INSTALLATION
INSTRUCTIONS
Rapid City, SD, USA, 02/2010
MODELS 201A-AU
201-575-AU
Revision B1
II_201A-AU_B1
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
designed to protect 3-phase motors regardless of size. It is used on 190-480VAC (475-600 for
Model 201-575-AU), 50/60 Hz motors to prevent damage caused by single-phasing, low voltage,
high voltage, phase reversal, or voltage unbalance conditions.
CONNECTIONS
READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION.
®
Model 201A-AU is an auto ranging plug-in voltage / phase monitor
1. Locate a convenient location in or near the motor control panel. If the location is wet or
dusty, the MotorSaver
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, and for alarm
operation, connect the normally closed contact in series with the control circuit. See Figure
1 for details.
5. Plug the MotorSaver
®
should be mounted in a NEMA 4 or 12 enclosure.
®
into the socket.
© 2010 SymCom, Inc. All Rights Reserved 2
Figure 1: Typical Wiring Diagram for Control and Alarm
Figure 2: Pin-Out Diagram
© 2010 SymCom, Inc. All Rights Reserved 3
SETTINGS
Rotate the knobs to the appropriate setting for the application following the guidelines below. Do not
apply excessive force when adjusting settings.
L ine Voltage
Rotate the VOLT ADJ. (VAC) knob to the nominal 3-phase line voltage feeding the motor to be
protected.
R estart Delay
Rotate the RESTART (SEC) knob to the desired position. The restart delay is the time between the
MotorSaver® measuring acceptable voltage and closing its output contacts. For compressor
applications, the restart delay should be set for the approximate time it takes for the head pressure to
bleed off of the compressor. For other applications, the restart delay is typically set between 10 and
20 seconds.
T rip Delay
Rotate the TRIP DELAY (SEC) knob to the desired setting. This setting does not affect the trip delay
on single-phasing faults (See SPECIFICATIONS Table). Typically, the trip delay is set between 1 and
5 seconds. In areas where voltage fluctuations are frequent, the trip delay may be set greater than 10
seconds.
V oltage Unbalance
Rotate the UNBALANCE TRIP (NEMA%) knob to the desired unbalance trip level. The NEMA MG1
standard does not recommend operating a motor above 1% voltage unbalance without derating the
motor. The NEMA MG1 standard also recommends against operating a motor above a 5% voltage
unbalance under any circumstances. SymCom recommends consulting the motor manufacturer for
specific tolerances.
Figure 3: Adjustment Knobs
© 2010 SymCom, Inc. All Rights Reserved 4
Calculating Voltage Unbalance
NEMA MG1 Unbalance Formula
% Voltage Unbalance = Maximum Deviation from the Average
Average
Example: The measured line-to-line voltages are 203, 210, and 212.
Average = 203 + 210 + 212
3
The maximum deviation from the average is the largest difference between the average voltage
(208.3) and any one voltage reading.
The maximum deviation from the average is 5.3.
208.3
x 100%
= 208.3
208.3 - 203 = 5.3 210 - 208.3 = 1.7 212 - 208.3 = 3.7
% voltage unbalance = 5.3
x 100 = 2.5% unbalance
© 2010 SymCom, Inc. All Rights Reserved 5
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.
®
will energize its output contacts (open the
Automatic Reset Mode
Set the RESTART (SEC) knob to the desired restart delay time. Apply 3-phase power to the motor.
The MotorSaver’s green RUN light will blink during the restart delay. Once the restart delay time has
expired, the MotorSaver® will energize its output contacts and the green RUN light will illuminate.
Manual Reset Mode
Once power has been applied to the MotorSaver®, set the RESTART (SEC) knob to M to operate in
manual reset mode. When the MotorSaver
®
trips on a fault, the red STATUS light will display the fault
code until the condition clears and the unit is reset by turning the RESTART (SEC) knob away from
the M position until the STATUS light turns green. The RESTART (SEC) knob can then be turned
back to the M position, requiring a manual reset after the next fault occurs. If power is lost before the
MotorSaver® is reset, the fault code will again be displayed once power is reapplied. This allows for
identification of the last fault even after power conditions have returned to normal.
If the contacts do not energize and the RUN light does not turn solid green, see the
TROUBLESHOOTING section.
STATUS
INDICATOR LIGHT
GREEN RUN
GREEN
GREEN
RED
RED
RED
RESTART DELAY (Automatic Reset Mode)
MANUAL RESET REQUIRED (Manual Reset Mode)
REVERSE PHASE
UNBALANCE / SINGLE PHASE
HIGH VOLTAGE
RED LOW VOLTAGE
Table 1: Diagnostic Indicator Lights
© 2010 SymCom, Inc. All Rights Reserved 6
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
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 the specified operating voltage, the
MotorSaver
®
does not have enough power to operate
its internal electronics. If the voltages are correct, call
SymCom at (800) 843-8848 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. Calculate the average according to the NEMA
unbalance formula. If the average voltage is 7% above
the nominal voltage as selected by the LINE VOLTAGE
ADJUST 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. Calculate the average according to the
NEMA unbalance formula. If the average voltage is 7%
below the nominal voltage as selected by the LINE
VOLTAGE ADJUST 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, or the
MotorSaver
®
is timing through the restart delay
®
is in manual reset mode and requires a
manual reset to energize its contacts.
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 7
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 8
MOTORSAVER® 201A-AU SPECIFICATIONS
Functional Characteristics
Low Voltage Trip 90% of setting Reset 93% of setting High Voltage Trip 110% of setting Reset 107% of setting Voltage Unbalance Trip 2-8% Reset Trip setting - 1% (5-8%)
Trip Delay High/Low Voltage and Unbalance 1-30 seconds, adjustable Single-Phasing 1 second, fixed Restart Delay 1-500 seconds, adjustable; Manual
Input Characteristics
Line Supply Voltage 201A-AU 190-480VAC 201-575-AU 475-600VAC 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 of
Hi-Potential Test Meets UL508 Safety Marks
UL listed (OT08 octal socket required) UL508 (File #E68520) 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
Trip setting - 0.5% (2-4%)
-40° to 70°C (-40° to 158°F)
line-to-ground
6kV line-to-line
(2 x rated V +1000 V for 1 minute)
1
The ambient air temperature is the air temperature directly surrounding the product.
© 2010 SymCom, Inc. All Rights Reserved 9
NOTES
© 2010 SymCom, Inc. All Rights Reserved 10
NOTES
© 2010 SymCom, Inc. All Rights Reserved 11
For warranty information, please see Terms and Conditions at
www.symcom.com
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800-843-8848
© 2010 SymCom, Inc. All Rights Reserved 12
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