User Manual

SIRIUS 3RU2/3RB3 overload relays

5.9 Accessories

SIRIUS Innovations

System Manual, 01/2011, A8E56203870002-03

527

5.9.3 Mechanical remote RESET (release slide)

5.9.3.1 Description

Preliminary observation: Mechanical remote RESET

A mechanical remote reset option is also available for thermal overload relays and solid-

state overload relays. There are two options for the mechanical remote RESET:

● Release slide

● Cable release with holder for built-in ov

erload relays which are hard to reach (Page 529)

Release slide

There is one release slide for thermal overload relays and one for solid-state overload relays;

both are compatible for use with all sizes. The release slide with holder and former is used to

activate the RESET from the control cabinet door; it is shortened to the required length. A

pushbutton with extended travel and an extension plunger for compensation of the distance

between the pushbutton and the relay's unlocking button are available for the release slide.

5.9.3.2 Mounting/Disassembly

The figure below shows how the release slide, the holder, the former, and the pushbutton

are mounted based on the example of a size S0 3RU21 thermal overload relay:

Prerequisite

Before the release slide can be mounted, the release slide and the optional extension

plunger have to be shortened to the required length.

Table 5- 24 Mounting the release slide

Step Operating instruction Figure

1 Attach the hook on the release slide to the

designated opening on the overload relay.

2 Fold the module up so that the locking latch

snaps into the overload relay.