The ASB start-up current limiters from SCHABUS are used in conjunction with AC electric motors and power tools that start at idle. They are also suitable for capacitor motors, large transformers, and halogen lamps . This electronic current limiter prevents the household circuit breaker in the power connection box from tripping due to high inrush currents .
Our extension cables are handcrafted at SCHABUS using high-quality TITANEX – H07 RN-F , the number one among rubber-sheathed cables, and high-quality Schuko-ABL Sursum power plugs and connectors. We test each individual cable for insulation and protective conductor resistance using a special test device according to VDE criteria. TITANEX is used in applications where application criteria are absolutely critical and must be precisely adhered to.
Electric motors use magnetic fields to rotate an axle. The magnetic field is generated by copper coils when current flows through the wire. Before the magnetic field is built up after switching on, the copper wire "looks" like a short circuit to the fuse. And it almost is one, after all, there is a conductive connection between the two terminals, and the fuse "blows" because enormous currents flow in this brief moment, see the tripping diagram. The ASB connects a power resistor upstream of the copper coil, which quickly "consumes" the excess current as heat, thus limiting the current. After 0.7 seconds, the magnetic field has long since built up, the motor rotates and consumes the current itself, and only then does a relay in parallel with the power resistor fully switch on the power supply. When the machine is running, the ASB itself only functions as a normal conductor, allowing the power resistor to cool down again.
Electric motors that start at idle draw a very high current for a very short time at the moment of switching on. If this current is limited by the ASB, the motor will still start. If the motor starts under load because it has to move the compressor pistons against the pressure in the tank, it simply 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 is of no help here.
An inverter converts direct current, e.g. from a 12-volt car battery, into an alternating current of 230 volts and can supply around 10 amps at its rated output. Electronics regulate the current and voltage; this regulation takes a certain amount of time, and this time is not available for rapid load changes. When switched on, the ASB limits the high starting current, but switches fully on after 0.7 seconds and a lot of current is still required 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 the inverter off.
Yes - if the inverter is a pure sine wave inverter.
No, if the inverter has a square wave output.
