User manual
AMD2000 Series - Servo Drive - User Manual
38 DS619-0-00-0019 - Rev 0 ANCA Motion
6.3.15 Residual current-operated protective (RCD) protection
Residual current-operated protective devices (RCD) provide additional protection for detection of insulation faults
where current is no longer contained in power conductors.
It is only permissible to use delayed tripping, selective AC/DC-sensitive residual-current circuit-
breakers, Type B.
Parts of the electrical equipment and machine that can be touched are integrated in a
protective grounding system.
If an external EMC filter is used, a delay of at least 50ms should be incorporated to ensure
spurious trips are not seen.
The leakage current is likely to exceed the trip level if all of the phases are not energized
simultaneously.
With IT mains supply systems, RCDs are subject to nuisance tripping from drive common
mode capacitors
6.4 Grounding
A grounding system has three primary functions: safety, voltage-reference, and shielding. The safety function is
required by local regulations and is designated as the Protective Earth. Signal and control circuits are typically
grounded at various points with the ground forming the common voltage reference. Shields on cables reduce
emissions from the drive for CE compliance and protect internal circuits from interference due to external sources
of electrical noise.
The Protective Earth (PE) Connection from the mains supply eliminates shock hazards by keeping parts at earth
potential. The PE also conducts fault currents to earth ground until the safety device (fuse or circuit breakers)
disconnects the drive from the mains.
Symbol for Protective Earth (PE)
The mains supply protective (PE) cable must have a cross sectional area equal to 10mm
2
due to the drive
leakage current. The mains PE is connected to M4 screw terminal at either end of the drive heat sink.
Heatsink
PE connection
with M4 bolt
The protective earth conductor
In multiple drive installations, each drive must be individually wired to a common PE point. Do not daisy chain PE
connections from one drive to the next.
The AMD2000 drive is designed to be installed on an unpainted metal gear tray e.g. galvanized surface which
forms an equipotential bond to all equipment mounted on the same gear tray. This minimizes voltage differences
to all grounded connections and enhances the immunity of equipment against conducted and radiated RF
disturbance. The gear tray must be connected to the supply PE, and is designated the Chassis Earth.
Symbol for Chassis Earth
6.5 Input EMC (Electromagnetic Compatibility)
EMC stands for Electromagnetic compatibility. It is the ability of electrical/electronic equipment to operate without
problems within an electromagnetic environment. Likewise, the equipment must not disturb or interfere with any
other product or system within its locality. Variable speed drives are a source of interference, and all parts which
are in electrical or airborne connection within the power drive system (PDS) are part of the EMC compliance.
The drive interference is generated from the output voltage waveform which is a rapidly changing voltage
waveform (Pulse Width Modulation). The voltage transitions present on all motor cables and motor windings