Time Mark 2644 Data Sheet
MODEL 2644
TIME MARK is a division of
Manua l Reset Bu tton
(ma nual ver sion on ly)
5.5"
3.88"
2.08"
6.06"
3.0"
.203" dia. typ.
.47"
5.5"
3.88"
3.0"
.203" dia. typ.
3-Phase Monitor
Detects Phase Loss, Low Voltage
and Phase Reversal
Optional Restart Delay
Automatic or Manual Reset
5 Year Unconditional Warranty
DESCRIPTION
The Model 2644 3-Phase Monitor continuously monitors 3phase Wye or Delta systems for abnormal conditions.
The solid-state electronic sensing circuitry drives an internal
DPDT relay, allowing the Model 2644 to operate two motor
control circuits, or a control circuit and an alarm circuit. An
adjustable trip delay reduces nuisance tripping caused by
momentary voltage fluctuations on motor start-up.
An optional restart delay gives approximately a 3.5 minute
delay when the relay drops out, to allow compressor head
pressures to bleed off, in the event of short-term power
failures.
Voltage adjustment ranges are sufficiently wide to allow for
proper calibration to existing conditions. Both TRIP and
NORM indicators are provided to aid in adjustment and
system troubleshooting.
Automatic and manual reset versions are available. The
Model 2644 Monitor is not sensitive to line current, and can
be used with any size motor or compressor.
DIMENSIONS
SPECIFICATIONS
AUTO Reset
MANUAL Reset
RESTART DELAY
Nominal AC Voltage
(phase to phase)
Adjustment Range 85-120V 160-240V 380-480V 450-575V 300-400V
Frequency 60Hz 60Hz 60Hz 60Hz 50Hz
Power Consumption
Transient Protection 2500 VRMS for 10ms
Repeat Accuracy
Response Time
Dead Band Approximately 2%
Output Contacts DPDT 10 amps at 240VAC resistive
Expected Relay Life Mechanical: 10 million operations
Operating Temp - 20° to +131° F
Humidity Tolerance 0 - 97% w/o condensation
Enclosure Material ABS plastic
Mounting Surface
Weight
Agency Approvals All versions UL Recognized and CSA Certified
A2644
A2644M
A2644R
120VAC 208/240VAC 480VAC 575VAC 380VAC
0.75W 1.5W 4.5W 7.5W
Electrical: 100,000 operations at rated load
B2644
B2644M
B2644R
± 0.1% of setpoint (fixed conditions)
Adjustable 0.2 to 20 seconds ±10%
C2644
C2644M
C2644R
9.5 oz
D2644
D2644M
D2644R
EX2644
EX2644M
EX2644R
4.5W
11/2011
© 2011 TIME MARK CORPORATION
MODEL 2644
TIME MARK is a division of
3-Phase Monitor
READ ALL INSTRUCTIONS BEFORE INSTALLING, OPERATING OR SERVICING THIS DEVICE.
KEEP THIS DATA SHEET FOR FUTURE REFERENCE.
GENERAL SAFETY
POTENTIALLY HAZARDOUS VOLTAGES ARE PRESENT AT THE TERMINALS OF THE MODEL 2644.
ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.
THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.
Installation Instructions
INSTALLATION
Turn both adjustment control potentiometers fully counterclockwise.
Connect the 3-phase wires to the terminals marked A, B
and C.
Connect the control wires to the terminals with the relay
contact markings. The contact markings on the unit are
the failed or tripped condition of the contacts. Apply
power.
If the contacts do not transfer when power is applied
(TRIPPED indicator on; NORMAL indicator off), press the
RESET button and check that all three phases are present
and of the correct voltage.
If all phases are correct, remove power from the unit,
reverse any two of the A, B or C terminal wires (phase
rotation is reversed), and re-apply power. The contacts
should then transfer.
ADJUSTMENT PROCEDURE
Rotate the TRIP DELAY adjustment pot counter-clockwise.
Rotate the FAILURE LEVEL adjustment pot clockwise until
the unit trips (NORMAL indicator off; TRIPPED indicator
on).
Slowly rotate the FAILURE LEVEL adjustment pot counterclockwise until the unit resets (TRIPPED indicator off;
NORMAL indicator on). On 2644R versions there will be
3.5 minutes delay before NORMAL comes back on.
Set the TRIP DELAY adjustment to the desired amount of
delay to prevent nuisance trips.
These adjustment settings will be correct for most
applications. Should nuisance trips occur, even with the
TRIP DELAY set, turn the FAILURE LEVEL adjustment pot
slightly farther counter-clockwise. Any adjustments should
be made in very small increments.
TYPICAL APPLICATION
Shows No Power Applied
TROUBLESHOOTING
Should the Model 2644 3-Phase Monitor fail to operate
properly, check that three phases are present and are of
the correct voltage and phase rotation (a Time Mark Model
108A or 108B Phase Sequence Detector should be used to
verify phase rotation). Check all fuses, and verify that all
wiring connections are correct. Should problems persist,
contact your local Time Mark Distributor, or the factory for
further assistance.
WARRANTY
This product is warranted to be free from defects in
materials and workmanship, and is covered by our
exclusive 5-year Unconditional Warranty. Should this
device fail to operate for any reason, we will repair it for
five years from the date of manufacture. For complete
warranty details, see the Terms and Conditions of Sales
page in the front section of the Time Mark catalog or
contact Time Mark at 1-800-862-2875.
11/2011
© 2011 TIME MARK CORPORATION
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