Opening; Rapid Auto-Reclosing; Manual Operation; Manually Charging The Closing S P Ring - Siemens 5-FSV-350 Installation Operation & Maintenance

Interrupter/Operator
Description
Insulated coupler
48
50 4 1 Limit switch
54 Trip Button
62 8 Trip Free Coupling Rod
Spnng Return Latch
62 8 1
62 8 2 Trip Free Coupling Link
62 8 3 Trip Free Coupling Lever
63 Breaker shaft
63 1 Lever
63 5 Lever
63. 7 Lever
64 2 Pawl
64 3 Lever (Lobes are omitted when
applied with screw type backing)
64 3 1 Pawl roller
68 . 1 Linkage
Figure 1 2
View of Mechanism Breaker Shaft i n Open Position

Opening

If the breaker is to be tripped locally, the tripping spring (64)
is released by p ressing the trip button , (54). In the case of an
electrical command being g iven , the shunt trip coil 52T, (54 1 ),
u nlatches the tripping spring (64 ) .
The tripping s p ring turns the b reaker shalt, (63 ) , via lever,
(63 5), the sequence being similar to that for closing .

Rapid Auto-Reclosing

Since the closing spring is automatically recharged by the
motor operating mechanism when the breaker has closed the
operating mechanism i s capable of an open-close-open d uty
cycle as required for rapid auto-rec losing .

Manual Operation

Electrically operated vac u u m circuit b reakers can be operated
manually if the control s u p p ly should fal l .
Manually Charging the Closing Spring ( Fig . 13)
I n sert the hand-crank, (50), i n hole, (50 . 1 ), and turn it clock­
wise u ntil the indicator, ( 55), s hows "CHARGED".
The hand-crank is coup led with the charg ing mechanism via
an overru ning coupling thus, the operator is not exposed to
any risk should the control supply recover d u ring charg i n g .
5o
50 1
55
58
59
Hand crank
50
50. 1 Opening for hand-crank
53 Close button
54 Tnp button
Figure 13
Front View of Mechanism Enclosure Arranged for Manual
Operation
Page 1 7
54
68 1
64 2
5 5 'Closing spring charged'
Indicator
58 Open-Closed
59 Operations Counter