ABB REG670 Product Manual page 89

Generator protection REG670 2.2 and Injection equipment REX060,
REX061, REX062
Product version: 2.2.1
Table 78. General current and voltage protection CVGAPC , continued
Function
Undervoltage:
Critical impulse time
Impulse margin time
Table 79. Rotor earth fault protection based on General current and voltage protection (CVGAPC) and RXTTE4
Function
For machines with:
• rated field voltage up to
• static exciter with rated supply
voltage up to
Supply voltage 120 or 230 V
Operate earth fault resistance
value
Influence of harmonics in the DC
field voltage
Permitted leakage capacitance
Permitted shaft earthing
resistance
Protective resistor
ABB
Range or value
10 ms typically at 1.2 x U
U
set
15 ms typically
SEMOD175176-2 v5
Range or value
350 V DC
700 V 50/60 Hz
50/60 Hz
Approx. 1–20 kΩ
Negligible influence of 50 V, 150
Hz or 50 V, 300 Hz
(1–5) μF
Maximum 200 Ω
220 Ω, 100 W, plate
(the height is 160 mm (6,2
inches) and width 135 mm (5,31
inches))
Accuracy
to 0.8 x -
set
-
1MRK 502 074-BEN A
89