L&T Electrical & Automation OMEGA, Manual

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8) Lockable Trip Push Button (LTPB/LOB):
LOB locks the breaker in OFF position by continuously
pressing the OFF push button. Lock defeats all the positive closing signals (mechanical or electrical) coming to the
breaker and thus prevents the nuisance closing of the breaker. Locking ‘OFF’ button (LOB) can be implemented
using C-Type / R-Type of locks. The locks are designed in such a way that the keys cannot be removed out till the
breaker is locked (OFF button pressed). Locking of the breaker in OFF position ensures safety of the maintenance
person working on downstream equipment. Locking ‘OFF’ button (LOB) can be used
to design the interlocking schemes with other devices in the system.
9) Shroud for ON-OFF Button:
Transparent shroud blocks the access to the
ON/OFF push-buttons used to open and close the breaker. It prevents inadvertent or
unauthorized operation of the ON or OFF button. It’s possible to independently lock
the ON/OFF push button with the help of ON-OFF button shroud & mechanical lock. It
can be pad-locked with lock hasp of 6mm diameter.
Cradle Accessories:
1) Electrical Position Indication (EPI):
Secondary Isolating Contact (SIC) blocks on ACB cradle assembly
facilitates the electrical indication for the exact position of the breaker within the cradle. 3 SIC contacts
electrically indicates the Connected / Test / Disconnected positions of breaker.
2) Door-interlock:
Door-interlock inhibits the opening of door if ACB is in
Test or Service position. Door-interlock can be mounted on either side of
the cradle (LHS or RHS).
4) Racking Shutter Pad-lock:
Racking Shutter Pad-lock inhibits the access to the racking mechanism such
that racking handle cannot be inserted to rack-in/rack-out the breaker. Racking Shutter Pad-lock is an inbuilt
feature with Omega ACBs. It can be pad-locked with lock hasp of 6mm diameter.
3) Door-racking interlock:
Door-racking interlock prevents the
racking-in operation of the breaker if panel door is open.
5) Safety Locks:
Any of C-Type, R-Type locks can be used for locking the ACB in "Any position"/"Isolated
position" & locking "OFF" push button, for interlocking with other electrical devices in the control scheme of the
system.
C-Type
R-Type
73 Accessories