ZN12 Indoor AC HV Vacuum Circuit breaker
Base on the technology of Germany SIEMENS, ZN12-40.5 Indoor AC HV Vacuum Circuit breaker is developed. It is an indoor switchgear used for the power system with 40.5 kV rated voltage, three-phase AC 50 HZ. The circuit breaker is able to be operated frequently and break the false short circuit current for many times. It is not only suitable for trolley switchgear but for fixed switchgear to protect and control the apparatus in industrial and mining field, enterprises, power plant and substation.
Product feature :
High breaking capability, long endurance.Adopting integration spring operating mechanism, it is simple in structure, small in size and reliable in performance.The main galvanic circle and operating mechanism is in front and back arrangement and they are flexible and easily mounted.It is simple and reliable with mechanical and electrical interlocking.It adopts plateau design and it has good insulation level.
Type and designation :
|
No.
|
Name
|
Unit
|
Technical parameter
|
|
1.
|
Rated voltage
|
kV
|
40.5
|
|
2.
|
Rated current
|
A
|
1250,1600,2000,2500
|
|
3.
|
Rated short circuit breaking current
|
kA
|
25
|
31.5
|
|
4.
|
Peak withstand current
|
63
|
80
|
|
5.
|
Short time current (4s)
|
25
|
31.5
|
|
6.
|
Rated short circuit making current
|
63
|
80
|
|
7.
|
Rated short circuit breaking times
|
Times
|
30
|
30
|
|
8.
|
Operating sequence
|
|
O-0.3s-CO-180s-CO
|
|
9.
|
Lightning impulse withstand voltage
|
kV
|
185
|
|
10.
|
Rated short time power frequency withstand voltage(1min)
|
95
|
|
11.
|
Closing time
|
ms
|
<=90
|
|
12.
|
Opening time
|
<=70
|
|
13.
|
Energy stored time
|
s
|
<=15
|
|
14.
|
Mechanical endurance
|
times
|
10000
|
|
15.
|
Rated current breaking times
|
10000
|
|
16.
|
Energy stored electric machine rated frequency
|
W
|
275
|
|
17.
|
Energy stored electric machine rated voltage
|
V
|
DC110 AC/DC220
|
|
18.
|
Making electromagnet rated voltage
|
DC110 DC220
|
|
19.
|
Making electromagnet rated resistance
|
¦¸
|
57.7 247
|
|
20.
|
Making electromagnet rated current
|
A
|
DC1.91 DC0.89
|
|
21.
|
Over current release current
|
5
|
|
22.
|
Auxiliary switch rated current
|
AC10 DC5
|
|
23
|
Contact moving distance
|
mm
|
25(+ or -)2
|
|
24
|
Contact travel
|
8(+ or -)2
|
|
25
|
Closing speed
|
m/s
|
1.0 to 1.8
|
|
26
|
Opening speed
|
m/s
|
1.0 to 1.8
|
|
27
|
Contact closing bouncing time
|
ms
|
<=2
|
|
28
|
Phase to phase central distance
|
mm
|
350,400,460
|
|
29
|
asynchronization of making contact
|
ms
|
<=2
|
|
30
|
Each phase main circuit resistance
|
¦Ì¦¸
|
<=40
|
|
31
|
Wear thickness allowance of moving contact and static contact
|
mm
|
<=3
|
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