Product Overview
KYN28A-12 is indoor 12kV armored withdrawable switchgear. It features independent compartment layout and five-prevention interlock system, compatible with mainstream vacuum circuit breakers via removable trolley structure for easy maintenance. Widely used in factories, power stations and distribution rooms for power distribution and circuit protection.
Model and Meaning
Service Conditions
- Ambient temperature: the highest temperature +40 ℃, the lowest temperature −15 ℃ (under special process, up to −45 ℃);
- Ambient humidity: daily average <95%. Monthly average ≤ 90%;
- Altitude: less than 1000m;
- Anti-seismic; the seismic intensity does not exceed 8;
- The surrounding air should be free of corrosive or flammable gas, water vapor and other obvious pollution;
- No serious pollution and frequent severe vibration. Strict design under severe conditions meets Class 1 requirements;
- When using beyond the normal environmental conditions specified in GB3906, the user and the manufacturer negotiate.
Note: 1 When the relative humidity is greater than 70%, the electric heater should be turned on. 2 Where the altitude is more than 1000m, it shall be treated according to JB/Z102−71.
Technical Parameters
| Project | Unit | Parameter | ||
| Rated voltage | kV | 3.6,7.2,12 | ||
| Rated frequency | Hz | 50 | ||
| Circuit breaker rated current | A | 630, 1250, 1600, 2000, 2500, 3150 | ||
| Switch cabinet rated current | A | 630, 1250, 1600, 2000, 2500, 3150 | ||
| Rated dynamic current(4s) | kA | 16, 20, 25, 31.5, 40, 50 | ||
| Rated steady current(peak) | kA | 40, 50, 63, 80, 100, 125 | ||
| Rated short-circuit breaking current | kA | 16, 20, 25, 31.5, 40, 50 | ||
| Rated short circuit closing current(peak) | kA | 40, 50, 63, 80, 100, 125 | ||
| Rated insulation level | 1 min power frequency withstand voltage | kV | 24 | 32 42 |
| Light impulse withstand voltage | 40 | 60 75 |
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| Protection level | IP2X for enclosure IP4X, isolation compartment, and circuit breaker compartment door | |||
Switchgear Dimensions
