Delta M88 Series Specification sheet

M88H
Operation and Installation Manual
Grid-tie Transformerless Solar Inverter
The power behind competitiveness
www.deltaww.com
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繁體中文

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Table of Contents
1 Safety
1.1 Information of the Inverter
1.1.1 Disclaimer
1.1.2 Target Group
1.2 General Safety
1.2.1 Condition of Use
1.2.2 Symbols
2 Introduction
2.1 Valid Model
2.2 Product Overview
3 Installation
3.1 Mechanical Installation
3.2 Wiring box cover
3.3 Electrical Installation for AC Cabling
3.3.1 Required Protective Devices and AC Cabling Installation for M88H_121
3.3.2 Required Protective Devices and AC Cabling Installation for M88H_122
3.4 Electrical Installation for DC Cabling
3.4.1 DC Cabling Installation for M88H_121
3.4.2 DC Cabling Installation for M88H_122
3.5 Communication Module Connections
3.5.1 RS-485 Connection
3.5.2 EPO Function & Digital Input
3.5.3 Dry Contact connection
3.6 On-site insulation test
4 Commissioning
4.1 Display Introduction
4.2 First startup
4.2.1 Home Page
4.3 Power meter / String monitoring
4.4 Energy Log
4.5 Event Log
4.6 Inverter Information
4.7 General Settings
4.8 Install Settings
4.8.1 Inverter ID
4.8.2 Insulation
4.8.3 Grid Code
4.8.4 Grid Settings
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4.8.5 Dry Contact
4.8.6 Anti-PID function
4.8.7 EPO
4.8.8 AC connection
4.8.9 Max. Power
4.9 Active/Reactive Pwr
4.9.1 Active Power Ctrl
4.9.1.1 Power limit
4.9.1.2 Power vs frequency
4.9.1.3 P(V)
4.9.2 Rective power Ctrl
4.9.2.1 Constant cosphi
4.9.2.2 Cosphi (P)
4.9.2.3 Constant Q
4.9.2.4 Q(V)
4.9.3 Q setting 24∕7 function
4.9.3.1 Q setting point
4.9.3.2 Q(P)
4.9.3.3 Q(V)
4.9.3.4 Q(T)
4.10 FRT (Fault ride through)
5 Maintenance
5.1 Removing and re-installing the Wiring Box (WB) cover
5.1.1 Removing the WB cover
5.1.2 Re-installing the WB cover
5.2 Replace Surge Protection Device (SPD)
5.3 Smart Fans Replacement and Filters Cleaning
5.4 De-Commissioning
5.4.1 Disassemble the Wiring box compartment
6 Error message and Trouble Shooting
7 Technical Data
Appendix: Assembly Note
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Figure 2-1 : Components of M88H
Figure 2-2 : Overview of M88 series
Figure 2-3 : Rating labels of M88H
Figure 2-4 : Wiring box layout of M88H
Figure 3-1 : Attaching the Hoisting hooks
Figure 3-2 : Mounting bracket dimensions
Figure 3-3 : Required position for at least 8 screws
Figure 3-4 : Prohibited position for screws
Figure 3-5 : Permitted mounting positions
Figure 3-6 : Prohibited mounting positions
Figure 3-7 : Required mounting clearances
Figure 3-8 : Specification of fixing WB for wall-mounting installation
Figure 3-9 : Installation method of shielding plate
Figure 3-10 : Stripping cables for M88H_121 AC terminal
Figure 3-11: AC Gland with multiple inlet (M88H_121)
Figure 3-12 : Location for M88H_121 AC terminal
Figure 3-13 : Stripping cables for M88H_122 AC terminal
Figure 3-14: AC Gland with multiple inlet (M88H_122)
Figure 3-15 : Location for M88H_122 AC terminal
Figure 3-16 : AC gland assembling for M88H_122
Figure 3-17 : Guideline for aluminum conductor
Figure 3-18 : Guideline for bi-metal adapter
Figure 3-19: DC Gland with multiple inlet (M88H_121)
Figure 3-20 : Wiring Box layout for M88H_121
Figure 3-21 : Location for DC terminals for M88H_121
Figure 3-22 : One MPPT application for M88H_121
Figure 3-23 : Guideline for aluminum conductor
Figure 3-24 : Guideline for bi-metal adapter
Figure 3-25 : Wiring Box layout for M88H_122
Figure 3-26 : Location for DC terminals for M88H_122
Figure 3-27 : Communication Module
Figure 3-28 : Multiinverter connection illustration
Figure 3-29 : EPO function
Figure 3-30 : Dry Contact connection
Figure 3-31 : Precautions for on-site insulation test
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5

