Delta M88H_121 ST User manual

Solar Inverters
M88H_121 (ST) with Delta part number: RPI883M121300, Product version 0
M88H_122 (CF) with Delta part number: RPI883M122300, Product version 0
Quick Installation Guide
EuropeUnited Kingdom
solarsolutions.delta-emea.com

This quick installation guide applies to the following inver-
ter models:
●M88H_121 (with DC terminal block, Delta part number
RPI883M121300, product version 0)
●M88H_122 (with DC connections of multi-contact and
string fuses, Delta part number RPI883M122300, pro-
duct version 0)
with rmware versions:
DSP: 1.42 / RED: 1.03 / COM: 1.21 or higher
The Delta part number can be found on the type plate of the
inverter. The product version is shown by the last letters of the
serial number, which is also located on the type plate. The rm-
ware versions are listed on the display in the Inverter Info.
menu.
The Delta manuals undergo continuous revision in order to
provide you with complete information regarding the installation
and operation of our inverters. Therefore, before starting instal-
lation work, always consult solarsolutions.delta-emea.com to
check whether a newer version of the Quick Installation Guide
or of the comprehensive Installation and Operation Manual is
available.
© Copyright – Delta Electronics (Netherlands) B.V. – All rights
reserved.
This manual is intended for installers.
The information in this manual is to be treated as condential and
no part of this manual may be reproduced without prior written
permission from Delta Electronics. The information in this manual
may not be used for any purpose not directly connected to the
use of the inverter.
All information and specications can be modied without prior
notice.
All translations of this manual that are not authorized by Delta
Electronics (Netherlands) B.V. must be marked with the words
"Translation of the original operating instructions."
Delta Electronics (Netherlands) B.V.
Tscheulinstraße 21
79331 Teningen
Germany
Authorized representative for this product in the EU:
Delta Electronics (Netherlands) B.V.
Zandsteen 15
2132 MZ Hoofddorp
Netherlands
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
2

Basic safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
M88H_121 (ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
M88H_122 (CF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Components of the inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
M88H_121 (ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
M88H_122 (CF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Display, buttons, and LEDs / Type plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Hazard zones in the wiring box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Planning the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
AC and DC cable requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
M88H_121 (ST) – AC and DC terminal blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
M88H_121 (ST) – AC and DC cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
M88H_122 (CF) – AC Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
M88H_122 (CF) – DC cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Special instructions for the use of aluminum cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Communications cable requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Routing the cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mounting the inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Grounding the inverter housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Connecting to the grid (AC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
M88H_121 (ST) – Cable gland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
M88H_121 (ST) – Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
M88H_122 (CF) – Cable gland. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
M88H_122 (CF) – Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Connecting to the solar modules (DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
M88H_121 (ST) – Cable gland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
M88H_121 (ST) – 1-/2-MPP Tracker operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
M88H_122 (CF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Correctly closing the terminal box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Connecting the communication card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Connecting a data logger via RS485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Connecting the digital inputs, dry contacts and external power-off (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Attaching warning labels to the inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Commissioning – Basic settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Commissioning – Further settings (optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Inverter ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Baud rate for RS485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
AC connection type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
External shutdown (E-Power off, EPO). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Active power limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Dry contacts (relays) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
M88H_121 (ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
M88H_122 (CF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Customer Service - Europe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
3
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
Table of contents

