ZN28A-12 Indoor AC HV Vacuum Circuit breaker
ZN28A-12 Indoor AC HV Vacuum Circuit Breaker is an indoor equipment of three phase AC 50HZ, rated voltage 10KV, which is mainly mounted in the fixed switchgear to protect and control the apparatuses in the industrial and mining enterprises, power plants and substations, especially in the workplaces of frequent operation and reconstruction project of old cubicle. It is equipped with CD10, CD17 electromagnetic operative mechanism or CT8, CT19 spring operative mechanism.
Feature of Indoor High VoltageVacuum Circuit Breaker
Type designation:
Technical parameter:
|
NO
|
Name
|
Unit
|
ZN28A-
12/630
(1250)-
12.5
|
ZN28A-
12/630
(1250)-
20
|
ZN28A-
12/1250
(1600,
2000)-25
|
ZN28A-
12/1250
(1600,2000)-31.5
|
ZN28A-
12/2000
(2500,3150)-40
|
|
1
|
Rated voltage
|
KV
|
12
|
12
|
12
|
12
|
12
|
|
2
|
Rated current
|
A
|
630 1250
|
630 1250
|
1250
1600
2000
|
1250
1600
2000
|
2000
2500
3150
|
|
3
|
Rated short-circuit breaking current
|
KA
|
12.5
|
20
|
25
|
31.5
|
40
|
|
4
|
Rated short-circuit making current
|
KA
|
31.5
|
50
|
63
|
80
|
100
|
|
5
|
Rated peak withstand current
|
KA
|
31.5
|
50
|
63
|
80
|
100
|
|
6
|
Rated short-time withstand current
|
KA
|
12.5
|
20
|
25
|
31.5
|
40
|
|
7
|
Rated short-time withstand time
|
S
|
4
|
4
|
4
|
4
|
4
|
|
8
|
Breaking times of rated short-circuit
|
Times
|
30
|
30
|
30
|
30
|
30
|
|
9
|
Rated operative sequence
|
|
Off-0.3s-on/off-180s-on/off
|
|
10
|
Rated 1min power frequency withstand voltage
|
KV
|
42
|
|
11
|
Lightning impulse withstand voltage
|
KV
|
75
|
|
12
|
Mechanical Endurance
|
Times
|
10000
|
Notes for ordering:
a. Type,specifications, quantity and product;
b. The description, specifications and quantity of other accessories.
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