Indoor AC Metal Closed Ring-net Switch Equipment
Introduction:High Voltage Electric ComponentsMZH68-12ZF(R)/T630-20 Indoor AC Metal Closed Ring-net Switchgear is a new generation minimized vacuum ring-net cabinet which has replaced SF6 gas insulate ring-net cabinet. It is used in 12 kV rated voltage 50Hz ring-net or double power supply radiation power supply systems as the control and protection device for the power energy. It also can be placed in the electrical substation.
MZH68-12ZF(R)/T630-20 Indoor AC Metal Closed Ring-net Switchgear adopts module designed, vertical arranged components and integrated mini vacuum arc chamber as well as spring actuator. It has such features as: compact structure, small volume, simply operation, reliable interlock and long mechanical life span. It can open and close rated load current, short circuit current as well as unload current of the transformer and capacitor current of the wire circuit or capacitors group. It has such interlock functions as: protection, control, measure and reliable misuse prevention.
Main Features and Environmental Conditions -High Voltage Electric Components
1. Altitude: lower than 1000m
2. Environmental temperature: -15°C~+40°C, alpine region: -25°C
3. Relative humidity: daily average value less than 95%, monthly average value less than 90%
4. No conductive dust, corrosion gas or steam
5. No fire or explosion hazard
6. no dramatic shake and the gradient less than 3 degree
Model Meaning
Main Technical Parameters -High Voltage Electric Components[Vacuum Circuit Breaker]
| Order | Item | Unit | Data | |
| 1 | Rated voltage | Kv | 12 | |
| 2 | Rated frequency | A | 630 | |
| 3 | Main gengeratrix current | Wire access cabinet | A | 630 |
| Wire outlet cabinet (combined electrical appliances) | A | 125(maximum) | ||
| 4 | Rated short term current tolerance | KA | 20 | |
| 5 | Rated peak value current tolerance | KA | 50 | |
| 6 | Rated active load breaking current | A | 630 | |
| 7 | Rated closed loop breaking current | A | 630 | |
| 8 | Rated cable charge breaking current | A | 10 | |
| 9 | Rated unload transformer breaking current | KVA | 1250 | |
| 10 | Combined electrical appliance rated breaking exchange current | A | 3150 | |
| 11 | Circuit breaker rated breaking current | KA | 20 | |
| 12 | Imin work frequency voltage tolerance | Towards the ground, vacuum fracture | KV | 42 |
| Isolate fracture | KV | 48 | ||
| 13 | Lightening impact current tolerance | Towards the ground, vacuum fracture | KV | 75 |
| Isolate fracture | KV | 85 | ||
| 14 | Mechanical life span | Vacuum load switch, circuit breaker | Times | 10000 |
| Isolate knife, ground knife | Times | 2000 | ||
| 15 | Load switch | Average Switch closing speed | M/s | 0.6±0.2 |
| Average Switch opening speed | M/s | 1.1±0.2 | ||
| Different periods of three-phase Switch opening and closing | Ms | ≤2 | ||
| Contact Switch closing and bouncing time | Ms | ≤2 | ||
| 16 | Circuit breaker | Average Switch closing speed | M/s | 0.8±0.2 |
| Average Switch opening speed | M/s | 1.2±0.2 | ||
| Different periods of three-phase Switch opening and closing | Ms | ≤2 | ||
| Contact Switch closing and bouncing time | Ms | ≤2 | ||
| 17 | fuse of the combined electrical appliance | Maximum rated current | A | 125 |
| Rated short circuit breaking current | KA | 31.5 | ||
| 18 | Protection rank | IP2X | ||
| 19 | Rated cable charge current | A | 10 | |
| 20 | Contour dimension | Load Switchgear, circuit breaker box | Mm | 1600×900×400 |
| Combined electrical appliance box | Mm | 1600×900×500 | ||
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Complete set switchgear-Power Control System
