AEC TOUGH-3P Series User manual

Allis Electric Co., Ltd.
Installation Manual
Three-Phase Grid-Connected
Photovoltaic Inverter
TOUGH-3P - Series

All specifications are subject to change without prior notice. Ver. 1.0

These applied symbols are important for human safety. Violation of
warnings may result in injury to persons or cause death.
WARNING！
RISK OF ELECTRIC SHOCK
WARNING！
RISK OF ELECTRIC SHOCK, ENERGY STORAGE TIMED
DISCHARGE
WARNING！
RISK OF DANGER
WARNING！
HOT SURFACE
REFER TO THIS OPERATIONAL MANUAL
THIS MANUAL IS COPYRIGHT PROTECTED.
Copyright©2017 TOUGH-3P-series Products. All rights
reserved by ALLIS Electronic Co., Ltd. Unless otherwise
specified, no part of this manual may be reproduced or
utilized in any form or by any means, including electronic,
mechanical or photocopying, without permission in writing
from either Allis or Allis's legal representative.

Safety Notes
General Cautions
！
Read and follow all instructions in this manual. Failure to comply with
the warnings in this manual may violate safety standards. The
manufacturer assumes no liability for th
e customer’s failure to
comply with these requirements.
！
Installation of the device must be in accordance with the relevant
safety regulations. Correct grounding and over-
current protection
must be provided to ensure operational safety.
！
Pay attention
to the high temperature components and sharp edges.
The temperature of the heat sinks on the outside of the device can
reach over 70°C in normal operation. There is the risk of burn injury
when these parts are touched.
Warning, Risk of electric shock
Personnel must remove all conductive jewelry or personal equipment
prior to installation or service of the device, parts, connectors, and/or
wiring.
Only the licensed and qualified electricians are allowed to perform the
installation, wiring, maintenance or modification on the device.
Switch off the circuit breakers before installation and wirings. Never
stand on a wet location when working on installation and wirings.
Even when no external voltage is presented; the inverter can still
contain high
voltages and the risk of electrical shock. Allow 5 minutes
for the inverter to discharge completely after disconnecting the AC
and DC sources from the inverter.
The inverter must be provided with an equipment-
grounding
conductor connected to the AC ground.

Maintenance and Clean
Each inverter is well calibrated before shipment and needs no
additional maintenance during normal operation.
！
Alterations are not to be made and no tampering with the assembly in
the inverter without the manufacturer’s aut
horization unless
specified elsewhere in this manual. They may result in injury, electric
shock, or fire and void the warranty.
！
The inverter contains no user serviceable parts inside. Only trained
staff is authorized to repair the unit. Please contact t
he specialized
dealer or system technician for further examination.
！
Wipe the enclosure and display lens with a soft cloth. Do not use
aggressive detergent or cleaning solvents.
！
Switch the DC disconnect on and off at least once per month in order
to clean the contacts of switch.

Contents
1 INTRODUCTION ............................................................................... 1
1.1 GENERAL ............................................................................................ 1
1.2 SPECIFICATIONS ................................................................................. 2
1.3 FUNCTIONS AND FEATURES ............................................................... 6
1.4 ACCESSORIES ...................................................................................... 7
2 INSTALLATION .................................................................................. 8
2.1 PLACEMENT ....................................................................................... 8
2.2 MOUNTING ......................................................................................... 9
2.2.1 SAFETY NOTES............................................................................................... 9
2.2.2 INSTALL INVERTER ON WALL .................................................................... 10
2.2.3 CHECK INSTALLATION STATUS ................................................................... 13
2.3 WIRING THE INVERTER .................................................................. 14
2.3.1 SAFETY NOTES............................................................................................. 14
2.3.2 INTRODUCTION ............................................................................................ 14
2.3.3 DC INPUT WIRING ...................................................................................... 15
2.3.4 COM LINE CONNECTION ........................................................................... 18
2.3.5 AC OUTPUT WIRING .................................................................................. 23
3 OPERATION .................................................................................... 27
3.1 OVERVIEW ....................................................................................... 27
3.2 LCD DISPLAY .................................................................................. 28
3.3 BUTTONS ON PANEL ........................................................................ 29
3.4 L ED INDICATION ............................................................................ 29

3.4.1 OPERATIONAL STATUS ................................................................................ 30
3.4.2 CHECK ERROR MESSAGE ............................................................................ 32
3.4.3 SETTING BEFORE OPERATION ................................................................... 33
3.4.4 INFORMATION .............................................................................................. 35
3.5 DESCRIPTIONS OF ERROR MESSAGES ............................................. 37
3.6 TROUBLESHOOTING ........................................................................ 42
4 TECHNICAL DOCUMENTATION ................................................. 47
4.1 OUTLINE DRAWING ........................................................................ 47
4.2 MPP EFFICIENCY ............................................................................ 48

