DESCRIPTION
The Model 259 3-Phase Monitor is designed to protect
individual 3-phase equipment and motors, when used
alone or in conjunction with shunt trip breakers. When
correct voltage and phase rotation are applied an
internal DPDT relay energizes.
A fault condition (phase loss, phase reversal, or low
voltage) drops out the relay and lights the LED failure
indicator. The Model 259 will detect a phase loss
condition even when regenerative voltage is present.
The Model 259 may be used with Wye or Delta
systems and requires no neutral connection. Standard
operating ranges are available from 120 to 575 VAC, 60
Hz and 380 VAC, 50 Hz.
SPECIFICATIONS
Model A259 B259 C259 D259 EX259
Nominal AC Voltage
(phase to phase)
120VAC 208/240 VAC 480VAC 575VAC 380VAC
Adjust Range (VAC) 85-125 160-260 380-500 450-600 300-400
Frequency 60 Hz 50 Hz
Power Consumption 2.1 W 3.3 W 4.2 W 6.9 W 4.2 W
Transient Protection 2500V for 10 msec
Repeat Accuracy ± 0.1 % (fixed conditions)
Response Time Adjustable 1 to 5 seconds
Reset Time Adjustable 0.2 to 10 minutes
Reset Type Automatic
Dead Band Approximately 2%
Output Contacts DPDT 3A at 480/600 VAC 80% PF
10A at 240VAC 80% PF resistive
Expected Relay Life Mech: 10 million operations
Elec: 100,000 operations at rated load
Operating Temp - 40º to +131º F
Humidity Tolerance 0-97% w/o condensation
Enclosure Material 20 gauge steel
Mounting Surface
Weight 17 oz.
DIMENSIONS
l DPDT 600VAC Output Contacts
l Adjustable Trip & Restart Delays
l Adjustable Voltage Level
l 5 Year Unconditional Warranty
MODEL 259
3-Phase Monitor
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. 87A116 12/00
© 2000 TIME MARK CORPORATION
11440 East Pine Street
Tulsa, Oklahoma 74116
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