2. Polycarbonate
PCM600 Protection and Control IED Manager
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 starting on two conditions:
the peak-to-peak value is above the set start current or
the peak value is above two times the set start value
PLC Programmable logic controller
PPS Pulse per second
PRP Parallel redundancy protocol
RAM Random access memory
RCA Also known as MTA or base angle. Characteristic angle.
RED615 Line differential protection and control IED
REF615 Feeder protection and control IED
REM615 Motor protection and control IED
RET615 Transformer protection and control IED
RI Ring Indicator
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
SBO Select-before-operate
SCL XML-based substation description configuration
language defined by IEC 61850
Single-line
diagram
Simplified notation for representing a three-phase
power system. Instead of representing each of three
1YHT530004D05 D Section 17
Glossary
615 series 885
Technical Manual
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