07-02-12-02-EN-V1215.doc / Type: 638
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5 Electrical Installation
5.1 Installation General
● Safety
The voltages carried by power supply cables, motor cables, connectors, and certain parts of the
drive can cause serious electric shock and even death
● Danger of Electric Shock
Caution !
Risk of electrical shock, wait 3 minutes after switching off, for discharging of the capacitors.
Disconnect the drive unit from the mains before working on it. A period of three minutes must
pass after switching off so that the internal capacitors can discharge completely. Until the discharge
time is over, there can be dangerous voltage stored in the module !
Persons, who monitor or carry out electrical installation and maintenance must be adequately
qualified and schooled in these activities.
● Dangerous Areas
The use of variable speed drives of all kinds can invalidate the certification for dangerous areas
(apparatus group and/or temperature class) of explosion-protected motors. Inspection and
certification for the complete installation of servo motors and electronic components must be
obtained.
● Grounding - Safety Grounding
The grounding impedance must meet the requirements of local industrial safety regulations and
should be inspected and checked at appropriate and regular intervals
● Ground Connections
It is recommended to attach a ground bus, made of high conductivity copper, as near as possible to
the servo-rack or regulator modules in order to minimize the length of the cable run connections.
The recommended dimensions are:
Thickness: d = 5 to 6 mm
Length
(m)
Width
(mm)
b
grounding bus-bar
d
< 0,5 20
0,5 < 1,0 40
1,0 < 1,5 50
Due to increased discharge currents > DC 10mA resp. > AC 3,5mA the grounding connection of
the drive has to be connected 2 times. At power supply connector X60.7 and at the housing
grounding screw!
● Short-Circuit Capacity and Discharge Currents
Due to the working principles of servo drives, there may discharge currents to the ground
exceeding DC 10mA resp. AC 3,5mA.
Suitable for use in a system capable of delivering not more than 5000 RMS symmetrical
amperes 240V (638A) or 480V (638B) maximum. (Note according to UL508C)
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