Red Lion APMR - Manual (Page 3)

3
SETUP
1. Adjust the dials on the APMR to
the following settings:
a. Under Voltage to minimum
(CCW)
b. Under Voltage Delay to
minimum (CCW)
c. % Unbalanced to maximum
(CW)
2. Connect input wire from the
fused 3 phase line voltage to
Terminals 7 (L1), 9 (L2), and 11
(L3). In Wye systems,
connection to neutral wire is not
required. Do not wire output
contacts until Step 9.
3. TURN POWER ON. When the internal relay energizes, and the Red LED
glows green, the phase sequence is correct and the voltages on all three
phases are above the minimum under voltage setting.
a. If the internal output relay does not energize, and the LED stays red, TURN
POWER OFF and swap any two (2) of the three (3) input wires. This
corrects the phase sequence if the monitor was connected in reverse rotation.
Note: Insure that the motor is wired for correct rotation.
4. Select the proper under voltage trip point. (This is the dial marked Under
Voltage.) The under voltage setting should be the same as the minimum
operating voltage for the equipment to be protected.
Note: If the recommended setting is not known, turn the Undervoltage
adjustment knob CW until the relay de-energizes and the LED glows red.
Turn the knob CCW until the relay energizes and the LED glows green.
This procedure assumes that the line voltages are at an acceptable level
when the adjustments are made.
5. Set the Under Voltage Delay to the desired value. This is the maximum time
period that an under voltage condition can exist before de-energizing the
internal relay. The exact value of the delay depends on the type of equipment
being protected and the quality of the available three phase power. A setting
too low, will cause unnecessary interruptions due to momentary dips in the
line voltage. On the other hand, if the time delay is too long, damage to the
equipment can occur before a legitimate under voltage condition is detected.
Three phase motors have a starting current that is many times higher than
the normal full load current but lasts for only a few seconds. Setting the
delay slightly longer than the duration of this inrush period will prevent the
APMR from being tripped due to a low voltage condition caused by the
starting current.
Note: The under voltage delay applies only to under voltage conditions.
Exceeding the phase unbalance trip setting or a phase loss will de-
energize the relay instantly regardless of the delay setting.
6. Phase Unbalance setting. Maximum permissible unbalance and phase
voltages that most three phase powered equipment can tolerate are very
seldom specified. In most locations, three phase voltages typically are not
perfectly balanced. Use your own discretion when setting this value. Too low
of a setting (CCW) can cause unnecessary tripping. Too high of a setting
(CW) does not provide adequate protection.
An alternative procedure is to turn the Unbalance adjustment CCW until the
relay de-energizes and the LED turns red. Turn the knob CW until the relay
energizes and the LED turns green.
Note: This procedure assumes that the line voltages are sufficiently balanced
when the adjustments are made. % Voltage Unbalance is defined by NEMA
as: [(Maximum Deviation From Average Voltage/Average Voltage) X 100]
where Average Voltage = (L1 + L2 + L3)/3.
Note: NEMA recommends not to operate motors with a phase unbalance
greater than 5%.
7. When the phase sequence is correct and the line voltages are within preset
limits, the internal relay of the APMR will energize. The LED indicator
glows green to show a normal condition.
8. TURN POWER OFF. Refer to the wiring diagram for proper output contact
connections.
9. After proper connections are made, TURN POWER ON. The internal relay
energizes allowing the monitored load to become active.
G Rail Installation
To install the APMR on
a “G” style DIN rail,
angle the module so that
the upper groove of the
“foot” catches under the
lip of the top rail. Push the
module toward the rail
until it snaps into place.
To remove a module from
the rail, push up on the
bottom of the module
while pulling out away
from the rail.
T Rail Installation
To install the APMR on a
“T” style rail, angle the
module so that the top
groove of the “foot” is
located over the lip of the
top rail. Push the module
toward the rail until it snaps
into place. To remove a
module from the rail, insert
a screwdriver into the slot on
the bottom of the “foot”, and
pry upwards on the module
until it releases from the rail.
INSTALLATION
The unit is equipped with a universal mounting foot for attachment to standard DIN style
mounting rails, including G profile rail according to EN50035 - G32 , and top hat (T) profile rail
according to EN50022 - 35 x 7.5 and 35 x 15.
The unit should be installed in a location that does not exceed the maximum operating
temperature and provides good air circulation. Placing the unit near devices that generate
excessive heat should be avoided.