TIME MARK 24 Quick Start Manual

MODEL 24
3-Phase Monitor
with Adjustable Trip & Restart Delays
⚫ 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.
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.
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

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
The Model 24 includes
The

SPECIFICATIONS

Auto Reset Models
Manual Reset Models*
Operating Voltage
Power Consumption
Frequency
Type of Measurement
Under Voltage
Trip
Reset
Over Voltage
Trip
Reset
Voltage Unbalance
Trip
Reset
Trip Delay Time
Over, Under, & Unbalanced
Single-Phasing Faults
Unbalance > 15%
Restart Delay
Manual Reset Input*
Output Contacts
Operating Temp
Humidity Tolerance
Enclosure
Mounting
Weight
Low Current Options
* External N.C. momentary pushbutton required for manual reset.
**Order 11-pin socket number 51x016

DIMENSIONS

24 24-L
24M 24-LM
190-240 VAC 95-120 VAC
1.3W at 240V 3.7W at 120V
50/60Hz
RMS
(% of setpoint)
90% ±1%
93% ±1%
(% of setpoint)
110% ±1%
107% ±1%
(conforms to NEMA)
2-8%, adjustable
Trip setting minus 0.7%
1-30 sec., adjustable
1 sec., fixed
1 sec., fixed
1-500 sec., adjustable
5V open circuit/500µA short circuit
DPDT 8A at 240VAC resistive
- 20º to +140º F
0-97% w/o condensation
Noryl plastic
11-Pin Socket
(**sold separately)
9.5 oz.
Models ordered with suffix "/SG"
have silver with gold flash contacts
1 1 4 4 0 E a s t P i n e S t r e e t
Tu l s a , O k l a h o m a 7 4 1 1 6
01/2023
© 2023
TIME MARK CORPORATION