S47183-e 01/2008
Design and specifications are subject to change without notice
9
With correctly designed interlock in enclosure, FTU provides
safety-tripping function. The breaker is tripped BEFORE its
terminals are disconnected from mains, during withdraw
operation of the trolley.
Fig. 10b Positioning of the forced tripping pin
3.2.8 Hand lever (code nr: 16)
•
Optionally, hand lever for manual closing and opening
operation during maintenance is available. This tool
must not be use while breaker is alive!
•
To close the contacts, install hand lever on the drive’s
rod, and pull it smoothly until latches snap [Fig. 11a].
•
To open the contacts, install the tool into the ring and
push it hard against the drive’s rod until breaker opens
[Fig. 11b].
Fig. 11a Closing operation by using hand lever
Fig. 11b Opening operation by using hand lever
3.2.9 Auxiliary switches (code nr: 9)
•
The breaker can be equipped with 3, 5 or 10 isolated,
form C, auxiliary switches (1 NO/NC each). The movable
main arm activates the contacts.
•
The contacts are wired to 15-pin control terminals: -X4
and -X5; 5 switches to each terminal.
•
Maximum electrical ratings for switches are 5A/230VAC
and 0.3A/220VDC. Utilization category AC/DC 12 and 13.
Fig. 12 Auxiliary contacts layout in control box
3.2.10 Indicators
Optionally, the circuit breaker can be equipped with follow-
ing indicators:
•
POSITION INDICATOR (code nr: 14) - is mounted at the
front of the closing drive. It’s mechanically switched by
means of drive’s rod position. It indicates position of the
main contacts. “O” – means contacts are open; “I” –
means contacts are closed [Fig. 13].
•
OCT INDICATOR (code nr: 10) – electrical switch, the
same type as in 3.2.7, mounted at the top of OCT [Fig.
14]. It’s potential free, NO contact, which provides sig-
nalization of the OCT tripping.
•
ARC CHUTE INDICATOR (code nr: 17) – electrical switch,
the same type as in 3.2, mounted on the sidewall. Indi-
cates presence of the arc chute and blocking closing
drive until arc chute is installed [Fig. 15].
ring
Bottom view
(~45 lbf)
