Guidelines - Beckhoff AX8000 Series Operating Instructions Manual

Guidelines and Standards

Guidelines

14.2
Electrical isolation
14.2.1
88 ───
2014/35/EU
Low Voltage Directive
2011/65/EU
RoHS Directive
2014/30/EU
EMC Directive
Installation with protective conductor connection
When installing electrical systems and components, the protective
conductors must be connected first. They must be disconnected
last when uninstalling.
Depending on the magnitude of the leakage currents, observe the
following regulations for the implementation of the protective con-
ductor connection:
• Minimum requirement for protective conductor: KU value of 4.5
• Minimum requirement for leakage currents: I
for I > 10 mA
L
Value Explanation
KU Variable for the classification of safety-related types of
failure for protection against dangerous shock current
and excessive heating
KU = 4.5 Achieved in relation to interruption:
With permanently connected protective conductor con-
nection
2
≥ 1.5 mm
With a protective conductor connection of ≥ 2.5 mm
a plug connector for industrial plants according to IEC
60309-2
KU = 6 Achieved in relation to interruption:
With permanently connected conductors ≥ 10 mm
of connection and laying must conform to the applicable
standards for PE cables
The power section, consisting of motor connection, DC link connec-
tion and mains connection, as well as the control unit are to be dou-
ble-insulated against each other. This guarantees secure shock pro-
tection on all terminals in the control unit, even without further mea-
sures. The air gaps and creepage distances conform to EN 50178 /
VDE 0160.
AX8000
< 10 mA; KU = 6
L
2
via
2
; type
Version: 1.1