Operation Upon Loss of AC Power
The control is equipped with a 13 Amp-Hour 24 VDC lead
acid battery for operation upon loss of AC power. The
control maintains full operation from the battery for a period
of time — 24 hour maximum (20°C)
In the event that the AC power has not returned within the
times listed above, the control will disconnect the battery
from the circuit.
Note:
The control continuously monitors the battery voltage. To
prevent battery damage, the control shuts down
automatically upon detection of low battery voltage
(below 22 VDC) for 60 seconds.
Control programming settings and parameters—including
event recorder—are stored in non-volatile memory and
retained upon loss of control power. The time/date clock
will continue to operate for approximately 30 days after
loss of control power.
Phase B and Y inputs are the factory default connections
for powering the control. If B and Y phases lose AC power,
the red ALARM indicator LED will illuminate, the green
CONTROL OK indicator LED will not be illuminated, and
the ALARM log on the LCD display will indicate NO AC
PRESENT.
The control clock may require resetting if the operating
power has been disconnected for more than thirty days.
Refer to
Service Information S280-70-4 (ProView 4.X.X) or
S280-70-21 (ProView 5.X.X) Form 6 Microprocessor-
Based Recloser Control Programming Guide
for information
on setting the control clock.
Note:
When AC power is present, the control will operate
regardless of back-up battery presence.
Note:
In the event of loss of AC control power to the control
(without battery back-up power), the LS control will be
disabled when power is restored to the control:
• In the TIE Mode, once voltage is restored, the LS is
disabled until locally or remotely enabled. This is to
ensure that the TIE recloser will not close automatically
upon restoration of voltage from one source.
• In the SECTIONALIZING mode, once voltage is
restored, the LS is disabled until locally or remotely
enabled. The recloser remains in the same state prior
to the loss of voltage. The SECTIONALIZING unit will
not close automatically. This also prevents any
automatic closing when auto reset is enabled.
Note:
LS must be enabled via the ProView interface software
Loop Scheme Settings Dialog screen located in the Idea
Workbench.
FORM 6-LS RECLOSER
CONTROL DESCRIPTION
Description
The Form 6-LS pole-mount microprocessor-based recloser
control includes extensive auto-reconfiguration system
protection functionality, including phase, ground, and
negative sequence overcurrent protection, over/
underfrequency, and voltage protection, directionality,
sensitive ground fault, and sync check.
The control is for application in distribution feeder loop
sectionalizing schemes. The Form 6-LS control senses the
loss of voltage, and after a predetermined time delay,
performs the programmed action to restore service to the
affected feeder.
The control can be programmed for either the sectionalizing
or tie mode of operation. The sectionalizing mode senses
voltage on the source side of a normally closed recloser
and is activated upon loss of source-side voltage. The tie
mode of operation senses voltage on both sides of a
normally open recloser and is activated upon loss of
voltage on either side. The tie mode is used for both one-
way and two-way tie applications.
Analysis tools include fault locating, event recording, TCC
Editor II, Idea Workbench, Data Profiler, and oscillography
functions, including oscillography replay.
Metering functions include demand and instantaneous
current on a per-phase basis, instantaneous voltage and
power factor on a per-phase basis, and power (real,
reactive, apparent) on a per phase or total basis.
Symmetrical components for both voltage and current are
displayed along with kilowatt-hours for energy metering.
Harmonics from the 2nd to the 15th harmonic are also
included.
The front panel LCD display is used to configure the
operating settings for the control. It is also used to display
metering, counter information, control parameters, reset
alarms, and provide diagnostic information.
Control parameters can also be programmed via a personal
computer connected to the control through the front panel
RS-232 port. Control programming, interrogation, and
operations are performed with Form 6 ProView interface
software on a personal computer.
ProView interface program software includes additional
functions used to create and graphically display Time
Current Curves and provides the Idea Workbench for
configuring user-selected inputs and outputs, configurable
event and alarm data, and selectable communication
points for serial communication.
The control operates on 50 and 60 Hz systems.
The control can be configured, by the factory or by the
user, for a wide variety of applications. If user requirements
change, the control functions can be modified to meet the
new requirements.
The control is accessible from both the front and back of
the cabinet (Figure 2).
Form 6-LS Pole Mount Recloser Control Installation and Operation Instructions
4
IMPORTANT:
If the the control shuts down due to low
battery voltage before AC power is restored, and the
connected energized recloser is CLOSED; it will only
TRIP and LOCKOUT via front panel pushbutton
command.
A control that has shut down due to low battery voltage
before AC power is restored will have a blank LCD
display (no text message shown) and none of the LEDs
will be illuminated.