Rtd Accuracy Test - GE 469 Instruction Manual

CHAPTER 7: TESTING
7.2.4 GE Digital Energy 50:0.025 Ground Accuracy Test
7.2.5

RTD Accuracy Test

469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
A2 METERING DATA
INJECTED EXPECTED
CURRENT CURRENT
1 A UNIT READING
0.1 A 100 A
0.2 A 200 A
0.5 A 500 A
1.0 A 1000 A
The 469 specification for GE Grid Solutions 50:0.025 ground current input accuracy is
±0.5% of CT rated primary (25 A). Perform the steps below to verify accuracy.
 Alter the following settings:

S2 SYSTEM SETUP CURRENT SENSING
Measured values should be ±0.125 A.
 Inject the values shown in the table below either as primary values
into a GE Grid Solutions 50:0.025 Core Balance CT or as secondary
values that simulate the core balance CT.
 Verify accuracy of the measured values.
 View the measured values in:
A2 METERING DATA
PRIMARY
INJECTED
CURRENT
0.25 A 0.125 mA
1 A 0.5 mA
10 A 5 mA
25 A 12.5 mA
The 469 specification for RTD input accuracy is ±2°. Perform the steps below.
 Alter the following settings:
S8 RTD TEMPERATURE
desired type)
S8 RTD TEMPERATURE
12)
Measured values should be ±2°C or ±4°F.
 Alter the resistances applied to the RTD inputs as per the table below
to simulate RTDs.
 Verify accuracy of the measured values.
 View measured values in:

CURRENT METERING
MEASURED
GROUND
CURRENT
PHASE A

GROUND CT:

CURRENT METERING
SECONDARY EXPECTED
INJECTED CURRENT
CURRENT READING
0.25 A
1.00 A
10.00 A
25.00 A
 
RTD TYPES STATOR RTD TYPE:
 
RTD #1 RTD #1 APPLICATION:
:
MEASURED DIFFERENTIAL
CURRENT
PHASE B PHASE C
"50:0.025"
MEASURED
GROUND
CURRENT
"100 Ohm Platinum" (select
"Stator" (repeat for RTDs 2 to
7–5