TIME MARK 24 User manual

MODEL 24
3-Phase Monitor
with Adjustable Trip & Restart Delays
Telephone: Main - [phone]
Sales - [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: http://www.time-mark.com 01/2023
© 2023 TIME MARK CORPORATION
11440 Ea st Pin e S t r e e t
Tulsa, Oklahoma 74116
SPECIFICATIONS
Auto Reset Models
Manual Reset Models* 24 24M 24-L 24-LM
Operating Voltage 190-240 VAC 95-120 VAC
Power Consumption 1.3W at 240V 3.7W at 120V
Frequency 50/60Hz
Type of Measurement RMS
Under Voltage
Trip
Reset
(% of setpoint)
90% ±1%
93% ±1%
Over Voltage
Trip
Reset
(% of setpoint)
110% ±1%
107% ±1%
Voltage Unbalance
Trip
Reset
(conforms to NEMA)
2-8%, adjustable
Trip setting minus 0.7%
Trip Delay Time
Over, Under, & Unbalanced
Single-Phasing Faults
Unbalance > 15%
1-30 sec., adjustable
1 sec., fixed
1 sec., fixed
Restart Delay 1-500 sec., adjustable
Manual Reset Input* 5V open circuit/500µA short circuit
Output Contacts DPDT 8A at 240VAC resistive
Operating Temp - 20º to +140º F
Humidity Tolerance 0-97% w/o condensation
Enclosure Noryl plastic
Mounting 11-Pin Socket (**sold separately)
Weight 9.5 oz.
Low Current Options Models ordered with suffix “/SG”
have silver with gold flash contacts
⚫Monitors for Phase Loss, Phase Reversal,
Over/Under Voltage and Voltage Unbalance
⚫Two Voltage Options
⚫LED Status Indicators
⚫DPDT Relay Output
⚫11-Pin Socket Mount
DESCRIPTION
The Model 24 is a microcontroller-based universal 3-phase
monitor for protecting 3-phase motors from abnormal power
conditions. It can detect under voltage, over voltage, voltage
unbalance, reverse phase, and single-phasing even when
regenerated voltage is present. The Model 24 includes
adjustable trip and restart delays to prevent nuisance tripping
during power fluctuations and short cycling in compressor
applications. The LED status indicators and adjustment pots
for Voltage Adjustment, % Unbalance, Restart Delay and Trip
Delay are mounted on the front of the unit for easy access.
Automatic or manual restart versions are available. The
Model 24 does not require a neutral connection and can be
used on either Wye or Delta systems.
All versions of the Model 24 are available with optional gold
flashed silver contacts for low current applications.
TYPICAL APPLICATION
* External N.C. momentary pushbutton required for manual reset.
**Order 11-pin socket number 51x016
DIMENSIONS

INSTALLATION
Mount the 11-pin socket in a suitable enclosure. A NEMA-1
rated enclosure, designed for socket-mounted relays is
available from Time Mark Corporation.
Connect 3-phase power to terminals 5, 6, and 7 on the socket.
Connect the load control wiring to the appropriate terminals on
the socket.
When using manual reset versions either connect a N.C.
momentary switch to terminals 2 and 10 for manual reset
operation or leave open terminals 2 and 10 for automatic reset
operation. Refer to wiring diagram for example of typical
application.
NOTE: When installing the Model 24 monitor in areas of high
humidity or contamination, it is recommended that the base area
and all exposed metal parts of the socket be coated liberally with a
good quality silicone grease, such as Dow Corning DC-4 or DC-4X.
Insert the unit into the socket and wipe off excess grease around
the base. This will prevent the entrance of moisture and other
contaminates into the base and socket areas.
PIN DIAGRAM
OPERATION
Set the VOLTAGE adjustment to the nominal operating
voltage. Set the UNBALANCE, RESTART, and TRIP
adjustments as required for the application.
MODEL 24 Universal 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 24.
ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.
THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.
Installation Instructions
Telephone: Main - [phone]
Sales - [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: http://www.time-mark.com 01/2023
© 2023 TIME MARK CORPORATION
11440 East Pi n e S t r e e t
Tulsa, Oklahoma 74116
OPERATION (cont’d)
Automatic Reset Versions
The relay contacts will transfer after applying correct voltage
and phase rotation for the length of the restart delay. The
green LED will blink during the restart delay and will then
remain on indicating the relay contacts have transferred.
Manual Reset Versions
When operating in manual reset mode the restart delay is
disabled and the monitor must always be reset manually after
applying power. Both status lights will blink in unison upon
applying power if the monitor was not in the tripped state prior
to a loss of power.
If a fault condition is detected and the monitor trips, the relay
will remain de-energized until the fault condition clears and
the reset switch is pushed. If the monitor remains in the
tripped state when a loss of power occurs, the fault causing
the trip will be displayed on power up.
Automatic and Manual
Reset Versions
The status of the 3-
phase system is
indicated by the red and
green LEDs as shown
in the LED Status chart:
TROUBLESHOOTING
Should the Model 24 Monitor fail to operate properly, check
that all three voltages are present, and are of the correct
voltage level and phase rotation (a Model 188 Phase
Sequence Detector could be used to verify phase rotation).
Check all fuses and verify that all wiring connections are
correct. If problems persist, contact your local Time Mark
Distributor or the factory for assistance (Monday-Friday, 8
a.m. to 5 p.m. CST)
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.
Manual Reset Automatic Reset