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Modified Settings

The document discusses overcurrent protection settings for the transformer and line including existing and modified settings for DMT and IDMT stages of earth and phase fault protection with settings for mode, threshold, time dial, and operate delay.

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Ardhendu Sekhar Bhanja
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© © All Rights Reserved
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45 views1 page

Modified Settings

The document discusses overcurrent protection settings for the transformer and line including existing and modified settings for DMT and IDMT stages of earth and phase fault protection with settings for mode, threshold, time dial, and operate delay.

Uploaded by

Ardhendu Sekhar Bhanja
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Overcurrent Protection settings of transformer Remote end Breaker proposed setting

DMT Stage of Earth fault protection IDMT Stage of Earth fault protection

Setting name Existing Settings Modified Settings Unit Setting name Modified Settings Unit

Mode on on -- Mode on --
1.25 (Primary
Threshold 2.40 (Primary Amp=1920A) A Type of character. curve IEC normal inverse --
Amp=1000A)
Operate delay 0.1 0.1 s Threshold 0.3 (Primary Amp=120A) A

IDMT Stage of Earth fault protection Time dial 0.33 --

Setting name Existing Settings Modified Settings Unit IDMT Stage of Phase fault protection

Mode on on -- Mode on --

Type of character. curve IEC normal inverse IEC normal inverse -- Type of character. curve IEC normal inverse --

Threshold 0.10 (Primary Amp=80A) 0.10 (Primary Amp=80A) A Threshold 1.0 (Primary Amp=400A) A

Time dial 0.13 0.26 -- Time dial 0.26 --

Standby earth Fault Protection of HV side-51NS-HV

Setting name Existing Settings Modified Settings Unit

Mode on on --
3.33 (Primary
Threshold 6.40 (Primary Amp=1920A) A
Amp=1000A)
Operate delay 0.3 0.3 s

Overcurrent Protection settings of line


DMT Stage of Earth fault protection

Setting name Existing Settings Modified Settings Unit

Mode on on --

Threshold 0.2 (Primary Amp=160A) 2.65 (Primary Amp=2120A) A

Operate delay 1 0.3 s

IDMT Stage of Earth fault protection

Setting name Existing Settings Modified Settings Unit

Mode on on --

Type of character. curve IEC normal inverse IEC normal inverse --

Threshold 0.2 (Primary Amp=160A) 0.12 (Primary Amp=96A) A

Time dial 1 0.26 --

DMT Stage of Phase fault protection

Setting name Existing Settings Modified Settings Unit

Mode on on --

Threshold 1.0(Primary Amp=800A) 4 (Primary Amp=3200A) A

Operate delay 0.2 0.25 s

IDMT Stage of Phase fault protection

Setting name Existing Settings Modified Settings Unit

Mode on on --

Type of character. curve IEC normal inverse IEC normal inverse --

Threshold 0.10 (Primary Amp=800A) 0.5 (Primary Amp=400A) A

Time dial 0.2 0.2 --

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