Installation
4-14
L
MA9300PLC EN 1.4
Fuses
Fuses and cable cross-sections The specifications in Chapter 3.4.4 are recommendations and refer to the use
• in control cabinets and machines
• installation in the cable duct
• max. ambient temperature +40 °C.
^ 3-7
Selection of cable cross-section Consider the voltage drop (according to DIN 18015 part 1: ≤ 3%).
Protection of cables and controller on the AC
side (L1, L2, L3)
• By standard commercial fuses.
• Fuses in UL-conform plant must have UL approval.
• The rated voltages of the fuses must be dimensioned according to the
mains voltage at the site. The activation characteristic is defined by ”H” or
”K5”.
Protection of cables and controller on the DC
side (+ UG, -UG)
• By means of recommended DC fuses.
• The fuses/fuse holders recommended by Lenze are all UL approved.
For DC bus connection or supply by means of a
DC source
Please observe the notes in Part F of the Systems Manual.
Connection of a brake unit If a brake unit is connected to the terminals + UG / -UG, the fuses and cross-
sections listed in Chapter 3.4.4 do not apply. These unit-specific data can be
obtained from the technical documentation of the brake unit.
Further information For the protection of cables and the controller please see the chapter ”Acces-
sories” under “Planning”.
Other standards The compliance with other standards (e.g.: VDE 0113, VDE 0289, etc.)
remains the responsibility of the user.
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