INSTALLATION
INSTRUCTIONS
Rapid City, SD, USA, 01/2010
MODELS 201A
201A-9
Revision A1
2880 North Plaza Drive, Rapid City, South Dakota 57702
(800) 843-8848 · (605) 348-5580 · fax (605) 348-5685
BE SURE POWER IS DISCONNECTED PRIOR TO INSTALLATION!
FOLLOW NATIONAL, STATE AND LOCAL CODES.
SymCom’s MotorSaver
READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION.
®
Model 201A is an auto ranging plug-in voltage / phase monitor designed to
protect 3-phase motors regardless of size. It is used on 190-480 VAC, 50/60 Hz motors to prevent
damage caused by single-phasing, low voltage, phase reversal, or voltage unbalance conditions
(high voltage detection is only available with the Model 201A-9).
CONNECTIONS
1. Locate a convenient location in or near the motor control panel. If the location is wet or
dusty, the MotorSaver
®
should be mounted in a NEMA 4 or 12 enclosure.
2. Mount an 8-pin socket to the motor control back panel (SymCom P/N OT08-PC, sold
separately, is required for UL rating).
3. Connect L1, L2 and L3 (terminals 3, 4 & 5 on the relay socket) to the LINE SIDE of the
motor starter as shown in Figure 1.
4. Connect the output relay to the circuitry to be controlled. For motor control, connect the
normally open contact in series with the magnetic coil of the motor starter as shown in
Figure 1. For alarm operation, connect the normally closed contact in series with the control
circuit as shown in Figure 2.
5. Plug the MotorSaver
®
into the socket.
© 2010 SymCom, Inc. All Rights Reserved 2
L1
L2
L3
STOP
Figure 1: Typical Wiring Diagram
L1
L2
L3
LIGHT HORN
Figure 2: Alarm/Horn Wiring Diagram
© 2010 SymCom, Inc. All Rights Reserved 3
SETTINGS
Rotate the LINE VOLTAGE ADJUSTMENT to the nominal 3-phase line voltage feeding the motor to
be protected.
OPERATION
After applying power to the MotorSaver®, the green RUN light will blink during the restart delay. After
the restart delay time has expired, the MotorSaver
normally closed and close the normally open contacts) and the RUN light will turn solid green.
If the contacts do not energize and the RUN light does not turn solid green, see the
TROUBLESHOOTING section.
®
will energize its output contacts (open the
INDICATOR LIGHT STATUS
GREEN RUN
GREEN
RED
RED
RED LOW VOLTAGE
RESTART DELAY
REVERSE PHASE
UNBALANCE / SINGLE PHASE
(SEE EXAMPLE BELOW)
RED
HIGH VOLTAGE (201A-9 ONLY)
Table 1: Diagnostic Indicator Lights
Calculating Voltage Unbalance
NEMA MG1 Unbalance Formula
Average
% Voltage Unbalance = Maximum Deviation from the Average
EXAMPLE: The measured line-to-line voltages are 460, 466, and 490.
Average = (460 + 466 + 490)
3
The maximum deviation from the average is the largest difference between the average
voltage (472) and any one line-to-line voltage.
472 - 460 = 12 472 - 466 = 6 490 - 472 = 18
The maximum deviation from the average is 18.
% voltage unbalance = 18
= 472
x 100 = 3.8%
472
x 100%
© 2010 SymCom, Inc. All Rights Reserved 4
TROUBLESHOOTING
SYMPTOM
No lights are on -
the unit seems
completely dead
Red light is blinking
(on initial power-up)
Red light is blinking
(after the motor has
been running)
Red light is blinking
in this pattern
Red light is blinking
in this pattern
(201A-9 ONLY)
Red light is on
steady
Green light blinks
and motor is not
running
Green light is on
steady, but motor
does not start
LIGHT
PATTERN
GREEN
GREEN
N/A
RED
RED
RED
RED
RED
SOLUTION
Verify L1, L2 & L3 are connected to terminals 3, 4 & 5.
