Options And Accessories; Handling - S&C Mark V Circuit-Switchers Installation Manual

Options and Accessories

Shunt-Trip Device
High-Speed tripping of power-operated Mark V Circuit-
Switchers is furnished by the S&C Shunt-Trip Device.
This optional accessory (circuit-switcher catalog number
suffix "-T1" or "-T2") provides high speed (8-cycle) circuit
interruption. The Type CS-lA Switch Operator is required
if the shunt-trip device is specified.
If the optional shunt-trip device has been specified, a
shunt-trip solenoid housing will be attached to the side of
each pole-unit base near the rotating-insulator support, and
a shunt-trip linkage will be attached to the brain. For circuit-
switchers rated 69 kV and above, the shipment will also
include, in separate cartons, insulator units and hardware
for the three shunt-trip insulated operating shafts. The
cartons containing these insulator units should be opened
to inspect for shipping damage, but the units should be
left in the boxes until installation to prevent damage at
the job site.
Installation of the shunt-trip insulated operating shafts
should be performed following Step 15 on page 17. Conduit
and control wiring from the switch operator to the shunt-
trip solenoid housings—to be furnished by the user—may
be installed any time after the circuit-switcher pole-units
have been permanently mounted in place. Conduit size
should be one inch (25 mm) minimum. Control wiring for
the shunt-trip solenoids should be left disconnected at
the switch operator end until Step 5 on page 26 has been
completed. Refer to S&C Instruction Sheet 711-600 for
recommended wire sizes for the control wiring.
Mounting Pedestals
The high operating speed, which makes possible many
of the Mark V Circuit Switcher's superior performance
features when power-operated, brings about high accel-
eration and deceleration rates, resulting in high dynamic
forces. S&C Mounting Pedestals were specifically designed
for these forces, and are therefore highly recommended.
Alternately, circuit-switchers can be installed on a user's
steel pedestal or supporting structure, which must meet
specific static and dynamic deflection limits shown in S&C
Data Sheet 711-300, so the dynamic forces will be absorbed
by the pedestal and not transferred to the adjoining bus,
other apparatus, and the bushings. Install S&C mounting
pedestals per the included dimensional drawing.
Shipping and Handling

Handling

NOTICE
Do not intermix components from different
installations
S&C maintains an historical record, by serial number,
of every circuit-switcher produced� This record lists
information pertinent to each instal lation, such as
application, date of shipment, and any service performed
by S&C factory service specialists� This record is
invaluable when questions arise relative to modifications
or replacements� It is important, therefore, that various
compo nents belonging to a specific circuit-switcher
installation not be intermixed with components belonging
to a different installation�
For this reason, each circuit-switcher is serially
numbered� This serial number is stamped on the
nameplate affixed to the mounting-frame weldment
and also on the nameplate affixed to the switch operator
(or the manual geared operating handle if the circuit-
switcher is manually operated)�
To facilitate identification during erection, the serial
number, the sales-order number, and the erection-
drawing (ED) number are marked on the circuit-switcher
mounting-frame weldment and on the switch operator
shipping crate, and on all crates, boxes, and bundles for
the other components associated with the installation�
Please complete and mail the circuit-switcher registration
card (enclosed in the water-resistant envelope) after
the circuit-switcher has been installed� The information
requested on this card is vital to ensure prompt notification
in the event field modifications are needed
WARNING
Do not remove the protective shields around the
interrupters until the installation is complete� Interrupters
are pressurized to 75 PSIG� Failure to keep the shields in
place during installation may cause equipment damage
or serious personal injury�
S&C Instruction Sheet 711-510 9