3RA61/3RA62 compact starter
5.2 Description of the hardware
SIRIUS 3RA6 compact starter
48
System Manual, 09/2014, NEB560060102000/RS-AA/006
5.2.3
3RA62 compact starter (reversing starter)
Features
The 3RA62 compact starter (reversing starter) is made up of the following components:
●
Reversing starter
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Two removable main circuit terminals
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Two 6-pin removable control circuit terminals
(A1+ / A2 -, B2 / B1, "overload" and "short-circuit/malfunction" signaling contact and
internal auxiliary contacts)
●
Two slots for optional external auxiliary switch blocks (2 NO contacts, 2 NC contacts or
1 NO c 1 NC contact)
Control is either via the control supply voltage connection at terminals "A1+", "A2/B2-" and
"B1+" or via the AS-i mounting module.
For additional information on the AS-i mounting module, please refer to "AS-i mounting
module for 3RA61/3RA62 compact starter (Page 206)".
Direction of rotation interlock
The operating mechanisms for the reversing starter's directions of rotation are interlocked.
This precaution prevents the operating mechanisms for direction of rotation 1 and direction
of rotation 2 from being activated simultaneously, which would result in a short circuit.
Operating mechanism interlocking is implemented on both a mechanical level (against shock
loads) and an electrical level (against incorrect activation).
Note
If direction of rotation 1 and direction of rotation 2 are set simultaneously instead of
consecutively, the compact starter does not switch on.
Note
When switching several 3RA62 reversing starters in parallel, the operating mechanism must
be switched via a separate auxiliary contact.
You can find a connection example in "Control circuit of the 3RA61/3RA62 compact starter
(Page 283)".
