ABB REL-300 Instruction Leaflet page 8

I.L. 40-385.1B
5. Use Z1rI (Yes/No) to control the pilot reclose (AND84).
6. Correct the clock setting to avoid the dropout of AL1.
NOTE: CONVERSION FROM MDAR FIRMWARE VERSION V2.00 TO V2.01 CAN BE ACCOMPLISHED AS
FOLLOWS:
1. Standard precautions of the static voltage discharges should be observed such as using a grounded wrist
strap in order to remove the I.C. from the socket.
2. Remove chips U103 and U104 from the Microprocessor module.
3. Replace chips U103 (605) and U104 (606) into the sockets.
For BLOCKING system – Add a negated TBM (transient block) logic to the input of AND120 to prevent the
pickup of Carrier Stop if the TBM is set. Without the new logic, the Keying signal may be interrupted momentarily
by the Stop due to the logic inside the carrier equipment during the unequal pole clearing for the reverse external
fault.
Trademarks
All terms mentioned in this book that are known to be trademarks or service marks are listed below. In addition, terms
suspected of being trademrks or service marks have been appropriately capitalized. ABB Power T&D Company Inc.
cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as affecting the
validity of any trademark or service mark.
IBM and PC are registered trademarks of the International Busoness Machines Corporation.
WRELCOM is the registered trademark of the ABB Power T&D Company Inc.
INCOM is the registered trademark of the Westinghouse Electric Corporation
MDAR VERSION 2.02
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