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2 Safety
2.1.2 General Warning
Leakage Current
The earth leakage current from the Automation VT Drive FC322 exceeds 3.5 mA. According to IEC 61800-5-1 a reinforced Protective
Earth connection must be ensured by means of: a min. 10mm² Cu or 16mm² Al PE-wire or an addtional PE wire - with the same cable
2
cross section as the Mains wiring - must be terminated separately.
Residual Current Device
This product can cause a D.C. current in the protective conductor. Where a residual current device (RCD) is used for extra protection,
only an RCD of Type B (time delayed) shall be used on the supply side of this product. See also RCD Application Note MN.90.GX.02.
Protective earthing of the Automation VT Drive FC322 and the use of RCD's must always follow national and local regulations.
2.1.3 Before Commencing Repair Work
1.
Disconnect the frequency converter from mains
2.
Disconnect DC bus terminals 88 and 89
3.
Wait at least the time mentioned in section General Warning above
4.
Remove motor cable
2.1.4 Special Conditions
Electrical ratings:
The rating indicated on the nameplate of the frequency converter is based on a typical 3-phase mains power supply, within the specified voltage, current
and temperature range, which is expected to be used in most applications.
The frequency converters also support other special applications, which affect the electrical ratings of the frequency converter. Special
conditions which affect the electrical ratings might be:
•
Single phase applications
•
High temperature applications which require derating of the electrical ratings
•
Marine applications with more severe environmental conditions.
Consult the relevant clauses in these instructions and in the Automation VT Drive Design Guide for information about the electrical ratings.
Installation requirements:
The overall electrical safety of the frequency converter requires special installation considerations regarding:
•
Fuses and circuit breakers for over-current and short-circuit protection
•
Selection of power cables (mains, motor, brake, loadsharing and relay)
•
Grid configuration (IT,TN, grounded leg, etc.)
•
Safety of low-voltage ports (PELV conditions).
Consult the relevant clauses in these instructions and in the Automation VT Drive Design Guide for information about the installation requirements.
2.1.5 Caution
The frequency converter DC link capacitors remain charged after power has been disconnected. To avoid an electrical shock hazard,
disconnect the frequency converter from the mains before carrying out maintenance. Wait at least as follows before doing service on
the frequency converter:
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MG.20.U1.22
Automation VT Drive FC322
Instruction Manual
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