ABB RELION REX640 Technical Manual page 961

Protection and control

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1MRS759142 F

It is also possible to block the lagging phase-earth loop,

"BLK lagging PE". If only the phase-to-phase loop or phase-to-earth loops must be

measured, settings

only" should be used, and if the logic is not required, "All loops" option should be

The tables summarize the available faulted loop selection logic schemes and their

operations. The logic is selected with the

Table 918: Supported faulted loop phase selection schemes for low-impedance

earthed networks and their influence on the RELEASE_PE monitored data

Element start

Table 919: Supported faulted loop phase selection schemes for low-impedance

earthed networks and their influence on the RELEASE_PP monitored data

Element start

Impedance protection zones

DSTPDIS has five flexible and configurable impedance zones Z1..Z5. The number of

active zones has to be selected by setting

zones can be set active by selection "All 5 zones" and only zone 1 is activated by

"Zone 1". The purpose of this setting is effectively dimming non-active zone settings

in PCM600 or the protection relay's HMI.

If only zones 1 and 3 should be activated, "Zones 1-3" should be selected and

then zone 2 timers can be disabled or BLOCK_Z2 can be activated to hide zone 2

Technical Manual

Ph Prf mode Lo Z GFC = "PP only" or Ph Prf mode Lo Z GFC = "PE

Ph Prf mode Lo Z GFC =

Ph Prf mode Lo Z GFC setting.

Ph Prf mode Lo Z GFC

Ph Prf mode Lo Z GFC

Select active zones . For example, all five

Protection functions