Siemens SIPROTEC 7UM62 - 4.28 Sensitive Rotor Earth Fault Protection with 1 to 3 Hz Square Wave Voltage Injection (ANSI 64 R - 1 to 3 Hz)

Technical Data
4.28 Sensitive Rotor Earth Fault Protection with 1 to 3 Hz Square Wave Voltage Injection (ANSI 64R - 1 to 3 Hz)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
504
4.28 Sensitive Rotor Earth Fault Protection with 1 to 3 Hz Square Wave
Voltage Injection (ANSI 64R - 1 to 3 Hz)
Setting Ranges / Increments
Times
Dropout Ratios
Tolerances
Influencing Variables for Pickup Values
Alarm Stage R
E ALARM
5 kΩ to 80 kΩ Increments 1 kΩ
Tripping Stage R
E TRIP
1 kΩ to 10 kΩ Increments 1 kΩ
Time Delay 0.00 s to 60.00 s
or ∞ (ineffective)
Increments 0.01 s
Pickup threshold Q
C
< of alarm indication 0.00 mAs to 1.00 mAs Increments 0.01 mAs
Pickup Time approx. 1 to 1.5 s (depends on 7XT71)
Dropout Time approx. 1 s to 1.5 s
Resistance R
E
approx. 1.25
Charge Q
C
< 1.2 or 0.01 mAs
Resistance approx. 5 % or 0.5 kΩ at 0.15 µF ≤ C
E
< 1 µF
approx. 10 % or 0.5 kΩ at 0.15 µF ≤ C
E
< 3 µF
Time Delay 1 % or 10 ms
Admissible Rotor-Earth Capacitance 0.15 µF to 3 µF
Power Supply DC Voltages in Range 0.8 ≤ U
Aux
/U
AuxN
≤ 1.15 ≤ 1 %
Temperature in range 23.00 °F (–5 °C) ≤ Θ
amb
≤ 131.00 °F (55 °C) ≤ 0.5 % / 10 K
Frequency in Range 0.95 ≤ f/f
N
≤ 1.05 ≤ 1 %