GE Agile P50 Series Technical Manual page 194

8 Monitoring & Control
disturbance records locally via the front panel LCD. This waveform can be downloaded via the
communication port for further analysis.
The fault recording is set by Trigger Position cell. The Trigger Position cell sets the trigger point as
a percentage of the duration.
The details of the disturbance record are as follows:
Capacity:
Pre fault Trigger position: Programmable
Sampling rate:
Triggers:
Data:
2.2 Record Control
The data stored in Event/Fault/Maintenance/Disturbance Records can be cleared by enabling the
settings Clear Events/Clear Faults/Clear Maint/Clear Dist Recs in Record Control menu. The
Thermal State can be reset by enabling the Thermal Reset setting.
2.3 Display of Measuring Parameters
The device directly measures and calculates a number of system quantities, which are updated at
regular intervals. These values can be viewed in the MEASUREMENTS menu on the LCD screen
using the navigation keys on the front panel or using the P50 Agile configurator tool.
In normal conditions the relay displays Primary and Secondary current value of phases A, B, C and
earth current N as per phase/earth CT ratio within ±2% accuracy and Thermal state in %.
The device measures and displays the following quantities:
8-6
5 records of 1 sec each
16 samples / cycles
Trip signals, external trigger via opto input assignment.
5 analogue channels and up to 33 digital channels (physical and logical
status).
Parameter
IA
IB
IC
IN1
IN2
ia
ib
ic
in1
in2
i2
i1
I2/I1
TC
BOC
BOT
Unit Description
amp Primary current in phase A
amp Primary current in phase B
amp Primary current in phase C
amp Primary earth current (measured)
amp Primary earth current (derived)
amp Secondary current in phase A
amp Secondary current in phase B
amp Secondary current in phase C
amp Secondary earth current (measured)
amp Secondary earth current (derived)
amp Secondary -ve phase sequence current
amp Secondary +ve phase sequence current
% Ratio of I2/I1
Breaker Trip counter
count
(Count of number of trips issued by relay)
Breaker operation counter
count (Count of total breaker operations-
local & relay tripping )
Breaker operating time
millisecond
(Breaker contact opening time for the latest
trip)
P50 Agile P153
P153/EN M/B