Electrical Installation; Safety; The Danger Of Electric Shocks; Danger Areas - Eurotherm 637+/D6R KD6R Product Manual

5

Electrical installation

5.1

Safety

The voltages carried by power supply cables, motor cables, connectors, and certain parts of the drive can
cause serious electric shocks and even death
5.2

The danger of electric shocks

CAUTION !
Risk of electrical shock, wait 3 minutes after switching off, for discharging the capacitors.
Disconnect Eurotherm plug-in units from mains before working on them. 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 voltages in the
module !
Persons, which monitoring or carrying out electrical installation and maintenance must be adequately
qualified and schooled in these activities.
5.3

Danger 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.
5.4

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

5.4.1 Ground connections

It is recommended to attach a ground bus of high conductivity copper as near as possible to the servo-rack or
regulator modules in order to minimize the length of the cable connections.
The recommended dimensions are:
Thickness: d = 5 to 6 mm
Length
(m)
< 0,5
0,5 < 1,0
1,0 < 1,5
Ways of raised discharge currents > DC 10mA resp. > AC 3,5mA the PE-Bolt of the drive has to be
connected to PE using copper-cable minimum 10mm² !
5.5

Short-circuit capability and discharge currents

Due to the working-principle of servo drives there may discharge currents to
PE exceeding DC 10mA resp. AC 3,5mA.
Suitable for use on a circuit capable of delivery not more than 5000 RMS symmetrical
amperes 505V maximum. (Note according to UL508C)
Electrical installation
48
Width d
(mm)
20
b
40
50
Product-manual Model: 637+/D6R KD6R
grounding bus-bar
l
07-02-09-01-E-V0402.doc