PASCOR ATLANTIC DR7, Руководство пользователя

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Step 2—Assemble Insulators
In some cases, involving higher voltage
switches, the installer may choose to mount the
switch bases on the structure before assembling
the insulators. In such cases the switch bases
should be mounted on the supporting structure in
the positions shown on the installation drawing.
Verify that the base for the drive phase is in the
correct location and operating cranks are at their
proper angles. Working on one end of the switch
base at a time remove the bolts holding the
switch cranks to the head of the rotor bearing.
Using these same bolts mount the insulators on
the top of the cranks, being careful not to change
the angular position of these cranks. These
cranks were mounted in the proper position at
the factory and should not be changed.
(Fig 3) shows a typical switch base with the
crank orientation for the switch in the closed
position. The base on the driven phase will
usually contain an additional crank.
Step 3—Insulator Stack Alignment
Lower voltage switches 8.25 thru 72.5kV
generally do not require insulator stack
alignment. Where required, the insulator stacks
of switches thru 242kV can be aligned using
open-end shims or leveling screws and/or
adjusting nuts (Fig. 1) if supplied (optional).
• If using shims, place the shims under the
insulator supports (rotor bearing or spacer
mounting flange) where the bolts secure the
rotor bearing or spacer mounting flange to
the switch bases.
• If optional leveling screws and/or adjusting
nuts have been supplied, as shown in Fig. 1,
adjust the leveling screw and/or adjusting
nut to align the insulator stacks. Loosen all
hardware before jacking to prevent binding.
Step 4—Mount Current Carrying Parts
Refer to fig 3 and with cranks in the switch
closed position, assemble the current-carrying
parts on the insulator stacks with the bolts
provided. Normally, the blade end of the switch
is mounted at the end of the switch, where the
interphase rods are installed. However, the
switch may be operated from the jaw end
Fig. 4 Jaw Contacts
Fig. 3 Typical Set of Base Parts