ABB RELION RER670, Applications Manual

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• ZGTPDIS function is using full cycle DFT filtering. Thus, all higher
harmonics are effectively suppressed in measured current and voltage signals.
• The start time of the individual underimpedance zones is typically slightly
bigger than one fundamental power system cycle.
• If directional operation is required (e.g. operation for faults in forward
direction only), the operation of the individual underimpedance zones can be
supervised by forward start of the directional overcurrent function D2PTOC.
Several instances of this function are readily available in the IED.
• Second harmonic blocking feature may be required for catenary protection.
For this purpose, second harmonic blocking feature available in D2PTOC
function can be utilized.
• Sometimes supervision by sudden change in current and/or voltage signals is
required for catenary protection. For this purpose, individual zones can be
supervised by outputs STDI and STDU from the FRWSPVC function. Several
instances of FRWSPVC function are readily available in the IED.
• To achieve any of the above mentioned supervisions, corresponding
configuration logic and appropriate setting in the PCM600 tool shall be done.
• For external supervision from any additional logic input BLKZx on the
ZGTPDIS function shall be used in the IED configuration.
7.3.5 Wrong phase coupling protection
GUID-4BD84BB2-3BA4-4182-8534-256BA08B51BA v1
The ZGTPDIS function in combination with directional overcurrent function
D2PTOC and associated configuration logic can be utilized for wrong phase
coupling protection. The operating characteristic as shown in Figure
46 can be
easily achieved. To achieve such application, a simple configuration logic and
appropriate setting in the PCM600 tool shall be done.
1MRK 506 375-UEN A
Section 7
Impedance protection
Railway application RER670 2.2 IEC 155
Application manual