Function Block; Functionality; Analog Channel Configuration - ABB RELION REX640 Technical Manual

1MRS759142 C
4.2.3.2
4.2.3.3
4.2.3.4
REX640
Technical Manual

Function block

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Figure 239: Function block

Functionality

The transient/intermittent earth-fault protection function INTRPTEF is a function
designed for the protection and clearance of permanent and intermittent earth faults in
distribution and sub-transmission networks. Fault detection is done from the residual
current and residual voltage signals by monitoring the transients.
The operating time characteristics are according to definite time (DT).
The function contains a blocking functionality. It is possible to block function outputs,
timers or the function itself.

Analog channel configuration

INTRPTEF has two analog group inputs which must be properly configured.
Table 501: Analog inputs
Input
IRES
URES
See the preprocessing function blocks in this document for the
possible signal sources.
There are a few special conditions which must be noted with the configuration.
Table 502: Special conditions
Condition
URES calculated
Improper analog channel configuration causes a validation error if the analog
channels are not completely configured or they do not match with certain settings. For
troubleshooting, check the contents of this chapter and also the preprocessing blocks
Protection functions
Description
Residual current (measured or calculated)
Residual voltage (measured or calculated)
Description
The function requires that all three voltage
channels are connected for calculating the
VT connection must be
residual voltage. Setting
"Wye" in that particular UTVTR.
Section 4
445