Operating Zones - ABB RELION RET670 Applications Manual
Relion 670 series transformer protection version 2.2 ansi
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Also See for RELION RET670:
- Applications manual (888 pages) ,
- Commissioning manual (328 pages) ,
- Installation and commissioning manual (240 pages)
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1MRK 504 163-UUS A
8.21.2.1
Transformer protection RET670 2.2 ANSI
Application manual
Operating zones
Z3Fwd
Z2Fwd
ImpedanceAn
g
ImpedanceAn
Z3Rev
g
Z2Rev
IEC11000308 V3 EN-US
Zone3
Zone2
Zone1
Y/Y
REG670
A) Power system model
Z1Fwd
ImpedanceAn
Z1Rev
B) Typical setting of zones for under
impedance relay
Section 8
Impedance protection
GUID-FE7ADB29-3A48-41BF-AE43-94884D305A29 v2
D/Y
g
R(ohm)
IEC11000308-3-en.vsd
503
- Quick Links:
- Main Protection Functions
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