B21, China Town Mall, Midrand
The KYN28A-12 is a removable AC metal-enclosed switchgear designed for high voltage applications. With its robust construction and high-performance components, this switchgear provides reliable protection and control for electrical systems. It is ideal for use in outdoor applications such as substations and power plants.
KYN28A-12(Z) armored removable AC metal closed switchgear (also known as GZS1 switchgear) is suitable for 3.6-40.5 kV three-phase AC 50Hz power system, which is applied to receive and distribute electric energy, and control, protect and monitor the circuit.
KYN28A-12(Z) type armored removable AC metal closed switch cabinet can prevent the following maloperation: maloperation of circuit breakers, push-pull closing with load, electrified closing of grounding switches. And prevent grounding switches from sending electricity when they are in the grounding position. The switch cabinet can be equipped with joint-venture vacuum circuit breakers such as VD4, HVX and 3AE, as well as domestic VS1 vacuum circuit breakers.
Technical Parameter
| No. | Name | Unit | Data | |
| 1 | Rated voltage (maximum operating voltage) | kV | 3.6 7.2 12 40.5 | |
| 2 | Rated frequency | Hz | 50 | |
| 3 | Rated current of circuit breaker | A | 630 1250 1600 2000 2500 3150 4000 | |
| 4 | Rated current of switch cabi-net | A | 630 1250 1600 2000 2500 3150 4000 | |
| 5 | Rated heat stable current (4s) | kA | 16 20 25 31.5 40 50 | |
| 6 | Rated dynamic stable current (peak) | kA | 40 50 63 80 100 125 | |
| 7 | Rated short circuit breaking current | kA | 16 20 25 31.5 40 50 | |
| 8 | Rated short circuit closing current (peak) | A | 40 50 63 80 100 125 | |
| 9 | Rated insulation level | 1min power frequency withstandvoltage | kV | 24 32 42 |
| Lightning shock withstand voltage | kV | 40 60 75 | ||
| 10 | Protection level | The shell is IP4X, and when the compartment and circuit breaker door are opened, it is IP2X |