Safety instructions for all M88H
WARNING
Electric shock
When the cover is removed from the wiring box,
this exposes voltage-carrying parts and protec-
tion conforming to IP65 is no longer guaranteed.
►Remove the cover only when absolutely
necessary.
►Do not remove the cover if water or dirt
might enter the inverter.
►After work is completed, ensure that the
cover is properly replaced and screwed in.
Check that the cover is properly sealed.
NOTICE
Incorrectly dimensioned solar system.
A solar system of the wrong size may cause
damage to the inverter.
►When calculating the module string, always
pay attention to technical data of the inverter
(input voltage range, maximum current
and maximum input power); see chapter
"Technical Data."
●To comply with the IEC 62109-5.3.3 safety requirements
and avoid injury or material damage, the inverter must be
installed and operated in accordance with the safety and
operating instructions set out in this manual. Delta Electro-
nics is not responsible for damage resulting from failure to
follow the safety and operating instructions set out in this
manual.
●The inverter may be installed and commissioned only by
installers who have been trained and certied for the instal-
lation and operation of mains-based solar inverters.
●All repair work on the inverter must be carried out by Delta
Electronics. Otherwise, the warranty will be void.
●Warning instructions and warning symbols attached to the
inverter by Delta Electronics must not be removed.
●The inverter has a high leakage current value. The groun-
ding cable must be connected before commencing opera-
tion.
●Do not disconnect any cables while the inverter is under
load due to risk of a fault arc.
●To prevent damage due to lightning strikes, follow the provi-
sions that apply in your country.
●The surface of the inverter can get very hot during operati-
on. Wear safety gloves when you touch the inverter (apart
from at the display).
●The inverter is very heavy. For lifting and moving use a me-
chanical lifting device (e.g. a crane or hoist). At least three
persons are required for manual hoisting and moving.
●Only equipment in accordance with SELV (EN 60950) may
be connected to the RS485 interfaces.
●All connections must be sufciently insulated in order to
ensure the IP65 degree of protection. Unused connections
must be closed using cover caps.
Safety instructions for the M88H_121 (ST)
DANGER
Electric shock
Potentially fatal voltages are present at the
inverter during operation. When the inverter
is disconnected from all power sources, this
voltage remains in the inverter for up to 100
seconds.
Therefore, always carry out the following steps
before working on the inverter:
1. Disconnect the inverter from all AC and DC
voltage sources and make sure that none
of the connections can be accidentally
restored.
2. Wait at least 100 seconds until the internal
capacitors have discharged.
DANGER
Electric shock
Potentially fatal voltages are present at the
inverter DC connections. When light falls on the
solar modules, they immediately start to genera-
te electricity. This also happens when light does
not fall directly on the solar modules.
►Never disconnect the inverter from the solar
modules when it is under load.
►Disconnect the connection to the mains so
that the inverter cannot supply energy to the
mains.
►Disconnect the inverter from all AC and DC
voltage sources. Ensure that none of the
connections can be restored accidentally.
►Ensure that the DC cables cannot be
touched accidentally.
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
4
Basic safety instructions

Safety instructions for the M88H_122 (CF)
DANGER
Electric shock
Potentially fatal voltages are present at the
inverter during operation. When the inverter
is disconnected from all power sources, this
voltage remains in the inverter for up to 100
seconds.
Therefore, always carry out the following steps
before working on the inverter
1. Turn the DC isolating switch to the 0 (OFF)
position.
2. Disconnect the inverter from all AC and DC
voltage sources and make sure that none
of the connections can be accidentally
restored.
3. Wait at least 100 seconds until the internal
capacitors have discharged.
DANGER
Electric shock
Potentially fatal voltages are present at the
inverter DC connections. When light falls on the
solar modules, they immediately start to genera-
te electricity. This also happens when light does
not fall directly on the solar modules.
►Never disconnect the inverter from the solar
modules when it is under load.
►Turn the DC isolating switch to the 0 (OFF)
position.
►Disconnect the connection to the mains so
that the inverter cannot supply energy to the
mains.
►Disconnect the inverter from all AC and DC
voltage sources. Ensure that none of the
connections can be restored accidentally.
►Ensure that the DC cables cannot be
touched accidentally.
5
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
Basic safety instructions

Part Description Part Description
M88H_121 inverter
with wiring box 1Mounting plate 1
Cover caps
For closing the upper cable feed-throughs on the wiring box when the power module is removed from
the wiring box. The cover caps are tted to the mounting plate.
2
1
Cable gland for AC
feed-through 1
For feeding the AC cable into the
wiring box.
M6 grounding material 1
For grounding the inverter
housing; contains M6 nut, spring
washer and washer; mounted on
the inverter.
Cable gland for DC
feed-through 2
For feeding the DC cable into the
wiring box.
Screening plate for the
air inlet 2
For covering the air inlets and pre-
venting the entry of small animals.
Cable gland for the
communication con-
nection
1
For fastening the communication
cables to the wiring box.
Quick installation
guide and basic safety
instructions
1
Solar-Wechselrichter M88H_121 (ST) und M88H_122 (CF,Produktversion D)
Installationskurzanleitung
Deutschland Österreich SchweizBelgien
M6 mounting screw 5
For fastening the wiring box to the
mounting plate; with spring washer
and washer.
Display cover 1
To protect the display against
damage
Check the delivery for completeness and all components for damage before starting instal-
lation work.
Do not use any damaged components.
Keep the packaging.
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
6
Scope of delivery
M88H_121 (ST)

