6 F 2 T 0 1 7 2
Operating time check for IDMT curve
The testing circuit is shown in Figure 6.5.2.
Single-phase
current
source
A
TB1
GRE110
Time
counter
TB1
-13
-14
DC
power
supply
+
−
Start
Stop
OV
- (
∗
)
- (
∗
)
-12
BO
∗
TB2-
(
∗∗
)
(
∗∗
)
-
(
∗
), (
∗∗
) :
Connect the terminal number corresponding to the testing element.
Figure 6.5.2 Testing IDMT
One of the inverse time characteristics can be set, and the output signal numbers of the IDMT
elements are as follows:
Element
Signal No.
OC1-A
51
OC2-A
54
Fix the time characteristic to test by setting the scheme switch MOCI on the "PF prot." screen.
"Set.(change)" sub-menu
→
"Protection" screen
→
"Change set. (Act gp.=
∗
)
" screen
→
"Group
∗
"
screen
→
"Trip" screen
→
"Scheme sw" screen
→
"PF prot."
The test procedure is as follows:
•
Enter the signal number to observe the operating time at a binary output relay as shown in
Section 6.5.1 and press the ENTER key.
•
Apply a test current and measure the operating time. The magnitude of the test current should
be between 1.2
×
Is to 20
×
Is, where Is is the current setting.
•
Calculate the theoretical operating time using the characteristic equations shown in Section
2.1.1. Check that the measured operating time is within 5%.
167
Summary of Contents for GRE110
Page 183: ...6 F 2 T 0 1 7 2 Appendix B Signal List 184 ...
Page 191: ...6 F 2 T 0 1 7 2 Appendix C Event Record Items 192 ...
Page 196: ...6 F 2 T 0 1 7 2 Appendix D Binary Output Default Setting List 197 ...
Page 199: ...6 F 2 T 0 1 7 2 Appendix E Relay Menu Tree 200 ...
Page 210: ...6 F 2 T 0 1 7 2 Appendix F Case Outline 211 ...
Page 211: ...6 F 2 T 0 1 7 2 Case Outline for model 400 401 420 421 820 and 821 212 ...
Page 212: ...6 F 2 T 0 1 7 2 Case Outline for model 402 and 422 213 ...
Page 213: ...6 F 2 T 0 1 7 2 Appendix G Typical External Connection 214 ...
Page 245: ...6 F 2 T 0 1 7 2 Appendix J Return Repair Form 246 ...
Page 249: ...6 F 2 T 0 1 7 2 Customer Name Company Name Address Telephone No Facsimile No Signature 250 ...
Page 250: ...6 F 2 T 0 1 7 2 Appendix K Technical Data 251 ...
Page 256: ...6 F 2 T 0 1 7 2 Appendix L Symbols Used in Scheme Logic 257 ...
Page 259: ...6 F 2 T 0 1 7 2 Appendix M Modbus Interoperability 260 ...
Page 289: ...6 F 2 T 0 1 7 2 Appendix N IEC60870 5 103 Interoperability 290 ...
Page 296: ...6 F 2 T 0 1 7 2 Appendix O PLC Default setting 297 ...
Page 298: ...6 F 2 T 0 1 7 2 Appendix P Inverse Time Characteristics 299 ...
Page 304: ...6 F 2 T 0 1 7 2 Appendix Q IEC61850 Interoperability 305 ...