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Detaylı Bilgi - Aoip RED Electrical Motor Control Electrical Motor Control
RED statormatic starters offer an unrivalled starting capability and have the following advantages:
They do not have any moving parts other than the short circuit contactor
There is no current peak at the end of the starting period
Electrical and mechanical maintenance considerably reduced
The starting characteristics are \"made to measure\" and can be altered for a change of motor or machine by simply replacing the electrolyte.
The starters of this range can be supplied in three formats: RC, RW or RZ. They are made up of two parts:
The electrolytic starting resistance in a frame with tanks and a thermostat.
An enclosure integrated into the frame which contains a short circuit contactor, a timing relay, eventually a line contactor or further option. The RC and RW units are supplied in this format.
A separate WS wall mounting enclosure can be used with RZ frames. The RZ/WS modular assemblies are prewired.
The decrease in resistance of an electrolyte when heated is used inside an electrode chamber. The resistance is connected in series with the motor windings to reduce terminal volts, starting torque and current drawn from the line.
As the motor runs up to speed, there is an automatic decrease in resistance value with a consequent increase in motor voltage, giving smooth acceleration without torque or current peaks.
At the end of the run-up period a timed contactor closes and short circuits the residual resistance.
Reduction of the starting torque is determined according to the requirements of the driven machine or the current limitation.