Measure the three line-to-line voltages. If any of the
voltages are below 150VAC, the MotorSaver
®
does not
have enough power to operate its internal electronics. If
the voltages are correct, call SymCom at (800) 8438848 or (605) 348-5580.
Turn off the 3-phase power. Swap any two leads
powering the MotorSaver
50-50 chance of connecting L1, L2 and L3 correctly the
®
(L1, L2, or L3). There is a
first time. Reapply 3-phase power.
The incoming lines have been reverse-phased. The
MotorSaver
backwards. Correct the phase sequence.
®
is preventing the motor from running
The voltage is unbalanced or single-phased. Measure
the incoming line voltages and calculate the %
unbalance according to the procedure outlined earlier
in this document. If the voltage unbalance does not
exceed the % unbalance reset value, call SymCom at
(800) 843-8848 or (605) 348-5580.
The voltage is high. Measure the three line-to-line
voltages. If the average voltage is 7% above the line
voltage adjustment setting, the MotorSaver
®
is
functioning properly. If the voltage is within 7%, call
SymCom at (800) 843-8848 or (605) 348-5580.
The voltage is low. Measure the three line-to-line
voltages. If the average is 7% below the line voltage
adjustment setting, the MotorSaver
®
is functioning
properly. If the voltage is within 7%, call SymCom at
(800) 843-8848 or (605) 348-5580.
The MotorSaver
and will energize its contacts when finished
®
is timing through the restart delay
The MotorSaver® is in run mode. Ensure other control
devices are allowing the motor to start. Check control
circuit for loose wires or malfunctioning switches.
© 2010 SymCom, Inc. All Rights Reserved 5
DIMENSIONS
S
NOTE: Use of the OT08-PC or RB08-PC octal socket, manufactured by Custom Connector Corp., is
required for the MotorSaver to qualify as a UL Listed device. The OT08-PC is 35mm DIN rail
compatible.
2.375
(60.331)
BOTTOM
IDE
.5
(12.7)
1.75
(44.55)
3.15
(80.01)
© 2010 SymCom, Inc. All Rights Reserved 6
MOTORSAVER® 201A SPECIFICATIONS
Functional Characteristics
Low Voltage Trip 90% of setting Reset 93% of setting High Voltage (201A-9 only) Trip 110% of setting Reset 107% of setting Voltage Unbalance Trip 6% Reset 4.5% Trip Delay High/Low Voltage and Unbalance 4 seconds Single-Phasing 2 seconds Restart Delay 2 seconds
Input Characteristics Line Supply Voltage 190 to 480 VAC
Frequency 50/60Hz Output Characteristics Output Contact Rating
Pilot Duty 480VA @ 240VAC General Purpose 10A @ 240VAC
General Characteristics Environmental
Ambient Operating Temperature Relative Humidity 10-95%, non-condensing per IEC 68-2-3 Maximum Input Power 5 W Standards Passed Electrostatic Discharge (ESD) IEC 61000-4-2, Level 3, 6kV contact, 8kV air Radio Frequency Immunity, Radiated 150 MHz, 10V/m Fast Transient Burst IEC 61000-4-4, Level 4, 4kV input power and controls Surge Immunity IEC IEC 61000-4-5, Level 4, 4kV line-to-line; Level 4, 4kV
ANSI/IEEE C62.41 Surge and Ring Wave Compliance to a level
Hi-Potential Test Meets UL508 Safety Marks
UL listed (OT08 octal socket
required) CE IEC 60947-6-2 Dimensions 1.750” H x 2.375” W x 4.125” D (with socket) Weight 9 oz. Enclosure Polycarbonate Mounting Method Plugs into OT08 Socket Wire Gauge 12-22 AWG Solid or Stranded Terminal Torque for P/N OT08 Socket 12 in. - lb
1
-40° to 70°C (-40° to 158°F)
line-to-ground
of 6kV line-to-line
(2 x rated V +1000 V for 1 minute)
UL508 (File #E68520)
1
The ambient air temperature is the air temperature directly surrounding the product.
© 2010 SymCom, Inc. All Rights Reserved 7
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© 2010 SymCom, Inc. All Rights Reserved 8
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