2.2.5
Legend for Wiring Diagrams
In this legend designations of various device types are listed, e. g. transformer protection,
motor protection, generator protection, etc. Therefore it can occur that not every
designation actually appears on the wiring diagram of your device.
• FE — Connection of functional earth (see
)
• Power Supply — Connection for auxiliary power supply
• IA — Phase current input IA
• IB — Phase current input IB
• IC — Phase current input IC
• IX — Earth current input
• IA W1 … IC W1 — Phase current input L1…L3, winding side 1
• IA W2 … IC W2 — Phase current input L1…L3, winding side 2
• IX W1, IX W2 — Earth current input, winding side 1/2
• VA — Phase-to-neutral voltage VA
• VB — Phase-to-neutral voltage VB
• VC — Phase-to-neutral voltage VC
• VAB — Phase-to-phase voltage VAB
• VBC — Phase-to-phase voltage VBC
• VCA — Phase-to-phase voltage VCA
• VX — Fourth voltage measuring input for measuring residual voltage or for Synchro-
check
• RO — Relay Output
• NO / NC — Contact output, normally open / closed
• DI — Digital input
• COM — Common connection of digital inputs
• Out+, AnOut — Analog (0/4...20 mA or 0...10 V)
• In−, AnIn — Analog input (0/4...20 mA or 0...10 V)
• N.C. — Not connected
• DO NOT USE — Do not use
• SC — Self-supervision contact
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EMR-3MP0
2 Hardware
2.2 EMR-3MP0 – Installation and Wiring
