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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..

ZN12 Indoor AC HV Vacuum Circuit breaker

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