Lorentz PV Disconnect 400-50-1-S Specification sheet

The Solar Water Pumping Company
PV Disconnect 400-50-1/3/6-S
Connection Box with DC Disconnect Switch and
Surge Protection Device
Manual for Installation and Operation
Photo may dier from actual product
EN

Siebenstuecken 24, 24558 Henstedt-Ulzburg
Germany, Tel. [phone], Fax -708
BERNT LORENTZ GmbH
55 x 25 mm
2 Introduction 3
EN
2 Content Introduction 3
EN
1 Introduction
Thank you for purchasing a LORENTZ product.
Before you begin - Check the product label to verify
that this is the item that you ordered. Also check
the product specications to be sure the product is
appropriate for your application.
Read the manuals of pump end, controller and other
components used in your system.
2 Storage and Handling
This LORENTZ product is supplied from the
factory in proper packing in which it should
remain until it is to be installed.
Handle the product with care and avoid
unnecessary impacts and shocks.
Prolonged intermediate storage in an
environment of high humidity and uctuating
temperatures must be avoided. Moisture
condensation may damage metal parts.
Non-compliance will void any warranty. It is
recommended storing the parts in a closed and
dry room.
The product can be stored in the range of –30 °C
to 50 °C (-22 °F to 120 °F). The product should not
be exposed to direct sunlight.
3 Ambient Conditions
The permitted ambient temperatures for use are:
-30°C to 50˚C (-22 °F to 120 °F).
Humidity and air salinity:
The product must not be operated where day
average humidity is above 80% or in saline air with
more than 2μg/m³.
4 Declaration of Conformity
We, BERNT LORENTZ GMBH, declare under our sole
responsibility that the products:
PV Disconnect 400-50-1-S
PV Disconnect 400-50-3-S
PV Disconnect 400-50-6-S
to which the declaration relates, are in conformity
with the Council Directives on the approximation of
the laws of the EC Member States relating to:
Machinery Directive (2006/42/EC)
 Low Voltage Directive (2014/35/EU)
References of harmonized standards and/or other
technical specications applied:
 EN 60204-1:2006+A1:2009
 EN 60947-3:2009+A1:2012
Bernt Lorentz, CEO
Person authorized to compile the technical le
and empowered to sign the EC/EU declaration of
conformity.
Henstedt-Ulzburg, Germany, 1st March 2021.
STANDARDS
Meets the requirements for CE
Table of Content
1 Introduction .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .3
2 Storage and Handling .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .3
3 Ambient Conditions.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .3
4 Declaration of Conformity .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 3
5 Safety Instructions .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .4
6 Scope of delivery .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .5
7 Product Description.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .6
7.1 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
7.2 Further related LORENTZ products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
7.2.1 PV Combiner 1000-15-3-F (Item No. 19-001940) and PV Combiner 1000-15-6-F (Item No. 19-001945) 7
8 PV Wiring diagram for PS2 pump systems.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .8
9 Installation.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .9
9.1 Mounting & Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
9.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
9.2.1 General 10
9.2.2 Connecting the DC Input Cables 11
9.2.3 Wiring Connection 12
9.2.4 Grounding 14
10 Troubleshooting. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 16

