When the phase or ground current exceeds its programmed
minimum-trip value and associated time-current-curve (TCC)
timing, the control initiates the programmed sequence
of recloser tripping and reclosing operations. If the fault
is temporary, the control ceases to command recloser
operations after a successful reclose, and the control resets
to the start of its operating sequence after a preset time
delay. If the fault is permanent, the control performs its
complete programmed sequence of reclose commands
and locks out with the recloser open. Once locked out, the
control must be closed via the operator panel or SCADA
communications. This resets the control to the start of the
operating sequence.
The following chain of events occurs for an operating
sequence of two trips to lockout (one trip on TCC1, one trip
on TCC2):
1. The overcurrent signal is integrated with time on the
selected curve for the first trip operation (TCC1) to
produce the signal which energizes the trip circuit.
2. Energizing the trip circuit connects the supply to the trip
solenoid to open the recloser.
3. Upon opening, the control starts timing on the first
reclosing interval-delay time.
4. Upon expiration of this reclosing interval-delay, a closing
signal is issued from the control, closing the recloser,
and selecting the time-current characteristics for the
second trip operation (TCC2).
5. If current remains above the minimum-trip level, the
recloser will trip on TCC2 and lockout the recloser.
Control front panel
The Form 4D control front panel is illustrated in Figure 3.
The front panel is separated into two clearly identified,
color-coded sections:
Programming Panel: The top portion of the front panel
is used for programming the control and providing LED
status indication.
Operating Panel: The lower portion of the front operating
panel is used for operating the control and recloser.
The control includes a Power Save feature that will turn
off the LEDs and backlit LCD display after 15 minutes
of inactivity at the front panel (no buttons pressed). The
CONTROL OK and HOT LINE TAG LEDs are not affected by
the power save mode. Pressing any key on the front panel
will turn the LCD backlight on and restore all LEDs to their
current on/off states.
The control includes a Reset Menu feature that will cause
the LCD display to revert to the root menu after 15 minutes
of inactivity.
Figure 3. Form 4D Pole-mount control front panel
Programming panel
CAUTION
Equipment misoperation. Use of the control front
panel HMI may result in several combinations of
settings, configurations, and customizations. The user
must ensure that a proper combination is created and
downloaded for the appropriate device application.
G163.0
The Programming panel has the following sections:
LCD display (Figure 4)
The LCD display is a 4-line, 20-character display. The LCD
display panel contrast is field-adjustable to allow for various
mounting heights and applications. Press the FUNC key
and UP or DOWN arrow simultaneously to increase or
decreasecontrast.
The keypad functionality is summarized as follows.
The (up) key can be used for the following tasks:
Scroll to the next item up on the current Menu level.
If already at the first item of the current Menu level,
return to the last item of the current Menu.
4 OPERATION INSTRUCTIONS MN280049EN September 2017
Form 4D Microprocessor-based pole-mount recloser control installation and operation instructions
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