Monitoring; Metering; Inputs - GE B90 Instruction Manual

CHAPTER 2: PRODUCT DESCRIPTION
Dropout delay:
Timing accuracy:

2.5.3 Monitoring

OSCILLOGRAPHY
Maximum records:
Sampling rate:
Triggers:
Data:
Data storage:
EVENT RECORDER
Capacity:
Time-tag:
Triggers:
Data storage:
USER-PROGRAMMABLE FAULT REPORT
Number of elements:
Pre-fault trigger:
Fault trigger:
Recorder quantities:

2.5.4 Metering

CURRENT METERING
Accuracy at
0.1 to 2.0 × CT rating:
> 2.0 × CT rating:
VOLTAGE
Accuracy:
FREQUENCY
Accuracy at
V = 0.8 to 1.2 pu:
I = 0.1 to 0.25 pu:
I > 0.25 pu:

2.5.5 Inputs

AC CURRENT
CT rated primary:
CT rated secondary:
Relay burden:
Conversion range:
Current withstand:
Short circuit rating:
B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
0.000 to 999999.999 s in steps of 0.001
±3% or ±4 ms, whichever is greater
64
64 samples per power cycle
any element pickup, dropout, or operate; contact input change of state; contact output change
of state; FlexLogic equation
AC input channels; element state; contact input state; contact output state
in non-volatile memory
1024 events
to 1 microsecond
any element pickup, dropout, or operate; contact input change of state; contact output change
of state; self-test events
in non-volatile memory
2
any FlexLogic operand
any FlexLogic operand
TM
32 (any FlexAnalog value)
±0.25% of reading or ±0.1% of rated (whichever is greater)
±1.0% of reading
±0.5% of reading from 10 to 208 V
±0.001 Hz (when voltage signal is used for frequency measurement)
±0.005 Hz
±0.02 Hz (when current signal is used for frequency measurement)
1 to 50000 A
1 A or 5 A by connection
< 0.2 VA at rated secondary
0.02 to 46 × CT rating RMS symmetrical
20 ms at 250 times rated
1 sec at 100 times rated
continuous 4xInom
URs equipped with 24 CT inputs have a maximum operating temperature of 50°C
150000 RMS symmetrical amperes, 250 V maximum (primary current to external CT)
SPECIFICATIONS
2
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