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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
Summary of Contents for SIMPRO-100
Page 1: ...SIMPRO 100 Motor Protection Relay Instruction Manual Document No PRIM 2400C ...
Page 12: ...Contents SIMPRO 100 x PRIM 2400C ...
Page 16: ...Contents SIMPRO 100 xiv PRIM 2400C ...
Page 42: ...3 SIMPRO PC Software SIMPRO 100 40 PRIM 2400C ...
Page 100: ...6 ASCII Serial Port Operation SIMPRO 100 98 PRIM 2400C ...
Page 127: ...SIMPRO 100 Event Analysis 9 PRIM 2400C 125 Figure 9 2 Example SER Report ...
Page 136: ...10 Maintenance Troubleshooting SIMPRO 100 134 PRIM 2400C ...
Page 138: ...A Firmware Versions SIMPRO 100 136 PRIM 2400C ...
Page 206: ...D SIMPRO PC Compatibility Features SIMPRO 100 204 PRIM 2400C ...
Page 214: ...E Motor Thermal Element SIMPRO 100 212 PRIM 2400C ...
Page 230: ...F SIMPRO 100 Relay Settings Sheets SIMPRO 100 228 PRIM 2400C ...
Page 239: ......