Installation procedure
When untanking the recloser for inspection prior to
installation, remove the four bolts that secure the tank
and head casting. Trip the recloser and carefully lift the
mechanism out of the tank.
1.
Check oil level .
Before installing the recloser, check for
proper oil level. With the mechanism removed from the
tank, the oil level should be up to the fill line marked on
the tank liner.
2.
Test oil dielectric strength .
If the recloser has
been stored for some time or is being relocated,
perform a dielectric test on the oil in accordance with
ASTM- approved testing procedures.
A. On new equipment, the oil must have a minimum
dielectric strength of 26 kV.
B. If the dielectric strength of the oil is less than 26
kV, filter the oil to restore its dielectric strength to
an acceptable minimum level.
3.
Replace head casting and mechanism in tank .
A. Wipe clean the O-ring type gasket, the gasket
recess in the recloser head, and the tank gasket.
B. Position and tighten the four head bolts alternately.
The cover can be rotated to accommodate
installation. Torque each head bolt to 11-16 ft-lbs.
C. Operate the unit manually eight times to ensure
that no air remains in the hydraulic mechanism.
4.
Test mechanical operation .
An effective test can be
performed as follows:
A. Move the yellow manual operating handle to the
CLOSED position and wait at least 4 minutes.
B. Move the manual operating handle to the OPEN
position and listen for opening of the main
contacts. (A dull “clunk” will be audible.) Then
quickly move the lever back to the CLOSED
position.(A metallic “click” can be heard.)
C. Continue opening and closing the recloser manually
until lock-out is achieved. This can be determined by
listening for unlatching of the lock-out mechanism
and also by noting that the recloser mechanism
will not latch when the operating handle is moved
to the CLOSED position. This test can be used to
determine the number of operations to lock-out.
The number of fast and delayed operations can
also be identified. With fast operations, the main
contacts will open almost instantaneously when the
operating handle is moved to the OPEN position,
while, with delayed operations, a short time elapses
between opening of contacts and placement of the
operating handle in the OPEN position.
5.
Check data plates .
Make sure the ratings and
settings on the recloser data plates are correct for the
planned installation.
6.
Mount the recloser .
7.
Ground the recloser .
Make the ground connection to
the recloser ground connector (located 4” from the
bottom of the tank).
Line installation
Provide the recloser with bypass switches and surge
protection as shown in Figure 8. Surge protection on both
sides of the recloser is advisable. If surge protection is
provided on only one side,though, it should be located on
the
source side for line installations
and on the
load side
for substation installations .
Connect the primary leads to the recloser. The source-side
bushing is located above the sleet hood. To facilitate
connection, rotate the cover of the recloser in 90-degree
increments, as required. The universal clamp-type terminals
accept No. 6 through 350-mcm conductors (No. 8 through
2/0 for Type H reclosers).
WARNING
This equipment is not intended to protect human
life . Follow all locally approved procedures and safety
practices when installing or operating this equipment .
Failure to comply can result in death, severe personal
injury and equipment damage .
G102 .1
CAUTION
This equipment relies on dielectric fluid to provide
electrical insulation between components . The dielectric
strength of the fluid must be checked on a regular basis,
as part of the routine maintenance inspection, to ensure
that it is at or above minimum dielectric requirements .
Use of this equipment with dielectric fluid that does
not meet minimum requirements can result in internal
flashovers that will damage the equipment and can
cause personal injury .
G107 .3
CAUTION
Falling equipment . Use the lifting lugs provided and
follow all locally approved safety practices when lifting
and mounting the equipment . Lift the unit smoothly
and do not allow the unit to shift . Improper lifting
can result in severe personal injury, death, and/or
equipment damage .
G106 .3
WARNING
Hazardous voltage . Solidly ground all equipment . Failure
to comply can result in death, severe personal injury,
and equipment damage .
T223 .2
7
Types E, 4E, V4E, H, 4H, V4H, L, and V4L single-phase recloser installation and operation instructions
OPERATION INSTRUCTIONS
MN280051EN May 2017