Figure 4-1 : Panel indicator
Figure 4-2 : Grid Code,language and ID settings for first startup
Figure 4-3 : Home page
Figure 4-4 : Power meter page
Figure 4-5 : Energy log Page
Figure 4-6 : Event log Page
Figure 4-7 : Inverter information page
Figure 4-8 : General settings page
Figure 4-9 : Install settings page
Figure 4-10 : Inverter ID page
Figure 4-11 : Insulation page
Figure 4-12 : Grid Code page
Figure 4-13 : Grid Settings page
Figure 4-14 : Dry Contact page
Figure 4-15 : PID function settings
Figure 4-16 : EPO page
Figure 4-17 : AC connection
Figure 4-18 : Max. Power page
Figure 4-19 : Active / Reactive pwr page
Figure 4-20 : Active Power Ctrl page
Figure 4-21 : Power Limit page
Figure 4-22 : Power vs Frequency page
Figure 4-23 : Power vs Frequency parameters
Figure 4-24 : P(V) page
Figure 4-25 : Reactive Power Ctrl page
Figure 4-26 : Constant cosphi page
Figure 4-27 : Cosphi (P) page
Figure 4-28 : Cosphi (P) curve
Figure 4-29 : Constant Q page
Figure 4-30 : Q(V) page
Figure 4-31 : Q(V) parameters
Figure 4-32 : Q setting 24/7 page
Figure 4-33 : Q setting point page
Figure 4-34 : Q(P) page
Figure 4-35 : Q(T) page
Figure 4-36 : FRT page
Figure 4-37 : FRT Parameters
Figure 5-1 : Removing and reinstalling the WB cover
Figure 5-2 : Re-installing process for Wiring Box cover
Figure 5-3 : AC and DC SPD
Figure 5-4 : Remove front cover of wiring box compartment
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Table
Table 2-1 : Packing list of M88H
Table 2-2 : Rating label explanation of M88H
Table 2-3 : Wiring box layout description of M88H
Table 3-1: Cable size comparison table (M88H_121)
Table 3-2: Cable size comparison table (M88H_122)
Table 3-3: Cable size comparison table (M88H_121)
Table 3-4 : Definition of RS-485
Table 3-5 : Terminal resister setting
Table 3-6 : Definition of digital input & EPO function
Table 4-1 : LED indicator
Table 4-2 : Dry Contact Trigger Setting
Table 5-1 : SPD Specifications
Table 6-1 : Error Message
Table 6-2 : Warning Message
Table 6-3 : Fault Message
Table 7-1 : Specifications for M88H
Appendix-1 : Assembly Note
Appendix-2 : Assembly Note for 121 model
Appendix-3 : Assembly Note for 122 model
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Figure 5-5 : The alarms indicate AC and DC SPD Fail
Figure 5-6 : Pull out the connectors and remove the screws as shown in arrows
Figure 5-7 : Fuse holder locations for M88H_122
Figure 5-8 : Accessing the individual fuses for M88H_122
Figure 5-9 : String monitor
Figure 5-10 : Smart fans location on Power Module compartment
Figure 5-11 : Smart fan location on WB (M88H_122 only)
Figure 5-12 : 12cm Potting fan kit
Figure 5-13 : Disassembling fan inside the wiring box compartment (M88H_122 only)
Figure 5-14 : Disassembling fans inside the power module compartment (showing one side only)
Figure 5-15 : Removal of filters
Figure 5-16 : The ON/OFF positions of DC Switches (M88H_122 only)
Figure 5-17 : Remove AC, DC, and communication cables and then unscrew 6 screws
Figure 5-18 : Remove 8 screws and then separate WB from PM
Figure 7-1 : Efficiency Curve (Output voltage at 480V)
Figure 7-2 : Efficiency Curve (Output voltage at 400V)
Figure 7-3 : Thermal Derating curve for 480Vac
Figure 7-4 : Thermal Derating curve for 400Vac
Figure 7-5 : Thermal Derating curve for 380Vac
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7

