Home > Products > Vacuum Circuit Breaker&Vacuum Contactor > ZN28 12KV Draw-out Vacuum Circuit Breaker
ZN28 12KV Draw-out Vacuum Circuit Breaker
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Product Details
| Place of Origin | Zhejiang, China | Brand Name | hossin | |
| Model Number | ZN28-12C | Type | High Voltage | |
| Poles Number | 3 |
Product Description
ZN28-12C Seires of Withdrawable HV Indoor Vacuum Circuit Breaker
ZN28(A)-12 series indoor high-voltage vacuum circuit breaker is a kind of three-phase indoor high-voltage switchgear of rated voltage 12kV and AC 50Hz, mainly installed in metal enclosed Kai counter, applicable to industrial and mining enterprises, power stations and transformer substations, used for control and protection of electric facilities. It is suitable for occasions where require frequent operation.
1.Ambient temperature: -10°C~+40°C.
2.The height above sea level: ≤ 1000 m (Not including special requirements).
3. Relative humidity: the average humidity of a day should be no more than 95%,the average humidity of a month should be no more than 90%.
4. Saturated vapor pressure: the average pressure of a day should be no more than 2.2kPa; the average pressure of a month should be no more than 1.8Kpa.
5. Earthquake intensity: not exceed 8 degrees.
6. It should be installed in places without fire, explosion, serious filth,
and chemical erosion and violent vibration.
Main Technical Parameter
Item | Unit | Parameter | ||||||||
Rated Voltage | kV | 12 | ||||||||
Rated Current | A | 630,1000 | 630,1000 | 1250,1600 | 1600,2000 | |||||
1250 | 1250 | 2000,2500 | 3150 | |||||||
Rated Short-circuit Breaking Current | kA | 20 | 25 | 31.5 | 40 | |||||
Rated Short-circuit Making Current (Peak) | kA | 50 | 63 | 80 | 100 | |||||
Rated Peak Withstand Current | kA | 50 | 63 | 80 | 100 | |||||
Rated Short-time Withstand Current | kA | 20 | 25 | 31.5 | 40 | |||||
Rated Insulation Level | Power Frequency Withstand Voltage (Rated Breaking Before and After) | kV | 42 (Break 48) | |||||||
Lightning Impulse Withstand Voltage (Rated Breaking Before and After) | kV | 75 (Break 84) | ||||||||
Rated Operating Sequence |
| O-0.3s-C O-180s-CO | ||||||||
Mechanical Life | times | 10000 | ||||||||
Rated Short-circuit Current Breaking Times | times | 50 | ||||||||
Rated Closing Voltage of Operator (DC) | V | 110, 220 | 220 | |||||||
Rated Closing Current of Operator (DC) | A | 71 | 128 | |||||||
Rated Opening Voltage of Operator (DC) | V | 110, 220 | ||||||||
Rated Opening Current of Operator (DC) | A | 3.0,1.5 | ||||||||
Clearance Between Open Contacts | mm | 11±1 | ||||||||
Over travel of Contacts | mm | 4±1 | ||||||||
Three-phase Opening/Closing Synchronization | ms | ≤2 | ||||||||
Closing Bouncing Time | ms | ≤2 | ||||||||
Average Opening Speed (excluding Oil Bumper) | m/s | 1.2±0.3 | ||||||||
Average Closing Speed | m/s | 0.6±0.2 | ||||||||
Opening Time | Highest Operating Voltage | s | ≤0.06 | |||||||
Lowest Operating Voltage | s | ≤0.08 | ||||||||
Closing Time | s | ≤0.2 | ||||||||
Main Loop Resistance of Each Phase | μΩ | ≤40 | ≤20 | |||||||
Total Thickness of Permissible Wear of Moving and Static Contacts | mm | 3 | ||||||||
Oil Bumper Buffer Trip | mm | 10 | ||||||||
To order the vacuum circuit breaker, please let us know below info:
1. Rated Voltage
2. Rated Current
3. Rated Breaking Current
4. Fixted type or Draw-out Type
Contact Us
- Yueqing Hossin Electrical Co., Ltd.
- Contact nameCaren Hong Chat Now
- Phone86-577-15825683611
- AddressNiqian Village, Xiangyang Town, Yueqing
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