SIRIUS 3RU2/3RB3 overload relays
5.9 Accessories
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
531
5.9.5 Module for electrical remote RESET (3RU21 only)
5.9.5.1 Description
Function
An electrical remote RESET module which is compatible for use with all sizes is available for
the 3RU21 thermal overload relay. This module enables the overload relay to be reset
electrically from the control room following tripping. The module's coil is dimensioned for an
operating duration of 0.2 s to 4 s; maintained-contact operation is not permissible.
5.9.5.2 Connecting the remote RESET
Connection
The screw connections on the terminals of the electrical remote RESET module have the
same format as the screw connections on the auxiliary contacts of the 3RU21 overload relay.
Table 5- 28 Connection data for the remote RESET
Operating range The operating range of the coil is 0.85 to 1.1 x U
s
Power input The power input of the electrical remote RESET module is: 80 V AC,
70 W DC
Switching frequency 60/h
Voltages The electrical remote RESET module is available for the following voltages:
24 to 30 V AC/VDC
110 to 127 V AC/VDC
220 to 250 V AC/VDC
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