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KYN28A-12 Metal clad switchgear (hereinafter referred to as switchgear) is suitable for three-phase AC 50Hz power system. It is mainly used for power transmission of power plants, small and medium-sized generators, power distribution of industrial and mining enterprises and institutions, power reception and power transmission of secondary substations of electric power systems, and starting of large high-voltage motors, etc., to realize control, protection and monitoring. This switchgear meets the requirements of GB/T11022, GB/T3906 and other standards, and has the interlocking functions of preventing the circuit breaker from being pushed and pulled with load, preventing the circuit breaker from being opened and closed by mistake, preventing the earthing switch from being closed when it is in the closed position, and preventing the earthing switch from being mistakenly closed when it is charged. It can be equipped with both ZN63A-12 vacuum circuit breaker developed by our company and VD4 vacuum circuit breaker of ABB company and VB2 vacuum circuit breaker of GE company in the United States.
| Scheme No. | 001 | 002 | 003 | 004 | 005 | 006 | |||
| Primary wiring scheme |
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| Rated current (A) | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | |||
| Main electrical components | Vacuum circuit breaker GTV8 or VD4 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
2 | 2 | 2 | 3 | 3 | 3 | |||
| Voltage transformer | |||||||||
| High voltage fuse XRNP-12 | |||||||||
| Earthing switch JN15 | 1 | 1 | 1 | 1 | |||||
| Arrester
HY5WS-17/50 |
3 | 3 | |||||||
| Circuit name | Receiving
electricity,Feed |
Receiving
electricity,Feed |
Receiving
electricity,Feed |
Receiving
electricity,Feed |
Receiving
electricity,Feed |
Receiving
electricity,Feed |
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| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | ||||||||
| Scheme No. | 007 | 008 | 009 | 010 | 011 | 012 | |
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Primary wiring scheme |
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| Rated current (A) | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | |
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Main electrical components |
Vacuum circuit breaker GTV8 or VD4 | 1 | 1 | 1 | 1 | 1 | 1 |
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
2 | 2 | 2 | 3 | 3 | 3 | |
| Voltage transformer | |||||||
| High voltage fuse RN2-12 | |||||||
| Earthing switch JN15 | 1 | 1 | 1 | ||||
| Arrester
HY5WS-17/50 |
3 | ||||||
| Circuit name | Contact (right) | Contact (right) | Contact (left) | Contact (left) | Contact (right) | Contact (left) | |
| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | ||||||
| Scheme No. | 013 | 014 | 015 | 016 | 017 | 018 | |
| Primary wiring scheme | |||||||
| Rated current (A) | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | |
| Main
electrical components |
Vacuum circuit breaker
GTV8 or VD4 |
1 | 1 | 1 | 1 | 1 | 1 |
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
2 | 2 | 2 | 3 | 3 | 3 | |
| Voltage transformer | |||||||
| High voltage fuse XRNP-12 | |||||||
| Earthing switch JN15 | 1 | 1 | 1 | ||||
| Arrester
HY5WS-17/50 |
3 | 3 | |||||
| Circuit name | Contact (left) | Contact (left) | Overhead Incoming
wire (left contact) |
Overhead Incoming
wire (left contact) |
Overhead Incoming
wire (right contact) |
Overhead Incoming
wire (right contact) |
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| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | ||||||
| Scheme No. | 019 | 020 | 021 | 022 | 023 | 024 | |
| Primary wiring scheme | ![]() |
![]() |
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| Rated current (A) | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | |
|
Main electrical components |
Vacuum circuit breaker
GTV8 or VD4 |
1 | 1 | 1 | 1 | 1 | 1 |
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
3 | 3 | 3 | 3 | 2 | 2 | |
| Voltage transformer | |||||||
