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Requirement：
In order to ensure that the compressor starts with the minimum load and consider the safety of
the compressor, the compressor should control the start and stop of the compressor according
to the requirements of the above figure 3-1
4. Electrical articles
4.1 motor
4.1.1 Overview
In order to reduce the starting current, the SL compressor motor adopts the star-delta
starting method.
The standard motor of SL series compressors is a 3-phase asynchronous 2-stage Y/
winding type (rotation speed is 2950r/min at 50Hz), and the applicable voltage is 380V/3/50HZ
or 460V/3/60HZ. If you need other special electrical system, please contact RFC.
The operating current and input electric power under different working conditions can be
calculated by the Lefkang selection software. The main electrical parameters such as star
Y/
△
structure
In order to reduce the resistance torque at start-up to avoid overloading the motor at
start-up, the compressor should start at minimum load.
In Figures 4-2 and 4-3, the three-phase electrical wiring diagram of the Y/
the time sequence diagram of the contactor closing are given. The compressor should be set
as follows during the startup process:
Star structure
Figure 4-1 Internal structure of Y/motor
Triangular structure
△
△
motor and
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