Siemens 3RA2816-0EW20 Sirius Function Module
Siemens 3RA2816-0EW20 Sirius Function Module for Star-Delta starting.
The Siemens 3RA2816-0EW20 is a function module for star-delta (wye-delta) motor starting. It consists of a lateral basic module and two coupling modules, offering a time range of 0.05 to 60 seconds. This module operates on 24-240V AC/DC, 50/60 Hz, and includes an integrated varistor for attenuating contactor coil surges. It is designed for use with 3RT20 series contactors.
This function module is ideal for soft starting three-phase motors across various industrial applications. It is commonly used in manufacturing, material handling, and processing industries where smooth motor acceleration is required to reduce mechanical stress and electrical load. Applications include conveyor systems, pump controls, and fan applications.
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| Type | Function module star-delta |
| Time range | 0.05-60 s |
| Voltage | 24-240 V AC/DC |
| Frequency | 50/60 Hz |
| Integrated varistor | Yes |
| For contactors | 3RT20 |