Page 179 - OT Switch

ABB S W I T C H - D I S C O N N E C T O R S – H I G H P E R F OR M A NC E, C OM P A C T S OL UT I ON 1 179 9
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ABB SWITCH-DISCONNECTORS – HIGH PERFORMANCE, COMPACT SOLUTION

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Accessories for motorized switch-disconnectors

Technical data for auxiliary contacts

Function table of OTM160…4000 auxiliary contacts

Handle position Main contacts Aux./Test contacts N.O. Test indication contacts N.O.
Test open closed closed
0 open open open
I closed closed open
04

ON
Handle indications and functions
• The handle indicates the position of the main contacts of
the switch with complete reliability in all situations.
If the contacts are welded together, the handle
does not reach the OFF-position but remains
between ON and OFF, maintaining the door
interlock and preventing padlocking.
• When operating the switch to the TEST-position OFF
with a test handle, the test auxiliary contacts change posi-
tion. The main contacts remain open.
Test

ON and OFF-functions of main and auxiliary contacts

0˚ 30˚ 60˚ 90˚ α ON
Main contacts 1. OFF
4.
NO auxiliary contact 2.
5.
NC auxiliary contact 3. α
6.
OFF ON
O I
= Contacts in closed position 0 I S00491A
= Contacts in closed position 0 I

Closing: Opening:
1. Main contacts close 4. Main contacts open
2. NO auxiliary contacts close 5. NO auxiliary contacts open
3. NC auxiliary contacts open 6. NC auxiliary contacts close