Micom P721, Technical Manual

Page: 271 / 334

Commissioning and Maintenance P72x/EN CM/C21
MiCOM P721/P723 Page 1/28
CONTENTS
1. REQUIREMENTS PRIOR TO COMMISSIONING 3
2. COMMISSIONING TEST ENVIRONMENT 4
2.1 Important notes 4
2.1.1 Injection test sets 4
2.1.2 Additional commissioning test equipment 4
2.1.3 Communication 4
2.2 Commissioning test sheets 4
3. PRODUCT VERIFICATION TESTS 5
3.1 Allocation of terminals 5
3.2 Electrostatic discharge (ESD) 5
3.3 Visual inspection 5
3.4 Earthing 5
3.5 Current transformers (CTs) 5
3.6 Auxiliary supply 6
3.7 Logic inputs 6
3.8 Logic outputs 7
3.9 RS 485 rear communication 7
4. SETTING CHECK 8
4.1 Settings 8
4.2 Measurements 8
4.2.1 MiCOM P721 8
4.2.2 MiCOM P723 8
4.3 Phase differential proteciton ([87] Threshold I Diff]) 9
4.3.1 Test wiring diagram 9
4.3.2 MiCOM settings 11
4.3.3 [87] Threshold I Diff with Fourier mode 11
4.3.4 [87] Threshold I Diff with Sample mode 12
4.3.5 [87] Threshold I Diff with Fast mode 12
4.4 Earth differential protection ([87N] Threshold I Diff) 13
4.4.1 Test wiring diagram 13
4.4.2 MiCOM settings 14
4.4.3 [87N] Threshold I Diff with Fourier mode 15
4.4.4 [87N] Threshold I Diff with Sample mode 15
4.4.5 [87N] Threshold I Diff with Fast mode 16