⎯
238
⎯
6 F 2 S 0 8 4 6
Residual voltage level detection is verified as follows:
•
Set IT to rated current and the three-phase voltage to rated voltage. Lower the magnitude of Va
while retaining the phase angle with the current and measure the voltage Va at which the
element operates. Operating residual voltage is expressed by (VR-Va), where VR is the rated
voltage. Check that the (VR-Va) is within 5% of the residual voltage setting.
6.5.1.5 Negative Sequence Directional Element DOCN
The testing circuit is shown in Figure 6.5.1.3.
DOCN elements and their output signal number are listed below.
Measuring element
Signal number
DOCNF 360
DOCNR 361
The following shows the case when testing DOCNF.
•
Press 1 (= Switch) on the Test screen to display the switch screen and enter 1 for DOCN-C to
test the DOCN elements.
•
Press 5 (= Logic circuit) on the Test screen to display the Logic circuit screen.
•
Enter 360 as a signal number to be observed at monitoring jack A and press the ENTER key.
•
Apply single-phase rated current Ia and single-phase test voltage V.
Set V to lag Ia by 90°.
•
Changing the magnitude of test voltage while retaining the phase angle with the current, and
measure the voltage at which the element operates. Check that the measured voltage
magnitude is within
±
5% of 15.5V.
The test of the DOCNR is same as that of DOCNF except for the voltage leading the current Ia by
90°.
Single-phase
voltage
source
A
φ
V
TB1
-11
Va
Single-phase
current
source
-14
TB1
-2
-1
Ia
GRZ100
Monitoring
jack
A
0V
DC
voltmeter
-A16
-A17
E
TB4
DC
power
supply
+
−
Figure 6.5.1.3 Testing DOCN Element
Содержание GRZ100 B Series
Страница 264: ... 263 6 F 2 S 0 8 4 6 Appendix A Block Diagram ...
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Страница 272: ... 271 6 F 2 S 0 8 4 6 Appendix B Signal List ...
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Страница 308: ... 307 6 F 2 S 0 8 4 6 Appendix C Variable Timer List ...
Страница 310: ... 309 6 F 2 S 0 8 4 6 Appendix D Binary Input Output Default Setting List ...
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Страница 322: ... 321 6 F 2 S 0 8 4 6 Appendix E Details of Relay Menu and LCD Button Operation ...
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Страница 340: ... 339 6 F 2 S 0 8 4 6 Appendix G Typical External Connections ...
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Страница 384: ... 383 6 F 2 S 0 8 4 6 Appendix J Return Repair Form ...
Страница 388: ... 387 6 F 2 S 0 8 4 6 Customer Name Company Name Address Telephone No Facsimile No Signature ...
Страница 389: ... 388 6 F 2 S 0 8 4 6 ...
Страница 390: ... 389 6 F 2 S 0 8 4 6 Appendix K Technical Data ...
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Страница 402: ... 401 6 F 2 S 0 8 4 6 Appendix L Symbols Used in Scheme Logic ...
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Страница 406: ... 405 6 F 2 S 0 8 4 6 Appendix M Example of Setting Calculation ...
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Страница 418: ... 417 6 F 2 S 0 8 4 6 Appendix N IEC60870 5 103 Interoperability and Troubleshooting ...
Страница 430: ... 429 6 F 2 S 0 8 4 6 Appendix O Programmable Reset Characteristics and Implementation of Thermal Model to IEC60255 8 ...
Страница 434: ... 433 6 F 2 S 0 8 4 6 Appendix P Inverse Time Characteristics ...
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Страница 438: ... 437 6 F 2 S 0 8 4 6 Appendix Q Failed Module Tracing and Replacement ...
Страница 444: ... 443 6 F 2 S 0 8 4 6 Appendix R Ordering ...
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