SPECIFICATIONS
Model A246 B246 EX246
Nominal AC Voltage 120 208/240 380
Adjustment Range
Low:
High:
85-125 V
110-140 V
160-260 V
210-280 V
300-400 V
350-450 V
Frequency 60 Hz 60 Hz 50 Hz
Power Consumption (per phase) 1 W
1.5 W
2 W
Transient Protection 2500V for 10 msec
Repeat Accuracy
±0.1% of set point (fixed conditions)
Response/Reset Time 50 msec
Reset type Automatic
Dead Band 2%
Contact Rating SPDT 10A at 240VAC resistive
Expected Relay Life Mech: 10 million operations
Elec: 100,000 at rated load
Operating Temperature - 40º to +131º F
Humidity Tolerance 0-97% w/o condensation
Enclosure Material ABS plastic
Weight 6 oz.
Mounting 8-pin socket *order separately
Agency approval CSA CSA
* Order 8-pin socket number 51X120
DESCRIPTION
The Model 246 3-Phase Monitor is designed to
continuously monitor 3-phase power lines for phase
loss, phase reversal, low voltage and high voltage. This
device features solid-state voltage and phase angle
sensing circuits, which drive a SPDT electromechanical
relay. A neutral is not required, allowing the Model 246
to be used with either Wye or Delta systems.
Three versions of the Model 246 cover the 120 and
208/240VAC, 60 Hz and the 380VAC, 50 Hz. In
addition, the models A246 and B246 are now CSA
Certified.
Each option on the Model 246 monitor is adjustable
throughout its operating range. The adjustment pots
and LED indicators for OVER VOLTAGE and UNDER
VOLTAGE are mounted on the front of the unit for easy
access.
DIMENSIONS
TYPICAL APPLICATION
ll Monitors for Phase Loss or
Reversal, Low and Over Voltage
ll Automatic Reset
ll CSA Certified
ll 5 Year Unconditional Warranty
MODEL 246
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. 87A112 12/00
© 2000 TIME MARK CORPORATION
11440 East Pine Street
Tulsa, Oklahoma 74116
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