Hardware Functional Testing; Phase Current Accuracy Test; Voltage Input Accuracy Test; Ground And Differential Accuracy Test - GE 469 Instruction Manual

Hardware Functional Testing

Phase Current
Accuracy Test
INJECTED
CURRENT
1 A UNIT
0.1 A
0.2 A
0.5 A
1.0 A
1.5 A
2.0 A
Voltage Input Accuracy
Test
Ground and Differential
Accuracy Test
GE Multilin
Hardware Functional Testing
The 469 specification for phase current accuracy is ±0.5% of 2 × CT when the
injected current is less than 2 × CT. Perform the steps below to verify accuracy.
1. Alter the following setpoint:
S2 SYSTEM SETUP CURRENT SENSING
2. Measured values should be ±10 A. Inject the values shown in the table below
and verify accuracy of the measured values. View the measured values in:
A2 METERING DATA CURRENT METERING
INJECTED EXPECTED
CURRENT CURRENT
5 A UNIT READING
0.5 A 100 A
1.0 A 200 A
2.5 A 500 A
5.0 A 1000 A
7.5 A 1500 A
10 A 2000 A
The 469 specification for voltage input accuracy is ±0.5% of full scale (273 V).
Perform the steps below to verify accuracy.
1. Alter the following setpoints:
S2 SYSTEM SETUP VOLTAGE SENSING
S2 SYSTEM SETUP
"10.00:1"
2. Measured values should be ±13.65 V. Apply the voltage values shown in the
table and verify accuracy of the measured values. View the measured values in:
A2 METERING DATA VOLTAGE METERING
APPLIED EXPECTED
LINE-NEUTRAL VOLTAGE
VOLTAGE READING
30 V 300 V
50 V 500 V
100 V 1000 V
150 V 1500 V
200 V 2000 V
270 V 2700 V
The 469 specification for differential current and 1 A/5 A ground current input
accuracy is ±0.5% of 1 × CT for the 5 A input and 0.5% of 5 × CT for the 1 A input.
Perform the steps below to verify accuracy.
a) 5 A Input
1. Alter the following setpoints:
S2 SYSTEM SETUP CURRENT SENSING
S2 SYSTEM SETUP CURRENT SENSING
S2 SYSTEM SETUP CURRENT SENSING
S2 SYSTEM SETUP CURRENT SENSING
2. Measured values should be ±5 A. Inject the values shown in the table below into
one phase only and verify accuracy of the measured values. View the measured
values in
A2 METERING DATA
http://www.GEindustrial.com/multilin
PHASE CT PRIMARY:
MEASURED MEASURED
CURRENT CURRENT
PHASE A PHASE B
VT CONNECTION TYPE:
VOLTAGE SENSING VOLTAGE TRANSFORMER RATIO:
MEASURED MEASURED
VOLTAGE A-N VOLTAGE B-N
GROUND CT:
GROUND CT PRIMARY:
PHASE DIFFERENTIAL CT:
PHASE DIFFERENTIAL CT PRIMARY:
CURRENT METERING
469
Motor Management Relay
"1000 A"
MEASURED
CURRENT
PHASE C
"Wye"
MEASURED
VOLTAGE C-N
"5A Secondary"
"1000 A"
"5A Secondary"
"1000 A"
7–3