Products & Solutions

Place of Origin: China
Brand Name: Longsun
Model Number: LHD11F
Minimum Order Quantity: 1 pc
Delivery Time: 15 working days
Payment Terms: L/C, T/T, Western Union, etc.



Knife Switch Disconnector



Knife Switch Disconnector rated voltage 400V/690V, rated current 63A-3150A, 3 poles & 4 poles.

The Terminal Is Copper T3

Flame retardant V0 grade plastic

Resin or plywood


Conventional Current 100A 200A 400A 600A 1000A 1500A 2000A 3000A
Rated Current   In (A) 100A 200A 400A 600A 1000A 1500A 2000A 3000A
Rated Insulation   Voltage Ui (V) 690V 690V 690V 690V 690V 690V 690V 690V
Mechanical Life 10000 8000 8000 5000 5000 5000 3000 3000
Electrical Life 1000 1000 1000 500 500 500 300 300
Operation Moment (Nm) ≤300 ≤300 ≤400 ≤400 ≤450 ≤450 ≤450 ≤450


Knife Switch Disconnector is suitable for AC 50Hz, rated voltage 380V, AC voltage 380V, DC to 440V, rated current to 1500A, as a complete set of distribution devices, which can be used to switch on and off AC and DC circuits manually or as disconnectors infrequently.


Among them:

1. The single-switch and double-switch with central handle are mainly used in substations. They do not cut off the circuit with current and serve as isolation switches.

2. Side-operated handle-type knife switch is mainly used in power box.

3. The cutter switch of the central front lever operating mechanism is mainly used in the switch cabinet for front operation and rear maintenance. The operating mechanism is installed in front of the switch cabinet.

4. Side front-operated mechanical knife switch is mainly used in front-operated and front-maintained switchgear. Operating mechanism can be installed on both sides of the cabinet.




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