BE SURE POWER IS DISCONNECTED PRIOR TO INSTALLATION!
FOLLOW NATIONAL, STATE AND LOCAL CODES!
READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION.
The Model 777-AccuPower is a fully-programmable, solid-state power monitor/motor protection relay
for use on 3-phase systems with operating voltages of 190–480VAC. The Model 777-AccuPower
allows motor hp rating, full load amps, efficiency, and power factor to be entered and will accurately
calculate and display motor output power. The 777-AccuPower can be used with SymCom’s
4–20mA output module to give an analog signal proportional to this output power.
The Model 777-AccuPower can be programmed prior to installation by applying 120VAC to
terminals L1 and L2. The unit CANNOT be tested for proper operation using this voltage. For testing
purposes, 3-phase power must be used with a minimum voltage of 190VAC.
CONNECTIONS
1. Disconnect power and verify power is off.
2. Using the four corner tabs or the DIN rail mount, mount the Model 777-AccuPower directly above
or below the contactor. To use the DIN rail mount, hook the top clip first then apply downward
pressure until the lower clip snaps onto the rail.
3. A) For amperage ranging from 25–90 amps (2–9 amps for -LR model), insert the motor
conductors through the hole marked A, B, and C. Make certain the conductor through each hole
corresponds to the right motor conductor, i.e. the A phase conductor should go through the A
round hole. See Figure 1 for a typical wiring diagram.
B) For amperage less than 25 amps (1–2 amps for -LR model), loop the motor conductors
according to Table 1. Figure 2 shows an example of the looping required for current ranging from
8.1 to 12 amps (MULT=3).
C) For amperage greater than 90 amps, external CTs (current transformers) are required.
SymCom recommends using CTs with terminals to simplify installation. All CT secondaries must
make five passes through the round holes on the PumpSaver. See Figure 3 for a typical wiring
diagram using external CTs.
NOTE: Pay close attention to this diagram to eliminate any power factor errors that will create
errors in the horsepower measurements.
4. Connect the 3-phase power from the line side of the contactor to terminals L1, L2, and L3 using
12–18 AWG copper wire (See Figure 1). Figure 1 is drawn for a power system wired in ABC
phase sequence. For power systems with ACB phase sequence, switch L1 and L3 connections to
the Model 777-AccuPower.
5. Connect the control circuit wires to the appropriate terminals. The device is designed to be fail
safe so the NO (normally open) contact should be in series with the coil on the contactor for motor
control (see Figure 1), and the NC (normally closed) contact in series with the alarm circuitry.
INSTALLATION INSTRUCTIONS FOR SYMCOM’S
MODEL 777-ACCUPOWER w/4-20mA
POWER MONITOR
MOTOR PROTECTION RELAY
OVERLOAD RELAY
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
