Delta DPM-C501L, Руководство по эксплуатации, Страница: 22 / 79

D P M - C 5 0 1 L / C 5 0 2 O p e r a t i o n M a n u a l
3 - 4
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3.2 Basic Checks
Items Contents
General Check

Regularly check for losing of the fixing mount at the location where the power meter and
device are connected.

Guard against entrance of foreign objects, such as oil, water, or metal powder at the heat
dissipating holes. Guard against entrance of drill cut powders into the power meter.

Should the power meter be installed at a place present with harmful gas or dust, guard
against entrance of those matters into the meter.
Pre-operation
Check
(not supplied
with power)

Insulate the connecting spot of the wiring terminals.

Communications wiring should be done properly, or abnormal operations might result.

Check for presence of conducive and flammable objects, such as screws or metal pieces,
in the power meter.

Should electronic devices used near the power meter experience electromagnetic
interference, tune with instruments to reduce electromagnetic interference.

Check for correct voltage level for the power supplied to the power meter.
Pre-running
Check
(supplied with
power)

Check whether power indicator light is lit.

Check whether communication between every device is normal.

If there is any abnormal response from the power meter, contact your distributor or our
customer service center.
3.3 Wiring
3.3.1 Wiring Diagrams

To avoid electric shock, do not alter wiring when the power is on.

As there is no power switch on the power meter, be sure to install a breaker switch on the power cord for
the meter.

When measured voltage is higher than the rated specification for the device, use of an external potential
transformer (PT) is necessary.

When measured current is higher than the rated specification for the device, use of an external current
transformer (CT) is necessary.
Recommended wiring materials are shown below:
Connecting Terminals Wire Diameters Screw Turning Torque Temperature rating
Operating power, RS-485, DI/DO AWG 12 to 24 8.0 kgf-cm (0.8 N·m) more than 70°C
Voltage and current measurement AWG 12 to 24 8.0 kgf-cm (0.8 N·m) more than 70°C