ABB Remote I/O RIO600 Installation And Commissioning Manual page 23

1MRS757488 H
RIO600
Installation and Commissioning Manual
underground cables, regardless of the earth-fault type (continuous, transient or
intermittent) or the fault resistance value (low or high ohmic).
The FPI module incorporates the latest fault-detection algorithms used in the Relion
family. With an easy-to-use multifrequency admittance-based (MFA) earth-fault
detection algorithm, it accurately detects solid, resistive and intermittent earth faults.
Practical sensitivity of up to 10 kΩ of the fault resistance can be achieved in
symmetrical networks. This new functionality is suitable for high-impedance earthed
networks, and especially for compensated and unearthed networks where accurate
and selective earth-fault detection is more challenging due to low fault currents. With
the use of the negative-sequence overcurrent protection function, it is easier to detect
single-phase and phase-to-phase faults or unbalanced loads which are due to broken
conductors or unsymmetrical feeder voltages, for example. The selective FPI
functionality for single-phase earth faults in high-impedance earthed networks (that
is, in compensated, unearthed and high-resistance earthed systems) is available. FPI
functionality can be applied as single-phase earth-fault FPI in case of overhead lines
and underground cables and is based on phase current measurements only which can
be done with conventional current transformers (CTs) or with sensors (Rogowski
coils). With the fault passage information, the faulted line section can be quickly
identified, and manual or automatic fault isolation and supply restoration can be
initiated. The three-phase inrush detector function INRPHAR can be used to
coordinate transformer inrush situations in distribution networks. The fuse failure
supervision function SEQSPVC can be used to block the voltage measuring functions
when failure occurs in the secondary circuits between the voltage transformer (or
combi sensor or voltage sensor) and the protection relay to avoid misoperations of the
voltage protection functions.
Ethernet switch
Analog and binary horizontal
IEC 61850
GOOSE communication
GUID-4D002AA0-E35D-4D3F-A157-01F1A3044DDB V4 EN
Figure 2: Conceptual picture of a typical system setup
ABB
MicroSCADA Pro/
System 800xA
Utility: IEC 60870-5-104
Industry: OPC
COM600S
Web HMI
PCM600
Analog and binary horizontal
GOOSE communication
Section 3
RIO600 overview
COM600S
Web HMI
Ethernet switch PCM600
IEC 61850
15