Part Description Part Description
M88H_122 inverter
with wiring box 1Mounting plate 1
Cover caps
For closing the upper cable feed-throughs on the wiring box when the inverter part is disconnected.
The cover caps are tted to the mounting plate.
2
1
DC plug
18
Multi-Contact MC4 plug for DC +
(32.0017P0001-UR for 4/6 mm2)
M6 grounding material 1
For grounding the inverter
housing; contains M6 nut, spring
washer and washer; mounted on
the inverter.
18
Multi-Contact MC4 plug for DC–
(32.0016P0001-UR for 4/6 mm2)
M6 mounting screw 5
For fastening the wiring box to the
mounting plate; with spring washer
and washer
Cable gland for the
AC connection 1
For feeding the AC cable into the
wiring box
Cable gland for the
communication con-
nection
1
For fastening the communication
cable to the wiring box
Quick installation
guide and basic
safety instructions
1
Solar-Wechselrichter M88H_121 (ST) und M88H_122 (CF,Produktversion D)
Installationskurzanleitung
Deutschland Österreich SchweizBelgien
Screening plate for the
air inlet 2
For covering the air inlets and pre-
venting the entry of small animals.
Display cover 1
To protect the display against
damage
7
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
Scope of delivery
M88H_122 (CF)

13
6.2
12
4.2
10
11
1 2
3
4.1
6.1
5
7
9
8
11
11.1
11.4
11.3
11.2
1Power module 8Grounding connection
2Display, buttons, and LED 9Mounting plate
3Fan module 10 Cable gland for the communication connection
4Filter for air outlet (2x) 11 Communication card
5Filter for air inlet 12 AC cable gland
6Cover panel for the air inlet (2x) 13 Cover panel for the wiring box
7DC cable gland (2x)
11.1 RS485 connection
11.2 Digital inputs
11.3 Dry contacts
11.4 DIP switch for VCC and RS485 termination resistor
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
8
Components of the inverter
M88H_121 (ST)

14
1517 16
14 Type-2 DC surge protection devices 16 Type-2 AC surge protection devices
15 DC terminal block 17 AC terminal block
DANGER
Modied design of the DC connections
The design of the DC connections on the DC
terminal block has changed in comparison with
previous versions of the M88H_121 (ST)!
►You must comply with the correct use of plus
(+) and minus (-) when connecting the DC
cables.
9
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
Components of the inverter
M88H_121 (ST)

13
6.2
4.2
12
11
1 2
3
4.1
6.1
5
9
8
7
10
10.1
10.4
10.3
10.2
10
1Power module 8DC Disconnection switch
2Display, buttons, and LED 9Mounting plate
3Fan module 10 Communication card
4Filter for air outlet (2x) 11 Cable gland for the communication connection
5Filter for air inlet 12 AC cable gland
6Cover panel for the side air inlet (2x) 13 Cover panel for the wiring box
7Grounding connection
10.1 RS485 connection
10.2 Digital inputs
10.3 Dry contacts
10.4 DIP switch for VCC and RS485 termination resistor
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
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Components of the inverter
M88H_122 (CF)

14 15
18 1617
14 Type-2 AC surge protection devices 16 DC1 string fuses 18 AC terminal block
15 Type-2 DC surge protection devices 17 DC2 string fuses
11
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
Components of the inverter
M88H_122 (CF)

100 seconds
Danger to life through electric shock
Potentially fatal voltage is present inside the inverter during operation and this voltage remains present for up
to 100 seconds after disconnection from the power supply.
Only the wiring box may be opened. All other device parts may not be opened.
Before working on the inverter, read the supplied manual and follow the instructions contained therein.
This inverter is not separated from the grid by a transformer.
The housing of the inverter must be grounded if this is required by local regulations.
WEEE mark
The inverter must not be disposed of as standard household waste, but in accordance with the applicable
electronic waste disposal regulations of your country or region.
This regulatory symbol does not apply to the EU because the noise level lies below the EU guidelines.
EXIT EXIT
Exit the current menu.
Cancel the setting for a parameter.
Changes are not applied.
Down
Move downwards in the menu.
Reduce the value of a congurable
parameter.
Up
Move upwards in the menu.
Increase the value of a congurable
parameter.
ENT ENTER
Select menu item.
Open a congurable parameter for
editing.
Cancel the setting for a parameter.
Changes are adopted.
Grid Grid
Green LED Lights up when the
inverter is supplying electricity to the
mains grid.
AlArm Alarm Red LED Indicates an error, a failure
or a warning.
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
12
Display, buttons, and LEDs / Type plate

