Rockwell-automation 1402-LSM Line Synchronization Module Installation Instrukcja Użytkownika Pobierz pdf (Strona 28)

Chapter 3

General Operation

3–6

Power Monitoring

In addition to the synchronization function, the LSM provides an extensive

array of monitoring information. This data is accessible through one of

several different block transfers. (See Appendix B, “Block Transfer Tables

and Discrete I/O Definition”, for additional information.) All voltage and

current measurements presented by the LSM are true RMS. The power

measurements are calculated from the instantaneous voltage and current

measurements. The remainder of the monitoring information is calculated

from these values.

The LSM will clip the input voltages at approximately 1.25 times the

maximum voltage input level. If this clipping takes place, the value 999 will

be returned in every data field affected by the clipped channel.

The monitored values are scaled and reported based on the configuration

entries that were provided by the user. This function is terminated if new

configuration data is received. The new configuration data is evaluated and

normal operation is resumed upon acceptance of the data. During

synchronization those parameters not required for synchronization are

monitored at a reduced priority. This allows critical synchronization data to

be updated at a faster rate.

VAR

(

)

kVARH–F (Forward)

(Power Factor Leading)

(+)

Pf = 100%

–kW (Export)

kWH (Reverse)

180° 0°

270°

90°

(Power Factor Lagging)

(–)

Pf = 0

–kV

AR (Export)

ARH–R (Reverse)

(Power Factor Lagging)

(–)

Pf = 100%

+kW (Import)

kWH–F (Forward)

(Power Factor Leading)

(+)

Pf = 0

NOTE: Lagging Factor indicated by a minus sign.

III

III IV

Oper

ational

act

istics

Continued

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 86 87

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