Technical Data - ABB Relion 670 Series Technical Reference Manual

Section 6
Impedance protection
Table 121: ZMHPDIS (21) Group settings (advanced)
Name Values (Range)
OffsetMhoDir Non-directional
Forward
Reverse
OpModetPG Disabled
Enabled
OpModetPP Disabled
Enabled
6.4.6
260
Unit Step
- -
- -
- -

Technical data

Table 122: ZMHPDIS (21) technical data
Function
Number of zones with selectable
directions
Minimum operate current
Positive sequence impedance,
phase-to-ground loop
Positive sequence impedance
angle, phase-to-ground loop
Reverse reach, phase-to-ground
loop (Magnitude)
Magnitude of ground return
compensation factor KN
Angle for ground compensation
factor KN
Dynamic overreach
Timers
Operate time
Reset ratio
Reset time
Default Description
Non-directional Direction mode for offset mho
Enabled Operation mode Disable/ Enable of Zone
timer, Ph-G
Enabled Operation mode Off / On of Zone timer, Ph-ph
Range or value
Max 5 with selectable direction
(10–30)% of I
Base
(0.005–3000.000) W/phase
(10–90) degrees
(0.005–3000.000) Ω/phase
(0.00–3.00)
(-180–180) degrees
<5% at 85 degrees measured
with CVT's and 0.5<SIR<30
(0.000-60.000) s
20 ms typically (with static
outputs)
105% typically
30 ms typically
1MRK505222-UUS C
Accuracy
-
-
± 2.0% static accuracy
Conditions:
Voltage range: (0.1-1.1) x V
n
Current range: (0.5-30) x I
n
Angle: 85 degrees
-
± 0.5% ± 10 ms
-
-
-
Technical reference manual