EV/DV300 Series Power Meter
Chapter 2: Installation
V:2.0 Revised October 2018
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The wire number of voltage input could be AWG16~22 or 0.6~1.5mm2. A fuse or circuit
breaker should be used in Aux. power supply circuit. Fuse could be selected Long Time Delay
1A/250Vac one. No. 3 terminal must be connected to the safety earth system of switch gear.
An isolated transformer or EMI filter should be used in the auxiliary power supply loop if there
is power quality problem in the power supply. As in Fig 2.9.
Voltage Input
Two Voltage Input options of EV/DV300 meter are
100Vac and 400Vac.
100Vac option is suitable for low voltage system
that less than 120Vac in high or medium voltage
system that the secondary of PT is 100Vac.
400Vac option is suitable for low voltage system
that is less than 480Vac. The voltage input could be
directly connected to the terminal of EV/DV300
without the use of PT.
NOTE
The secondary of PT cannot be
shorted, otherwise it may
cause the severe damage of
the instrument.