Siemens SIMPRO-100 - RTD and Power Measurement Accuracy; RTD Input Measuring Accuracy Test

SIMPRO-100
Commissioning
7
PRIM-2400C 105
7.3.3 Neutral Current Measuring
Accuracy
1. Connect one current source to the IN current
input (5 A or 1 A, as indicated by the INTAP
setting) to test neutral current measuring
accuracy.
2. Using the front-panel Set Relay\Relay
Elements\General Data functions or serial
port SHOW command, note the CTRN
setting.
3. Turn on the current source and increase the
current applied to the relay. Use the
front-panel Meter Values\Instantaneous Meter
function to view the relay neutral current
measurement. For the applied current values
shown in Table 7.4, the relay should display
neutral current magnitudes equal to the
applied current magnitude times the CTRN
setting.
Table 7.4 Neutral Current Measuring Accuracy
7.3.4 Current Unbalance
Element Accuracy
1. Connect the current sources to the IA, IB, and
IC current inputs (5 A or 1 A, as indicated by
the ITAP setting).
2. Using the front-panel Set Relay\Relay
Elements\General Data and Set Relay\Relay
Elements\Thermal Model Elements functions
or serial port SHOW command, note the CTR,
PHROT, and FLA settings.
3. Set the current source phase angles to apply
balanced three-phase currents. Refer to
Figure 7.1, page 100 for the correct angles
that depend on the PHROT setting.
4. Turn on the current sources and increase the
current applied to the relay. Refer to Table 7.5
to determine the appropriate magnitude for
each phase current. Use the front-panel
Meter Values\Instantaneous Meter function to
view the unbalance current measurement
(U/B = xx%). For each applied current value
shown in Table 7.5, the relay should display
unbalance current magnitude equal to the
expected reading percent shown.
Table 7.5 Current Unbalance Measuring Accuracy
|I| Applied
(A secondary)
Expected Reading
(CTRN o |I| A primary)
IN Reading
(A primary)
0.05 • INTAP
0.10 • INTAP
0.25 • INTAP
0.50 • INTAP
1.00 • INTAP
2.00 • INTAP
|I| Applied
(A secondary)
Expected Reading
(%)
Actual Reading
(%)
|IA| = 0.9 • FLA
7%
|IB| = FLA
|IC| = FLA
|IA| = 0.75 • FLA
17%
|IB| = FLA
|IC| = FLA
|IA| = FLA
12%
|IB| = 1.2 • FLA
|IC| = 1.2 • FLA
|IA| = 0.9 • FLA
13%
|IB| = 1.1 • FLA
|IC| = 1.1 • FLA