ABB RELION REX640 Technical Manual page 279

Protection and control

Hide thumbs Also See for RELION REX640:

Table of Contents

1MRS759142 F

Table 265: Analog inputs

Operation principle

The function can be enabled and disabled with the

corresponding parameter values are "on" and "off".

The switch logic depends on inputs SWITCH_TO2, SWITCH_TO3 and SWITCH_TO4.

Source 1 is selected as default and switching is done on increased priority.

Table 266: Switching operation

Control input signals

Outputs ALARM and IRES_ALARM indicate bad quality data of system measurements

for selected I3P and IRES, respectively.

Outputs WARNING and IRES_WARNING indicate questionable quality data of system

measurements for selected I3P and IRES, respectively.

Can be connected to GRPOFF

No difference

Technical Manual

See the preprocessing function blocks in this document for the possible

signal sources. The GRPOFF signal is available in the function block called

For this function, the setting is hidden and fixed to "on".

GRPOFF signal must be connected to unused current inputs. GRPOFF

signal is available as output from the Protection function block.

If the numbers of channels connected to I3P1...I3P4 and IRES1...IRES4

does not match with the number of connected SWITCH_TOx inputs, the

configuration of the function fails.

Three-phase currents

Residual current (measured or calculated)

Basic functions

Operation setting. The