Hitachi Relion 670 Series Applications Manual page 128
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Also See for Relion 670 Series:
- Applications manual (354 pages) ,
- Commissioning manual (284 pages) ,
- Product manual (192 pages)
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Section 7
Impedance protection
RFPPFwZ3: This may be set identical to setting RFPEFwZ3 which is 40.13 Ohm.
TimerSelZ3: For Zone timer selection mode of zone 3. Set this to Timers separated.
OpModetPEZ3: Set this to On.
tPEZ3: Choose a time delay for zone 3 with a margin to assure selectivity to zone 2 of adjacent lines.
A delay time difference of 0.4 s between the zones is sufficient. The time delay for zone 3 therefore
can be set to 0.8 s.
OpModetPPZ3: Set this to On.
tPPZ3: Set this identical to tPPZ3 = 0.8 s.
Phase selection
ModePhSelKI: Set this to Off.
KI: Set this to 1.2.
I01: To detect high short circuit current during blocking time tI01 when starting element impedance
loop has picked up. Set at 400% IB.
ModeI0StRel: Set this to L1E and L2E
I0MinPhSel: Set this to 4% IB.
tI0: The delay time for residual overcurrent start. Residual overcurrent start is delayed by settable
time delay tI0. Set this to 0.2 s.
tI01: The blocking time of distance measuring for transient earth fault. Set this to 0.1 s.
Phase preference
ModePhPref: Set this to L1 before L2.
OpModet1L2: Set this to On.
t1L2: Set this to 1.0s.
OpModet2L2: Set this to On.
t2L2: Set this to 2.0s.
OpModet3L2: Set this to On.
t3L2: Set this to 3.0s.
U0Min: To check minimum residual voltage if start signal falls back. Set this to 50% UB.
tVL2: To extend the time for phase L2 to check the voltage shift. To time t0L2 to t6L2 is a settable
time tVL2 (operation time extension L2) added. Set this to 0.5s.
OpModetGL2: Set this to On.
tGL2: An additional time delay to trip L2 in compensated earthing. If the start signal continues to be
active, trip is given after expiration tPEZx plus tGL2. Set this to 0.6s.
dUOverdt: Set this to 100V/s.
122
Zones 4, 5 and 6 can be set on similar lines based on the application.
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1MRK506375-UEN Rev. N
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Railway application RER670
Application manual
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