SSD 605C Product Manual - page 35
Installing the Inverter
3-13
605C Frequency Inverter
The completed filter assembly provides IP4x rating from above and below, the remaining
surfaces are IP2x.
• CO465188U020
External AC Supply EMC Filter:
back mounting - 4 x M6
earth terminals - M5 stud
mass - 1.2kg
BA465189U020
Gland Box Kit (both ends supplied):
conduit hole diameter - 28.6mm (gland box base)
• CO465188U036
External AC Supply EMC Filter:
back mounting - 4 x M7
earth terminals - M6 stud
mass - 2.7kg
BA465189U036
Gland Box Kit (both ends supplied):
conduit hole diameter - 28.6mm (gland box base)
Follow the cabling requirements given in Chapter 11: “Technical Specifications”
EMC Motor Output Filter
This can help the Inverter achieve EMC and filter thermal conformance with cable lengths
greater than those specified. It also ensures longer motor life by reducing the high voltage slew
rate and overvoltage stresses. Mount the filter as close to the VSD as possible. Please refer to
SSD Drives for the selection of a suitable filter.
Output Contactors
Output contactors can be used, although we recommend that this type of operation is limited to
emergency use only, or in a system where the inverter can be inhibited before closing or
opening this contactor.
Earth Fault Monitoring Systems
We do not recommend the use of circuit breakers (e.g. RCD, ELCB, GFCI), but where their use
is mandatory, they should:
• Operate correctly with dc and ac protective earth currents (i.e. type B RCDs as in
Amendment 2 of IEC755).
• Have adjustable trip amplitude and time characteristics to prevent nuisance tripping on
switch-on.
When the ac supply is switched on, a pulse of current flows to earth to charge the
internal/external ac supply EMC filter’s internal capacitors which are connected between phase
and earth. This has been minimised in SSD Drives’ filters, but may still trip out any circuit
breaker in the earth system. In addition, high frequency and dc components of earth leakage
currents will flow under normal operating conditions. Under certain fault conditions larger dc
protective earth currents may flow. The protective function of some circuit breakers cannot be
guaranteed under such operating conditions.
WARNING!
Circuit breakers used with VSDs and other similar equipment are not suitable for
personnel protection. Use another means to provide personal safety. Refer to
EN50178 (1997) / VDE0160 (1994) / EN60204-1 (1994)