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Installation; Main Conductor Connection; Current Range Up To 100 A - Siemens 3RB12 Instructions Manual

Solid-state overload relay
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Installation

2
Installation
3
Connection
3.1

Main conductor connection

3.1.1

Current range up to 100 A

12
For dimension drawings, see graphics section, Fig. I
and II.
Mounting position: any
Mounting of 70 mm devices:
Snap-on mounting on 35 mm mounting rail in con-
formity with EN 50 022 or
srew mounting by means of inserted lugs as
accessory (3RB1900-0B).
Mounting of the 120 mm, 145 mm und 230 mm
devices:
Crew mounting integrated in the casing.
In addition for 120 mm size:
Baseplate for snap-on fastening on 75 mm mount-
ing rail (3UF1900-0J) available as accessory.
Rated motor currents from 1.25 A to 100 A:
Insert the motor leads per phase through the open-
ings (x) in the unit (see graphics section, Fig. Ia).
Rated motor currents less than 1.25 A:
Insert the motor leads per phase through the open-
ings (x), take them back through the loop opening (y)
and insert them again through the openings (x). You
will produce two loops in this way (see graphics sec-
tion, Fig. Ia).
The following table lists the number of loops for the
various rated motor currents.
3ZX1012-0RB12-1AA1

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