DESCRIPTION
The Model 253 Reverse Phase Relay is a solid-state
sensing device designed for installation in equipment
using 3-phase power. This unit is used where it is
desirable to have a contact closure indicating that the
proper phase rotation sequence has been applied.
The relay closes when the proper sequence (ABC) is
applied, but will remain open if any two phases are
reversed. If reverse phasing occurs during operation,
the relay also de-energizes.
The Model 253 has a special industrial grade relay
designed for low power consumption. The ABC
indicator will be illuminated when the proper phase
rotation sequence is applied.
SPECIFICATIONS
Model 253
Nominal voltage 208 - 480 VAC (phase to phase)
Operating range 190 - 480 VAC
Frequency 50 to 60 Hz
Power consumption 2W per phase
Transient protection 2500V for 10 msec
Repeat accuracy
± 0.1% (fixed conditions)
Response time
.05 seconds
Reset time
.05 seconds
Reset type Automatic
Dead Band Approximately 2%
Output contacts SPDT 10A at 240 VAC resistive
Expected relay life Mechanical: 10 million operations
Electrical: 100,000 at rated load
Operating temperature - 40° to +131° F
Humidity tolerance 0 - 97% w/o condensation
Case material ABS plastic
Mounting 8-pin socket *(order separately)
Weight 6 oz.
Agency approval UL Recognized and CSA Certified
* Order 8-pin socket number 51X120
ll Socket-mounted
ll Senses phase reversal
ll Low power consumption
ll UL Recognized; CSA Certified
MODEL 253
Reverse Phase Relay
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. 87A113 12/00
© 2000 TIME MARK CORPORATION
11440 East Pine Street
Tulsa, Oklahoma 74116
DIMENSIONS
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