S280-30-7
3
Figure 2.
Untanked Type VW vacuum recloser.
INTRODUCTION
Service Information S280-30-7 provides the maintenance
instructions for Type VW, VWV27 and VWV38 three-phase,
hydraulically controlled, vacuum reclosers. Included is a gen-
eral description of the recloser and its operation, instructions for
periodic inspection and routine maintenance, testing proce-
dures, and instructions for shop repairs. A service parts list,
keyed to exploded-view drawings of the recloser is included at
the back of the manual.
DESCRIPTION AND OPERATION
General
The Type VW, VWV27 and VWV38 reclosers are self-controlled
devices that sense and interrupt distribution system fault cur-
rents. They automatically reclose to restore service if the fault is
temporary and then reset for another programmed sequence of
operations. If the fault is permanent the recloser locks open
after one, two, three or four operations, depending upon its
operating settings. All three phases open, close, and lock out
simultaneously.
Opening sequences of these reclosers can be all fast, all
delayed, or any combination of fast followed by delayed opera-
tions; up to the maximum of four operations. On coordinated
systems, fast operations clear temporary faults before branch-
line fuses can be damaged. Delayed openings allow time for
fuses or other downline protective devices to clear so that per-
manent faults can be confined to smaller sections of line
Closing energy, as well as energy to charge the opening
springs, is supplied by a high-voltage closing solenoid which is
momentariIy connected phase-to-phase through a high-voltage
contactor.
A “trip-free” yellow operating handle, located under the sleet
hood, will manually lock open the recloser. It cannot manually
close the recloser, but must be in the CLOSED position for the
closing solenoid contactor to operate. A red contact position
indicator, linked to the recloser mechanism but independent of
the yellow operating handle, is also located under the sleet
hood.
The location of the major components of a VW recloser are
shown in Figure 2. They are similar for the VWV27 and VWV38
reclosers. Being aware of the location of these components and
their operation will provide a quicker and clearer understanding
of the recloser maintenance and repair procedures that follow.
Manual Operating Handle
When the recloser operates to lockout, the (yellow) manual
operation handle drops down (“trips-free”) from under the sleet
hood, to give a visual indication of recloser lockout. The handle
must be reset manually before the recloser can be closed. Lift-
ing the handle up mechanically closes the closing solenoid con-
tactor, and if power is available to the closing coil circuit, the
closing solenoid will energize, resetting the recloser.
A closed recloser can be manually opened and locked out by
pulling down the yellow handle.
Non-Reclosing Lever
The non-reclosing lever provides the capability for locking out
the recloser on the first trip operation regardless of the pro-
grammed number of operations to lockout.
Contact Position Indicator
The red arrow-like contact position indicator flag is coupled to
the recloser mechanism to show the position of the main con-
tacts. When the flag is down, the vacuum interrupter contacts
are open; when the flag is up, the contacts are closed.
84603KMA
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