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KYN61-40.5 Series
Metal-clad Ring Main Unit Switchgear

KYN61-40.5 Series Metal-clad Ring Main Unit Switchgear


KYN61-40.5 Series Metal-clad Ring Main Unit Switchgear is often used in indoor power distribution systems with a rated voltage of 40.5kV (50Hz). KYN61-40.5 series is suitable for receiving and distributing electric energy in power plants, substations and industrial and mining enterprises, and has functions such as control, protection and monitoring of circuits, and can also be used in places with frequent operations.

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Basic Parameters

Rated voltage: 40.5KV

Rated frequency: 50Hz

Rated normal current: 1250/1600/2000A

Rated short-circuit breaking current: 20/25/31.5KA

Rated short-time withstand current (in 4 sec): 20/25/31.5KA

Rated dynamic stability current (peak): 50/63/80KA

Power frequency withstand voltage (1min): 95KV

Rated lightning impulse withstand voltage (peak): 185KV

Opening time: 30s≤t≤60s

Closing time: 50s≤t≤100s

Rated short-circuit current breaking times: 20 Times

Mechanical life: 10000 Times

Applied standard: GB3906-2006, DL/T404-2007, IEC298


The switchgear adopts an assembled structure, and the circuit breaker adopts a floor-standing trolley (handcart) structure.

Equipped with a brand-new composite insulated vacuum circuit breaker, which has the advantages of good interchangeability and easy replacement.

The frame of the trolley is equipped with a screw nut pushing mechanism, which can easily move the handcart and prevent damage to the pushing structure due to misoperation.

All operations can be performed with the switchgear door closed.

The interlocking between the main switch, the trolley and the switchgear door adopts the mandatory mechanical locking method to meet the requirements of "five levels of protection".

There is ample space in the cable room, which can connect multiple cables.

Fast grounding switch is used for grounding and closing short circuit.

The enclosure ingress protection rating is IP3X, when the trolley room door is open, the ingress protection rating is IP2X.

Application Environment

Ambient temperature: -10℃~+40℃, the average value of 24h does not exceed +35℃

Altitude: ≤1000m

Relative humidity: daily average ≤95%, monthly average ≤90%

Water vapor pressure: daily average ≤2.2kPa, monthly average ≤1.8kPa

Seismic fortification intensity: Ⅷ

Installation site: no severe vibration and impact, and no fire, chemical corrosion, explosion and other dangers.

* If you need to customize according to your special needs, please contact us.

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