Multilin SR469, Instruction Manual

Page: 222 / 270

HARDWARE FUNCTIONAL TESTING 7. TESTING
7-4
7.2.4 MULTILIN 50:0.025 GROUND ACCURACY TEST
The SR469 specification for Multilin 50:0.025 ground current input accuracy is
±
0.5% of CT rated primary (25A). Perform the steps below to
verify accuracy.
1. Alter the following setpoint:
SETPOINT S2:SYSTEM SETUP\CURRENT SENSING\GROUND CT: MULTILIN 50:0.025
2.
Measured values should be
±
0.125A. Inject the values shown in the table below either as primary values into a Multilin 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:
ACTUAL VALUES A2:\METERING DATA\CURRENT METERING
Table 7-5 MULTILIN 50:0.025 GROUND CURRENT TEST
PRIMARY INJECTED
CURRENT
50:0.025 CT
(A)
SECONDARY
INJECTED CURRENT
(mA)
EXPECTED
CURRENT
READING
(A)
MEASURED
GROUND
CURRENT
(A)
0.25 0.125 0.25
1 0.5 1.00
10 5 10.00
25 12.5 25.00
7.2.5 RTD ACCURACY TEST
The SR469 specification for RTD input accuracy is
±
2
°
. Perform the steps below to verify accuracy.
1. alter the following setpoints:
SETPOINT S8:RTD TEMPERATURE\RTD TYPE\STATOR RTD TYPE: 100 ohm Platinum
(select desired type)
SETPOINT S8:RTD TEMPERATURE\RTD #1\RTD #1 APPLICATION: Stator
(repeat for RTDs 2-12)
2.
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 and
verify accuracy of the measured values. View the measured values in:
ACTUAL VALUES A2:\METERING DATA\TEMPERATURE