PCM600 Protection and Control IED Manager
PGU Power generating unit
PLC Programmable logic controller
PPS Pulse per second
PRP Parallel redundancy protocol
Peak-to-peak 1. The amplitude of a waveform between its maximum
positive value and its maximum negative value
2. A measurement principle where the measurement
quantity is made by calculating the average from the
positive and negative peak values without including the
DC component. The peak-to-peak mode allows
considerable CT saturation without impairing the
performance of the operation.
Peak-to-peak with
peak backup
A measurement principle similar to the peak-to-peak
mode but with the function picking up on two conditions:
the peak-to-peak value is above the set pickup current or
the peak value is above two times the set pickup value
RAM
Random access memory
RCA Also known as MTA or base angle. Characteristic angle.
RED615 Line differential protection and control relay
REF615 Feeder protection and control relay
REM615 Motor protection and control relay
RET615 Transformer protection and control relay
RJ-45 Galvanic connector type
RMS Root-mean-square (value)
ROM Read-only memory
RSTP Rapid spanning tree protocol
RTC Real-time clock
RTD Resistance temperature detector
RTS Ready to send
Rx Receive/Received
SAN Single attached node
SBO Select-before-operate
SCADA Supervision, control and data acquisition
Section 17 1MAC059074-MB A
Glossary
1184 615 series ANSI
Technical Manual
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