Voltage-Dependent Overcurrent Protection, Phases - Siemens 6MD85 Manual

11.16

Voltage-Dependent Overcurrent Protection, Phases

Setting Values for All Stage Types
Method of measurement
Overcurrent threshold
value
Time delay
Setting Values for Inverse-Time Overcurrent Protection Stages
Method of measurement
Dropout ratio of undervoltage
Undervoltage threshold value
Dropout
Time multiplier
Setting Values for Definite-Time Overcurrent Protection Stages
Seal-in voltage
Phase-to-phase voltage
Negative-sequence voltage V2
Time delay
Duration of V-seal-in time
Dropout for Inverse-Time Overcurrent Protection Stages
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout
Current
Voltage 68
Minimum absolute dropout differential
Protection-class current transformer
Instrument current transformer
Voltage transformer
Reset of the Integration Timer for Inverse-Time Overcurrent Protection Stages
Instantaneous
Disk emulation
68 The value is for the inverse-time overcurrent voltage-released stage.
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
For I = 1 A
rated
For I = 5 A
rated
68
68
68
11.16 Voltage-Dependent Overcurrent Protection, Phases
Fundamental component
RMS value
0.030 A to 35.000 A
0.15 A to 175.00 A
0.10 s to 60.00 s
Fundamental component
RMS value
1.01 to 1.20
0.300 V to 175.000 V
Disk emulation
Instantaneous
0.05 to 15.00
0.300 V to 175.000 V
0.300 V to 175.000 V
0.300 V to 200.000 V
0.00 s to 60.00 s
0.10 s to 60.00 s
95 % of 1.1 ⋅ threshold value
105 % of 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
150 mV sec.
With dropout
Approx. < 0.90 ⋅ threshold value
Technical Data
–
Increments of 0.001 A
Increments of 0.01 A
Increments of 0.01 s
–
Increments of 0.01
Increments of 0.001 V
–
Increments of 0.01
Increments of 0.001 V
Increments of 0.001 V
Increments of 0.001 V
Increments of 0.01 s
Increments of 0.01 s
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