Overview
KYN28-24 (Z)(GZS1) Withdrawable Metal-clad Switchgear (here-inafter referred to as “switchgear”) is suitable for three-phase AC 50Hz power system, used to receive and distribute electric energy and control, protect and monitor circuits.
This product complies with the following standards: GB3906-2006 “3.6-40.5kV AC metal-enclosed switchgear and controlgear”, GB/T11022 “Common technical re-quirements for high-voltage switchgear and controlgear standards”, IEC62271:200 “Rated voltage 1kV above 52 below AC metal-enclosed switchgear and control-gear”, DL/T404 “Technical conditions for ordering indoor AC high-voltage switch-gear”.
Operating Conditions
1. Ambient temperature: -15℃ ~+40℃;
2. Altitude: 1000m;
3. Relative humidity: daily average 95%, monthly average 90%;
4. Seismic resistance: 8 magnitude;
5. Occasions without flammable and explosive matter, without corrosive chemical and frequent severe vibration, without strong shake;
6. When used under normal environmental conditions exceeding those specified in GB3906, the user and the manufacturer shall negotiate.
Model and meaning
Technical Specification
| Item | Unit | Data | ||
| Rated voltage | KV | 24 | ||
| Rated frequency | Hz | 50 | ||
| Rated current(circuit breaker) | A | 630/ 1250/ 1600/ 2000/ 2500/ 3150/4000 | ||
| Rated current(switchgear) | A | 630/1250/ 1600/ 2000/ 2500/ 3150/4000 | ||
| Rated short-time withstand current (4s) | KA | 16/ 20/ 25/ 31.5/ 40/ 50 | ||
| Rated peak withstand current※ | KA | 40/ 50/ 63/ 80/ 100/ 125 | ||
| Rated short-circuit breaking current | KA | 16/ 20/ 25/ 31.5/ 40/ 50 | ||
| Rated short-circuit making current※ | KA | 40/ 50/ 63/ 80/ 100/ 125 | ||
| Rated insulation level | 1min.P.F. withstand voltage | Between Phases | KV | 65 |
| Phases to Ground | 79 | |||
| Lightning impulse withstand voltage (peak) | Between Phases | KV | 125 | |
| Phases to Ground | 145 | |||
| Protection class | Enclosure: IP4X, IP2X (VCB Door opened) | |||
Basic Structure Diagram of Switchgear
