Lorentz PSk3-7 User Manual

Controller Installation 4746 Controller Installation
EN EN
Figure 14: Controller grounding
grounding rod
grounding
Cable
7.4.2 .7 Further considerations
As AC source and solar are coupled galvanically to
each other it is important to always disconnect both
sources if installation or maintenance has to be done
on either the AC or DC side.
If you are working on the AC power lines, take care
that the DC power lines are disconnected. If you
are working on the DC power lines, the AC power
lines need to be disconnected for safety reasons.
It is recommended to attach a warning to your
installation components, e.g. to an installed PV
Disconnect.
During nighttime it is possible that voltage is present
on the solar array. This voltage is parasitically
induced if controller is connected to AC during
nighttime.
l
WARNING – Beware of dangerous
voltage on the PV array, even at night!
7.5 Grounding
7.5.1 Why grounding is required
Grounding is mandatory to protect the users from
potentially fatal electric shocks. It also protects
against electric charging or a short circuit inside
the device. This is accomplished through clamping,
bolting or other mechanical means to provide an
eective 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.
7.5.2 How to ground
A protective earth connection for the controller
must be connected to the grounding bolt. The right
PE terminal, next to the motor phases (U, V, W), is for
the protective earth wire of the motor.
7.5.3 Insucient ground source
Where there is an inadequate ground source you
can use a grounding rod. A grounding prole rod
should be located about 4 – 5m (13 – 16 ft) maximum
from the controller. The cable must not carry any
mechanical loads. The rod must be completely
buried in the ground (0.5 m / 1.5 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).

Lorentz PSk3-7 Specifications

General

Brand	Lorentz
Model	PSk3-7
Category	Inverter
Language	English