DPR-400 User Manual Rev_01 Firmware V-1.0
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Although the unit is protected against electromagnetic disturbance, excessive disturbance can affect the
operation, measurement precision and data communication quality.
▪
ALWAYS remove plug connectors when inserting wires with a screwdriver.
▪
Fuses must be connected to the power supply and phase voltage inputs, in
close proximity to the unit.
▪
Fuses must be of fast type with a maximum rating of 6A.
▪
Use cables of appropriate temperature range.
▪
Use adequate cable section, at least 0.75mm
2
(AWG18).
▪
Follow national rules for electrical installation.
▪
Current transformers must have 1A or 5A output.
▪
For current transformer inputs, use at least 1.5mm
2
section (AWG15) cable.
▪
The current transformer cable length should not exceed 1.5 meters. If a
longer cable is used, increase the cable section proportionally.
2.3. ELECTRICAL INSTALLATION
Do not install the unit close to high electromagnetic
noise emitting devices like contactors, high current
busbars, switch mode power supplies, etc.
For the correct storage of event records, adjust the
real time clock through the programming menu.
