Indoor High Voltage Ground Switch [Vacuum Circuit Breaker]
Introduction: Indoor High Voltage Ground SwitchMZD66-12/40 (original model is JN15-12/40 in order to distinguish it from the mass market our company renamed it as MZD66-12/40) Indoor High Voltage Ground Switch is a new type of international advanced ground switch of our company which is designed and developed on the basis of ESI ground switch. It is of combination structure. Its performance meets GB1985-89"AC High Voltage Isolated Switch and Ground Switch" and EC129 standards. It is applied to 3~10 kV three-phase AC 50(60) Hz power system. It has certain open and close ability to protect the other electrical devices in the Switchgear from damage. It can be used with various high voltage Switchgeares as the ground protection for the maintenance of high voltage electrical devices.
Chief Features & Terms of Use - High Voltage Ground Switch
1. Advanced design, indoor load switch
2. Simple structure, easy to install and adjust
3. Rapid part and close speed
4. Environmental temperature: maximum temperature +40°C, minimum temperature -10°C
5. Altitude: Lower than 1000m
6. Humidity: daily average relative humidity <95%, monthly average relative humidity < 90%
7. Earthquake intensity smaller than 8 degree.
8. Contamination grade: grade Ⅱ
Order Information
1. please state product model, distance, with or without power supply display device (displayer model) when make a ground switch order.
2. does soft connect length need to be extended. (Regular L=240)
3. special requirements please consult with our company.
Model Meaning
Technical Parameters - High Voltage Ground Switch [Vacuum Circuit Breaker]
| Item | Unit | Data | ||
| Rated voltage | KV | 12 | ||
| Rated short term current tolerance (thermal stable) | KV | 40 | ||
| Rated short circuit duration time | S | 4 | ||
| Rated short circuit closing current | KA | 100 | ||
| Rated peak value current tolerance (dynamic stable) | KA | 100 | ||
| Rated insulation level | Rated short term work frequency voltage tolerance | KV | Opposite and alternated | 42 |
| Rated lightening impact voltage tolerance | 75 | |||
| Mechanical life span | Times | 2000 | ||
Diagram of copper-tube row terminal
Diagram of whole installation
| Product Model | E | F | G | H | D |
| MZD66-12/40-210 | 210 | 50 | 185 | 655 | 516 |
| MZD66-12/40-220 | 220 | 50 | 185 | 675 | 536 |
| MZD66-12/40-230 | 230 | 50 | 85 | 695 | 556 |
| MZD66-12/40-250 | 250 | 50 | 185 | 735 | 596 |
| MZD66-12/40-275 | 275 | 50 | 210 | 810 | 646 |
MZD66-12 Indoor High Voltage Ground Switch Back
Complete set switchgear-Power Control System