4 Safety Instructions Scope of delivery 5
EN EN
General safety directions for the operator/user
– If hot or cold equipment parts pose a danger
then they must be protected by the operator/user
against contact with people. Protective covers
for energized parts (e.g. terminal clamps) must
not be removed when the equipment is running.
All government and local regulations must be
observed at all times. Any danger to persons
from electrical energy must be excluded by using
good installation practices and working to local
regulations. (For example VDE in Germany).
Safety directions for maintenance, inspection
and assembly work – It is the user’s responsibility
to make sure that all maintenance, inspection
and assembly work is performed exclusively by
authorized and qualied experts suciently
informed through careful perusal of the Operating
Instructions. The accident prevention regulations
must be observed. All work on the equipment
should be done when it is not operational and
ideally electrically isolated. Immediately upon
completion of the work, all safety and protective
equipment must be restored and activated.
Unauthorized changes and manufacturing
of spare parts – Any conversion or changes of
the equipment may only be undertaken after
consulting the manufacturer. Original spare parts
and accessories authorized by the manufacturer
guarantee operational safety. Using non-
authorized parts may void any liability on the part
of the manufacturer.
Unauthorized operation – The operational safety
of the equipment delivered is only guaranteed
if the equipment is used in accordance with the
directions contained in this manual. Limits stated
in the data sheets may not be exceeded under any
circumstances.
Cited standards and other documentations –
DIN 4844 Part 1 Safety marking; Safety symbols
W 8, Supplement 13; DIN 4844 Part 1 Safety
marking; Safety symbols W 9, Supplement 14.
RETAIN THESE INSTRUCTIONS
FOR FUTURE USE!
6 Scope of delivery
Depending on the reference, the scope of delivery
will be as specied below:
Table 1: Delivery list for PV Disconnect of max. 1
String:
Item Description Quantity
1PV Disconnect 400-50-1-S 1 unit
2Manual 1 unit
Table 2: Delivery list for PV Disconnect of max. 3
Strings:
Item Description Quantity
1PV Disconnect 400-50-3-S 1 unit
2Manual 1 unit
Table 3: Delivery list for PV Disconnect of max. 6
Strings:
Item Description Quantity
1PV Disconnect 400-50-6-S 1 unit
2Manual 1 unit
5 Safety Instructions
Safe operation of this product depends on its
correct transportation, installation, operation and
maintenance. Failure to follow these instructions can
be dangerous and/or void the warranty.
READ AND
FOLLOW ALL
INSTRUCTIONS!
Explanation of Warning Symbols
l WARNING – Disregard might lead to
injury or damage to the installation.
a CAUTION – Recommended to avoid
dysfunction or premature ageing of the
equipment etc.
When installing and using this electrical equipment,
basic safety precautions should always be followed,
including the following:
l WARNING – To reduce the risk of
injury, do not permit children to use this
product.
l WARNING – To reduce the risk of
electric shock, replace damaged cords
and cabling immediately.
l WARNING – It must be assured that
all grounding connections are properly
made and that the resistances meet local
codes or requirements.
The manual contains basic instructions which
must be observed during installation, operation
and maintenance. The manual should be
carefully read before installation and start-up
by the person in charge of the installation. The
manual should also be read by all other technical
personnel/ operators and should be available at
the installation site at all times.
Personnel qualication and training – All
personnel for the operation, maintenance,
inspection and installation must be fully qualied
to perform that type of job. Responsibility,
competence and the supervision of such
personnel must be strictly regulated by the user.
Should the available personnel be lacking the
necessary qualication, they must be trained and
instructed accordingly. If necessary, the operator
may require the manufacturer/supplier to
provide such training. Furthermore the operator/
user must make sure that the personnel fully
understand the contents of the manual.
Dangers of ignoring the safety symbols –
Ignoring the safety directions and symbols
may pose a danger to humans as well as to the
environment and the equipment itself. Non-
observance may void any warranties. Non-
observance of safety directions and symbols
may for example entail the following: Failure of
important functions of the equipment/plant;
failure of prescribed methods for maintenance
and repair; endangerment of persons through
electrical, mechanical and chemical eects;
danger to the environment because of leakage
of hazardous material; danger of damage to
equipment and buildings.
Safety-oriented operation – The safety directions
contained in the manual, existing national
regulations for the prevention of accidents as well
as internal guidelines and safety-regulations for
the operator and user must be observed at all
times.

