Measurements - ABB REM 610 Technical Reference Manual

1MRS755537
5.1.2.
Motor Protection Relay
Technical Reference Manual - ANSI Version
Time synchronization is always triggered on the rising edge of the digital input
signal. The time is adjusted in steps of five milliseconds per synchronization pulse.
The typical accuracy achievable with time synchronization via a digital input is ±2.5
milliseconds for second-pulse and ±5 milliseconds for minute-pulse
synchronization.
The pulse length of the digital input signal does not affect time
synchronization.
If time synchronization messages are received from a communication
protocol as well, they have to be synchronized within ±0.5 minutes at
minute-pulse or ±0.5 seconds at second-pulse synchronization.
Otherwise, the relay's real-time clock makes sudden minute or second
jumps in either direction. If it is possible that synchronization messages
from the communication protocol are delayed more than 0.5 seconds,
minute-pulse synchronization must be used.

Measurements

The table below presents the measured values which can be accessed through the
HMI.
Table 5.1.2.-1 Measured values
Target
l
a
l
b
l
c
I
n
I
2
TH LEVEL
Start time
66 value
Rest. Dis
Running time
Max IP
Max IP
Max I
n
Min IP
Min I
n
1 min.
n min.
Max I
Description
Current measured on phase l
Current measured on phase l
Current measured on phase l
Measured ground-fault current
Calculated NPS current
Thermal level
Start-up time of the latest motor start up
Cumulative start-up time counter
Time to next possible motor start up
Motor running time
Maximum phase current during motor start up
Maximum phase current after motor start up
Maximum ground-fault current after motor start up
Minimum phase current after motor start up
Minimum ground-fault current after motor start up
The average current of the three phase-to-phase
currents during one minute
The average current of the three phase-to-phase
currents during the specified time range
The maximum of one-minute average current of the n
min
REM 610 REM 610
a
b
c
25