Elmo Rietschle G-BH7 Operating instructions - Manual (Page 17)

Installation
© Gardner Denver Deutschland GmbH 17 / 28 610.44436.40.000
 For the tightening torques for terminal board
connections (except terminal strips), see
Chapter 3.1, "Mechanical data",
Section "Tightening torques for screw
connections", Pg. 10.
 For terminals with clamping straps (e.g. as per
DIN 46282), the conductors must be inserted
so that approximately the same clamping
height results on both sides of the bar.
Individual conductors must therefore be bent
into a U-shape or connected with a cable lug
(DIN 46234).
This also applies to:
 the protective conductor,
 the outer ground conductor.
Both conductors can be recognized from their
color (green/yellow).
 DANGER
Electrical danger!
The terminal box must be free from
 foreign bodies,
 dirt,
 humidity.
Terminal box cover and cable entries must be
tightly closed so as to make them dustproof and
waterproof. Check for tightness at regular
intervals.
 DANGER
Electrical danger!
Clearance between bare live parts and between
bare live parts and ground:
at least 5.5 mm (at a nominal voltage of
U
N
≤ 690V).
There may be no protruding wire ends!
For motor overload protection:
 Use motor circuit breakers.
 This must be adjusted to the specified
nominal current (see rating plate).
 DANGER
Electrical danger!
There is danger of an electrical shock when a
defective pump-motor unit is touched!
Mount motor circuit breaker.
Have electrical equipment checked regularly by
an electrician.
Interference immunity of drive motor:
For drive motors with integrated sensors, the
operator must provide for a sufficient interference
immunity itself. Select a suitable sensor signal
cable (e.g. with screening, connection as for a
motor power-supply cable) and analyzing unit.
Operation with frequency converter:
With a power supply by external frequency
converters, the following must be observed:
 High-frequency current and voltage harmonics
in the motor supply cables can lead to emitted
electromagnetic interference. This is
dependent on the converter design (model,
manufacturer, interference suppression
measures).
 Be sure to observe the EMC notes of the
converter manufacturer!
 Use screened power supply cables if
necessary. For optimal screening, the screen
must be conductively connected over a large
area to the metal terminal box of the drive
motor with a screwed metal gland.
 In the case of drive motors with integrated
sensors (e.g. PTC thermistors) interference
voltage can occur on the sensor cable
depending on the converter model.
 Limit speed:
see specifications on the rating plate.
 WARNING
Pump-motor units with a UL approbation may
not be operated on frequency converters in the
US without testing by a suitable test agency!