ABB RELION REX640 Technical Manual page 1591

1MRS759142 C
REX640
Technical Manual
I I I I
v coil fix reson
= + −
GUID-CA91E7B8-34AF-4BC3-862D-B1F7E40E0D1A V1 EN
The corresponding relative detuning is calculated as:
I I I
coil fix reson
+ −
v
= ⋅100%
I
reson
GUID-91AC8620-0EEF-4956-858E-56C82A1116A8 V1 EN
I Current of the adjustable ASC
coil
I Value of the fixed parallel coil
fix
I Current at resonance point
reson
If a fixed parallel coil is introduced in the network ("ON" or "Automatic"), the x axis
title of the resonance curve displayed on the HMI can be selected with the Resonance
curve Cur setting. Available options are:
• Icoil: Only the current of adjustable ASC
• Icoil + Ifix: Total current of adjustable ASC and fixed parallel coil
Statistics
The controller supports displaying resettable statistics. The statistics can be reset via
settings menu using Clear counters command.
Table 1429: Displayed statistics
Type Statistics
General Operation time
Tuning procedures
Tuned
Canceled tunings
Tuned at Uo max
Tuned at low limit
Tuned at high limit
Earth Transient earth-faults
faults
Permanent earth-faults
Table continues on next page
Description
Controller time in operation
Number of started tuning procedures
Number of successful tuning operations
Number of the canceled tuning procedures, that is,
delay has not elapsed
Number of tuning cases when coil movement has stopped to
V Res maximum position
Number of cases when coil final position is limited either by
low end position indication of the coil or the limited operating
Minimum current
range
Number of cases when coil final position is limited either by
high end position indication of the coil or the limited operating
range Maximum current
Number of transient earth faults (that is, fault time shorter
than time defined in Transient time EF setting)
Number of permanent earth faults (that is, fault time longer
than time defined in Transient time EF setting)
Section 9
Control functions
(Equation 349)
(Equation 350)
Tuning
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