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We are the supplier and exporter of low & medium voltage electric equipements: Electric Connectors, Industrial Plugs, XAC Pendent Pushbutton Switches, APP SB Power Connectors ,Contacts,Split Core Transformer, Clamp Transformer, Distribution box, LED Lampes. And crane parts: Electirc Hoist, Terminal Blocks, COB,XAC Pendant Control Stations, Crane Overload Detector, Cut off limit..

VT1 12 (ZN28B 12) Indoor AC HV Vacuum Breaker Circuit

VT1-12 (ZN28B-12) Indoor AC HV Vacuum Breaker Circuit

    VT1 is ZN28B-12(VT1A-12) Series AC HV Indoor Vacuum Circuit breaker is the product, with three phase, AC 50Hz, rated voltage 12KV. It is up to requirement of "AC HV Circuit breaker" , JB3855-96 "3.6-40.5KV Indoor AC HV Circuit Breaker" .
      VT1 Series has the capability of multi-breaking and faster reclosing for the frequent operation.
      The latest developed patent mechanism CT-T1 is fitted in the product. It can be mounted in the GG1A, XGN series HV Fixed Switchgear by two ways, standing or suspending.
      The product can be used at 4000m elevation level.


Technical parameter of VT1-12 (ZN28B-12) Indoor AC HV Vacuum Breaker Circuit:

NO

NAME

UNIT

VT1-12/T630
(1250)-12.5

VT1-12/T630
(1250)-20

VT1-12/T1250
(1600,2000)-31.5

1

Rated voltage

KV

12

 

 

2

Rated current

A

630 1250

630 1250 1600

1250 1600

3

Rated short-circuit breaking current

KA

50

4

Rated short-circuit making current

KA

42

5

Rated peak withstand current

KA

75

6

Rated short-time withstand current

KA

20

25

31.5

7

Rated short-circuit lasting time

S

20

25

31.5

8

Rated short-circuit breaking current times

TIMES

50

63

80

9

Rated operative sequence

 

50

63

80

10

Rated 1minpower frequency withstand voltage

KV

4

11

Lightning impulse withstand voltage

KV

30

12

The resistance of primary circuit

¦Ì¦¸

OFF-0.3s-ON/OFF-180s- ON/OFF

13

Mechanical Endurance

TIMES

10000

14

Operational capacity

Nm

5

6.25

7.9


Notes for ordering :
      Please indicate while ordering:
      a. Name, type, specifications and quantity;
      b. Rated voltage, rated current and rated short-circuit breaking current;
      c. Functions required and installation way;
      d. Rated operative voltage;
      e. Name and quantity of the accessories;
      f. Please give instruction if you have special requirements.