Copyright – DELTA ELECTRONICS, INC. - All rights reserved.
This manual accompanies our product for use by the end users. The technical
instructions and illustrations contained in this manual are to be treated as
confidential and no part may be reproduced without the prior written permission
of DELTA ELECTRONICS, INC. Service engineers and end users may not
divulge the information contained herein or use this manual for purpose other
than those strictly connected with correct use of the product. All information and
specifications are subject to change without notice.
DELTA ELECTRONICS, INC. shall have no obligation to both personal injury
and property damage hereinafter with respect to any actions -- (a) the product
has been installed and repaired improperly; (b) the product has been misuse
without following the instructions on this user manual; (c) the product has failed
due to incorrect unpacking.
1 Safety
1.1 Information of the Inverter
1.1.1 Disclaimer
This user manual of the solar inverter is prepared for a person who is well-trained
for installing, commissioning, using, and doing maintenance. The well-trained
person must have the following basic and advanced skills:
• The fundamentals of electricity, wiring, electrical components and electrical
schematic symbols.
• Knowledge of how a solar inverter works and is operated.
•
Training in the installation and commissioning of electrical devices and installations.
• Training in how to deal with the dangers and risks associated with installing
and using electrical devices and installations.
• Compliance with this manual and all safety information.
Please read the user manual before working on the product.
1.1.2 Target Group
Safety
8

1.2 General Safety
- Please read these instructions carefully and save them for later use.
IMPORTANT SAFETY INSTRUCTIONS : SAVE THESE INSTRUCTIONS !
To prevent any personal injury and any property damage, also ensure long-term
operation of the solar inverter, you must read this section carefully and review all
the safety instructions at all times before using this inverter.
This user manual provides important instructions for Delta grid-tie transformerless
solar inverter. The product is designed, tested, verified, and certified according
to international safety requirements, regulations, and standards but precautions
must be observed when installing and operating the product.
The M88H is a transformerless solar inverter with two MPP trackers which
converts the variable direct current of the solar array into a utility frequency
grid-compliant three-phase current and feeds it into the utility grid.
The Photovoltaic modules used must be compatible with the inverter.
Photovoltaic modules with a high parasitic capacitance to ground may only be
applied if the capacitive coupling does not exceed 8μF.
The inverter must only be operated in countries for which it is approved by Delta
and the grid operator.
1.2.1 Condition of Use
- There is no accessory such as a transformer along with our product and
therefore the product has no galvanic isolation.
External transformer should be installed between AC output of inverter and Grid.
Please do not connect grounded Photovoltaic modules to the product.
If you connect grounded Photovoltaic modules to the product, the error message
INSULATION (E34) shows up.
- It is prohibited to connect the L1, L2, L3, and N to the ground.
ATTENTION : NO GALVANIC ISOLATION
9
Safety

This section describes the definition of the symbols in this manual.
In order to prevent both personal injury and property damage, and to ensure
long-term operation of the product, please read this section carefully and follow
all the safety instructions while you use the product.
1.2.2 Symbols
DANGER!
- This warning indicates an immediate hazard which will lead to death or serious
injury may occur.
- This warning indicates a possible hazard which may lead to minor injury
may happen.
CAUTION !
WARNING !
- This warning indicates a possible hazard which may lead to death or serious
injury may occur.
- This warning indicates a possible damage to property and the environment
might happen.
ATTENTION
10
Safety

