Standards
GB3906-2006 "3~35kV AC Metal-enclosed Switchgear"
GB11022-89 "General Technical Requirements for High Voltage
Switchgear"
IEC60298 "AC metal-enclosed switchgear and control equipment with
rated voltage above 1kV and below 50kV"
DL404-97 "Technical Conditions for Ordering Indoor AC High Voltage
Switchgear"
Use environment
Normal environmental conditions
1. The upper limit of ambient air temperature: +40℃, the lower
limit: -10℃, and the daily average temperature does not exceed 35℃;
2. The altitude does not exceed 1000m;
3. The daily average relative humidity is not more than 95%, and
the monthly average is not more than 90%;
4. The earthquake intensity does not exceed 8;
5. The daily average value of water vapor pressure does not exceed
2.2Kpa, and the monthly average value does not exceed 1.8kpa;
6. There is no fire, explosion hazard, severe pollution, chemical
corrosion and severe vibration.
Special working conditions
When used under normal environmental conditions beyond the
specified, the user and the manufacturer shall negotiate.
Technical data
| Items | Unit | Data |
| Voltage | KV | 40.5 |
| Frequency | Hz | 50 |
| Current | A | 1250,1600,2000 |
| Short-circuit Breaking Current | KA | 25,31.5 |
| Making Current (Peak) | KA | 63,80 |
| 4s Thermal Stability Current | KA | 25,31.5 |
| Dynamic Current (Peak) | KA | 63,80 |
| Insulation Level | 1min Power Frequency Withstand Voltage (r.m.s) | KV | 95 |
| Lightning Impulse Withstand Voltage (Peak) | KV | 185 |
| 1min Power Frequency Voltage Across the open gap (r.m.s) | KV | 118 |
| Lightning Impulse Withstand Voltage Across the open gap (Peak) | KV | 215 |
| Enclosure Protection Class | | Enclosure IP4X, Between Compartments IP2X |
| Enclosure Dimension (Width*Depth*Height) | mm | 1400*2800*2600
1600*2800*2600 |
| Type of Circuit Breaker | | VCB: ZN85-40.5
SF6 Circuit Breaker |
*Note: order switchgear should provide SLD(Single-line diagram) by
customer
Main components characteristics:
VS1-40.5 Indoor Vacuum Circuit Breaker
Rating voltage: 40.5kV
Rating current: 630 1250 1600 2000 2500A
Rating short circuit breaking current: 20 25 31.5KA
Mechanical life: no less than 20,000 times
VS1-40.5 Technical data
| Items | Unit | Date |
| voltage |
KV | 40.5 |
| short-time power frequency withstand voltage (1min) | 95 |
| lightning impulse withstand voltage (peak) | 185 |
| frequency | Hz | 50/60 |
| current | A | 1250 1600 2000 2500 4000 |
| short-circuit drop-out current | KA | 25 31.5 |
| short-time withstand current | 25 31.5 |
| short-time continual time | s | 4 |
| peak withstand current | KA | 63 80 |
| short-circuit closing current | 63 80 |
| single/ back-to-back capacitor bank drop-out current | A | 630/400 |
| Opening time (rated volt.) | ms | 35~60 |
| Closing time (rated volt.) | 50~100 |
| Mechanical life | times | 20000 |
| break times for rated short drop-out current | s | 20 |
| operation voltage | V | AC110/220 DC110/220 |
| current of power storing motor | W | 230 |
| Average opening speed | m/s | 1.6~2.0 |
| Average closing speed | 0.5~0.8 |
| operation procedure | | opening-0.3s-closing opening-180s-closing opening |
Knkong Electric 33KV switchgear has served the international market
for over the past 10 years.
