Switchgear
MK Engineering Works is a leading manufacturer and supplier of Low Voltage (LV) and Medium Voltage (MV) electrical panels. With a commitment to excellence and a track record of delivering top-quality electrical solutions, MK Engineering plays a pivotal role in powering various industries and infrastructure projects.
LV Panels Products
- Generator Synchronization panel
- ATS/AMF panel
- Main LT panel
- Distribution Board (Concealed/Wall Mounted/Floor standing)
- Automatic and Manual Power factor control and improvement panel
- Monitoring and Metering panel
- MCC panel
MV Panels Products
- 11kV VCB Incoming Panel
- 11kV VCB Outgoing Panel
- 11kV VCB BUS Coupler panel
- 11kV VCB WAPDA Industrial Metering / Protection Panel (As per WAPDA specs)
Components of Metal-Clad Switchgear Panels
| Sr. No | Item Description | Incoming Panel | Outgoing Panel | Bus-Coupler Panel | Capacitor Control panel | Consumer Panel | Industrial Panel | Ring main Panel |
|---|---|---|---|---|---|---|---|---|
| 1 | Circuit Breaker | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2 | Load Break Switch | - | - | 2 | - | - | - | 2 |
| 3 | Earthing Switch | - | 1(i) | - | 1(i) | 1(i) | - | - |
| 4 | Single Phase, 2-core CT for over-current protection and metering | 3 | 3 | - | 3 | - | - | 3 |
| 5 | Single Phase, 1-core CT for over current protection | - | - | - | - | 3 | 3 | 3 |
| 6 | Single Phase, 1-core CT for metering | - | - | - | - | 3 | 3 | 3 |
| 7 | Single Phase, 1-core CT for Differential Protection | 3 | - | - | - | - | - | - |
| 8 | Single phase voltage transformer | 3 | - | - | - | 3 | 3 | 3 |
| 9 | Surge Arrestors | - | 3 | - | 3 | 3 | - | - |
| 10 | Over-current and earth fault relay | 1(ii) | 1(ii) | - | 1(iii) | 1(ii) | 1(iv) | 1(iv) |
| 11 | Two step capacitor unbalance detection relay | - | - | - | 1(iii) | - | - | - |
| 12 | Under voltage/over voltage relay | - | - | - | 1 | - | - | - |
| 13 | DC trip circuit supervision relay (TCS) | 2 | 2 | - | 2 | 2 | 1(v) | 1(v) |
| 14 | Trip & Lockout relay | - | - | - | 1 | - | - | - |
| 15 | Energy Meter | 1 | 1 | - | - | 1 | 1 | 1 |
| 16 | Ammeter | 3 | 3 | - | 1 | 1 | 3 | 3 |
| 17 | Voltmeter 0-15kV with 7 position selector switches | 1 | - | - | - | 1 | 1 | 1 |
| 18 | Power factor meter | 1 | 1 | - | 1 | 1 | 1 | 1 |
| 19 | Hooter and its acknowledgment | 1 | - | - | 1 | - | - | - |
| 20 | Power Quality analyzer | 1(i) | - | - | - | 1(i) | - | - |
i. If required by Purchaser/end user
ii. Three phase four element over current & earth fault relay shall be used as per clause 12.5
Breaker Characteristics and Rating
| 1 | Nominal Voltage | 11kV | ||||||||||
| 2 | Rated Voltage | 12KV | ||||||||||
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| 4 | Rated frequency | 50Hz | ||||||||||
| 5 | Rated auxiliary circuit DC voltage | 110V | ||||||||||
| 6 | Rated short circuit breaker current | 25KA | ||||||||||
| 7 | Rated Peak withstand current | 63KA | ||||||||||
| 8 | Rated short circuit making current | 63KA | ||||||||||
| 9 | Duration of short circuit | 1 sec | ||||||||||
| 10 | First pole to clear factor | 1.5 | ||||||||||
| 11 | Rated TRV (Peak) for terminal fault | 20.6KV | ||||||||||
| 12 | Rated TRV (Peak) for out of phase | 30.6KV | ||||||||||
| 13 | One-minute AC withstand voltage | 36KV | ||||||||||
| 14 | Lightning Impulse withstand voltage | 95KV | ||||||||||
| 15 | Single capacitor bank breaking current | As per IEC | ||||||||||
| 16 | Rate of rise of recovery voltage (RRRV) | As per IEC | ||||||||||
| 17 |
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| 18 | Beaker time | As per IEC | ||||||||||
| 19 | Dead time | As per IEC | ||||||||||
| 20 | Opening time | As per IEC | ||||||||||
| 21 | Closing time | As per IEC | ||||||||||
| 22 | Spring charging time | ≤15sec | ||||||||||
| 23 | Close-Open time | As per IEC | ||||||||||
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