Product Overview
The ZN12-40.5 series is an indoor high-voltage vacuum circuit breaker designed for three-phase AC 50Hz systems with a rated voltage of 40.5kV. Incorporating technology introduced from Siemens AG, Germany, it delivers high power performance and exceptional reliability for frequent operation and important load switching.
The breaker serves as the main switching device compatible with switchgear series like XGN17-40.5, KYN1-35, and GBC-35. It features a spring-energy storage operating mechanism (charged via AC/DC or manual) and is available in both removable truck and fixed-mounted configurations.
Transparent view of the complete truck-mounted circuit breaker structure.
Technical Specifications
|
No. |
Item |
Unit |
Parameter |
||||
|
I |
II |
III |
I |
II |
|||
|
1 |
Rated Voltage |
kv |
12 |
12 |
12 |
40.5 |
40.5 |
|
2 |
Rated Current |
A |
1250 |
1600 |
2000 |
1600 |
2000 |
|
3 |
Rated Short-Circuit Breaking Current |
KA |
31.5 |
31.5 |
31.5 |
25 |
31.5 |
|
4 |
Rated Operating Sequence |
O-0.3s-CO-180s-CO |
|||||
|
5 |
Rated Lightning Impulse Withstand Voltage (Full Wave) |
KV |
75 |
185 |
|||
|
6 |
Rated Short-Duration Power-Frequency Withstand Voltage (1min) |
KV |
42 |
95 |
|||
|
7 |
Closing Time |
ms |
≤75 |
50~85 |
|||
|
8 |
Opening Time |
ms |
≤60 (or ≤50) |
40~85 |
|||
|
9 |
Mechanical Endurance |
times |
20000(1~1V)10000(V~X) |
120000 |
|||
|
10 |
Rated Number of Operations at Rated Current |
times |
20000(1~1V)10000(V~X) |
≥10000 |
|||
|
11 |
Motor Power for Spring Charging |
W |
275 |
275 |
|||
|
12 |
Rated Voltage of Motor for Spring Charging |
V |
AC/DC 110,220 |
AC/DC 220,110 |
|||
|
13 |
Spring Charging Time |
S |
≤75 |
≤15 |
|||
|
14 |
Rated Voltage of Closing Coil |
V |
AC/DC 110,220 |
AC/DC 220,110 |
|||
|
15 |
Rated Voltage of Opening Coil |
V |
AC/DC 110,220 |
AC/DC 220,110 |
|||
|
16 |
Rated Voltage of Energized Shunt Release |
V |
AC/DC 110,220 |
AC/DC 220,110 |
|||
|
17 |
Rated Voltage of Closing Interlock Device |
V |
AC/DC 110,220 |
AC/DC 220,110 |
|||
|
18 |
Rated Voltage of Undervoltage Release |
V |
AC/DC 110,220 |
AC/DC 220,110 |
|||
|
19 |
Rated Current of Overcurrent Release |
A |
5 |
5 |
|||
|
20 |
Rated Current of Auxiliary Switch |
A |
AC10/ DC 10 |
DC 10 |
|||
|
21 |
Contact Travel |
mm |
11±1 |
20±2 |
|||
|
22 |
Contact Overtravel |
mm |
8±2 |
5±1 |
|||
|
23 |
Closing Speed |
m/s |
0.6~1.8 |
0.8~1.4 |
|||
|
24 |
Opening Speed |
m/s |
1.0~1.8 |
1.1~1.8 |
|||
|
25 |
Resistance per Phase |
μΩ |
≤35 |
≤45 |
|||
Core Advantages
- Proven Siemens Technology: Incorporating technology introduced from Siemens AG, Germany, ensuring high power performance and exceptional reliability for frequent operation and important load switching.
- Seamless Switchgear Integration: Fully compatible with XGN17-40.5, KYN1-35, and GBC-35 switchgear. Available in both removable truck and fixed-mounted configurations for easy retrofit.
- Fast & Reliable Operation: Spring charging time ≤15s for rapid readiness. Rated short-circuit breaking current up to 31.5kA with opening speeds of 1.1–1.8m/s for reliable fault clearing.
- Extended Lifespan: Mechanical endurance of 12,000 operations. Main circuit resistance ≤45μΩ and contact travel of 20±2mm with overtravel of 5±1mm ensure long-term stability.
Model Designation
Z N 12 - 40.5 / □ - □
Z -- Vacuum Circuit Breaker
N -- Indoor
12 -- Design Serial Number
40.5 -- Rated Voltage (kV)
□ -- Rated Current (A)
□ -- Rated Short-Circuit Breaking Current (kA)
Hot Tags: zn12-40.5 series indoor high voltage vacuum circuit breaker, China zn12-40.5 series indoor high voltage vacuum circuit breaker manufacturers, suppliers, factory, indoor vacuum circuit breaker, ZN85 40 5 Series Indoor High Voltage Vacuum Circuit Breaker, ZN63 VS1 24 Series Indoor AC High Voltage Vacuum Circuit Breaker, ZN63 VS1 12 Series Indoor High Voltage Vacuum Circuit Breaker, ZN63 VS1 12 Series Indoor Epoxy Cast Pole Vacuum Circuit Breaker, ZN28 12 Series Indoor High Voltage Vacuum Circuit Breaker