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Siemens Siprotec 5 7SS85 Techical Data

Siemens Siprotec 5 7SS85
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Undervoltage Protection with Positive-Sequence Voltage
Setting Values
Measured value Phase-to-phase
Phase-to-ground
Method of measurement Fundamental component
RMS value
Current-flow criterion On
Off
Pickup value 0.300 V to 175.000 V Increments of 0.001 V
Time delay 0.00 s to 60.00 s Increments of 0.01 s
Dropout ratio 1.01 to 1.20 Increments of 0.01
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout differential derived from the parameter Dropout ratio
If this parameter is not available, a dropout ratio of 95 % applies for the overvoltage and of 105 % for the
undervoltage functionality.
Minimum absolute dropout differential 150 mV sec.
Times
Operate time
Approx. 25 ms + OOT
37
at 50 Hz
Approx. 22 ms + OOT at 60 Hz
Dropout time Approx. 20 ms + OOT
Frequency Operating Range
0.9 ≤ f/f
rated
≤ 1.1 According to specified tolerances
10 Hz ≤ f < 0.9 f
rated
1.1 f
rated
< f ≤ 80 Hz
Slightly expanded tolerances
f < 10 Hz
f > 80 Hz
Inactive, maintained;
Dropout of the pickup induced by blocking or by
increasing the measurand beyond the dropout
threshold
Tolerances
Voltages
0.5 % of the setting value or 0.05 V
Currents 1 % of the setting value or 5 mA (I
rated
= 1 A) or
25 mA (I
rated
= 5 A, f
rated
± 10 %),
valid for protection-class current transformers
1 % of the setting value or 0.1 mA (I
rated
= 1.6 A) or
0.5 mA (I
rated
= 8 A, f
rated
± 10 %),
valid for instrument transformers
Time delays 1 % of the setting value or 10 ms
11.25
37
OOT (Output Operating Time) additional delay of the output medium used, see Chapter 11.1.4 Relay Outputs
Technical Data
11.25 Undervoltage Protection with Positive-Sequence Voltage
606 SIPROTEC 5, Low-Impedance Busbar Protection 7SS85, Manual
C53000-G5040-C019-6, Edition 06.2016

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Siemens Siprotec 5 7SS85 Specifications

General IconGeneral
BrandSiemens
ModelSiprotec 5 7SS85
CategoryIndustrial Equipment
LanguageEnglish

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