5 Electrical installation
5.1 Safety precautions
Danger owing to electric current
•
Work on electric components may only be carried out by trained electricians or by
persons instructed in electricity under the supervision of an electrician in accordance
with electrical engineering regulations.
•
It is forbidden to carry out work on electrically live parts. Even after disconnection, the dc-
link is still live. Always wait at least 3 minutes.
•
A second person must always be present when working on energized parts or lines who
disconnects in case of emergency.
•
Inspect electrical equipment periodically: retighten loose connections
–
immediately
replace damaged lines and cables.
•
Always keep switch cabinets and all electrical supply facilities locked. Access is only
allowed for authorized persons using a key or special tool.
•
Operating the device with the housing cover removed is prohibited because energized,
exposed parts are present inside the device. Disregarding this regulation can lead to
severe personal injury.
•
The required protective earth connection is established using screws between the
housing parts in metal terminal space covers and housing casings. Commissioning is
only permissible after these screws have been properly attached!
•
Metal screwed-connections are not permitted in plastic housing parts because there is no
potential equalization.
•
Never clean electrical equipment with water or similar liquids.
Information
The respective connections are represented in the enclosure of this manual (
F
Connection diagram)!
5.2 EMC-compatible installation
5.2.1
Interference emission and installation of cables
In order to prevent faults attributable to interference and to ensure compliance with the radio interfer-
ence level, the connecting leads must be kept as short as possible both in the motor terminal box as
well as in the controller. Spacing between supply cables, motor cable and signal cable should thereby
be kept as large as possible.
The so-called
“
pig-tails
”
of the screen are to be avoided when connecting screened cables. The
screen shall be laid close up to the terminals and taken from here to the protective conductor
connection by the shortest possible route, laid
at (low induction) and without loops.
When installing the controller in a switching cabinet, attention shall be paid that
“
live
”
(interference)
cables and interference-suppressed cables are not routed in the duct.
5.2.2
Motor feeder cable
The screening of the motor cables (U1, V1, W1, PE) must be two-fold (both ends), i.e. connected to
the protective conductor at the controller and at the motor.
The use of a screened motor cable of max. 10 m in length will ensure compliance with the limiting
value class B in accordance with EN 5501.
5.2.3
Cables for hall sensors and thermostats
The screening of the control cables for the hall sensors (+15 V, GND, H1, H2, H3) and the thermostats
(TB, TB) may only be connected to the protective conductor at one end at the controller; use shielded
clamp or connection for protective ground for this.
The control cable for the Hall sensors shall be connected to the screen terminal of the motor terminal
box.
Information
Supply cables for the hall sensors and thermostats may not be routed in the same cable harness as
the motor cables because of coupling unbalances.
Operating Instruction
Econtrol
–
model series EXDM
Electrical installation
L-BAL-E008-GB 0945 Index 005
Part.-No. 00156742-GB
11/85