| High voltage fuse XRNP-12 | |||||||
| Earthing switch JN15 | 1 | 1 | 1 | ||||
| Arrester
HY5WS-17/50 |
3 | ||||||
| Circuit name | Overhead
Incoming wire (left contact) |
Overhead
Incoming wire (left contact) |
Overhead Incoming
wire (right contact) |
Overhead Incoming
wire (right contact) |
Overhead Incoming
and outgoing wire |
Overhead Incoming
and outgoing wire |
|
| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | ||||||
| Scheme No. | 037 | 038 | 039 | 040 | 041 | 042 | |||||||
|
Primary wiring scheme |
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| Rated current (A) | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | |||||||
|
Main electrical components |
Vacuum circuit breaker GTV8 or VD4 | 1 | |||||||||||
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
2 | ||||||||||||
| Voltage transformer | RZL-10 | 3 | RZL-10 | 2 | RZL-10 | 3 | RZL-10 | 2 | RZL-10 | 3 | RZL-10 | 2 | |
| High voltage fuse XRNP-12 | 3 | 3 | 3 | 3 | 3 | 3 | |||||||
| Earthing switch JN15 | |||||||||||||
| Arrester HY5WS-17/50 | 3 | 3 | 3 | 3 | |||||||||
| Circuit name | Cable Incoming +PT | Voltage
measurement |
Voltage
measurement |
Voltage
measurement |
Voltage
measurement + Arrester |
Voltage
measurement + Arrester |
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| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | ||||||||||||
| Scheme No. | 043 | 044 | 045 | 046 | 047 | 048 | |||||||
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Primary wiring scheme |
|
|
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| Rated current (A) | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | |||||||
|
Main electrical components |
Vacuum circuit breaker GTV8 or VD4 | ||||||||||||
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
|||||||||||||
| Voltage transformer | RZL-10 | 3 | RZL-10 | 2 | RZL-10 | 2 | RZL-10 | 3 | RZL-10 | 3 | RZL-10 | 2 | |
| High voltage fuse XRNP-12 | 3 | 3 | 3 | 3 | 3 | 3 | |||||||
| Earthing switch JN15 | |||||||||||||
| Arrester HY5WS-17/50 | 3 | 3 | |||||||||||
| Circuit name | Voltage
measurement + Arrester |
Voltage
measurement + Bus bar |
Voltage
measurement + Bus bar |
Voltage
measurement + Bus bar |
Voltage
measurement + Bus bar |
Voltage
measurement + Arrester + Bus bar |
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| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | ||||||||||||
| Scheme No. | 049 | 050 | 051 | 052 | 053 | 054 | ||||||
| Primary wiring scheme | ||||||||||||
| Rated current (A) | ||||||||||||
| Main
electrical components |
Vacuum circuit breaker GTV8 or VD4 | |||||||||||
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
||||||||||||
| Voltage transformer | RZL-10 | 2 | RZL-10 | 3 | RZL-10 | 3 | ||||||
| High voltage fuse XRNP-12 | 3 | 3 | ||||||||||
| Earthing switch JN15 | ||||||||||||
| Arrester HY5WS-17/50 | 3 | 3 | 3 | |||||||||
| Circuit name | Voltage
measurement + Arrester + Bus bar(left) |
Voltage
measurement + Arrester + Bus bar(Right) |
Lift (left) | Lift (Right) | Isolation | |||||||
| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | |||||||||||
| Scheme No. | 055 | 056 | 057 | 058 | 059 | 060 | ||||||
| Primary wiring scheme | ||||||||||||
| Rated current (A) | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | ||||||
| Main
electrical components |
Vacuum circuit breaker GTV8 or VD4 | 1 | 1 | 1 | 1 | 1 | ||||||
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
||||||||||||
| Voltage transformer | RZL-10 | 2 | RZL-10 | 2 | RZL-10 | 2 | ||||||
| High voltage fuse XRNP-12 | 3 | 3 | 3 | |||||||||
| Earthing switch JN15 | 1 | |||||||||||
| Arrester HY5WS-17/50 | 3 | |||||||||||
| Circuit name | Isolation +
Contact (left) |
Isolation +
Contact (left) |
Isolation +
Contact (left) + Voltage measurement |
Isolation +
Contact (left) + Voltage measurement |
Outgoing
wire phase Transformation |
Outgoing
wire phase Transformation |
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| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | |||||||||||
| Scheme No.
