Starting current limiter & cable
The starting current limiters are used in conjunction with AC electric motors and power tools. They are also suitable for capacitor motors, large transformers and halogen lamps.
This electronic current limiter prevents the house fuse from being triggered by high inrush currents.
Overview starting current limiter & cables
Starting current limiter
Cables & Accessories
FAQ - Frequently asked questions
Electric motors make an axis rotate with magnetic fields. The magnetic field is generated with copper coils when current flows through the wire. Before the magnetic field has been established after switching on, the copper wire "looks" like a short circuit to the fuse. It almost is one, after all, there is a conductive connection between the two terminals and the fuse "flies out" because enormous currents flow in that brief moment, see the tripping diagram. The ASB connects a power resistor in front of the copper coil, which "consumes" the excess current as heat in a flash and thus limits the current. After 0.7 seconds, the magnetic field has long since built up, the motor turns and consumes the current itself, and only then does a relay in parallel with the power resistor switch the power supply fully on. The ASB itself has only the function of a normal line when the machine is running and the power resistor can cool down again.
Electric motors that start at idle draw a very high current for a very short time when they are switched on. If this is limited by the ASB, the motor starts anyway. If the motor starts under load because it has to move the pistons of the compressor against the pressure in the boiler, it cannot start with the limited current. If the ASB now switches on fully after 0.7 seconds, the full starting current is still drawn. The limitation had no effect and the fuse "blows". The ASB does not help here.
An inverter turns a DC voltage, e.g. a 12-volt car battery, into an AC voltage of 230 volts and can supply about 10 amps at the rated power. An electronic system regulates current and voltage, the regulation takes a certain amount of time and this is not available for the rapid load change. At the moment of switching on, the ASB limits the high starting current, but it switches on fully after 0.7 seconds and a lot of current is still needed quickly. Since no inverter has large capacitors that could supply large currents very quickly and the connected car battery is too sluggish, the voltage at the inverter collapses. Either the fuse on the inverter "blows" or the internal protective circuits simply switch off the inverter.
Yes - if the inverter is a pure sine wave inverter.
No, if the inverter has a square wave output.