7/28/2019 Third Comment on Grp 02-06-11

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Matrishri Usha Jayaswal Mega Power Project DCPL-K9A052x270MW,CHANDWA TPS

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Ref.: K9A05/DCH-4/E/BHEL Annexure-A -Dated 02.06.2011Comments/Observation:- Electrical

Ref.: GENERATOR RELAY PANEL

Drawings:

1) Dwg. No. PE-DG-344-510-E001,Rev01 10 Shts: Single Line Diagram for Generator,GT& UAT Circuit

Metering & Protection.

2) Dwg. No. PE-DG-344-510-E002,Rev01 34Shts: Logic Diagram for Generator,GT& UAT Circui t

Protection. & Annunciation.

3) Dwg. No. PE-DG-344-510-E003,Rev01 7Shts: CT & VT Calculation for Generator,GT& UAT Circuit

Metering & Protection.

Action-4

Please note the following :-

1) Refer CT-1 :Provide CT with Ie 150mA at Vk/4 (Instead of Vk/4),BHELs clarification is not justified.

2)Refer CT-2: Provide CT Burden =75VA.

3) Refer CT-7: Provide CT Burden =75VA.

4) Refer CT-8: Provide CT Burden =75VA.

5) Refer CT-9: Note NGR current rating will 650A (BHEL,Rudrapur data sheet)

6) Refer CT-10: (Refer BHEL, Bhopal GTs R&D plate) Bushing CT Ratio: 500/1A and other CTparameter are not same with calculation. Please check and confirm the rating and calculation for bothCore of CT-10.

7) Refer CT-11: (Refer BHEL, Bhopal GTs R&D plate) Bushing CT Ratio: 500/1A and other CTparameter are not same with calculation. Please check and confirm

8) Refer CT-13A/13B: Provide CT Ration:1000/1A

9) Refer CT-14A/14B: Provide CT Ration:1000/1A

10)Refer CT-16A/16B: (Refer BHEL, Jhansi UTs R&D plate) Bushing NCT Details are asbelow,please check and confirm.

Core-1: 150/1A, 5P20, 30VA

Core-2: 300/1A, PS,Vk 10(RCT +5)V, Ie 15 mA at Vk/2,

11) Refer CT-17A/17B: (Refer BHEL, Jhansi UTs R&D plate) Bushing Line CT Details are asbelow,please check and confirm.

CT Details: 300/1A, PS,Vk 100(RCT +5)V, Ie 15 mA at Vk/2,

12) Refer CT-18A/18B: 6.6kV switchgear Incomer CT Details are as below, please check and

Correct the doc.

CT Details: 2500/1A, PS,Vk 585V, Ie 30 mA at Vk/2,

13) Refer VT-3: Provide VT Burden =75VA

14) Refer IVT-1: Provide IVT Burden =30VA

15).CT-17A/B: BHELs clarification is not justified.CT-17A/B will be used for 64RUATA/B.The location ofCT will be at BCT of UAT-A/B not in 6.6Kv switchgear. Refer connection for64RGT sheet no. 9 of 10 ofthis drawing as well as JPL project.

7/28/2019 Third Comment on Grp 02-06-11

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Matrishri Usha Jayaswal Mega Power Project DCPL-K9A052x270MW,CHANDWA TPS

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16)ProvideindependentCTforAVR.ThesamehasalsobeenconsideredinBHELEDNs DAVRdwg.17)ReferSheet8of10ofSLD,CTconnectionforfrequencyTransducerMKA02FE001Eisnotindicated.Indicatethesame.