Kyn28 Metal-Clad Closed Withdrawable Switchgear

1. Introduction
KYN28-12 indoor metalclad withdrawable switchgear is designed to be complete distribution equipment with three-phase A.C. singe busbar and single busbar section system having a rated voltage of 3.6~12kV and rated frequency of 50Hz.The switchgear is mainly employed in receiving and distribution of power energy from the network as well as starting of large-sized HV motors. In addition, the switchgear is provided with controlling, protection and monitoring functions. The switchgear conforms to IEC 298, GB 3906, DL/T404-91 and other standards. The switchgear itself owns five prevention functions such as prevention of misoperation of circuit breakers, prevention of pushing or pulling truck with load, prevention of closing earth switch under voltage, prevention of supplying power when earth switch is at the earth position and prevention of entering the electrical separation zone by accident. The switchgear selects not only VS1 vacuum circuit breakers but also ABB made VD4 vacuum circuit breaders, thus recogninzed as power distribution equipment with excellent performance.

2. Working condition
2.1 altitude: 1000m
2.2 temperature: -10celsius degree ~+40celsius degree
2.3 relative humidity: daily average value 95%, monthly average value 90%
2.4 saturated vapor pressure: daily average value 2.2 10-3MPa, monthly average value 1.8 10-3MPa
2.5 earthquake intensity: less than 8 degree
2.6 protect the product from fire, explosion, earthquake and corrosion atmosphere.

3. Main features:
3.1. the enclosure is completely adopts the aluminum-zinc alloy coated steel sheet, which are machined and bent by machine tool and then bolted;
3.2. all the operations are under the door closing condition
3.3. with high protection category, can prevent intruding of sundries and insects
3.4. simple efficient 5 protection function can prevent operating incorrectly
3.5. the removing compartment of the switchgear may be assembled with VS1(ZN63A) or VD4 vacuum circuit breaker according to customer s demand
3.6. the replacing of VCB is simple and the interchangeability of truck is good.
3.7. the cabinet body can be installed against the wall, so the maintenance can be made in front of the cabinet and the cover area can be reduced too.
3.8. cable compartment has enough room, can connect muti-cable
3.9. high speed earthing switch is used for grounding and loop short circuit
3.10. VCB vault, relay vault and cable vault can add extra heater separately according the demand of customer, in order to avoiding condensation pheromone and corrosion.
3.11. VCB vault and cable compartment can add extra lighting device separately, in order to convenient maintenance.

4. Main technical parameters
4.1 main technical of vacuum switchgear

item unit parameter
Rated voltage kV 3.6 7.2 12
Rated current A 630 1250 1600 2000 2500 3150
Rated frequency Hz 50
Rated short-time withstand current kA 16 20 25 31.5 40
Rated peak withstand current kA 40 50 63 80 100
Rated power-frequency withstand voltage kV 42/1min
Rated lightning impulse withstand voltage kV 75
Rated duration of short circuit S 4
Degree of protection IP4X


4.2main technical parameters of vacuum circuit breaker
Item Unit Parameter
Rated voltage kV 12
Rated current A 630 1250 1600 2000 2500 3150
Rated short circuit breaking current kA 25 31.5 40
Rated short-time withstand current kA 25 31.5 40
Rated short circuit making current kA 63 80 100
Rated short-time power-frequency withstand voltage kV 42/1min
Rated lightning impulse withstand voltage (peak) kV 75
Rated short circuit duration S 4
Closing time (rated voltage) ms 35 t 70
Opening time (rated voltage) ms 20 t 50
Rated breaking times of short circuit times 50 (40kAis 30)
Mechanical life times 20000

4.3main technical parameters of operation mechanism
Item Unit parameter
Rated operation voltage Opening coil V DC220/110
AC220/110
Closing coil
Rated operation current Opening coil A (DC/AC)220/110V: 0.9/1.8
Closing coil (DC/AC)220/110V: 1.0/2.0
Power of energy storage motor W 70
Rated voltage of energy storage motor V DC220/110 AC220/110
Energy storage time S 15

5. Structure instruction
The basic structure of switchgear panel comprises the panel itself and a removing part (truck). The enclosure and clap-board of the switchgear is bolted with Al-Zn alloy coated steel.Enclosure protection degree of switchgear is IP4X, and the protection degree of every vault is IP2X.


800/1000*1500*2300mm.

KYN28-12 removable AC metal-clad switchgear (short for panel as below) is a new product. It will be a substitute for old fashioned metal-enclosed switchgear, such as KYN-12, JYN-12, GFC-12, etc.
The panel applies to 3.6~12kV 3 phase AC 50Hz network for receiving and distributing power energy and also for control, monitor and protection. It accords with standard of IEC62271-200, IEC60694, GB3906.

The newly introduced and developed large current and high breaking switchgear can also be used as a high- voltage generator export.

KYN28A-12 is the switchgear apply to the single busbar power system and single busbar sectionalized power system with three-phase AC 50Hz,7.2~12kV.It can be used for receiving & distributing electric power of the transmission and distribution control. The withdrawable part of the switchgear can be equipped with CKVB vacuum circuit breaker, vacuum contactor and other components.

It used for reception and distribution of electricity transmission and distribution control. It can provide satisfied technological solution in various different cases according to cliens requirements.

KYN28A-12 (GZS1-12) Model Indoor AC Metal Clad Intermediate Switchgear,KYN28A-12 (GZS1-12) Indoor AC Metal Clad Intermediate Switchgear,Circuit Breaker Switchgear,High and Low Voltage Switchgears,Indoor AC Switchgear
Product Description
KYN28A-12 (GZS1-12) Indoor AC Metal Clad Intermediate Switchgear, this product is suitable for three phase AC power system with rated voltage 12KV and rated frequency 50Hz, is used for receiving and distributing the power energy, to control, protect and monitor the circuit.

Product Features
Meet the standard: GB3906-97 3-35KV AC Metal-enclosed Switchgear, GB11022-89 High-voltage Switchgear General Technical Conditions, IEC298 (1990) AC Metal-enclosed Switchgear and Control Equipment With Rated Voltage Above 1kv and or Below 50kv , DL404-97 Order Technical Conditions for Indoor AC High Voltage Switchgear Cabinet.
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KYN28 drawout type indoor metal-enclosed switchgear assemblies
Rated voltage:12KV,24KV,35KV
Rated current:200A ,630A,1250A,2000A,3150A
Breaking capacity:25KA,31.5KA
KYN28 indoor metal-clad switchgear is a complete power distribution device for 3.6~24kV,3-phase AC50/60Hz,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. The switchgear meets IEC298,GB3906-91.In addition to be used with domestic VS1 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.

JSA Exports, a renowned player in the import-export sector, proudly presents a
comprehensive range of high-quality switchgear products. Our meticulously
crafted switchgear solutions are designed to effectively manage and control electrical power systems with utmost precision and reliability.