Connections; Meter Accuracy; Meter Case - Elster A100C Operating & Maintenance Instructions

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6.3

Connections

Meters are designed for direct connection to 50 Hz or 60 Hz supplies. They may be marked
for use at reference voltages in the range 220 - 250V or 110 - 127V, and are rated to a
maximum current 100A I
Terminal Arrangements
Main terminals
Auxiliary terminals
Meter nameplates (see Figure 3) are marked with the rated current, reference voltage,
frequency and relevant meter constant (for example pulses/kWh).
Connection diagrams are shown inside the terminal cover.
6.4

Meter Accuracy

The A100C measures active energy in accordance with the requirements of IEC 62053-
21:2003 for indoor kWh meters of protective Class II and accuracy Class 1 or Class 2.
Typical accuracy curves are shown in Figure 4.
The design of the meter ensures life long stability. No adjustments are required in the field.
6.5

Meter Case

The terminal arrangements are shown in Figure 5.
The main meter cover is fixed permanently to the base at manufacture.
The case is double insulated to protective Class II. The case provides an ingress protection
rating of IP53 in accordance with IEC 60529:1989.
The base, with its integral terminal block is moulded in glass-filled polycarbonate.
The terminal cover (standard or extended) is moulded in light beige coloured polycarbonate.
The main cover is moulded in tinted, clear polycarbonate.
Figure 6 illustrates the outline fixing dimensions.
max.
8.2mm diameter bores, M6 cross/slot head combination screws
3.2mm diameter bore, M3 cross/slot head combination screws
Operating & Maintenance Instructions
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