DANGER
Modied design of the DC inputs
The design of the DC inputs on the DC terminal
block has changed in comparison with previous
versions of the M88H_121 (ST)!
►You must comply with the correct use of plus
(+) and minus (-) when connecting the DC
cables.
Hazard zones with potentially life-threatening currents and voltages – M88H_122 (CF)
Hazard zones with potentially life-threatening currents and voltages – M88H_121 (ST)
DANGER
Electric shock
The cover in the interior of the wiring box does
not have to be removed for cabling work.
All connections are accessible, even when the
internal cover is installed.
13
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
Hazard zones in the wiring box

Outdoor installations
►The inverter has a protection degree of IP65 and can be
installed indoors and outdoors. Despite this, the inverter
should be protected by a roof against direct solar irradiati-
on, rain and snow. For example, the power of the inverter
will be reduced if it is too heavily heated by solar radiation.
This is normal operating behavior for the inverter and is
necessary to protect the internal electronics.
Installation location of the inverter
►Attach the inverter so that the information on the display
can be read and the buttons can be operated without any
problems.
?
?
?
?
✔✘ ✘
►The inverter is very heavy. The wall
or mounting system must be able
to bear the heavy weight of the
inverter.
►Always use the mounting plate
supplied with the inverter.
►Use mounting materials (dowels,
screws etc.) that are suitable for the
wall or the mounting system, as well
as the heavy weight of the inverter.
►Mount the inverter on a vibration-
free wall to avoid disruptions.
►When using the inverter in residenti-
al areas or in buildings with ani-
mals, possible noise emissions can
be disturbing. Therefore, carefully
choose the place of installation.
►Mount the inverter on a reproof
wall.
Mounting alignment
≥15°
≤90° 0° ... 90°
≥ 30 cm
Mounting without mounting rack Mounting with mounting rack
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
14
Planning the installation

>50 cm
>80 cm
>40 cm >60 cm
>60 cm
>60 cm
►Ensure sufcient air circulation. Hot air
must be able to dissipate upwards. Lea-
ve enough space around each inverter.
►Do not install inverters above one ano-
ther so that they do not heat each other.
►Note the Operating temperature ran-
ge without derating and the Operating
temperature range. When the Operating
temperature range without derating is
exceeded, the inverter reduces the AC
power fed into the mains grid. When the
Operating temperature range is excee-
ded, the inverter stops feeding AC power
into the mains. This is normal operating
behavior for the inverter and is necessary
to protect the internal electronics.
►In areas with many trees or elds, pollen
can clog the air inlets and outlets, hinde-
ring the air ow.
Installation clearances and air circulation
Lifting and transporting the inverter
►Screw the eyebolts onto the top side of the inverter. The
screw eyebolts are not included in the scope of delivery.
►Lift the inverter using a block and tackle or crane.
15
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
Planning the installation

50 155 485 128
37
75
690
602
123
41
205
230
612
875
M6
∅8.5
42
986
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
16
Dimensions

293
275
30
26
875
17
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
Dimensions

