ABB REL300 Instruction Manual page 8

I.L. 40-385.7
IMPORTANT APPLICATION NOTES
1. PILOT SYSTEM
a) The setting of Z3FR must be set to "REV" for system transient block and unequal pole external fault
clearing.
b) The minimum setting of FDGT should be 3 cycles unless for some special application.
c) Refer to section 3.4.7 for the setting of CIF if two REL300 relays control a single breaker and share a
common 52b output.
2. LOAD LOSS TRIP (LLT)
For a system if its maximum tapped load may exceed minimum through-load in the protected line, the set-
ting of LLT should be set to "NO". Refer to section 3.4.9 for the detailed information.
3. PHASE ROTATION
Check JMP-3 on the Microprocessor module. Position JMP-3 is used for ACB rotation if a jumper is placed.
Normally JMP-3 should be out for a system with phase rotation ABC.
4. PANG, GANG and ZR SETTINGS
The settings of PANG and GANG have been expanded from 40-90 to 0-90 degrees and the ZR setting has
been changed from 0.1-7.0 to 0.1-10.0 for underground cable application. The setting rule of PANG, GANG
and ZR must be followed: if the setting difference of PANG and GANG is greater than 50 degrees OR the
ZR setting is greater than 7.0, the operating range of the maximum fault current should be limited to 200
amperes; otherwise, the microcontroller may give an un-predicted result.
NOTE: CONVERSION FROM REL300 FIRMWARE VERSION V2.70 to V2.71 CAN BE
ACCOMPLISHED AS FOLLOWS:
1. Standard precautions of static voltage discharges should be observed such as using a grounded wrist strap
when handling Integrated Circuits.
2. Remove chips U103, U104, and U202 from the Microprocessor module.
3. Replace chips U103 (G19) and U104 (G20) and U202 into the sockets.
4. Check Jumper #3 on Microprocessor module for rotation ABC or ACB system which is shown on the Me-
tering mode. Normally, JMP3 should be "OUT" for ABC system. Spare jumpers should be placed on loca-
tions JMP10, 11 or 12. Remove any spare jumper (JMP10, 11 or 12) and replace it to JMP3 position for
ACB system.
5. Check Jumper #2 on Microprocessor module. Position 2-3 is used for single-pole trip logic only and posi-
tion 1-2 is used for three-pole trip or programmable output contact logic.
6. Reprogram REL300 password through INCOM
7. It is recommended to verify the relay's operation per Section 2 of Appendix H (Acceptance/Maintenance
Tests).
®
remote communication.
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