Table of Contents
Advertisement
1MRS750881-MUM
5.
5.1.
5.1.1.
Remote Monitoring and Control Unit
Technical Reference Manual
Functional description
REC 523 functions
The functions of REC 523 are categorized as:
• Measurement functions
• Control functions
• Protection and fault indication functions
• Condition monitoring functions
• Power quality functions
• Communication functions
• Standard functions
• General functions
Measurement functions
Current measurement can be based on Rogowski coils or conventional current
transformers. Correspondingly, voltage dividers or voltage transformers are used for
voltage-based measurement.
Measurement functions are available, for example, for three-phase currents, neutral
current, three-phase voltages, residual voltage, frequency, and active and reactive
power. One REC 523 device can be used to measure 2 feeders or branches by means
of 9 analogue channels.
Furthermore, REC 523 incorporates environmental temperature and battery voltage
measurements. The values measured can be forwarded to the control centre.
The measurement function blocks are documented on the CD-ROM Technical
Descriptions of Functions (refer to Section 1.8. Related documents)
Table 5.1.1-1
Measurement functions available for REC 523
Function
Description
a
General measurement 1...8/analogue input on RTD/analogue module
MEAI1...MEAI8
MECU1A
Neutral current measurement, stage A
MECU1B
Neutral current measurement, stage B
MECU3A
Three-phase current measurement, stage A
Three-phase current measurement, stage B
a
MECU3B
MEVO1A
Residual voltage measurement, stage A
Residual voltage measurement, stage B
a
MEVO1B
MEVO3A
Three-phase voltage measurement, stage A
a
Three-phase voltage measurement, stage B
MEVO3B
MEPE7
Three-phase power and energy measurement
MEFR1
System frequency measurement
MEDREC16
Transient disturbance recorder
a. This function is supported in the REC 523 software revision C, or later.
REC 523
19
Advertisement
Table of Contents