-
Out
-
In
+
In
+
Out
-
Out
-
In
+
In
+
Out
6 Product Description Product Description 7
EN EN
7.2 Further related LORENTZ products
Some installations may require additional
accessories to connect the PV wiring of the system
in a proper way; in the "Figure 4: Example of PV
wiring diagram for the PV Disconnect 400-50-1-S
using a PV Combiner 1000-15-6-F." on page 8;
you will nd a graphical explanation of one scenario
where these accessories are included. Below is a
brief description of these, please consider them
depending on the system to be installed.
7.2.1 PV Combiner 1000-15-3-F (Item No. 19-001940)
and PV Combiner 1000-15-6-F (Item No. 19-001945)
The LORENTZ PV Combiner 1000-15-3-F and 1000-
15-6-F are PV connection boxes with fuses to be
used optionally with our PS2 and PSk pump systems
to protect the system against short-circuits in the PV
eld. The product can combine up to three (1000-15-
3-F) or six (1000-15-6-F) DC inputs in parallel coming
from solar arrays.
For more information, please refer to the manual of
the PV Combiner 1000-15-3/6-F.
For optimal protection of the PS2/PSk controller, it is
advisable to protect the strings with fuses to prevent
a short circuit coming from PV array. In this case, the
PV Combiner 1000-15-3-F or PV Combiner 1000-15-
6-F must be used so that the PV Disconnect switch
can operate within its specications.
Note: If the optional PV Combiner with fuses is
used, a PV Disconnect 400-50-1-S is required.
7 Product Description
The LORENTZ PV Disconnects 400-50-1-S, 400-50-
3-S and 400-50-6-S are PV connection boxes with
an integrated DC disconnect switch, a combining
function and additionally are equipped with a Surge
Protection Device (SPD). The SPD will provide an
increased level of protection from electrical surges
(for example caused by indirect lightning strikes). For
operation it requires a reliable ground connection.
The box is designed to connect PV Module string(s)
with the pump controller by using the terminal
clamps located inside the box. The DC-rated
disconnect switch is used as a manual isolation
switch between the solar array and the pump
system. This switch is easily accessible by opening
the hinged lid at the bottom spring lock(s).
The wiring instructions of the PV Disconnects 400-
50-1-S, 400-50-3-S and 400-50-6-S can be found in
section "9.2.3 Wiring Connection", see Figure 13
and Figure 14 on page 13 and Figure 15 on page
14.
The switch must be installed between the solar
generator and the pump controller. It must meet the
electrical requirements of the connected devices.
The PV Disconnects 400-50-1-S, 400-50-3-S and
400-50-6-S have been designed to cover the range of
PS2 pump systems PS2-150 to PS2-4000.
l WARNING - The use of a properly
sized DC disconnect switch is an
important safety measure and obligatory
for a professional installation of a solar
pumping system.
7.1 Technical Data
DC rated disconnect switch enclosed
Enclosure class IP 68
Table 4: Technical data of LORENTZ PV Disconnect
400-50-1/3/6-S:
Technical
Data 400-50-1-S 400-50-3-S 400-50-6-S
Max.
voltage 400 V DC 400 V DC 400 V DC
Max.
current
per string
50 A 50 A 50 A
Max.
total
current
50 A 50 A 50 A
Max. no.
of strings 1 3 6
Input
cable size
2.5 - 10 mm²
[AWG 14 - 8]
2.5 - 10 mm²
[AWG 14 - 8]
2.5 - 10 mm²
[AWG 14 - 8]
Output
cable size
4 -10 mm²
[AWG 12 - 8]
4 -10 mm²
[AWG 12 - 8]
4 -10 mm²
[AWG 12 - 8]
Figure 1: Wiring terminals of the PV Combiner 1000-
15-3-F:
Figure 2: Wiring terminals of the PV Combiner 1000-
15-6-F:

