Answer Drives GT3000, Hardware & Software Manual

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GT3000 Maintenance
48 IMGT30017EN
4A.2 Safety precautions
Qualified technicians shall perform all electrical maintenance and installation operations on
GT3000. Answer Drives is not responsible for damage caused by improper or unauthorized
service.
DANGER! RISK OF DEATH OR ELECTRICAL SHOCK! The following safety steps must be
strictly adhered to, before servicing the unit:
¾ Perform supply power lockout/tag out procedure and open the main disconnect to
the drive.
¾
Make sure that all power supplies coming into the drive (main supply and
auxiliary supplies) are disconnected before servicing the drive.
¾ Wait a minimum of ten (10) minutes after disconnecting the power supply. Let
the DC bus capacitor discharge before servicing the unit or accessing motor
terminals. Refer to the safety label that is placed on every drive.
¾ Before servicing the unit, wait 10 minutes after disconnecting all power supplies,
and verify that the DC voltage is less than 50V. Use a multimeter rated for 1000
volts DC or greater.
IGBT modules are sensitive to electrostatic charges. Handle with care to avoid damage. Do not
leave gate drive terminals open (gate-emitter). Keep the anti-static sponge or short circuit with a
metal jumper on the pins when not connected to the gate board. When reconnecting the gate
board, remove the shorting material. Do not touch device pins with fingers. Refer to the following
picture while testing an IGBT device.
Figure 4A.2 High and Low Impedance
CAUTION !