Schneider Electric PM850, PM870 EN501602000 Specification, How Evaluation Results Are Reported

63230-500-225A2	PowerLogicTM Series 800 Power Meter
3/2011	Appendix D—Advanced Power Quality Evaluations

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:

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	3➁	3➁
Short interruptions of the supply voltage	3➁	3➁
Long interruptions of the supply voltage	3➁	3➁
Temporary power frequency over-voltages	3➁	3➁

➀The PM850 performs EN50160 evaluations based on standard alarms, while the PM870 performs EN50160 evaluations on disturbance alarms.

➁These features must be configured using register writes. See Table D–11 on page 99 for a list of configuration and status registers.

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–6describes the register entries for the evaluation data.

Table D–6: Register Entries

Register	Description
Number
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.
	Detail bitmap of evaluation status that reports the pass/fail status
	of the evaluation of each individual data item. Detailed data
Portal registers	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.

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.

© 2011 Schneider Electric. All Rights Reserved. 95