BuyLog Flippingbook FEB 2025

9-21

DISCONNECT SWITCHES AND OPERATING MECHANISMS, BUYLOG SECTION 9

— Accessories for fusible disconnect switches OS Mini 30A Technical information for auxiliary contacts

ON

Handle indications and functions

The handle indicates the position of the contacts with complete reliability in all situations. If the contacts are welded together, the handle doesn't reach the OFF-position but remains between ON and OFF, maintaining the door interlock and padlocking is not possible to do. When operating the switch fuse to the Test-position with a test handle the test auxiliary contacts change position. The main contacts remain open.

OFF

Test

ON and OFF-functions of main and auxiliary contacts

-45 ˚

0 ˚

30 ˚

60 ˚

90 ˚

Example

α

close

Main contacts NO auxiliary contact NC auxiliary contact

open

Places of auxiliary contacts and Test ind.

2

close open

1

open

close

1

close open

NO auxiliary contact NC auxiliary contact

2

open

close

Test

OFF O

ON I

OS Mini

-45 ˚

0 ˚

30 ˚

60 ˚

90 ˚

α

Main contacts NO auxiliary contact NC auxiliary contact

OA4B1C, 1 NO-NC

Change over contacts

OA1G10, 1NO OA3G01, 1NC

NO auxiliary contact NC auxiliary contact

Test

OFF O

ON I

0˚

30 ˚

60 ˚

90 ˚

α

O O

I I

Main contacts

NO auxiliary contact

MCB-10 + OESA-ZX169, 1NO MCB-01 + OESA-ZX169, 1NC

NC auxiliary contact

OFF O

ON I

OS30...63

-45 ˚

0 ˚

30 ˚

60 ˚

90 ˚

α