KYN28A-12 is a relatively common high-voltage switchgear in China. The full name is: Indoor Metal Armored Removable Switchgear. The rated voltage is 3.6kV~12kV, and its characteristic is that the vacuum circuit breaker is equipped with a central type, that is, the circuit breaker is located in the middle of the front cabinet of the switchgear, so the lower space can be saved for the expansion of other solutions or as a cable room.
Switchgear accoding to GB3906 and IEC298 armored metal- emclosed switchgear standard designed by the cabinet and the overall cabinet be composed of housing and withdrawable part (handcart) two parts, the cabinet made of high quality cold-rolled steel and high quality aluminum deposited zinc plate by precision CNC macjing (some parts with high precision laser cutting machine and sprcial mold), doble side process forming, connected together by high strengh bolts, nuts, rivet nuts, steel rivets, cabinet low pressure chamber, circuit breakers chamber, bus room, cable room unit cell effectively separated, and each unit has separate pressure relief channnel, with good relief and ventilation, indoor another cable set 10*60mm main ground bus.
2. With full assembled cabinet, compact structure, equipped with a variety of domestic and international mainstream vacuum circuit breaker, voltage transformers, surge arresters, the varivles fuses, isaolation in the home -handcart, all the same functionality handcart unit, have a good interchangeability, easy operation and replacement.
It has a simple and effective ‘Five Anti’ interlock to prevent misuse.
The cabinet can be used with ZN63A(VS1), VD4, ZN21, 3A1-1, VB2 and VEP vacuum circuit breaker, VC7 vacuum contactor, load switch and disconnecting switch so on.
It can be used with voltage transformer handcart, metering handcart, isolating handcart, station used earthing handcart, of which are with same function and interchangeable .
The cabinet can be installed against the wall, the maintenance can be done in the front of the cabinet, it can reduce the footprint.
The circut breaker room and cable roon can separetely equipped with heater to prevent the condensation and corrosion.
The cable roon is spacious, and it can be connected to many cables.
Switchgear enclosed protection rating reaches to IP4X. eaxch compartment level of protection is IP2X.
|Rated current of circuit breaker||A||630/1250/1600/2000/2500/3150|
|Rated current of switch cabinet||A||630/1250/1600/2000/2500/3150|
|Rated current of dynamic stability (4S)||KA||20/25/31.5/40|
|Rated current of dynamic stability (peak)||KA||50/63/80/100|
|Rated short circuit breaking current||KA||20/25/31.5/40|
|Rated short circuit making current (peak)||KA||50/63/80/100|
|Rated insulation level||1min power frequency withstand voltage||KA||25||30||42|
|lighting impulse withstand voltage||KA||40||60||75|
|Protection degree||IP2X shell: IP4X, it is IP2X when compartment and circuit breaker room is open|
Cabinet outline dimensions (mm) (not including door)
1. Altitud: <1000m.
2. Ambient temperature: -10℃ ~ +40℃ (temperature can be as low as -25℃ during transportation and storage)
3. Relative humidity: daily relative humidity 95% on average; monthly relative humidity 90% on average.
4. Seismic scale of earthquake 8.
5. The switchgear is applicable to category Ⅱcontaminated environment.
Special Operation Conditions: If the switchgear will be used in conditions that exceed the normal environmental conditions, users shall negotiate with the manufacturer.
The following technical information should be provided when ordering:
1. The number of the main circuit scheme diagram, the purpose and the main wiring system diagram, the layout and arrangement diagram of the power distribution room, etc.
2. Requirements for control, measurement and protection functions of switchgear and requirements for other locking and automatic devices.
3. The model, specification and quantity of the main electrical components in the switchgear.
4. If bus bridge connection is required between switchgear or incoming cabinet, specific requirements data such as the rated current carrying capacity of the bus bridge, the span of the bus bridge, and the height from the ground should be provided.
5. When the switchgear is used in special environmental conditions, it should be explained in detail when ordering.
6. Other special requirements.
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