ABB REG650 - Page 41

Impedance protection
Table 27. Power swing detection ZMRPSB
Function Range or value Accuracy
Reactive reach
(0.10-3000.00) W/phase
± 2.0% static accuracy
Conditions:
Voltage range: (0.1-1.1) x U
r
Current range: (0.5-30) x I
r
Angle: at 0 degrees and 85 degrees
Resistive reach
(0.10–1000.00) W/phase
Timers (0.000-60.000) s ± 0.5% ± 10 ms
Minimum operate current (5-30)% of IBase ± 1.0% of I
r
Table 28. Underimpedance protection for generators and transformers ZGCPDIS
Function
Range or value Accuracy
Number of zones 3 -
Forward positive sequence impedance (0.005-3000.000) Ω/
phase
± 2.0% static accuracy
Conditions:
• Voltage range: (0.1-1.1) x U
r
• Current range: (0.5-30) x I
r
• Angle: at 85 degrees
Reverse positive sequence impedance (0.005-3000.000) Ω/
phase
-
Angle for positive sequence impedance, (10-90) degrees -
Timers (0.000-60.000) s ± 0.5% ± 10 ms
Operate time 25 ms typically -
Reset ratio 105% typically -
Table 29. Loss of excitation LEXPDIS
Function
Range or value Accuracy
X offset of Mho top point (–1000.00–1000.00)% of Z
Base
± 2.0% of U
r
/I
r
Diameter of Mho circle (0.01–3000.00)% of Z
Base
± 2.0% of U
r
/Ir
Timers (0.00–6000.00) s ± 0.5% ± 25 ms
Operate time 55 ms typically -
Reset ratio 105% typically -
Table 30. Out-of-step protection OOSPPAM
Function
Range or value Accuracy
Impedance reach (0.00–1000.00)% of Zbase ± 2.0% of Ur/Ir
Characteristic angle (72.00–90.00) degrees ± 5.0 degrees
Start and trip angles (0.0–180.0) degrees ± 5.0 degrees
Zone 1 and Zone 2 trip counters (1-20) -
Generator protection REG650
1MRK 502 050-BEN B
Product version: 1.3
ABB 41