PSP8620311
Rev. E
17
Overview
The VERSA-TECH
®
Recloser is a unique
and patented approach to recloser design.
The interrupter, drive mechanism, control,
and housing are raised to the system
potential. The entire assembly is then
insulated from ground using a standard
polymer post insulator. This approach
allows a compact simplified design and also
eliminates the potential for an insulation
breakdown failure.
The fault interruption occurs in the recloser’s
vacuum interrupter. This vacuum interrupter
has state of the art contacts utilizing axial
magnetic fields to interrupt in diffuse mode
for maximum interrupter life. The vacuum
interrupter is supported by an insulating
support housing with bonded epoxy
composite formulation over-molding for
maximum weather resistance.
The drive for the vacuum interrupter is
provided by a mechanism with a magnetic
actuator. The actuator has a rare-earth
neodymium magnet, which provides the
latching and holding force for the vacuum
interrupter in the closed position. A spring
provides the pressure to hold the vacuum
interrupter in the open position. Together
the rare-earth magnet and the spring
arrangement allow the mechanism to be
stable in the open or closed position without
the need for external power. To open the
vacuum interrupter a coil on the magnetic
actuator is pulsed in one direction. To close
the same coil is pulsed in the other direction.
Energy to open and close the recloser is
provided by a set of capacitors.
The control for the recloser is provided by
a microprocessor based electronic circuit.
The control is designed to allow complete
flexibility and user choice of minimum
trip, time-current curves and sequencing
parameters. User access to all parameters
is provided through an RS-232 serial
connection. Current sensing for the control
occurs through a 1000:1 current transformer.
No external transformer power for the
recloser is required. Power for the control
and the mechanism is converted from fault
or load current using two power current
transformers. The open and close capacitors
needed to drive the recloser are charged by
the load or fault current through the power
current transformers. Using this approach
the recloser will continue to open and close
as necessary without the need for external
power or even the hot-stick replaceable
lithium battery pack. The lithium battery
5 — Recloser Operation
pack provides power to the real time clock,
beacon, the remote radio when current
is less than 10A when the Non-Reclose
handle is engaged (See Recloser Operation
Section) and after lockout or manual open.
Automatic Operation
The VERSA-TECH
®
Recloser, when in the
closed position, operates automatically per
the programmed user settings.
Operations Counter*
Refer to Figure 5-1 for Counter location.
Operations counter is an electromechanical
counter, which counts open operations
both manual and automatic initiated by the
control.
*Applicable to VTI only. External operations
counter is not present on the VTLT.
Non-Reclosing Lever/Hot
Line Tag
Refer to Figure 5-1 for the location of
the Non-Reclosing Lever (red lever). The
handle is shown in the normal or UP
position. In this position, the recloser will
follow the automatic sequence it has been
programmed for.
Legacy Versa-Tech I Reclosers
(manufactured July 2011 and
earlier):
The Versa-Tech Programmer User Interface
(UI) allows the programming of the Non-
Reclosing (NR) lever to a single
functionality mode only (Non-Reclose
Mode OR Hot Line Tag mode). If the NR
Mode Only is selected when the red lever is
rotated 90 degrees clockwise to the down
position, the recloser will trip using TCC1
and lockout on any current above minimum
trip. If the Hot Line Tag (HLT) Mode Only is
selected when the red lever is rotated 90
degrees clockwise to the down position, the
recloser will trip instantaneously and lockout
on any current above minimum trip.
Versa-Tech Reclosers manufactured
after July 2011 (Versa-Tech I and
Versa-Tech LT):
The Versa-Tech Programmer User Interface
(UI) allows the programming of the Non-
Reclosing (NR) lever to a dual
functionality mode (Non-Reclose/Hot Line
Tag) or a single functionality mode (Hot Line
Tag Only). When the "Non-
Reclose/Hot Line Tag" option is selected,
the recloser will be in a Non-Reclose mode
when the red lever is rotated to the down
position one time. In the NR mode, the
recloser will trip using TCC1 and lockout
on any current above minimum trip. If the
red lever is rotated to the down position
twice within 30 seconds, the recloser will be
placed in Hot Line Tag mode. The Hot Line
Tag Mode is an instantaneous trip mode.
When the "Hot Line Tag Only" option is
selected, the recloser will always be in Hot
Line Tag mode when the red lever is placed
in the down position.
Note for Versa-Tech I Reclosers with
Firmware 4.xx: For Versa-Tech I Reclosers
with firmware version 4.xx, whenthe recloser
locks out on Hot Line Tag, the solenoid can
be closed only after the Hot Line Tag mode
is disabled. This is accomplished by first
rotating the red lever back to its original
position (UP) and then by pushing the
Manual Handle (yellow handle) back to its
UP position. If the Manual Handle is UP prior
to putting the red lever to the UP position,
the Manual Handle must be pulled DOWN
and then pushed to the UP position in order
for the solenoid to close.
All Versa-Tech I and Versa-Tech LT
Reclosers: Hot Line Tag is an instantaneous
trip mode. As long as the capacitors are
fully charged, the Versa-Tech will trip in
1/2 cycle or 8ms while in HLT. Hot Line Tag
takes precedence over Cold Load Time and
Non-Reclose mode. Cold Load Time takes
precedence over Non-Reclose Mode. The
red lever is also used to turn on the remote
radio (Digi/XBee, SiFLEX, or WiFi) when
line current goes below 10A. To turn on
the remote radio, pull the red lever DOWN
and then push it UP within 30 seconds. the
radio will then automatically shut OFF after
10 minutes of communications inactivity to
minimize battery drain. If the red lever is
left in the DOWN position, the radio will be
powered for 60 minutes before automatically
shutting OFF.
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