
⎯
237
⎯
6 F 2 S 0 8 4 6
IT
θ
Vb
Vc
Va
•
Adjust the magnitude of Va while retaining the conditions above and measure the voltage Va
at which the element operates.
•
The theoretical operating voltage is obtained by (IT
×
UVCZ + UVCV) when the setting reach
is UVCZ. Check that the measured voltage is within the above-mentioned error of the
theoretical voltage value. (The default setting of the UVCZ is 2.0 ohm for 5A rating and 10
ohm for 1A rating.)
Element UVCV UVCZ IT IT
×
UVCZ + UVCV
Measured voltage
UVCZ
6.5.1.4 Directional Earth Fault Element DEF
The testing circuit is shown in Figure 6.5.1.2.
DEF elements and their output signal number are listed below.
Measuring element
Signal number
DEFF 59
DEFR 58
The following shows the case when testing DEFF.
•
Press 5 (= Logic circuit) on the Test screen to display the Logic circuit screen.
•
Enter 59 as a signal number to be observed at monitoring jack A and press the ENTER key.
Residual current level detection is verified as follows:
•
Apply three-phase rated voltage and single-phase test current IT (= 3Io).
Set IT to lag Va by DEFF characteristic angle DEF
θ
. (The default setting of DEF
θ
is 85°.)
•
Lower
Va to 10 V to generate a residual voltage. Changing the magnitude of IT while retaining
the phase angle with the voltages, and measure the current at which the element operates.
Check that the measured current magnitude is within
±
5% of the current setting.
IT
θ
3Vo
Vb
Vc
Va
Va
Summary of Contents for GRZ100 B Series
Page 264: ... 263 6 F 2 S 0 8 4 6 Appendix A Block Diagram ...
Page 271: ... 270 6 F 2 S 0 8 4 6 ...
Page 272: ... 271 6 F 2 S 0 8 4 6 Appendix B Signal List ...
Page 307: ... 306 6 F 2 S 0 8 4 6 ...
Page 308: ... 307 6 F 2 S 0 8 4 6 Appendix C Variable Timer List ...
Page 310: ... 309 6 F 2 S 0 8 4 6 Appendix D Binary Input Output Default Setting List ...
Page 321: ... 320 6 F 2 S 0 8 4 6 ...
Page 322: ... 321 6 F 2 S 0 8 4 6 Appendix E Details of Relay Menu and LCD Button Operation ...
Page 331: ... 330 6 F 2 S 0 8 4 6 ...
Page 340: ... 339 6 F 2 S 0 8 4 6 Appendix G Typical External Connections ...
Page 377: ... 376 6 F 2 S 0 8 4 6 ...
Page 384: ... 383 6 F 2 S 0 8 4 6 Appendix J Return Repair Form ...
Page 388: ... 387 6 F 2 S 0 8 4 6 Customer Name Company Name Address Telephone No Facsimile No Signature ...
Page 389: ... 388 6 F 2 S 0 8 4 6 ...
Page 390: ... 389 6 F 2 S 0 8 4 6 Appendix K Technical Data ...
Page 401: ... 400 6 F 2 S 0 8 4 6 ...
Page 402: ... 401 6 F 2 S 0 8 4 6 Appendix L Symbols Used in Scheme Logic ...
Page 405: ... 404 6 F 2 S 0 8 4 6 ...
Page 406: ... 405 6 F 2 S 0 8 4 6 Appendix M Example of Setting Calculation ...
Page 417: ... 416 6 F 2 S 0 8 4 6 ...
Page 418: ... 417 6 F 2 S 0 8 4 6 Appendix N IEC60870 5 103 Interoperability and Troubleshooting ...
Page 434: ... 433 6 F 2 S 0 8 4 6 Appendix P Inverse Time Characteristics ...
Page 437: ... 436 6 F 2 S 0 8 4 6 ...
Page 438: ... 437 6 F 2 S 0 8 4 6 Appendix Q Failed Module Tracing and Replacement ...
Page 444: ... 443 6 F 2 S 0 8 4 6 Appendix R Ordering ...
Page 447: ......