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© 2011 Schneider Electric. All Rights Reserved.
63230-500-225A2 PowerLogic
TM
Series 800 Power Meter
3/2011 Appendix D—Advanced Power Quality Evaluations
95
EN50160:2000 Specification
EN50160:2000 “Voltage characteristics of electricity supplied by public distribution systems”
is a European standard that defines the quality of the voltage a customer can expect from
the electric utility. Although this is a European standard, it can be applied globally.
The PM850 and the PM870 evaluates the following electrical characteristics in accordance
with EN50160:
As illustrated in Table D–5, the EN50160 evaluations performed by the PM850 and the
PM870 can be divided into two categories. The first category performs evaluations during
normal operation utilizing meter data. The second category performs evaluations during
abnormal operation utilizing either standard alarms (PM850) or disturbance alarms (PM870).
The EN50160:2000 Specification sets limits for most of the evaluations. These limits are
built into the PM850 and the PM870 firmware. You can configure registers for other
evaluations and change them from the default values.
How Evaluation Results Are Reported
The PM850 and the PM870 reports evaluation data in register entries and alarm log
entries. Table D–6 describes the register entries for the evaluation data.
Log entries for the evaluation data include:
• On-board alarm log entry for diagnostic alarms: When the status of an area of
evaluation is outside the range of acceptable values, an entry is made in the on-board
alarm log. This entry provides notification of the exception for a specific area of
evaluation. This notification is reported only in PowerLogic software and does not
appear on the local display.
Table D–5: EN50160 Evaluation for the PM850 and PM870
Feature PM850 PM870
Evaluation During Normal Operation (Meter-based Data)
Frequency 3 3
Supply voltage variations 3 3
Supply voltage unbalance 3 3
Harmonic voltage 3 3
Total Harmonic Distortion 3 3
Evaluations During Abnormal Operations (Alarm-based Data)
➀
Magnitude of rapid voltage changes 3 3
Supply voltage dips 3
➁
3
➁
Short interruptions of the supply voltage 3
➁
3
➁
Long interruptions of the supply voltage 3
➁
3
➁
Temporary power frequency over-voltages 3
➁
3
➁
➀ The PM850 performs EN50160 evaluations based on standard alarms, while the
PM870 performs EN50160 evaluations on disturbance alarms.
➁ These features must be configured using register writes. See Table D–11 on page 99
for a list of configuration and status registers.
Table D–6: Register Entries
Register
Number
Description
3910
Summary bitmap of active evaluations that reports which areas
of evaluation are active in the PM850 and the PM870.
3911
Summary bitmap of evaluation status that reports the pass/fail
status of each area of evaluation.
Portal registers
Detail bitmap of evaluation status that reports the pass/fail status
of the evaluation of each individual data item. Detailed data
summary information is also available for each of the evaluations
for the present interval and for the previous interval. You can
access this data over a communications link using Modbus block
reads of “portal” registers. Refer to “Evaluation During Normal
Operation” on page 96 for additional information.