CLASS 3400 METER
62-0391-03
16
6.2 Main Power Board Connections (continued)
f. Verify the voltage readings on Screen 5 using an AC voltmeter. Typical read-
ings shown below are measured phase to neutral for 4 wire and phase to
phase for 3 wire. Readings should be +/- 10% of nominal.
NOTE: Meters are powered by phases A and B. The displayed voltages will be
the measured AC voltage between phases.
6.3 Phasing of Line Voltage
The 3-phase AC power input or single-phase option must be in proper phase
sequence. If the sequence is incorrect or a phase is missing, there will be a message
on the meter’s display: “PH Sequence Error” or “PH Missing:. (Refer to the section on
Line Voltage Diagnostics if this message is present.) When the line voltage is
connected correctly, the meter’s display will be blank (no message.)
Wait for the meter display to scroll to the voltage display. Verify that the meter reads
correct voltages on all three phases. Repeat Step F.
Once the meter displays the correct line voltages and there are no error messages,
you are ready to connect the current sensors to the meter. Before continuing with the
installation, verify that the six screens display as follows:
Screen 1 (kWh):
Should read 0.0 kWh; if not, should be reset.
Screen 2 (kW Peak Demand): kW peak should read 0.0 kW. There will not be a date/
time stamp yet. If there is a kW peak recorded, it
should be reset later
Screen 3 (kW Load):
Should read 0.0 kW load.
Screen 4 (Amps per Phase): There should be 0.0 on all three phases.
Or in the SP option - 0.0 in A and B phases.
Screen 5 (Average AC Volts): See Step F.
Screen 6 (Average AC Volts): See Step F.
Screen 7 (Power Factor):
There should be 0.0 PF on all three phases.
Or in the SP option - 0.0 in A and B phases.
Meter Type
Nominal Voltage
Limits (+/- 10%)
120/208V, 3ø, 4 Wire
120/240V, 1ø, 3 Wire
120V, 1ø, 2 Wire
120 VAC (L-N)
108 to 132 VAC
277/480V, 3ø, 4 Wire
277V, 1ø, 2 Wire
277 VAC (L-N)
249 to 305 VAC
240V, 3ø, 3 Wire
240 VAC (L-L)
216 to 264 VAC
400V, 3ø, 4 Wire
230 VAC (L-N)
207 to 253 VAC
480V (380, 415), 3ø, 3 Wire
480 VAC (L-L)
432 to 528 VAC
600V, 3ø, 4 Wire
347 VAC (L-N)
312 to 380 VAC