Siemens SIPROTEC 7SK80 User Manual

Technical Data
4.15 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s)
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
376
4.15 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s)
Displacement Voltage Element For all Types of Ground Faults
Phase Detection for Ground Faults on an Ungrounded System
Ground Fault Pickup for All Types of Ground Faults (Definite Time Characteristic)
Displacement voltage, measured V0 > 1.8 V to 200.0 V Increments 0.1 V
Displacement voltage, calculated 3V
0
> 10.0 V to 225.0 V Increments 0.1 V
Pickup delay T-DELAY Pickup 0.04 s to 320.00 s or ∞ Increments 0.01 s
Additional tripping delay 64-1 DELAY 0.10 s to 40000.00 s or ∞ (dis-
abled)
Increments 0.01 s
Operating time approx. 50 ms
Dropout value 0.95 or (pickup value – 0.6 V)
Measurement tolerance
V0 > (measured)
3V0 > (calculated)
3 % of setting value or 0.3 V
3 % of setting value or 3 V
Operating time tolerances 1 % of setting value or 10 ms
Measuring Principle Voltage measurement (phase-Ground)
V
PHASE MIN
(Ground Fault Phase) 10 V to 100 V Increments 1V
V
PHASE MAX
(Healthy Phase) 10 V to 100 V Increments 1V
Measurement Tolerance acc. to VDE 0435, Part 303 3 % of setting value or 1 V
Pickup current 50Ns-2 PICKUP, 50Ns-1 PICKUP
for sensitive 1 A transformer
for sensitive 5 A transformer
for normal 1 A transformer
for normal 5 A transformer
0.001 A to 1.600 A
0.005 A to 8.000 A
0.05 A to 35.00 A
0.25 A to 175.00 A
Increments 0.001 A
Increments 0.005 A
Increments 0.01 A
Increments 0.05 A
Time delay 50Ns-2 DELAY, 50Ns-1 DELAY 0.00 s to 320.00 s or ∞ (dis-
abled)
Increments 0.01 s
Dropout time delay 50Ns T DROP-OUT 0.00 s to 60.00 s Increments 0.01 s
Operating time ≤ 50 ms (non-directional)
≤ 50 ms (directional)
Dropout ratio approx. 0.95 for 50Ns > 50 mA
Measurement tolerance
sensitive
non-sensitive
3 % of setting value or 1 mA for I
Nom
= 1A, or 5mA for
I
Nom
= 5 A
for setting values < 10 mA approx. 20 %
3 % of setting value or 15 mA for I
Nom
= 1 A, or 75 mA
for I
Nom
= 5 A
Operating time tolerance 1 % of setting value or 10 ms

Siemens SIPROTEC 7SK80 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SK80
Category	Protection Device
Language	English