Users Manual ACS 501

User's Manual EN 60019134ASEA BROWN BOVERI  SAMI GSFrequency Converters ACS 501 2.2 to 75 kW User's ManualCode: EN 60019134 C GSVBC-UML1A1/EN 1995-08-07/EPv:\markdocu\acs500\usermanu\501\en1  SAMI GSSafety InstructionsONLY A COMPETENT ELECTRICIAN SHOULD CARRY OUT THE ELECTRICAL INSTALLATIONSAMI GS must always be earthed through an earthing conductor connected to the earthing terminal. If SAMI GS is connected to a system without system earth, the earth fault protection must be capable of starting at earth fault currents containing high frequency and DC components. SAMI GS' earth fault protection guards the frequency converter only against earth faults occuring in the motor or the motor cable. Fault current circuit breakers do not necessarily operate properly with frequency converters. Circuit breaker function should be checked for possible earth fault currents arising in a fault situation. Warning symbols For your own safety please pay special attention to instructions containing these symbols.The Motor Control Card's capacitors contain dangerous DC voltage levels. After disconnecting the supply, wait at least 5 minutes after the display readout on the control panel has disappeared before taking any measurements. Dangerous external control voltages may be present on the relay outputs of the Control Interface Card and Option Cards. Pay attention to the following instructions: - Do not work on the frequency converter when power is applied. - Never connect mains voltage to drive output terminals (U2,V2,W2). - Do not make any voltage withstand tests on any part of the unit. Disconnect motor cables before taking any measurements on the motor or motor cables. - Make sure that power factor correction capacitors are not connected between the drive and the motor. - Do not touch the IC-circuits on the Control Interface and Motor Control Cards. Static voltage may destroy the circuit.