SEMOD175144-2 v9
Table 45. Loss of excitation LEXPDIS
Function
Range or value
Accuracy
X offset of Mho top point for
Zone 1 and Zone 2
(–1000.00–1000.00)% of Z
Base
±5.0% of U
r
/I
r
Diameter of Mho circle for Zone
1 and Zone 2
(0.0–3000.00)% of Z
Base
±5.0% of U
r
/I
r
Independent time delay for Zone
1 when impedance jumps from
the outside the set circle to the
center of the set circle
(0.00-6000.00) s
±0.2% or ±60 ms whichever is greater
Independent time delay for Zone
2 when impedance jumps from
the outside the set circle to the
center of the set circle
(0.00-6000.00) s
±0.2% or ±60 ms whichever is greater
Operate time, start when
impedance jumps from the
outside the set circle to the
center of the set circle
Min. = 35 ms
Max. = 50 ms
-
GUID-3740D5F1-3245-40EC-89B7-81297A3125D1 v2
Table 46. ROTIPHIZ technical data
Function
Range or value
Accuracy
Fault resistance sensitivity
Can be reached at steady state
operating condition of the machine
500 kΩ
Typically
20 - 50 kΩ
Injection frequency
(75.000 - 250.000) Hz
±0.1 Hz
Trip limit of fault resistance
(100 - 100000)Ω
5% of 1 kΩ at R
f
≤ 1 kΩ
5% of set value at 1 kΩ < R
f
≤ 20 kΩ
10% of set value at R
f
> 20 kΩ
Alarm limit of fault resistance
(100 - 1000000)Ω
5% of 1 kΩ at R
f
≤ 1 kΩ
5% of 10 kΩ at 1 kΩ < R
f
≤ 20 kΩ
10% of set value at 20 kΩ < R
f
≤ 200 kΩ
Operate time, start at R
f
~ 0 Ω and filter length
= 1 s
1.00 s typically
-
Operate time, trip at R
f
~ 0 Ω and filter length
= 1 s
3.00 s typically
-
Alarm time delay at R
f
~ 0 Ω and filter length =
1 s
(0.00 - 600.00) s
±0.2% or ±2.00 s whichever is greater
1MRK 502 068-BEN D
Generator protection REG670 2.1 IEC
Product version: 2.1
ABB
59
