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CLASS 500 ADVANCED KWH/DEMAND METER
3 62-0304—05
INSTALLATION
VERIFY the input voltage rating and configuration on the unit panel label to ensure it is suitable for the intended electrical service.
Meters labeled for 115/208 volt service MUST NOT be installed on service feeds of 277/480 volt and vice versa.
VERIFY that the Class 500 Meter current sensors are sized suitably for the load to be monitored. Compare the color of the arrows
on the current sensors to the chart below to confirm the correct current sensor is being used.
Table 1. Sensor arrow color and rating
CAUTION
Internal circuit card components are extremely sensitive to electrostatic discharge. Prior to handling or touching
the internal circuitry, discharge any static build-up on your person. To discharge yourself, touch a grounded
metal object such as conduit or an earth grounded metal enclosure.
WARNING
Use of the Class 500 Meter in a manner inconsistent with this manual or not specified by the manufacturer in
writing can cause permanent damage to the unit and/or serious injury to the operator. The protection and safety
features provided by this equipment may become impaired or otherwise compromised.
WARNING
High voltages are present on main power terminal block, TB1. Risk of serious injury and/or electrical shock
exists. Prior to performing any wiring operations, review all the contents of the user’s manual and de-energize
the MAINS power switch. Only qualified personnel should perform installation wiring. Installation wiring must
comply with all local and national electrical codes.
WARNING
Failure to ground the enclosure creates a possible shock hazard. Do not operate the Class 500 Meter without a
protective earth wire attached securely to the PE terminal screw. After installing the protective earth wiring,
secure the screw tightly (10 N-m torque). NEVER open the front panel of the unit while the unit has MAINS power
applied. Failure to comply can increase the risk of serious injury and for electrical shock.
Internal Electronic Assemblies
The unit is composed of two major subassembly boards: the main power and display boards (See Fig. 1).
NOTE: Units supplied in a NEMA 12 metal enclosure are suitable for indoor applications only. For outdoor installation, use the
NEMA 4 enclosure.
Fig. 1. Subassembly boards in the Class 500 Meter.
Sensor Arrow Color Code Sensor
Brown 100 Amp
Red 200 Amp
Yellow 400 Amp
Black 800 Amp
Blue 1600 Amp
White/Black 3200 Amp
M28750
POWER SUPPLY BOARD
DISPLAY BOARD