GE Agile P153 - 2.2 Record Control; 2.3 Display of Measuring Parameters

8 Monitoring & Control
P50 Agile P153
8-6
P153/EN M/B
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: 5 records of 1 sec each
Pre fault Trigger position: Programmable
Sampling rate: 16 samples / cycles
Triggers: Trip signals, external trigger via opto input assignment.
Data: 5 analogue channels and up to 33 digital channels (physical and logical
status).
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:
Parameter Unit Description
IA amp Primary current in phase A
IB amp Primary current in phase B
IC amp Primary current in phase C
IN1
amp
Primary earth current (measured)
IN2
amp
Primary earth current (derived)
ia amp Secondary current in phase A
ib amp Secondary current in phase B
ic amp Secondary current in phase C
in1 amp Secondary earth current (measured)
in2
amp
Secondary earth current (derived)
i2
amp
Secondary -ve phase sequence current
i1 amp Secondary +ve phase sequence current
I2/I1 % Ratio of I2/I1
TC count
Breaker Trip counter
(Count of number of trips issued by relay)
BOC count
Breaker operation counter
(Count of total breaker operations-
local & relay tripping )
BOT millisecond
Breaker operating time
(Breaker contact opening time for the latest
trip)