General information
The section describes the general technical characteristics of
the AC and DC terminal blocks. The special features which
apply to the installation of the inverter are explained in the fol-
lowing sections.
AC and DC terminal blocks are of the same type.
The specications in this section have been
dened by Phoenix Contact. Check if the techni-
cal specications have changed before starting
installation work; see www.phoenixcontact.com.
NOTICE
Danger of a cable re.
Bending and twisting causes damage to the
inner structure of the conductor, which leads to
punctiform increase in electrical resistance. This
can result in an overheating of the conductor
and destruction of the insulation.
►When bending and twisting cables or
conductors, always comply with the
manufacturer’s instructions.
AC and DC terminal block specications
Naming Phoenix Contact UKH 150
Connection type Screws with hexagon socket head
Screw thread M10
Rated current IN309 A
Rated voltage UN1000 V
Attaching the conductor
Type of attachment M10 screws with hexagon socket
head
Tightening torque 25 ... 30 Nm
Specication for copper cable
Min./max. Wire cross-section
Without wire end sleeve
●Rigid cable 35 ... 150 mm2
●Flexible cable 50 ... 150 mm2
with wire end sleeve
●Flexible cable (wire end sleeve
without plastic sleeve)
50 ... 150 mm2
●Flexible cable (wire end sleeve with
plastic sleeve)
50 ... 150 mm2
Stripping length 40 mm
Specication for aluminum cable
SE SM-S SM-L
RE RM-S RM-L
SE sector-shaped, solid conductor
SM-S sector-shaped, multi-conductor, rigid wires
SM-L sector-shaped, multi-conductor, (stranded wires)
RE round, solid conductor
RM-S round, multi-conductor, rigid wires
RM-L round, multi-conductor, (stranded wires)
The terminals have been specially developed for direct connec-
tion of sector-shaped, solid (SE) aluminum cables:
Min./max. Conductor cross-section 120 / 150 mm2
Stripping length 40 mm
SE
90°
If other types of aluminum cables are to be used, Al-Cu com-
pression joints (e.g. fromKlauke, Elpress or Mecatraction) must
be used; see „Special instructions for the use of aluminum
cables“, page 22.
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
18
AC and DC cable requirements
M88H_121 (ST) – AC and DC terminal blocks

AC cable
AC cable gland
The inverter has 1 AC cable gland with 1 cable feed-through.
Min./max. Cable diameter 23.9 ... 65.9 mm
Notes on calculating the cable cross-section
Consider the following factors when calculating the cable cross-
section:
●Cable material
●Temperature conditions
●Cable length
●Installation type
●Voltage drop
●Loss of power in the cable
Always follow the installation regulations for AC cables appli-
cable in your country.
France: Follow the installation instructions of UTE 15-712-1.
This standard contains requirements for minimum cable cross-
sections and to prevent overheating due to high currents.
Germany: Follow the installation instructions of VDE 0100-712.
This standard contains requirements for minimum cable cross-
sections and to prevent overheating due to high currents.
DC cables
DC cable gland
The inverter has 2 DC cable glands with 2 cable feed-throughs
each.
Min./max. Cable diameter 12.4 ... 25.7 mm
Instructions for the use of aluminum cables
See „Special instructions for the use of aluminum cables“,
page 22.
19
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
AC and DC cable requirements
M88H_121 (ST) – AC and DC cable

AC cable
General information on the AC terminal block
The section describes the general technical characteristics of
the AC terminal blocks. The special features which apply to the
installation of the inverter are explained in the following sec-
tions.
The specications in this section have been
dened by Phoenix Contact. Check if the techni-
cal specications have changed before starting
installation work; see www.phoenixcontact.com.
NOTICE
Danger of a cable re.
Bending and twisting causes damage to the
inner structure of the conductor, which leads to
punctiform increase in electrical resistance. This
can result in an overheating of the conductor
and destruction of the insulation.
►When bending and twisting cables or
conductors, always comply with the
manufacturer’s instructions.
AC terminal block specications
Naming Phoenix Contact UKH 70
Connection type Screws with hexagon socket head
Screw thread M8
Rated current IN96 A
Rated voltage UN1000 V
Attaching the conductor
Type of attachment M8 screws with hexagon socket
head
Tightening torque 8 ... 10 Nm
Specication for copper cable
Min./max. Wire cross-section
Without wire end sleeve
●Rigid cable 16 ... 95 mm2
●Flexible cable 25 ... 70 mm2
with wire end sleeve
●Flexible cable (wire end sleeve
without plastic sleeve)
16 ... 70 mm2
●Flexible cable (wire end sleeve with
plastic sleeve)
16 ... 70 mm2
Stripping length 24 mm
Specication for aluminum cable
SE SM-S SM-L
RE RM-S RM-L
The most important cable types for aluminum cable
SE sector-shaped, solid conductor
SM-S sector-shaped, multi-conductor, rigid wires
SM-L sector-shaped, multi-conductor, (stranded wires)
RE round, solid conductor
RM-S round, multi-conductor, rigid wires
RM-L round, multi-conductor, (stranded wires)
The terminals have been specially developed for direct connec-
tion of sector-shaped solid conductor (SE) aluminum cables:
Conductor cross-section 50 / 70 mm2
Stripping length 24 mm
SE
90°
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
20
AC and DC cable requirements
M88H_122 (CF) – AC Cable