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KYN26-7.2(J.R) Withdrawable Switchgear

The KYN26-7.2(J.R) withdrawable switchgear is a piece of equipment combining a high-voltage current-limiting fuse and a vacuum contactor. Suitable for systems with the rated voltage of 3.6 to 7.2 kV, it is used to control motor, protect transformer, as well as open and close capacitor.

With the advantages of convenient control, reasonable protection features, and remarkable economic benefits, this withdrawable switchgear is generally used in the control circuit of motor with the rated power below 1,200 kW and transformer with the capacity below 1,600 kVA.

Technical Parameters
Item Unit Value
Rated kV 3.6 7.2
Rated Current Major Loop (Fuse) A 50~315
Main Busbar 1250~3150
Expected Short-Circuit Breaking Current kA 40, 50
Expected Short-Circuit Closing Current kA 100, 125
Short-time Withstand Current of Main Busbar (4s) kA 31.5 40 50/3s
Short-term Peak Withstand Current of Main Bus kA 80(100) 100(130) 125(140)
Power Frequency Impulse Withstand Voltage kV 32/60
Protection Class of Shell
Dimensions (W×H×D) mm 1200×2050×1775
Combination Way
Two loops
Weight kg 1200
J.R Loop 4s Short-time Withstand Current/Dynamic Stable Current kA 5 /12.5
Half-wave Let-through Current kA 40, 50
Note: 1. Values inside the bracket can be specially ordered.
2. The cabinet with the width of 1,000mm can be provided, but the threaded screw propulsion institution is not attached.

In the J-R loop (contactor - fuse loop), the contactor assumes all control and partial protection responsibilities, which fully utilizes the contactor's advantage of long service life. The short circuit protection is undertaken by the high-voltage current-limiting fuse which limits the magnitude and duration of short circuit current, thus enabling the cable with small section to be used and reducing the project cost. The withdrawable switchgear with J-R loop is particularly suitable for power systems with large system capacity and lots of small-capacity loads, such as the power system of power plant, petrochemical enterprises, etc.

This withdrawable switchgear is used indoors and is not installed against a wall. It can be used in conjunction with our company's KYN18A-12 switch cabinet and no transitional cabinet is needed. They can be arranged in a mixed manner. When used together with the German Siemens's 8BK20 or other switch cabinets, the main busbar can be specially designed to realize connection without transitional cabinet.

Service Environment
1. Ambient temperature: -10℃~+40℃
2. Altitude: ≤1,000m (>2,000m for some specially ordered product)
3. Relative humidity: Daily average≤95%, monthly average≤90%
4. Earthquake intensity: ≤8degree
5. This withdrawable switchgear should be used in places where there is no fire or explosion hazard, serious filth, chemical corrosion, polluted water vapor, or recurrent vibration.
6. If there is special condition of the service environment, customers should consult with us.

As a specialized withdrawable switchgear manufacturer and supplier in China, we also provide outdoor double pole vacuum circuit breaker, air circuit breaker, withdrawable low voltage switchgear, and much more.

Related Names
Motor Control Equipment | Transformer Protector | Capacitor Switching Device

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