Manual Closing; Manual Opening; Elementary Diagram; Indi Rect Releases (Dual Tri P & Undervoltage) - Siemens 5-FSV-350 Installation Operation & Maintenance

Interrupter/Operator
Description

Elementary Diagram

I
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- - -
"
• • _
-
Figure 15.
Typical Elementary Diagram

Manual Closing

Press the close butto n , (53) The close-open indicator, (58 ) ,
will then display "closed" a n d t h e closing spring condition in­
dicator will now read " D I SCHARGED".

Manual Opening

The tripping spring is charged during closin g .
To open the breaker, p ress t h e trip button , (54) , a n d "OPEN"
wi l l be displayed by indicator, (58)
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Indirect Releases (Dual Trip and
Undervoltage)
The ind i rect release provides for the conversion of modest
control signals into powerful mechanical energy impulses . It is
primarily used to trip high voltage c i rcuit breakers while func­
tioning as a secondary (dual trip) release or undervoltage re­
lease device.
These releases are mechanical energy storage devices. Their
internal springs are charged as a consequence of the b reak­
ers mechanism operatin g , and are released upon application
or removal of applicable control voltages.
Refer to Figures 16, 16a, 16b, & 16c
-SYMBOL LIST-
Spring Charging Motor
88
Spring Release Coil (Close)
52SRC
52Y Closing Relay (Anti-Pump)
52T Shunt Trip Coil
LS Spring Charged Switch
52a Aux. Sw-Open When Brk is Open
52b Aux Sw-Ciosed When Brk i s Open
R Red lndicatong Light (Close)
_ ... _ . .
• T - y
•
G Green indicating Light (Trip)
I
White indicating Light (Spnngs
W
Charged)
01/C Control Switch (Close)
Control Switch (Trip)
01/T
Ml Mechanical Interlock
I,
Note Shown as typical For actual control
schematic see contract drawings Devices
and wires shown dashed are external to the
breaker
. .
T
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MSV/FSV