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2. Installation
2.1. Mounting
The meter is housed in a compact ABS plastic enclosure of
dimension 96(H) x 96(W) x 45(D)mm. The meter is suitable for panel
mounting and has reliable mounting clamps to hold the meter to the
panel.
The panel cut out for fixing the meter is a 92 x 92 mm. The
depth behind the panel is 45 mm. Always provide extra space for the
connectors and wiring. The panel cut out should be punched with
proper tool and should be free from burrs. Insert the meter through
panel cutout from front and fix the mounting clamps provided with the
meter on each side. Tighten the fixing clamps with limit amount of force
so as to hold the meter in position.
2.2. Wiring
2.2.1 Selection of PT & CT
The measurement of voltage and current is done using the PT
voltage and CT current inputs. So the accuracy of measurement is
determined by the accuracy and phase shift produced by the PT’s and
CT’s so it is recommended to use PT’s and CT’s of instrument class
0.5 or better.
Also the PT’s and CT’s should have adequate VA rating to
support the burden on the secondary side of them. The primary rating
of the CT has to be selected such that the load variation lies between
the dynamic range of the CT. (30% to 80% of the primary current).
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