525k Speed Controller

$82.50 inc GST

Model 525K Motor Speed Controller

The 525K is a Phase controller intended to control motors driving fans or pumps where the reduced torque available from the motor is balanced by the fan power requirements providing a reduced fan speed. The controller will speed control Permanent Split Capacitor (PSC) motors and some Shaded Pole Motors driving fan or similar loads. This controller will not control an unloaded motor. It is not suitable for motors driving conveyor belts or any variable load. It is not suitable for motors with centrifugally switched capacitors. The device has two wires that are connected in series with the load (either way round). It will operate correctly in either the Phase or Neutral line. In some applications the controller provides best results in series with the RUN winding only, leaving the START winding at full mains potential. This appears worth trying if magneto-strictive hum is a problem. For use with multi-speed motors, the controller will operate on any speed winding, but each situation may require selection to find the minimum magneto-strictive hum. The controller should be physically located close to the motor to minimise radiation of Electro Magnetic Interference EMI. The minimum speed adjustment must be set with the main control fully anticlockwise (minimum speed) The motor must be able to start from rest at the minimum setting to eliminate the possibility of a stall situation where motors could burn out through stall and consequent lack of cooling air.


12.5 Amps
Phase controller Designed for motors up to 1200 Watts driving fan loads.
Robust Diecast Alloy case
115mm x 50mm x 55mm (inc. heatsink)
6.35mm dia. control shaft 15mm long
Minimum speed adjustment screw 6.35mm
Spade earth terminal
Flying leads V105 30/025 blue

SKU: VT-525k. Category: .