Datasheet

www.symcom.com • 800-843-8848 • fax: [phone]
24
Available Models:
Features:
• Low voltage trip
• High voltage trip
• Single-phase trip
• Reverse-phase trip
• Fixed 6% voltage unbalance trip
• Single LED diagnostics
• Adjustable restart delay
• Manual reset selection
• DPDT relay output
• Separate indicators for:
• Power-up restart delay
• Reverse-phase trip
• Good voltage/relay energized
• Unbalance/single-phase trip
• High/low voltage trip
A pprovals:
250A
250-600
250A-MET
250-100-MET
Specications
The Model 250A
is a 3-phase, auto-ranging, dual-range voltage
monitor that protects 190-480VAC, 50*/60Hz
motors regardless of size. The product provides
a user selectable nominal voltage setpoint and the
voltage monitor automatically selects between the
200V and 400V range.
This unique microcontroller-based voltage and
phase-sensing device constantly monitors the
3-phase voltages to detect harmful power line
conditions. When a harmful condition is detected,
the MotorSaver’s output relay is deactivated after
a specified trip delay. The output relay reactivates
after power line conditions return to acceptable
levels. The Model 250A includes advanced single
LED diagnostics. Five different light patterns
distinguish between faults and normal conditions.
Note:
The Models 250A-MET and 250-100-MET have
special characteristics. The left-hand relay operates
as normal and the right-hand relay only operates
on a reverse-phase condition. The low voltage trip
point is fixed at 85% of nominal voltage setting
instead of 90%, and they do not provide high
voltage protection.
For more information see:
See Appendix A, page 68, Figure 7 for dimensional
drawing.
See Appendix B, page 75, Figure 19 for typical
wiring diagrams.
Model 250A
3-phase voltage/phase monitor, panel mount, adjustable or manual restart delay,
2 Form C relay contacts
3-Phase Voltage Monitor
Output Characteristics
Output Contact Rating (DPDT - 2 Form C)
Pilot Duty .....................................480VA @ 240VAC
General Purpose ................................10A @ 240VAC
General Characteristics
Temperature Range .............................-40° to 70°C (-40° to 158°F)
Trip & Reset Accuracy ..........................±1%
Maximum Input Power ..........................5 W
Relative Humidity ..............................Up to 95% non-condensing per IEC 68-2-3
Terminal
Torque ........................................7 in.-lbs.
Wire Size ......................................12-18AWG
Transient Protection (Internal) ....................IEC 61000-4-5;1995 ±6kV
Safety Marks
UL ............................................UL508 (File #E68520)
CSA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22.2 No. 14 (File #46510)
CE ............................................IEC 60947-6-2
Dimensions ....................................2.93”H x 5.27”W x 2.95”D
(74.4 x 133.9 x 74.9mm)
Weight ........................................1.02 lb. (16.32 oz., 462.66 g)
Mounting Method ..............................#8 screws
*Note: 50Hz will increase all delay timers by 20%.
Input Characteristics
Line Voltage
250A, 250A-MET ...............................190-480VAC
250-600 ........................................475-600VAC
250-100-MET ...................................95-120VAC
Frequency .....................................50*/60Hz
Functional Characteristics
Low Voltage (% of setpoint) (250A and 250-600)
Trip ...........................................90%
Reset ..........................................93%
Low Voltage (% of setpoint) (250A-MET and 250-100-MET)
Trip ...........................................85%
Reset ..........................................88%
High Voltage (% of setpoint) (250A and 250-600 only)
Trip ...........................................110%
Reset ..........................................107%
Voltage Unbalance (NEMA)
Trip ...........................................6%
Reset. .........................................4.5%
Trip Delay Time
Low Voltage, High Voltage ......................4 seconds
Unbalance, Phasing Faults .......................2 seconds
Restart Delay Time
After a Fault or Complete Power Loss .............Manual, 2-300 seconds adj.
CATALOG_SYMCOM_2014.indd 24 6/10/14 11:06 AM