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VT2 12 (ZN73 12) Indoor AC HV vacuum circuit breaker

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  • Units in Stock: 100

VT2-12 (ZN73-12) Indoor AC HV vacuum circuit breaker

This kind of product is indoor equipment with three-phase AC of 50HZ and rated voltage of 12KV, can be used to protect and operate the apparatuses in the industrial and mining enterprises, power plants and substations, especially in the workplaces that require no oil, little maintenance and long service life.  VT2-12 can be equipped in the fixed type switchgears, two-layer switchgears and mid-mounted ones.
      VT2 vacuum circuit breaker is fitted with middle-sealed ceramic vacuum arc-chutes. Its contact is made of a material with low closure value and its structure is a horizontal magnetic field in ring.  The characteristics of the VT12 are as follows: large capacity of breaking current, higher insulation level, strong nature of arc extinguishing, and long electric service life.
      VT2 consists of an operative mechanism in the front and an arc-chute at the back. Its main conducting return circuit is three-phase floor type. The vacuum arc-chute is inserted into the insulating sleeve like a tube. Its function cannot be influenced by outside environment, such as heat, humidity and pollution. Its operative mechanism is a kind of torsional spring operated by two ways that is manual energy storage and motor energy storage.

Type designation:

Technical Parameter:

NO
Name
Unit
VT2-12/630(1250,1600)-25
vt2-12/630(1250,1600)-31.5
vt2-12/2000(2500,3150)-40
1
Rated voltage
KV
12
2
Rated current
A
630,1250,1600
630,1250,1600
2000,2500,3150
3
Rated frequency
Hz
50
4
Rated 1min power frequency withstand voltage
KV
42
5
Lightning impulse withstand voltage
KV
75
6
Rated short-time withstand    current
KA
25
31.5
40
7
Rated short-circuit breaking current
KA
25
31.5
40
8
Rated peak withstand current
KA
63
80
100
9
Rated short-circuit making current£¨crest£©
KA
63
80
100
10
Rated short-circuit lasting time
S
4
11
Rated short-circuit breaking times
Times
75
75
30
12
Rated operative sequence
 
Off-0.3s-off/on-180s-off/on
13
Mechanical Endurance
Times
20000
14
The rated voltage/current of closing operation
V/A
200/1.5 100/3
15

The rated voltage/current of opening operation
V/A
200/1.5 100/3
16
Rated voltage of the Secondary circuit
V
220
17
Rated current of the Secondary circuit
A
5
18
Rated voltage of energy storage mechanism
V
AC220,110 DC220,110
19
Energy storage time
S
<15
20
Rated 1min power frequency withstand voltage of the Secondary circuit
V
2000
21
Rated single condenser group breaking current
A
630
22
Rated back-to- back condenser group breaking current
A
400
23
Net weight
Kg
130
24
Dimensions
Mm
650x632x614
25
Package
Mm
820x820x800


Notes for ordering:
      Please indicate while ordering:
      a. Name, model, and specifications, quantity;
      b. Rated voltage, rated current and rated short-circuit breaking current;
      c. Rated operative voltage;
      d. The name and quantity of accessories;
      e. Indicate other special requirements

VT12(ZN85)-40.5 Indoor AC HV Vacuum Circuit Breaker

 VT12(ZN85)-40.5 Indoor AC HV Vacuum Circuit Breaker is mainly suitable for the power system with three-phase AC 50HZ,40.5KV rated voltage£¬to make load current, overload current and short circuit current. It is used for the places with different load and frequent operation. And it is applied to protecting and controlling the apparatus in the industrial and mining business, power plant and substations.

Product feature :
      a.The advanced and effective extinction arc principle is adopted for its high breaking capability and longer service life.
      b.Reasonable arrangement of inductive circuit and operating mechanism, module design, makes its structure more compact.
      c.Reliable interlocking can protect from varieties of malfunction. The insulation level is increased sharply due to applying to compound insulation, and it is never influenced by environment.

Type and designation:

Technical parameter of this AC HV Vacuum Circuit Breaker:

No.
Item
Unit
Data
1.        
Rated voltage
kV
40.5
2.        
Rated current
A
1250
1600
3.        
Rated insulation level
1min power frequency withstand voltage
kV
95
Lightning impulse withstand voltage(peak)
185
4.        
Rated frequency