- Additional information is indicated by an exclamation mark enclosed by double
circle. This means the following section contains important information and
user should follow the instruction to prevent any hazards.
INFORMATION
DANGER : ELECTRICAL HARZARD!!
- This warning indicates an immediate electrical hazard which will lead
to death or serious injury may occur.
- This warning indicates be careful of hot surfaces when operating the product.
- Do not perform any task until the product cool down sufficiently.
CAUTION : HOT SURFACES, DO NOT TOUCH!
- Wait for a prescribed amount of time before engaging in the indicated action.
- Patientez le délai requis avant d’entreprendre l’action indiquée
- Equipment grounding conductor (PE)
- (PE) Équipement conducteur de terre
11
Safety

The M88H is designed to enable the highest levels of efficiency and provide
longest operating life of photovoltaic inverter by state-of-the-art high-frequency
and low EMI technology. It is suitable for outdoor use.
The user manual is valid for the following device types :
• M88H_121
• M88H_122
This user manual must be followed during installation, operation, and maintenance.
The M88 Series have 2 models as shown in Figure 2-2. Delta reserves the right
to make modifications to the content and technical data in this user manual
without prior notice.
2 Introduction
2.1 Valid Model
- There is no accessory such as a transformer along with our product and
therefore the product has no galvanic isolation.
External transformer should be installed between AC output of inverter and Grid.
Please do not connect grounded Photovoltaic modules to the product.
If you connect grounded Photovoltaic modules to the product, the error message
INSULATION (E34) shows up.
- It is prohibited to connect the L1, L2, L3, and N to the ground.
ATTENTION : NO GALVANIC ISOLATION
Introduction
12

The components of M88H is shown as Figure 2-1.
2.2 Product Overview
① ④
M88H
Object Qty Description
1 Delta Solar Inverter 1 pc
1 pc
1 pc
Solar inverter
2 User Manual
Important instructions for solar inverter
Safety instructions should be followed
during installation and maintenance
3
Mounting Bracket Wall mounting bracket
(Material: Aluminum/Thickness: 3mm)
4
5 pcsScrew To secure inverter to mounting bracket
(Stainless/M6/12mm)
Table 2-1 : Packing list of M88H
Figure 2-1 : Components of M88H
⑤
② ③
⑥ ⑦ ⑧
For 122 model
6 MC4 Connector 18 pairs String inputs (122 model only)
7 Nameplate Protection 1 pc Nameplate protectionfor display
8Nameplate Protection
Manual 1 pc Instructions for nameplate protection
5 Shielding Plate 1 pair Shelding plate for filter (use is optional)
13
Introduction

M88H_122 Air Outlets /
Smart Fans
Rating Label
SUB-1G
(optional)
DC SwitchMC4 type DC connector
18 pairs
Air Inlets
Communication
Connetions
Gland for AC Wiring
LCD / LED Display
and Buttons
Figure 2-2 : Overview of M88 series
M88H_121 Air Outlets /
Smart Fans
Rating Label
Gland for DC Wiring
Air Inlets
Communication
Connetions
Gland for AC Wiring
LCD / LED Display
and Buttons
14
Introduction

The following Figure 2-3 shows the rating labels of M88H along with these
labels explains the definition of the specific mark.
Figure 2-4 illustrates the layout of wiring box of M88H and the table (Table 2-3)
along with this layout describes the detail of each area.
This compartment includes inverter inputs (DC), outputs (AC), surge protection
device (SPD), fuse holder, DC switch and the communication connection such
as RS-485.
Figure 2-3 : Rating labels of M88H
Symbol Definition
Danger to life through electric shock
Potentially fatal voltage is applied to the inverter during operation.
This voltage persists even 100 seconds after disconnection of the power supply.
Never open the inverter. The inverter contains no components that must be
maintained or repaired by the operatoror installer.
Opening the housing will void the warranty.
Before working with the inverter, you must read the supplied
manual and follow the instructions contained therein.
This inverter is not separated from the grid with a transformer.
The housing of the inverter must be grounded if this is required
by local regulations.
WEEE marking
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.
Table 2-2 : Rating label explanation of M88H
100 seconds
Please be aware of noise protection.
15
Introduction

