Contact operation test
The following test is meant to verify that the recloser
contacts/mechanism are operating properly. With
recloser tanked:
1. Manually operate recloser to lockout.
2. Slowly raise operating handle to the closed position.
Operate at a uniform rate which will allow the handle
to swing through its complete arc in a period of
approximately 5 to 15 seconds.
3. As soon as the contacts close restrain the downward
movement of the handle. Slowly allow handle to return
to the open position. Again movement should take
approximately 5 to 15 seconds, contact should open.
Contacts should freely close and open while the mechanism
is being slowly operated. If contacts fail to freely open
or close, inspect recloser and repair or replace parts as
required to achieve proper operation.
Advanced maintenance procedures
The operations described in this section should be
performed under the cleanest conditions possible. The repair
work, except for bushing replacement, will be simplified
if the work bench is arranged so the mechanism can be
inverted (bushings down). No special tools are required for
any of the repair procedures.
Bushings
Bushing maintenance generally consists of cleaning the
bushings thoroughly and examining carefully for cracks, or
other damage, while the recloser is untanked for servicing.
Cracked or damaged bushings must be replaced.
The bushings used on the Type V4E recloser are oil filled
and must be replaced as an assembly, recloser untanking is
required to replace these bushings.
The bushings used on the Type V4L recloser can be replaced
with the recloser either tanked or untanked. The following
standards should be used as a guide:
●
●
If a bushing porcelain was damaged while the recloser
was in service, or while in storage, the recloser should
be untanked to replace the porcelain. Water or other
contaminants may have entered the tank (check the tank
liner and test the condition of the oil), the bushing lead
could be damaged (either mechanical damage or from
flashover), or pieces of porcelain may have fallen into in
the tank.
●
●
If a bushing porcelain is chipped during installation or
handling, and it is obvious that no other damage has been
done, it is not necessary to untank the recloser to replace
the porcelain.
Replacing bushing assembly
1. Untank recloser and disconnect appropriate bushing
lead, see Figure 2.
2. Remove three hex-head cap screws and bushing
clamps that secure bushing to head casting. Lift
bushing assembly from head, discard bushing gasket.
3. Twist aluminum clamping ring and remove from old
bushing assembly. If ring is in good condition it may be
reused. If ring is damaged, it must be replaced.
V4E
V4L
Hex head
capscrew
Lockwasher
Flat washer
Lock-
washer
Lower bushing
gasket
Bushing clamps
Split aluminum ring
Hex head
capscrews
Bushing assembly
Flat
washer
Link
Link
Hex nut
Hex
nut
Figure 2 . Bushing replacement
Types V4L and V4E single-phase maintenance instructions
6
MAINTENANCE INSTRUCTIONS
MN280055EN May 2017
