Motor Saver SymCom 460-VBM User manual

BE SURE POWER IS DISCONNECTED PRIOR TO INSTALLATION!
FOLLOW NATIONAL, STATE AND LOCAL CODES.
READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION.
The Model 460-VBM MotorSaver®is an auto-ranging voltage monitor designed to protect 3-phase
motors—regardless of size. It can be used on 190–480VAC, 50/60Hz motors to protect from
damage caused by single-phasing, low voltage, high voltage, phase reversal, and voltage
unbalance.
The Model 460-VBM (Voltage Band Monitor) has low and high voltage adjustment knobs and will
only permit motor operation if the voltage is within these limits.
CONNECTIONS
1. Mount the MotorSaver®in 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. The
MotorSaver®can be mounted to a back panel using two #6 or #8 x 5/8 screws or can be
snapped onto DIN rail.
2. Connect L1, L2 and L3 on the MotorSaver’s terminal strip to the LINE SIDE of the motor starter
(see Figure 1).
3. 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 in
Figure 2.
INSTALLATION INSTRUCTIONS FOR
SYMCOM’S MOTORSAVER®
MODEL 460-VBM
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460
Figure 1. Motor Control Wiring Diagram
LIGHT
460
Figure 2. Alarm Control Wiring Diagram
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SETTINGS
1. LOW VOLTAGE ADJUSTMENT: Rotate the
LOW VOLTAGE ADJ. (VAC) to the desired low
voltage setting. If any of the three phases drops
below this setting, the MotorSaver®will open its
relay contacts after the preset trip delay.
2. HIGH VOLTAGE ADJUSTMENT: Rotate the
HIGH VOLTAGE ADJ. (VAC) to the desired high
voltage setting. If any of the three phases rises
above this setting, the MotorSaver®will open its
relay contacts after the selected trip delay.
3. RESTART DELAY ADJUSTMENT: Rotate the
RESTART (SEC) knob to the desired position.
The restart delay is the time between the
MotorSaver®seeing acceptable voltage and the
MotorSaver®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 2 and 10 seconds.
4. TRIP DELAY ADJUSTMENT: Rotate the TRIP DELAY (SEC) knob to the desired setting. This
adjustment does not affect the trip delay on phasing faults. Typically, the trip delay adjustment
is set between 1 and 5 seconds. In areas where voltage fluctuations are frequent, the trip delay
adjustment may be set greater than 10 seconds.
NEMA MG1 UNBALANCE FORMULA
% Voltage Unbalance = Maximum Deviation from the Average x 100%
Average
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POWER-UP
Turn on the 3-phase power to the motor. The MotorSaver’s green RUN light will blink during the
restart delay. After the restart delay, the MotorSaver®will energize its output contacts and the green
light will illuminate. If the contacts do not energize and the RUN light does not illuminate, see the
TROUBLESHOOTING section.
CONGRATULATIONS!
YOU HAVE JUST INSTALLED THE FINEST MOTOR
PROTECTION AVAILABLE!
DIAGNOSTIC INDICATOR LIGHTS
RUN GREEN
RESTART DELAY GREEN
REVERSE PHASE RED
UNBALANCE / SINGLE
PHASE RED
HIGH / LOW VOLTAGE RED
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TROUBLESHOOTING
SYMPTOM LIGHT
PATTERN SOLUTION
No lights are on—
the unit seems
completely dead N/A
Measure the three line-to-line voltages. If any of the
voltages is below 150VAC, the MotorSaver®does not
have enough power to operate its internal electronics—
this may occur on a single-phased system. If the
voltages are correct, call SymCom at [phone] or
[phone].
Red light is blinking
(on initial power-up) RED
Turn off the 3-phase power. Swap any two leads
powering the MotorSaver®(L1, L2, or L3) There is a 50-
50 chance of connecting L1, L2 and L3 correctly the first
time.
Re-apply 3-phase power.
Red light is blinking
(after the motor has
previously been
running) RED The incoming lines have been reverse-phased. The
MotorSaver®is preventing the motor from running
backwards. Correct the phase sequence.
Red light is blinking in
this pattern RED
The voltage is unbalanced or single-phased. Measure the
incoming line voltages and calculate the % unbalance
according to the formula on page 3. If the voltage
unbalance does not exceed 5% call SymCom at (800)
843-8848 or [phone].
Red light is on steady RED
The voltage is out of tolerance. Measure the three line-to-
line voltages. If any line is above the HIGH VOLTAGE
ADJ. setting or below the LOW VOLTAGE ADJ. setting,
the MotorSaver®is functioning properly. If the voltage is
within the allowed range, call SymCom at [phone]
or [phone].
Green light blinks and
motor is not running GREEN
The MotorSaver®is timing through the restart delay and
will energize its output contacts once it expires. To
manually bypass the delay, momentarily turn the
RESTART knob to the lowest setting.
The restart delay is also used as the power-up delay, so
power-cycling the MotorSaver®will not bypass this delay.
Green light is on
steady, but motor does
not start GREEN The MotorSaver®is in run mode. Ensure other control
devices are allowing the motor to start. Check the control
circuit for loose wires or malfunctioning switches.
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*NOTE: 50Hz will increase all delay timers by 20%
MOTORSAVER
®
460-VBM SPECIFICATIONS
3-Phase Line Voltage 190–480VAC (nominal)
Frequency 50*/60Hz
Low Voltage (adjustable trip point)
Trip 185–480VAC (adjustable)
Reset Trip setting plus 3%
High Voltage (adjustable)
Trip 208-528VAC (adjustable)
Reset Trip setting minus 3%
Voltage Unbalance (NEMA)
Trip 6%
Reset 5%
Trip Delay Time
Low, High and Voltage Unbalance 1–30 seconds (adjustable)
Single-Phasing Faults (>25% UB) 1 second (fixed)
Restart Delay Time
After a fault or power loss 1–500 seconds (adjustable)
Output Contact Rating – DPST
Pilot Duty 480VA @ 240VAC
General Purpose 10A @ 240VAC
Power Consumption 6 Watts (max.)
Weight 14 oz.
Enclosure Polycarbonate
Terminal
Torque 6 in.-lbs. (max.)
Wire AWG 12-20 AWG
Safety Marks
UL UL508 (File #E68520)
CE IEC 60947-6-2
Standards Passed
Electrostatic Discharge (ESD) IEC 1000-4-2, Level 3, 6kV contact, 8kV air
Radio Frequency Immunity,
Radiated 159 MHz, 10V/m
Fast Transient Burst IEC 1000-4-4, Level 3, 3.5kV input power and controls
Surge
IEC IEC 1000-4-5, Level 3, 4kV line-to-line;
Level 4, 4kV line-to-ground
ANSI/IEEE C62.41 Surge and Ring Wave Compliance to a level
of 6kV line-to-line
Hi-Potential Test Meets UL508
(2 x rated V +1000V for 1 minute)
Environmental
Temperature Range Ambient Operating: -40°to 70°C (-40°to 158°F)
Ambient Storage: -40° to 80°C (-40° to 176°F)
Class of Protection IP20, NEMA 1 (Finger Safe)
Relative Humidity 10–95%, non-condensing per IEC 68-2-3
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DIMENSIONS
SymCom, Inc. warrants its microcontroller-based products against defects in material or
workmanship for a period of five (5) years from the date of manufacture. All other products
manufactured by SymCom shall be warranted against defects in material or workmanship for a
period of two (2) years from the date of manufacture. For complete information on warranty, liability,
terms, and conditions, please refer to the SymCom Terms and Conditions of Sale document.
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