Primary wiring scheme |
061 | 062 | 063 | 064 | 065 | 066 | |||||||
| Rated current (A) | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | |||||||
|
Main electrical components |
Vacuum circuit breaker GTV8 or VD4 | |
|||||||||||
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
2 | 2 | 3 | 3 | 2 | 2 | |||||||
| Voltage transformer | RZL-10 | 3 | RZL-10 | 2 | RZL-10 | 2 | RZL-10 | 2 | RZL-10 | 3 | RZL-10 | 3 | |
| High voltage fuse XRNP-12 | 3 | 3 | 3 | 3 | 3 | 3 | |||||||
| Earthing switch JN15 | |||||||||||||
| Arrester HY5WS-17/50 | |||||||||||||
| Circuit name | Metering + Left link | Metering + Right link | Metering + Left link | Metering + Right link | Metering + Left link | Metering + Right link | |||||||
| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | ||||||||||||
| Scheme No. | 067 | 068 | 069 | 070 | 071 | 072 | |||||||
|
Primary wiring scheme |
|||||||||||||
| Rated current (A) | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | |||||||
|
Main electrical components |
Vacuum circuit breaker GTV8 or VD4 | 1 | 1 | ||||||||||
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
3 | 3 | 2 | 2 | 2 | 2 | |||||||
| Voltage transformer | RZL-10 | 3 | RZL-10 | 3 | RZL-10 | 2 | RZL-10 | 2 | RZL-10 | 2 | RZL-10 | 3 | |
| High voltage fuse XRNP-12 | 3 | 3 | 3 | 3 | 3 | 3 | |||||||
| Earthing switch JN15 | 1 | ||||||||||||
| Arrester HY5WS-17/50 | 3 | 3 | |||||||||||
| Circuit name | Metering + left contact | Metering + Right contact | Incoming + metering | Incoming + metering | Incoming + metering | Incoming + metering | |||||||
| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | ||||||||||||
| Scheme No. | 073 | 074 | 075 | 076 | 077 | 078 | ||||||
|
Primary wiring scheme |
|
|
|
|
|
|
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| Rated current (A) | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | 630~3150 | ||||||
|
Main electrical components |
Vacuum circuit breaker GTV8 or VD4 | 1 | 1 | |||||||||
| Current transformer
LZZBJ9-12/150b/2 LZZBJ9-12/150b/4 |
3 | 3 | 3 | 3 | ||||||||
| Voltage transformer | RZL-10 | 3 | RZL-10 | 2 | RZL-10 | 2 | RZL-10 | 2 | RZL-10 | 3 | ||
| High voltage fuse XRNP-12 | 3 | 3 | 3 | 3 | 3 | |||||||
| Earthing switch JN15 | ||||||||||||
| Arrester HY5WS-17/50 | 3 | 3 | ||||||||||
| Circuit name | Metering + Left link | Metering + Right link | Metering+
Metering |
Metering+
Metering |
All changes | Capacitor cabinet | ||||||
| Remarks | If the rated current is 1600A and above, the cabinet width is 1000mm. | |||||||||||
Altitude: ≤ 1000m;
Environment temperature: Upper limit of environment air temperature +40℃ lower limit -15℃
Relative humidity: the daily average relative humidity is no more than 95%; Monthly average relative humidity is not greater than 90%;
Seismic level: seismic intensity does not exceed 8 degrees;
Suitable for condensation and class ‖ polluted environment.
When the above conditions exceed the normal environment specified in GB3906, the user shall negotiate with the manufacturer.
| Item | Unit | Parameters | |||
| Rated voltage | kV | 3.6、7.2、12 | |||
| Rated frequency | Hz | 50 | |||
| Circuit breaker rated current | A | 630、1250、1600、2000、2500、3150、4000 | |||
| Rated current of switchgear | A | 630、1250、1600、2000、2500、3150、4000 | |||
| Rated dynamic stable current(4s) | kA | 16、20、25、31.5、40、50 | |||
| Rated dynamic stable 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 | 1min Power frequency withstand voltage | kV | 24 | 32 | 42 |
| Lightning shock,
withstand voltage |
kV | 40 | 60 | 75 | |
| Protection grade | The enclosure is IP4X, and the compartments and circuit breaker rooms are IP2X when the door is opened | ||||

| Height H(mm) | 2300(2200) | |
| Width W(mm) | Rated current of branch busbar ≤ 1250A Thermally stable current ≤ 40kA | 800 |
| Rated current of the branch busbar ≥ 1600A | 1000 | |
| Depth D(mm) | Cable Incoming and outgoing wires | 1500 |
| Overhead Incoming and outgoing wires | 1660 | |
| Weight (kg) | 700~1200 | |