Locking Devices; Key Locks - Siemens UL 489 Operating Instructions Manual

15

Locking devices

15.1

Key Locks


Padlocking provisions (page 15-15)
(4)
(3)
*) Location on FS I
Key lock Manufacturer
Breaker-mounted KIRK
1
key lock SUPERIOR
Cradle-mounted
key lock
KIRK
2
SUPERIOR
Racking handle KIRK
3
key lock SUPERIOR
Bell Alarm and open
4
fuse lockout key lock
(1)
(2)
Application
To activate the locking device, the circuit breaker must be opened. If the circuit breaker is closed, the
locking device is blocked. The block is only effective when the key is removed. The key can only be
removed in "OPEN" position.

(page 15-2)
This cradle-mounted key lock prevents the closing of any circuit breaker installed in the cell which this
lock is installed. Up to two independent Kirk or Superior key locks may be installed.
To activate the lock, the circuit breaker must be open. If the circuit breaker is closed, the locking device
is blocked. The block is only effective if the key is withdrawn. The key can only be removed in the

"OPEN" position. (page 15-4)
Prevents drawing out of the racking handle. The circuit breaker is protected from being moved. The
block is only effective when the key is removed.
A lockable cover prevents resetting the Bell Alarm or open fuse lockout after the breaker trips.

(page 15-14)
3 *)

(page 15-9)
15 – 1