38 Mentor MP Short Form Guide
www.controltechniques.com Issue Number: 5
4.3.1 Supply types
Drives rated for supply voltages up to 575 V (rated up to 210 A) and 600 V (350 A and
above) are suitable for use with any supply type, i.e. TN-S, TN-C-S, TT, IT, with
grounding at any potential, i.e. neutral, centre or corner ("Grounded-delta").
Grounded delta supplies >575 V are not permitted for drives rated up to and including
210A. Grounded delta supplies >600 V are not permitted for drives rated 350 A and
above.
4.3.2 Supply fault current
The maximum fault current level of the supply to all circuits is 100 kA subject to the
capability of the semiconductor fuse fitted.
4.3.3 Main AC supply (L1, L2, L3)
Table 4-1 Three phase AC supply
4.4 Line reactors
The Mentor MP, in common with all naturally commutated thyristor drives, causes
voltage notches at the input supply terminals. In order to avoid disturbance to other
equipment using the same supply, the addition of external line inductance is strongly
recommended in order to restrict the depth of the notches imposed on the shared
supply. This is generally not necessary where a dedicated transformer is used to supply
the drive.
The following recommendations for added line inductance, have been calculated based
on the power drive systems standard: EN 61800-3:2004 “Adjustable speed electrical
power drive systems – Part 3: EMC requirements and specific test methods”.
Grounded delta supplies exceeding 575 V are not permitted for drives rated up to and
including 210 A. Grounded delta supplies exceeding 600 V are not permitted for drives
rated 350 A and above.
Specification
Product voltage variant
480V 575V 690V
Maximum nominal supply 480V 575V 690V
Tolerance +10%
Minimum nominal supply 24V 500V
Tolerance -20% -10%
The current ratings specified in Table 4-2 are for typical motor currents where the
motor current ripple is no more than 50% of drive rating.
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