GE Multilin
B90 Low Impedance Bus Differential System
3-13
3 HARDWARE
3.2 WIRING
3
Figure 3–13: CONTROL POWER CONNECTION
3.2.4 CT AND VT MODULES
Information on the CT and VT modules for the B90 relay is shown below.
Verify that the connection made to the relay nominal current of 1 A or 5 A matches the sec-
ondary rating of the connected CTs. Unmatched CTs may result in equipment damage or inad-
equate protection.
Each AC current input has an isolating transformer and an automatic shorting mechanism that shorts the input when the
module is withdrawn from the chassis. There are no internal ground connections on the current inputs. Current transform-
ers with 1 to 50000 A primaries and 1 A or 5 A secondaries may be used.
Each B90 voltage input is intended for monitoring a single-phase voltage. The may include phase voltages or neutral volt-
age from the open-delta VT.
All CT and VT modules are available with enhanced diagnostics. These modules can automatically detect CT/VT hardware
failure and take the relay out of service.
Substitute the tilde “~” symbol with the slot position of the module in the following figure.
NOTE
Содержание B90 UR Series
Страница 28: ...1 20 B90 Low Impedance Bus Differential System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 114: ...4 28 B90 Low Impedance Bus Differential System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 272: ...6 14 B90 Low Impedance Bus Differential System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Страница 316: ...A 4 B90 Low Impedance Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 406: ...B 90 B90 Low Impedance Bus Differential System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 436: ...C 30 B90 Low Impedance Bus Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 446: ...D 10 B90 Low Impedance Bus Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...