Danfoss TTS300 - Verifying the 3-Phase AC Input

3. Ifthecablescannotbesecurelyfastenedtotheinputterminal,theTerminalBlockisdamagedand
needstobereplaced.
4.11.1.3 Verifying the 3-Phase AC Input
1. TurnONtheACinputpower.
2. SetthemultimeterforACvoltagemeasurements.
3. PlacethemeterprobeononephaseoftheACinputterminalsandtheothermeterprobeonanother
phaseoftheACinputterminalsasshowninFigure4-79Measuringthe3-PhaseACInputVoltageon
theACInputTerminals-TTS300/TGS230andFigure4-80Measuring3-PhaseACInputVoltageonAC
InputTerminals(TTS/TGS/TTH/TGH(ExceptTTS300/TGS230).RepeatforallACinputterminals.Repeat
onloadsideofthefuses(TT300/TG230only).
Figure 4-79 Measuring the 3-Phase AC Input Voltage on the AC Input Terminals - TTS300/TGS230
Figure 4-80 Measuring 3-Phase AC Input Voltage on AC Input Terminals (TTS/TGS/TTH/TGH (Except TTS300/TGS230)
4. VerifythatthemetershowstheexpectedACmeasurementwithintherangeasindicatedinTable4-18
ExpectedACVoltageRangeonpage102.TheacceptableACinputvoltagerangeis+/-10%ofthe
nameplateACinputvoltage.
5. Ifthemeterdoesnotshowanyreading,itispossiblethereisnopowerfromtheACsource.Ensurethe
ACpowersourceisturnedONandtryagain.Ifthereisnopowerontheloadsideofthefuses,isolate
thepowerandcheckthefuses.
6. Ifthemeasuredvaluescorrespondtothespecifiedvaluesforallphases,theACinputvoltageisokay.
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