Time Mark 253 Data Sheet
MODEL 253
TIME MARK is a division of
Reverse Phase Relay
Socket-mounted
Senses phase reversal
Low power consumption
UL Recognized; CSA Certified
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.
DIMENSIONS
SPECIFICATIONS
Model 253
Nominal voltage 208 - 480 VAC (phase to phase)
Operating range 190 - 480 VAC
Frequency 50 to 60Hz
Power consumption 2W per phase
Transient protection 2500V for 10ms
Repeat accuracy
Response time
Reset time
Reset type Automatic
Dead Band Approximately 2%
Output contacts SPDT 10A at 240VAC resistive
Expected relay life Mechanical: 10 million operations
Electrical: 100,000 at rated load
Operating temperature - 20° 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
± 0.1% (fixed conditions)
.05 seconds
.05 seconds
* Order 8-pin socket number 51X120
11/2011
© 2011 TIME MARK CORPORATION
MODEL 253
TIME MARK is a division of
Reverse Phase Relay
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 253.
ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.
THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.
Installation Instructions
WARNING
IN APPLICATIONS WHERE VOLTAGES IN EXCESS OF
300VAC ARE TO BE MONITORED, BE CERTAIN TO USE
THE TIME MARK MODEL 51X120 8-PIN SOCKET, OR AN
EQUIVALENT UL APPROVED 600VAC RATED SOCKET.
INSTALLATION
Refer to the Pin Drawing below, and on the case of the
Model 253. The contacts are shown in the tripped
condition.
Connect wiring to the socket as shown (an 8-pin socket,
rated for at least 480VAC is required).
Refer to the Application Drawing for additional information.
PIN DRAWING
If the relay contacts do not transfer when power is applied
(indicator not lit), check that all three voltages are correct.
If power is present and of the correct voltage, remove
power, then reverse two of the three phase connections at
the socket.
Re-apply power. The contacts should transfer to the
normal condition (pins 1 and 8 closed; indicator lit). There
are no calibrations or adjustments required.
NOTE: When installing the Model 253 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.
TROUBLESHOOTING
Should the relay fail to operate properly, check that all
three voltages are present and are of the correct level.
Check all fuses and verify that all wiring connections are
correct. Should problems persist, contact the factory for
assistance.
TYPICAL APPLICATION
Shows No Power Applied
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.
11/2011
© 2011 TIME MARK CORPORATION
Loading...