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CKFZ-12 Indoor Vacuum Load Switch
- 1.Stable insulation performance：Vacuum bubble installed inside the ring network resin insulation cylinder.
- 2.High protection level：Interlocking mechanism, automatically meeting the "five prevention" requirements.
- 3.Good suitability：Vacuum switch, capable of breaking 20kA short-circuit current, combined with protective devices, can achieve various protection functions.
►Overview
CKFZ-12/630-20 indoor high-voltage AC vacuum load switch (hereinafter referred to as "load switch") and CKFZR-12D/T125-31.5 vacuum load switch fuse combination device (hereinafter referred to as "combination device") are indoor high-voltage distribution switches with three-phase AC 50Hz and rated voltage of 12kV developed by Comking in combination with advanced technology. They can be used for industrial and mining enterprises, high-rise buildings, residential communities, campuses, hospitals, docks, and other power distribution systems are used as indoor three-phase ring network power supply equipment or terminal power supply equipment.
►Product features
1.Stable insulation performance：Vacuum bubble installed inside the ring network resin insulation cylinder.
2.High protection level：Interlocking mechanism, automatically meeting the "five prevention" requirements.
3.Good suitability：Vacuum switch, capable of breaking 20kA short-circuit current, combined with protective devices, can achieve various protection functions.
4.Safe and stable：Load switch and cabinet door mechanical interlocking, with obvious disconnection points and high breaking capacity.
►Technical parameter
| Specifications | Unit | Data | ||||
| Rated voltage | kV | 12 | ||||
| Rated lightning impulse withstand voltage (peak) | kV | 75/85 | ||||
| Rated power frequency withstand voltage（1min） | kV | 42/48 | ||||
| Rated frequency | Hz | 50 | ||||
| Rated short-circuit breaking current | kA | 20、25 | 31.5 | 40 | ||
| Rated current | A | 630 | 1250 | 1600 | 1250 | 1600 |
| 1250 | 2000 | 2500 | 2000 | 2500 | ||
| 3150 | 3150 | 4000 | ||||
| Rated short-time withstand current | kA | 20、25 | 31.5 | 40 | ||
| Rated peak withstand current | kA | 50、63 | 80 | 100 | ||
| Rated short-circuit making current (peak) | kA | 50、63 | 80 | 100 | ||
| Secondary circuit power frequency withstand voltage (min) | V | 2000 | ||||
| Rated operating sequence | / | 0-0.3s-C0-180s-C0 | ||||
| Rated short-circuit duration | S | 4 | ||||
| Rated single/back-to-back capacitor bank breaking current |
A | 630/400 | 800/400 | |||
| Rated capacitor bank making inrush current | kA | 12.5(frequency less than 1000Hz) | ||||
| Mechanical endurance | Cycle | 10000 | ||||
| Rated number of short-circuit current interruptions | Cycle | 30 | 20 | |||
| Accumulated thickness of wear allowed for dynamic and static contacts | mm | 3 | ||||
| Rated closing and opening operating voltage | V | AC220/110DC220/110 | ||||
| Contact opening distance, overtravel | / | Opening distance 10±1; Overtravel 3±1 | ||||
| At rated operating voltage: closing and opening time | / | Closing ≦70; Opening ≦50 | ||||
| Contact closing bounce time | ms | 2 | 3 | |||
| Three phase closing and opening synchronization | / | 2 | ||||
| Average opening speed | m/s | 0.9~1.3 | ||||
| Average closing speed | m/s | 0.4~0.8 | ||||
| Main circuit resistance | μΩ | 630A:50 1250A:45 1600, 2000A:40 Above 2500A:30 |
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Note: H represents a vacuum switch with high breaking capacity
Click Indoor vacuum load switch supplier to learn more about the products.
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