CKVB-12 researched by our company, the run of the switchgear is guaranteed with reliability. Meanwhile, the cost performance is highly improved.

product feature

Compact structure, small volume, only 50% ~ 60% of the KYN28 switchgear

Cabinet case is consisted of the front, the top, the side and the back panels which are made of excellent steel with reliable safety

Incoming and outgoing cable can be made as “top in and top out” cabinet besides “bottom in and bottom out” cabinet.

Protection grade is IP2X.
It is equipped with high-quality CKVB - 12 side-mounted type vacuum circuit breaker;

It can be installed perfectly together with load break switchgear in paralleling.

Three-phase bus bar from inside to outside in the bus bar cabinet is arranged at the back of meter cabinet.
Circuit breaker cabinet, bus bar cabinet and relay cabinet are separately isolated.

Microcomputer intelligent protection and relay protection are optional. 

Technical data for switchgear

Description 

 Unit 

Parameter

Rated voltage

kV

12

Insulated Level

Rated lightning impulse withstand voltage

kV

Phase-to-phase 75; Open contacts 85

Rated power frequency withstand voltage

kV

Phase-to-phase 42; Open contacts 48

Rated frequency 

Hz

50

Rated current for main busbar 

A

1250

1600

Rated current for branch busbar

A

630~1250

630~1250

Rated short-time withstand current (4s)

kA

25

31。5

31.5

Rated peak withstand current

kA

63

80

80

Protection class

 

IP2X


Technical data for CKVB vacuum circuit breaker 

Description

Unit

Parameter Data

Rated voltage

kV

12

Rated insulated level

Rated short-time power frequency withstand voltage

kV

42

Lightning impulse withstand voltage(full wave)

kV

75

Rated Frequency

Hz

50

Secondary circuit power frequency withstand voltage

v

2000

Rated current

A

630

1250

1600

Rated short-time withstand current

kA

25

25

31.5

31.5

Rated peak withstand current

kA

63

63

80

80

Rated short-circuit breaking current

kA

25

25

31。5

31.5

Rated short-circuit making current

kA

63

63

80

80

80Rated cable charging breaking current

A

52

Rated capacitor bank making inrush current

kA

12.5

Rated single/ back-to-back capacitor bank breaking current

A

630/400

Operating sequence

/

Opening-0.3s-closing opeing-180s-closing opening

Mechanical life

times

20000

Rated current breaking times( electrical life)

times

20000

Rated short-circuit current breaking times

times

50

Clearance between open contacts

mm

11±1

Overtravel

mm

3。5±1

Average closing speed

m/s

0。4~0。8

Average opening speed

m/s

0.9~1.3

Closing time

ms

30~70

Opening time

ms

20~50

Arcing time

ms

15

Bounce time for contact closing

ms

2

Asynchronous time for three-phase contact’s closing / opening

ms

2

Allowable accumulated wearing thickness of moving/fixing contact

mm

3


Technical data for stored-energy electromotor

Description

Unit

Parameter

Rated working voltage

V

DC220V

DC110V

Rated power input for motor

W

70/120

Stored energy time under rated working voltage

s

10

Normal working voltage range

85%-110%Un

Opening / Closing electromagnet technical data

Description

Unit

Parameter

Rated working voltage

V

DC220V

DC110V

Rated working current

A

1.05

2.10

Resistance for electromagnet coil opening at 20

Ω

160±8

40±8

Resistance for electromagnet coil closing at 20

Ω

160±8

40±8

Normal working voltage range

Closing:80%110%Un

Opening:65%120%Un, 30%Un should not opening

 Technical data for current transformer LFZJ1-10Q (this product is equivalent to LFZJ9-10) 

Rated primary current

Accuracy class & relevant rated load VA

Rated short-time  thermal current(kA/1s))

Rated dynamic peak current(kA)

Level 0.2

Level 0。5

Level 10P

5~200

10

10

15

0。7~28

1。75~70

300~315

10

10

15

28

70

400

10

10

20

40

100

500

10

10

20

40

100

600~630

10

10

20

40

100

750~800

20

20

25

63

130

1000

20

20

25

63

130

1200~1250

25

25

30

80

160

1500~1600

25

25

30

80

160

2000~3150

25

25

30

80

160

Technical data for HV disconnector GN38-12D 

Rated voltage

kV

12

Rated current

A

630   1250

Rated short-time withstand current(4s)

kA

25    31.5

Rated peak withstand current

kA

63    80

Power frequency withstand voltage(1min) phase-to-phase / open contacts

kV

42/48

Lightning impulse withstand voltage phase-to-phase/open contacts

kV

75/85

Main circuit resistor

μΩ

80    50

Center distance for phase-to-phase

mm

210

Technical data for HV earthing switch JN15(A)-12 JN15(A)-12

Rated voltage

kV

12

Rated short-time withstand current(4s)

kA

31.5

Rated peak withstand current

kA

80

Rated short-circuit making current

kA

80

Power frequency withstand voltage (1min)

kV

42

Lightning impulse withstand voltage

kV

75

Center distance for phase-to-phase

mm

210




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