Table 2-3 : Wiring box layout description of M88H
Figure 2-4:Wiring box layout of M88H
ComponentNO. NO.
Cable gland for AC
Cable gland for DC
95mm2AC terminal
120mm2AC terminal
120mm2DC terminal
Fuse holder type DC IN1
Fuse holder type DC IN2
Component
DC switch
Type II AC SPD
7
6
8
9
10 15
NO. Component
Type II DC SPD
Internal AC terminal
Internal DC terminal
Wiring box fan13
14
11
MC4 connector
Grounding bar
1
2
3
4
5
12
⑩ ⑪⑥
⑲
⑭
⑦
IN 1 IN 2 IN 1 IN 2
M88H_122
M88H_121 ⑫⑪
①②
④ ⑨
⑩
⑤ ⑮
⑪ ⑫⑬
①
③
⑨
⑧
⑩
⑮
16
Introduction

The chapter contains instructions for (1) Mechanical installation; (2) Electrical
Installation; (3) Communication setup.
3 Installation
- The unit should not be installed in direct sunlight.
CAUTION !
WARNING !
- Do not install the unit near or on flammable surfaces.
- Please mount the unit tightly on a solid / smooth surface.
- Please fix at least 8 M8 Phillips head screws for the wall mounting bracket.
- The bracket shipped with the unit is specially designed and should be the only
mounting device for the mechanical installation.
CAUTION !
This unit is designed to be wall-mounted. Please ensure that the installation is
perpendicular to the floor and the AC and DC terminal are at the bottom position.
Please follow the instruction as shown from Figure 3-2 through 3-4. First, fix the
wall mounting bracket on a solid support surface. Second, please mount the
inverter on the bracket securely. Note that Figure 3-2 through 3-8 should be
followed.
To mount the inverter on the wall, please follow the procedure :
1. Screw the wall mounting bracket on the wall with at least 8 M8 Phillips head
screws. Please refer to Figure 3-2 and 3-3 for correct installation.
2. Figure 3-1 shows the hoisting hook instruction.
3.
There are two ways for fixing the wall mounting bracket as shown in Figure 3-3.
4. Hang the inverter on the wall mounting bracket.
5. Figure 3-4 through 3-8 describes correct mounting installation.
6.
Figure 3-8 shows the installation detail for fixing the wiring box.
3.1 Mechanical Installation
17
Installation

Figure 3-2:Mounting bracket dimensions
Figure 3-1:Attaching the Hoisting hooks
875.1
246
410
140.5
402.7
182.5
82
13
246
410
582
20
50
197
205
155 127.5 57
5
122
485.6
Φ8.5
Φ8.5
Please lock screw (M12 / 0.5 N•m) plugs or
keep hooks on the case after installation
to avoid water inflow.
Hoisting
Hook
Unit: mm
18
Installation

Necessary for vertical fixing Necessary for horizontal fixing
Figure 3-3:Required position for at least 8 screws
Figure 3-4:Prohibited position for screws
19
Installation

Figure 3-6:Prohibited mounting positions
O : Permitted
X : Prohibited
≧30cm
CAUTION !
Figure 3-5:Permitted mounting positions
90
Max. 90
≧30cm
ROOF DECK
TYP SUPPORT
STRUCTURE
Make sure the lowest point of the inverter
chassis must be ≧30cm from floor surface
and not susceptible to water immersion.
- Name plate cover is required for all types of installation.
-
To avoid malfunction of inverter caused by extreme weather (ex: snow, hail…etc) or non-proper
installation/maintenance, an additional protection cover is strongly recommended to be installed
by Delta. For more details, please contact local service team.
ROOF DECK
TYP SUPPORT STRUCTURE
Protection cover
Protection cover
20
Installation