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
|
|
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