KYN28 Series Withdrawable Metal Clad Switchgear - High Voltage Solutions from China Suppliers and Factory
KYN28 indoor metal-clad withdrawable switchgear (hereinafter short as switchgear) is a complete power distribution device for 3.6~24kV, 3-phase AC 50Hz, single-bus and single-bus sectionalized system. It is mainly used for power transmission of middle/small generators in power plants; power receiving, transmission for substations in power distribution and power system of factories, mines and enterprises, and starting of large high-voltage motor, etc., so as to control, protect and monitor the system.
General
The switchgear meets IEC298, GB3906-91. In addition to be used with domestic VSI vacuum circuit breaker, it can also be used with VD4 from ABB, 3AH5 from Siemens domestic ZN65A, and VB2 from GE, etc., it is truly a power distribution device with good performance.
In order to meet the requirement for wall mounting and front-end maintenance, the switchgear is equipped with a special current transformer, so that the operator can maintain and inspect it in front of the cubicle.
Service environment
- Air temperature: Maximum temperature: +40℃; Minimum temperature: -15℃.
- Humidity: Monthly average humidity 95%, Daily average humidity 90%.
- Altitude: Maximum installation altitude above sea level: 1000M.
- Environment: Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
- Stability: No frequent violent shake.
Structure & Basic Components of Switchgear
Overall size and weight
| Item | With VS1, VD4 inside | With VS1, VD4 inside | With 3AH5, ZN65A |
|---|---|---|---|
| W×D×H(mm) | 650×1400×2200 | 800(1000)×1500×2200 | 800(1000)×1700×2200 |
| Weight (kg) | 700 | 800 | 900 |
Notice: When the rated current is more than 1600A, cubicle width shall be 1000 mm, and cubicle height will be 1660mm for schema of rear overhead line in.
- Width of cabinet: 650mm (compound insulation) or 800mm (air insulation) at current
- Width of cabinet: 1000mm at current > 1250A.
- Depth of cabinet: 1400mm (width 650mm) for incoming and outgoing cables.
- Depth of cabinet: 1500mm (width 800mm) for incoming and outgoing cables.
- Depth of cabinet: 1600mm for rear overhead incoming and outgoing cables.
| A (mm) | B (mm) | L1 (mm) | B1 (mm) | Reference weight (Kg) |
|---|---|---|---|---|
| 650 | 1400 | 380 | 315 | 700 |
| 800 | 1500 | 530 | 315 | 800 |
| 800 | 1600 overhead | 530 | - | 900 |
| 1000 | 1500 | 730 | 490 | 1100 |
| 1000 | 1600 overhead | 730 | - | 1200 |
| 900 | 1700(with 3AH5) | 600 | 415 | 1000 |
Structure Features
Compartments: Busbar, Circuit breaker, Cable, and Low-voltage compartments.
1 - main device: circuit breaker, contactor
2 - current transformers
3 - earthing switch
4 - voltage transformers
5 - support-bushing insulators
6 - bushing insulators
7 - surge arresters
8 - support insulators (reactance)
9 - main busbars
10 - connecting busbars
11 - earth-fault transformer
12 - earthing conductor
13 - metal movable partitions
14 - cable ducts (optionally)
15 - vent flaps
Schematics of dimensions of switchgear
Dimension in brackets means dimension of heavy-current cubicle.
Main components characteristics
 |
VS1-12 indoor drawable vacuum circuit breaker. Rated voltage 12kV up to 24kV Rated current 630A up to 4000A Rated short circuit breaking current 20kA up to 40kA Mechanical life 10,000 times |
 |
VD4 embeded pole indoor vacuum circuit breaker. Rated voltage 12kV up to 24kV Rated current 630A up to 4000A Rated short circuit breaking current 20kA up to 40kA Mechanical life 10,000 times |
 |
VSM magnetic actuator indoor VCB Rated voltage 12kV up to 24kV Rated current 630A up to 4000A Rated short circuit breaking current 20kA up to 40kA Mechanical life 100,000 times |
Transportation, Maintenance and Order
Transportation and Storage
The switch cabinet can be transported by fork truck if fixed on the bottom plate. It should always be transported vertically. Long-term storage should be in a dry, ventilated indoor warehouse. Outer package validity is normally no more than 1 year.
Maintenance
Free of maintenance for 3 years under normal conditions. Maintenance periodicity is normally once per year, including:
- Fasten all electrical connectors (main bus bar, switch, cable, etc.).
- Clean parts with a dust collector and check appearance.
- Perform switching on/off operations for all switches including earth switch.
- Clean the busbar and cable cubicles.
Order Information
Complete-set Product Documents: Qualification Certificate, Installation/Operation Instruction, Packing List, and Engineering Design Documents.
Customer Requirements for Order:
- Wiring diagram of Main circuit Loop and Special Technical Requirements.
- Installation Arrangement Plan of switch panel.
- Specification of components inside and schematic diagrams of auxiliary/control loops.
- Other written documents specially required.
Frequently Asked Questions (FAQ)
1. What is the voltage range for KYN28 switchgear?
The KYN28 switchgear is designed for 3-phase AC 50Hz systems with a rated voltage range of 3.6kV to 24kV.
2. Which vacuum circuit breakers are compatible with this switchgear?
It is compatible with domestic VS1 series, ABB's VD4, Siemens' 3AH5, domestic ZN65A, and GE's VB2 vacuum circuit breakers.
3. What are the standard environmental operating conditions?
It operates within a temperature range of -15℃ to +40℃, at altitudes up to 1000M, and in environments with up to 95% monthly average humidity.
4. How many compartments are inside the KYN28 switchgear?
The structure includes four main compartments: busbar compartment, circuit breaker compartment, cable compartment, and low-voltage compartment.
5. What is the typical maintenance schedule?
Under normal conditions, it is maintenance-free for 3 years. However, a routine inspection and cleaning are recommended once every year.
6. What documentation is required for a custom order?
Customers need to provide the main circuit wiring diagram, installation arrangement plans, component specifications, and any specific technical requirements.