The KYN28-24 Armored Removable AC Metal-Enclosed Switchgear is a type of medium-voltage power distribution equipment developed for three-phase AC systems with a rated voltage of 24kV and a frequency of 50Hz. This indoor switchgear unit integrates control, protection, and monitoring functions. It is structured with a metal-clad, modular design and features a removable vacuum circuit breaker housed in a separate compartment. This setup helps support efficient electrical distribution across various industrial, commercial, and infrastructure environments.
Product Advantages
Improved Operational Safety
Fully enclosed metal housing enhances user protection by reducing exposure to live parts.Each compartment is separately grounded and isolated to help prevent arc flash spread.Built-in interlocking systems assist in managing safe operation and minimizing risks.
Reliable System Performance
The switchgear utilizes a vacuum circuit breaker known for its stable interrupting capabilities.Compartmentalized structure isolates critical functional areas, aiding in limiting fault impact.Components are selected based on durability and consistent performance under various operating conditions.
Product Features
Compartmental Metal-Clad Construction
The unit is divided into compartments for the circuit breaker, busbar, cable, and auxiliary control systems.Independent barriers reduce thermal effects and enhance electrical isolation.
Withdrawable Vacuum Circuit Breaker
The vacuum circuit breaker is installed on a trolley-type handcart, which can be smoothly inserted or withdrawn.The design supports three defined positions: connected, test, and isolated, enabling flexible operation and safety.
Logical Mechanical Interlocking System
The interlock system is arranged to follow a predefined sequence, supporting safe insertion, withdrawal, and compartment access.It helps prevent misoperation under load or when grounded.
Product Applications
Electric Power Substations
Used in medium-voltage substations for energy distribution, load control, and fault isolation.Helps maintain continuity of service and fault protection in regional power grids.
K/①Y/②N/③28/④24/⑤(Z)/⑥
| ① | Armor |
| ② | Mobile type |
| ③ | Usage conditions: (indoor) |
| ④ | Design serial number |
| ⑤ | Rated voltage (kV) |
| ⑥ | Vacuum circuit breaker |
| Name | Unit | Parameter | ||
| Rated voltage | KV | 24 | ||
| Rated frequency | Hz | 50 | ||
| Rated current of circuit breaker | A | 630、1250、1600、2000、2500、3150 | ||
| Rated current of switchgear | A | 630、1250、1600，2000、2500、3150 | ||
| Rated dynamic stable current（4s） | KA | 20、25、31.5 | ||
| Rated stable current（peak） | KA | 50、63、80 | ||
| Rated short-circuit breaking current | KA | 20.25、31.5 | ||
| Rated short-circuit making current（peak） | KA | 50、63、80 | ||
| Rated insulation level | 1min Power frequency withstand voltage | Between poles，between poles and ground | KV | 65 |
| Between fracture surfaces | KV | 79 | ||
| Lightning impulse withstand voltage（peak） | Between poles，between poles and ground | KV | 125 | |
| Between fracture surfaces | KV | 145 | ||
| Protection class | When the enclosure IP4X，isolation barrier，and circuit breaker room door are open，it is IP2X | |||
A. Bus compartment
B. Circuit breaker handcart room
C. Cable room
D. Relay instrument room
1. Shell
2. Branch busbar
3. Busbar bushing
4. Main busbar
5. Static contact
6. Static contact box
7. Current transformer
8. Grounding switch
9. Cable
10. Lightning arrester
11. Grounding main busbar
12. Loading and unloading partition
13. Partition (valve)
14. Secondary plug
15. Circuit breaker handcart
16. Heating device
17. Extractable horizontal partition
18. Grounding switch operating mechanism
19. Bottom plate
20. Pressure relief device
21. Control wire trough
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