197
187
218
139
197
187
218
139
1
2
4
3
5
6
PV Disconnect
400-50-1-S
PV Combiner
1000-15-6-F
PV Disconnect
400-50-6-S
1
2
4
3
5
6
8 PV Wiring diagram for PS2 pump systems Installation 9
EN EN
8 PV Wiring diagram for PS2
pump systems
Figure 3: Example of PV wiring diagram for the PV
Disconnect 400-50-6-S:
"Installation where Fuses are not required"
PV Strings
PS2 Controller
Note: If the installation is carried out without
fuses, a PV Disconnect is required according to the
number of strings.
Figure 4: Example of PV wiring diagram for the PV
Disconnect 400-50-1-S using a PV Combiner 1000-
15-6-F.
"Installation where Fuses are required"
PV Strings
PS2 Controller
9 Installation
9.1 Mounting & Dimensions
l WARNING – All electrical connections
should be performed by qualied experts
only!
The PV Disconnects 400-50-1-S, 400-50-3-S and 400-
50-6-S must be mounted vertically to a wall or a pole
using appropriate xings.
Table 5: Mounting hole distances (Width x Height,
Hole Diameter):
Product Dimension
PV Disconnect 400-50-1-S 160 x 150, Ø6 mm
[6.3 x 5.9, Ø0.236 in]
PV Disconnect 400-50-3-S
PV Disconnect 400-50-6-S
270 x 150, Ø6 mm
[10.6 x 5.9, Ø0.236 in]
For optimal resistance against water ingress the
cable glands must point downwards and must be
tightened properly.
a CAUTION – Make sure the housing is
not distorted after mounting; otherwise
the lid may not close properly. Mount it to
an even surface / xed on a at vertical
surface.
Figure 5: PV Disconnect 400-50-1-S (Front view):
Figure 6: PV Disconnect 400-50-1-S (Bottom view):
Cable glands input
(2x M16)
Cable glands output
(2x PG-11)
Cable gland GND
(1x M16)

5 6
D
307
 8
217
187
139
139
307
216
187
139
307
216
187
10 Installation Installation 11
EN EN
Figure 7: PV Disconnect 400-50-3-S and 400-50-6-S
(Front view):
Figure 8: PV Disconnect 400-50-3-S (Bottom view):
Cable gland GND
(1x M16)
Cable glands input
(6x M16)
Cable glands output
(2x PG-11)
Figure 9: PV Disconnect 400-50-6-S (Bottom view):
Cable gland GND
(1x M16)
Cable glands
input
(12x M16)
Cable glands output
(2x PG-11)
9.2 Wiring
9.2.1 General
Before starting to work on the electrical system
make sure that all components are disconnected
from the power source. Make sure each PV Module
string is disconnected at some point so that no
voltage is present during wiring of the system. Only
reconnect the PV Strings and switch on the system
when all work is nished.
a CAUTION – Loose connections are the
most common cause of system failures.
Pull each wire connection SLIGHTLY to
conrm that it is tightened securely.
Make sure that the cable glands are tightened and
that the cables t the clamping range of the cable
gland to ensure a proper seal. If necessary use some
additional sealing material (e.g. silicone).
Solar-direct systems use a variety of array
congurations. PV Modules can be connected in
series and also in parallel. Refer to the System
Wiring Diagram which is provided by COMPASS and
to the module manufacturer’s instructions. Make
good connections that will last for many years. Most
system failures are caused by loose, corroded or
shorted connections.
l WARNING – SOLAR-DIRECT systems
only - do not connect any electrical load
to the solar array if it is not part of the
LORENTZ Pump system. Connection of
a battery charger, active solar tracker
controller, electric fence charger, or other
load simultaneously with LORENTZ pump
systems may lead to improper operation.
9.2.2 Connecting the DC Input Cables
To access the clamping terminals, open the lid of
the housing and un-screw the touch protection (4x
Philips screws):
Figure 10: Screw locations for touch protection of the
PV Disconnect 400-50-1-S (4pcs):
Figure 11: Screw locations for touch protection of the
PV Disconnect 400-50-3-S and 400-50-6-S (4pcs):

GND
+
Out
-
In
-
Out
+
In
A
B
+
Out
+
In GND
-
In
-
Out
12 Installation Installation 13
EN EN
l WARNING – Do not commission the
PV Disconnect without reassembling
the touch protection to avoid an electric
shock hazard.
Use only the cable entries provided to bring the DC
inputs into the housing. Remove the plastic sealing
cap of the cable gland in advance.
The cable conduits must be tightened properly to
provide an eective seal.
Figure 12: Left (green): Correctly tightened / Right
(Red): Not tightened:
9.2.3 Wiring Connection
DC Input Cables (coming from PV Strings or PV
Combiner depending on the installation):
Connect the DC Input cables with positive pole
"Red" to the left terminals labeled with “(+) In” and
all cables with negative pole "Black" to the right
terminals labeled with “(-) In ”. (See Figure 13 and
Figure 14 on page 13 and Figure 15 on page
14).
DC Output Cables (going to Controller):
Connect the two cables leaving the box in the
output of the PV Disconnect labeled with “Red (+)
Out" and "Black (-) Out” and connect them to the
pump Controller. For more details about the output
connections to the Controller, refer to the PS2
system manual.
Grounding (GND)
The surge protector (SPD), which is already built-in,
needs a proper earth connection, connect the
ground wire to the GND output of the PV Disconnect.
For more details please refer to the "9.2.4
Grounding" on page 14.
Note: The correct torque for the terminal screws is
1,2Nm.
Figure 13: Wiring terminals of the PV Disconnect
400-50-1-S:
Figure 14: Wiring terminals of the PV Disconnect
400-50-3-S:

