Schneider Electric PM850 Manual De Usuario

© 2011 Schneider Electric. All Rights Reserved.

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. 

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.

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

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.

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.