7.7.1.6 Grounding
Before starting to work on the electrical system make sure
that all components are disconnected from the power
source. Only switch on the system when you have finished
all work.
Grounding is mandatory to protect the users from potential-
ly fatal electric shocks. It also protects against electric charg-
ing or a short circuit inside the device. This is accomplished
through clamping, bolting or other mechanical means to
provide an effective grounding path to the earth to ensure
safe operation at all time.
The grounding is also important to the system for lightning
protection. In general it is meant for indirect lightning strikes
and induced electrical potentials during operation of the
pump system.
Before installation, contact the local code authorities to
determine the necessary grounding requirements.
Insufficient ground source: Where there is an
inadequate ground source you can use a grounding rod.
A grounding profile rod should be located about 4 – 5m
(13 – 16 ft) from the controller. The cable must not carry any
mechanical loads. The rod must be completely buried in
the ground (2.5 m/8 ft below ground level). You must refer
to local standards and requirements. The grounding cable
should be a copper cable with a cross section of not less
than 16 mm
2
(AWG 6).
PS150 to PS200 (non UL): A protective earth connection
must be linked to the controllers earth connector, marked
with the protective earthing symbol . The protective earth
wire of the motor must also be connected to the controllers
earth connector.
PS150-UL, PS200-UL and PS600 to PS4000: A protec-
tive earth connection for the controller must be connected
to the left GND terminal. The right GND terminal, next to the
motor phases (L1, L2, L3), is for the protective earth wire of
the motor.
All metallic support structures and electrical enclosures must
be grounded.
For grounding of the PV generator, follow manufacturer
instructions.
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