GND
+
Out
-
In
-
Out
+
In
14 Installation Installation 15
EN EN
Figure 15: Wiring terminals of the PV Disconnect
400-50-6-S:l WARNING – Make sure that all terminal screws are tightened properly to
avoid damage and abnormal operation.
All terminal screws must be double-
checked for tightness!
l WARNING – Make sure that all PV
Strings are connected with the correct
polarity or the PV Modules will get
damaged immediately.
l WARNING – Before connecting the
PV Modules to each other make sure
that the installation is complete, and the
touch protection has been re-installed.
9.2.4 Grounding
Grounding of the PV Disconnects 400-50-1-S,
400-50-3-S and 400-50-6-S is necessary due to the
built-in SPD.
The grounding cable should be a copper cable with a
size of not less than 6 mm² (AWG #10). The grounding
rod should be located as close to the box as possible
to avoid long cable runs; max. 5 m (16 ft) from the
Box. The cable must not carry any mechanical loads.
Grounding Cable
Grounding Rod
Figure 16: Grounding rod (Schematic example): The rod must be completely buried in the ground.
Please observe to local standards and requirements,
they may dier from these instructions.
In general, grounding is mandatory to protect the
users from potentially fatal electrical shocks. It is
meant for indirect lightning strikes and induced
electrical potential during operation of the pump
system.
l WARNING – The wiring must be done
by qualied sta only. The grounding
cable must have a reliable connection to
the ground, otherwise it will not provide
any protective function.
l WARNING – Please measure the
nal out voltage from the PV Wiring and
ENSURE it is less than the maximum
voltage allowed at the pump controller.
l WARNING – The SPD must be
connected to a proper ground source
otherwise it will not provide any
protection.

16 Troubleshooting
EN
About LORENTZ
LORENTZ is the global market leader
in solar powered water pumping
solutions. Founded in Germany
during 1993 LORENTZ has pioneered,
innovated and excelled in the
engineering and manufacturing
of solar powered water pumping.
Today LORENTZ is active in over 130
countries through a dedicated network
of professional partners. LORENTZ
technology uses the power of the
sun to pump water, sustaining and
enhancing the life of millions of people,
their livestock and crops.
Simply – Sun. Water. Life.

LORENTZ India
Pvt. Ltd.
Netaji Subhash
Place
Pitampura110034
New Delhi
I n d i a
LORENTZ China
No 34 Jiuan Road
Doudian Town
F a n g s h a n D i s t r i c t
102433 Beijing
China
LORENTZ US Corp
710 S HWY 84
Slaton, TX 79364
USA
LORENTZ Germany
Siebenstücken 24
24558 Henstedt-
Ulzburg
Germany
www.lorentz.de
v230320
10 Troubleshooting
Please read this section before calling for help.
If you contact LORENTZ for technical support, please
refer to the model and serial numbers (if applicable).
If the pump does not run:
Most problems are caused by wrong connections
(in a new installation) or failed connections. Failed
connections are normally a result of a terminal /
clamp not being tightened properly or a wire slipping
out of a terminal.
Please check if:
 The screws of all terminal clamps are tight.
 The polarity of all connected PV Strings is the
same and correct.
 Wire stripping is suitable for the terminals, no
clamped cable isolation.
 General condition of wires or signs of damage.
 The cables are corroded.
 There are short circuits in the system.
 The SPD has not blown / broken.
Inspect all wires and connections
Look carefully for incorrect or damaged wiring
(especially in a new installation).