Siemens SIPROTEC 5 Technical Data Manual page 50

High-voltage bay controller, v7.80 and higher

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Time multiplier

Minimum time of the curve

Additional time delay

Dropout

The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria

applies:

Dropout

Minimum absolute dropout differential

Protection-class current transformer

Instrument current transformer

Reset of the Integration Timer

Instantaneous

Disk emulation

Operate Curves and Dropout-Time Characteristic Curves according to IEC

Normal inverse: type A

Very inverse: type B

Extremely inverse: type C

Long-time inverse: type B

Operate Curves and Dropout-Time Characteristic Curves according to ANSI/IEEE

Inverse: type C

Short inverse

Long inverse

Moderately inverse

Very inverse

Extremely inverse

Definite inverse

Direction Determination

Type

Forward range

Dropout differential forward/reverse range

Directional sensitivity

SIPROTEC 5, High-Voltage Bay Controller, Manual

C53000-G5040-C015-A, Edition 05.2018

11.10 Directional Overcurrent Protection, Phases

0.00 to 15.00

0.00 s to 1.00 s

0.00 s to 60.00 s

95 % of 1.1 ⋅ threshold value

15 mA sec. (I

= 1 A) or

rated

75 mA sec. (I

= 5 A)

rated

0.5 mA sec. (I

= 1 A) or

rated

2.5 mA sec. (I

= 5 A)

rated

With dropout

Approx. < 0.90 ⋅ threshold value

See chapter