Symcom 777-MV-P2 Installation Guide
INSTALLATION
INSTRUCTIONS
MODEL 777-MV-P2
ELECTRONIC OVERLOAD RELAY
Rapid City, SD, USA, 03/2010
Revision A3
A3
77-MV-P2_
II_7
2880 North Plaza Drive, Rapid City, South Dakota 57702
(800) 843-8848 · (605) 348-5580 · fax (605) 348-5685
TABLE OF CONTENTS
CONNECTIONS .............................................................................................................................3
PROGRAMMING............................................................................................................................7
PROGRAMMABLE PARAMETERS...............................................................................................8
OPERATION.................................................................................................................................11
PROGRAMMING EXAMPLES .....................................................................................................12
SYSTEM DISPLAY.......................................................................................................................14
TROUBLESHOOTING..................................................................................................................15
CLEARING LAST FAULT.............................................................................................................16
TAMPER GUARD.........................................................................................................................16
GROUND FAULT TESTING PROCEDURE.................................................................................17
777-MV-P2 SPECIFICATIONS.....................................................................................................18
2 © 2010 SymCom, Inc. All Rights Reserved
BE SURE POWER IS DISCONNECTED PRIOR TO INSTALLATION!
FOLLOW NATIONAL, STATE AND LOCAL CODES.
READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION. TION.
WARNING!
Hazardous Voltage. Failure to follow these instructions can result in death,
Power must be disconnected prior to attaching and/or using the battery cable.
Damage to the device or serious injury may occur if the battery programming feature is used
while power is applied. Always follow proper safety procedures for removing and securing the
power source before connecting the battery cable.
The battery cable cannot be used when power is applied to the device. To program the device
when it is powered, the user must utilize a network programming option.
The 777-MV-P2 is an electronic overload relay that is fully programmable for customized protection.
The 777-MV-P2 is designed to protect 3-phase systems operating at medium voltage ranges. The
output relay is a Form C contact, which can control a contactor or other device within the output
relay contact rating. Typical applications can include pumps, grinders, and other 3-phase medium
voltage applications.
The 777-MV-P2 can be safely programmed prior to installation by supplying power with a 9V battery.
See Figure 5 in the PROGRAMMING section. DO NOT connect the battery to the unit when line
voltage is present. The 777-MV-P2 cannot
a 9V battery. For testing purposes, 3-phase power must be used with a minimum voltage of
100VAC. Follow all safety warnings when dealing with hazardous voltages.
CONNECTIONS
1. Disconnect power and verify line and control power are off.
2. Using the four corner tabs or the DIN rail mount, install the 777-MV-P2 directly above or below
the contactor. To mount on a DIN rail, hook the top clips first then apply downward pressure until
the lower clips snap onto the rail.
3. External CTs (current transformers) are required. SymCom recommends using CTs with terminal
connections for easier installation. All CT secondaries must make one or two passes through the
round holes on the MotorSaver®Plus according to Table 1. See Figure 2 for a typical wiring
diagram.
4. a) 3-phase voltage input: 100-240VAC, 3-phase voltage can be made available by using three
potential transformers in a wye-wye configuration. Reverse-phase protection, single-phase
and unbalance protection are available when using the wye-wye configuration shown in
Figure 4A. The motor will not start under these voltage fault conditions. Connect the 3-phase
© 2010 SymCom, Inc. All Rights Reserved 3
serious injury, or equipment damage.
be tested for proper operation or communications using
power from the secondary of the potential transformers to L1, L2 and L3 on the Model 777MV-P2 using #12-18 AWG wire.
b) 3-phase voltage input: Alternatively, 100-240VAC, 3-phase voltage can be made available
by connecting two potential transformers in an open delta configuration (Figure 4B).
c) Single-phase voltage input: If only single-phase, 120V control power is available, insert
control power into L1 and L2 inputs (Figure 4C). L3 must not be connected.
phase voltage input is used, single-phase faults are detected only after the motor starts and
reverse-phase protection is not available.
NOTE: Pay close attention to the wiring diagrams to eliminate any errors when communicating
power factor information over a network. The L2 phase conductor must pass through the B
current measurement hole for proper operation. VUB must be set to 999 for proper operation
with a single-phase voltage input.
5. Connect the 3-phase (or single-phase) power from the secondary side of the potential
transformer terminals using 12-18 AWG copper wire according to Figure 1 These should be
tightened to 7 in.-lbs., max.
6. Connect the control circuit wires to the appropriate terminals. The relay is designed for fail-safe
operation; the NO (normally open) contact should be in series with the coil on the contactor for
motor control (see Figure 1). For alarm circuits, the NC (normally closed) contact is in series with
the alarm circuitry.
Recommended
Full Load Amps
10-25 10-50 0, 5-49 2 25 (50:5)
20-50 20-100 0, 10-98 1 50 (50:5)
30-75 30-150 0, 15-147 1 75 (75:5)
40-100 40-200 0, 20-196 1 100 (100:5)
60-150 60-300 0, 30-294 1 150 (150:5)
80-200 80-400 0, 40-392 1 200 (200:5)
120-300 120-600 0, 60-588 1 300 (300:5)
160-400 160-800 0, 80-784 1 400 (400:5)
200-500 200-999 0, 100-980 1 500 (500:5)
240-600 240-999 0, 120-999 1 600 (600:5)
280-700 280-999 0, 140-999 1 700 (700:5)
320-800 320-999 0, 160-999 1 800 (800:5)
OC Range
(Amps)
UC Range
(Amps)
# of Passes
through each
Window
When single-
MULT (CT
Ratio)
1
Table 1: Wiring Configuration Based on Motor Full Load Amps
1
Do not allow the continuous current to exceed the CT rating. Consult the CT manufacturer
to ensure that the CT operating current and temperature are not exceeded.
4 © 2010 SymCom, Inc. All Rights Reserved
Figure 1: Typical Wiring Diagram
Figure 2: Typical Wiring Using External CTs
2
All CTs must face the same direction, and all CT secondaries must be wired identically, i.e. all X1
terminals enter the main (round) window and return to H1 terminal after exiting the loop conductor window
© 2010 SymCom, Inc. All Rights Reserved 5
2
Figure 3: Looping Example for 12.5-25A, MULT = 25
Figure 4: Potential Transformer Diagrams3
(rectangle). Every CT secondary must make one or two passes through the corresponding main conductor
window. SymCom recommends using CTs with terminals to simplify installation.
3
All potential transformers typically have 120VAC secondaries. The 777-MV-P2 may be installed with 3phase voltage input (Figures 4A & 4B) for full voltage monitoring and protection. If the single-phase voltage
input is used (Figure 4C), the 777-MV-P2 is a current monitor only.
6 © 2010 SymCom, Inc. All Rights Reserved
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