BECKHOFF Drive Technology 3 Guidelines and Standards
AX5000 Version 6.2 15
Three-phase
*) UL-Mains fuses must be used.
For alternatives regarding class RK5 UL-fuses, you must observe “UL508 A, chapter
SB4.2.3, exception no. 1”. For further questions regarding UL-fuses, please contact your
responsible certification authority.
SB4.2.3 A high fault short circuit current value for a motor controller, overload relay, or
combined motor controller, as specified in SB4.2.2 (a) or (c), may be used as the component
short circuit current value only if the specified branch circuit protection device is provided.
Exception 1: Where the specified BCPD is a Class CC, G, J, L, RK1, RK5, or T fuse with
respect to the high fault SCCR, a fuse of a different class may be used at the same high
fault rating, provided the Ip let-through current and I2t of the new fuse are not greater than
that of the specified fuse. See Table SB4.2 for maximum let-through currents (Ip) and I2t.
3.3.3 UL-specific notes
Use in a Pollution Degree 2 environment
Use 75 °C Copper Conductors min.
Control Board rating = 24 V
Drive does not provide motor overtemperature protection.
Drive intended for use over a range of motor sizes. Internal motor overload protection level
is adjustable (see “AX5000 function description Thermal motor model”).
In Canada use only in combination with unit AX2090-TS50, manufactured
3.4 Electrical isolation according to EN 50178 / VDE 160
The power section (motor connection, DC link connection and mains connection) and the
control unit are doubly insulated against each other, so that safe protection against
accidental contact is ensured at all terminals of the control unit without additional measures.
The air and creepage distances also meet the requirements of the above standard.
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