SPECIFICATIONS
AUTO Reset
MANUAL Reset
RESTART DELAY
A2644
A2644M
A2644R
B2644
B2644M
B2644R
C2644
C2644M
C2644R
D2644
D2644M
D2644R
EX2644
EX2644M
EX2644R
Nominal AC Voltage
(phase to phase)
120VAC 208/240VAC 480VAC 575VAC 380VAC
Adjustment Range 85-120V 160-240V 380-480V 450-575V 300-400V
Frequency 60 Hz 60 Hz 60 Hz 60 Hz 50 Hz
Power Consumption
0.75W 1.5W 4.5W 7.5W
4.5W
Transient Protection 2500 VRMS for 10msec
Repeat Accuracy
± 0.1% of setpoint (fixed conditions)
Response Time
Adjustable 0.2 to 20 seconds ±10%
Dead Band Approximately 2%
Output Contacts DPDT 10 amps at 240VAC resistive
Expected Relay Life Mechanical: 10 million operations
Electrical: 100,000 operations at rated load
Operating Temp - 40° to +131° F
Humidity Tolerance 0 - 97% w/o condensation
Enclosure Material ABS plastic
Mounting Surface
Weight
9.5 oz
Agency Approvals All versions UL Recognized and CSA Certified
DESCRIPTION
The Model 2644 3-Phase Monitor continuously monitors 3-
phase 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.
ll Detects Phase Loss, Low Voltage
and Phase Reversal
ll Optional Restart Delay
ll Automatic or Manual Reset
ll 5 Year Unconditional Warranty
MODEL 2644
3-Phase Monitor
DIMENSIONS
TIME MARK is a division of
Telephone: Main - (918) 438-1220
Sales - (800) 862-2875
Fax: (918) 437-7584
E-mail: sales@time-mark.com
Internet: http://www.time-mark.com
Doc No. 87A146 12/00
© 2000 TIME MARK CORPORATION
11440 East Pine Street
Tulsa, Oklahoma 74116
Manual Reset Button
(manual version only)
5.5"
3.88"
2.08"
6.06"
3.0"
.203" dia. typ.
5.5"
3.88"
3.0"
.203" dia. typ.
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