3RT1/3RH1 contactors
SIRIUS System Manual
3-66
GWA 4NEB 430 0999-02b
3.4.2.2 Frame sizes S0 to S3 (3RT1926-2E, -2F, -2G)
Description
The time-delay auxiliary switch for frame sizes S0 to S3 has the following
features:
• The power supply of the time-delay auxiliary switch is via 2 terminals (A1/
A2).
• The time delay for the time-delay auxiliary switch can be activated by par-
allel connection to any contactor coil, or by any source of voltage.
• The off-delay version works without an auxiliary supply.
• The minimum on-time is 200 ms.
• In addition to the time-delay auxiliary switch, a 1-pole auxiliary switch
block can be snapped onto the front of the contactor.
• The time-delay auxiliary switch does not have any integrated overvoltage
damping for the contacted contactor.
Information on mount-
ing
Note about the off-delay without auxiliary supply function:
The position of the output contacts is not defined at shipment (bistable
relay). Apply the control supply voltage once, and then switch it off again to
set up the initial state of the contacts.
Installation/removal
.
Figure 3-44: Time-delay auxiliary switch block (frame sizes S0 to S3)
Connection
The A1 and A2 terminals for the rated control supply voltage of the time-
delay auxiliary switch are connected to the respective contactor with cables.
Terminal markings
Because an additional auxiliary switch block can be snapped onto the con-
tactor, the terminals of the delayed contacts have been
designated as -5/-6 (NC contact) and -7/-8 (NO contact).
The time-delay auxiliary switch
is attached to the front of the
contactor.
2
1
3RT1.2
3RT1.3
3RT1.4
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