basic time tGL2, the UL1E will be checked against a set limit UL1E < U0Min at
the end of 100ms after the reset of starting element.
The basic time tGL2 is effective only during the underimpedance or residual
overcurrent start. If the voltage UL1E is greater than the set limit U0Min
, the start
signal is maintained. A trip will occur if the voltage UL1E does not fall below the
set limit by the end of extra time t1L2 to t6L2 that are assigned to the respective
zones.
ModePhPref: In compensated earthed systems, phase L2 will be specially treated.
Two operation modes i.e. Equal priority and L1 before L2 of phase preference
variants are implemented. The default is set to Equal priority.
OpModet0L2: This is used for Off/On operation of the t0L2 timer if phase
preference is set.
t0L2: This is an additional time delay to the trip phase L2 in stub line.
OpModet1L2: This is used for Off/On operation of the t1L2 timer if phase
preference is selected. The default setting is On.
t1L2: This is an additional time delay to trip phase L2 if the phase preference is set
to trip phase L2 in zone 1. The default setting is 1.5s.
OpModet2L2: This is used for Off/On operation of the t2L2 timer if phase
preference is selected. The default setting is Off.
t2L2: This is an additional time delay to trip phase L2 if the phase preference is set
to trip phase L2 in zone 2. The default setting is 2.5s.
OpModet3L2: This is used for Off/On operation of the t3L2 timer if phase
preference is selected. The default setting is Off.
t3L2: This is an additional time delay to trip phase L2 if the phase preference is set
to trip phase L2 in zone 3. The default setting is 0.0s.
OpModet4L2: This is used for Off/On operation of the t4L2 timer if phase
preference is selected. The default setting is Off.
t4L2: This is an additional time delay to trip phase L2 if the phase preference is set
to trip phase L2 in zone 4. The default setting is 0.0s.
OpModet5L2: This is used for Off/On operation of the t5L2 timer if phase
preference is selected. The default setting is Off.
t5L2: This is an additional time delay to trip phase L2 if the phase preference is set
to trip phase L2 in zone 5. The default setting is 0.0s.
OpModet6L2: This is used for Off/On operation of the t6L2 timer if phase
preference is selected. The default setting is Off.
Section 7 1MRK 506 375-UEN A
Impedance protection
112 Railway application RER670 2.2 IEC
Application manual
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