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2
Chapter 1 Introduction
Features
Local Display:
The front panel features bright LED displays (three
windows, up to 134 pages, 6-digit energy counters) with adjustable
update time, a bar graph showing percent load with respect to user-
definable nominal load current, two communications receive/transmit
LEDs, and an energy pulsing LED.
Display auto scroll is available on the main screen with a programmable
scroll interval of 2 to 15 seconds. Automatic return to the main screen is
available after 30 seconds of uninterrupted use.
AC Inputs:
3 voltage and 3 current galvanically isolated inputs for direct
connection to power line or via potential and current transformers.
Harmonic Measurements:
•
Individual voltage and current harmonics with harmonic
angles up to order 40
•
Harmonic power direction (through PAS software)
•
Synthesized voltage and current waveforms (through
PAS software)
•
Total harmonic powers and energies (active
import/export and apparent)
Setup
is menu driven, with optional password protection.
Two communication ports
are available for RS-232/RS-485 and RS-
422/RS-485 standards, with ASCII, Modbus RTU and DNP3.0 protocols.
In ASCII and Modbus protocols, 120
assignable registers
allow the user
to re-map any register address accessible in the instrument to the user
assignable register area. Changing setups and resetting accumulated
data through communications can be secured by the password.
Two relays
are provided for energy pulsing (KYZ) or alarm and remote
control.
Two optically isolated status inputs
are provided for status monitoring
with timestamp, for counting pulses and for external demand and time
synchronization.
Two optically isolated analog outputs
with an internal power supply are
provided for remote monitoring or control. Current loop options are
0-20mA, 4-20mA, 0-1mA,
±
1mA.
Real Time Clock
is provided for date and time stamp log and demand
interval synchronization. Standard or Daylight Savings Time (DST) with
automatic time adjustment is available. DST switch dates can be
configured for the use in different time zones.
The
TOU (Time of Use)
system:
Содержание PM172EH Series
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