List of Figures
Fig 1: Grid connected solar system overview......................................................................... 1
Fig 2: Accessories in the package ............................................................................................... 7
Fig 3: Hanging surface ................................................................................................................... 9
Fig 4: Clearances required for installation ........................................................................... 10
Fig 5: Fasten the mounting bracket ........................................................................................ 11
Fig 6: Hook the inverter on the mounting bracket ........................................................... 11
Fig 7: Fasten the screws .............................................................................................................. 12
Fig 8: Enclosure bottom view .................................................................................................... 14
Fig 9: Assemble your DC terminals (solar panel) - step 1 ............................................... 16
Fig 10: Assemble your DC terminals (solar panel) - step 2 ............................................ 16
Fig 11: Complete your DC terminals (solar panel)............................................................ 17
Fig 12: Communication interface assignment .................................................................... 18
Fig 13: Communication interface RJ45 pins assignment................................................ 18
Fig 14: Remove the RS485 port housing ............................................................................... 20
Fig 15: Assemble the communication cable gland ........................................................... 20
Fig 16: Assemble the communication cable ........................................................................ 21
Fig 17: Lock the RS485 port housing ..................................................................................... 21
Fig 18: Fasten the waterproof cable gland nut ................................................................... 21
Fig 19: Multi-inverter wiring by RS485 ................................................................................. 22
Fig 20: Assemble your AC contacts terminals - step 1 ..................................................... 23
Fig 21: Assemble your AC connector housing - step 2 ..................................................... 24
Fig 22: Assemble your AC connector cable clamp - step 3 ............................................. 24
Fig 23: Assemble your AC connector cable - step 4 .......................................................... 25
Fig 24: Push the connector until the latch is positioned ................................................. 25
Fig 25: Complete your AC wire connection .......................................................................... 26
Fig 26: Overview front panel of the inverter ....................................................................... 27
Fig 27: LCD display overview..................................................................................................... 28
Fig 28: Outline drawing .............................................................................................................. 47

Fig 29: MPP Efficiency of the TOUGH-3P-SERIES .............................................................. 48

1
1 Introduction
1.1 General
The TOUGH-3P series is a three phase grid-connected inverter solution from
AEC. The grid-connected inverter converts DC power yielded from solar
array into AC power for household consumption. The inverter operates
intelligently under normal conditions and provides no backup power in case
of power cut. The configuration is straightforward as shown below. Connect
the PV wires from floating (ungrounded) PV array to the DC input of the
inverter; also, connect the AC output to the service entrance. Please consult
with your installer for PV array ratings and external protective devices if the
electrical codes are stipulated locally.
Fig 1: Grid connected solar system overview

2
1.2 Specifications
Model Tough-10K-3P
Tough-12.5K-3P Tough-15K-3P
Output Data (AC)
Maximum AC Output Power 10,000VA 12,500VA 15,000VA
Maximum AC Output Current 16.5 a.c.A 20 a.c.A 25 a.c.A
Nominal AC Voltage 3x230 a.c.V/400 a.c.V
Grid AC Frequency 50/60Hz, auto-selection
Power Factor > 0.99 @ 20% load
Reactive Power Factor 1 or adjustable from -0.8 to +0.8*
Total Harmonic Distortion < 5%
Max. output fault current (Inrush) 46.2 Apeak / 200 μs
Max. output overcurrent protection 40 A
AC connection / Grid forms 3P4W+PE / TN-C, TN-S, TN-C-S
Input Data (Solar)
Maximum DC Power 10,500W 13,500W 15,800W
Maximum DC Input Current(IscPV) 2 x 15 d.c.A 2 x 15 d.c.A 2 x 17.5 d.c.A
Max. backfeed current to the array 0 d.c.A
Max. number of MPP Trackers 2
Maximum DC Voltage 1000 d.c.V
MPP Tracking Voltage Range 300-900 d.c.V
Operating Voltage Range 250-1000 d.c.V

3
Efficiency
MPPT Efficiency >99.9%
Maximum Efficiency 98.0% 98.1% 98.2%
Euro. Efficiency 97.2% 97.3% 97.4%
Consumption:
Operating (standby) / Night <20W / <1W
General Specification
Dimensions (W x H x D) in mm 437 x 607 x 167
Weight 22.5kg
Cooling Concept Forced Air Cooling
Acoustic Noise Level < 45dB(A)
Maximum Operating Temperature
Range without derating +50 °C +45 °C
Ambient Temperature Range -25 to +60 °C
Storage / Transportation Condition
Relative Humidity 4 to 95%, non-condensing
Storage / Transportation Condition
Operating Altitude 2000 m
Pollution Degree PD3
Protection Class of Enclosure IP65
Protection Class Class I
Overvoltage Category OVCⅡ(PV) / OVCⅢ(Mains)
Topology Transformerless

4
Features
DC Connection PV4, Tyco, MC4
DC Disconnect Option
AC Connection AC connectors
Display Large Iconic LCD screen
Communication Interface RS485 , Ethernet/WiFi (Option)
EMC & Low Voltage Directives 2004/108/EC & 2006/95/EC
Standards IEC/EN 62109-1/-2 ,
VDE-AR-N 4105
Warranty 5 years
*
Adjustable from 0.9 overexcited to 0.9 underexcited with VDE-AR-N
4105.
！
Non-isolated inverters shall be provided with installation
instructions that require PV modules that have an IEC 61730
Class A rating.

5
Adjustable voltage, Frequency and Reconnection Settings
Setting VDE-AR-N 4105
Range Default
Over-frequency (Hz) 50.05~51.50
(60.05~61.50)*
51.5
(61.5)*
Over-frequency disconnection time (cycle) 1~10 8
Under-frequency (Hz) 47.50~49.95
(57.50~59.95)*
47.50
(57.50)*
Under-frequency disconnection time (cycle) 1~10 8
Over-voltage (Vac) 235~264.5 264.5
Over-voltage disconnection time (cycle) 1~10 8
Under-voltage (Vac) 184~225 184
Under-voltage disconnection time (cycle) 1~10 8
DC injection tripping current (A) 0.1~1.0 1.0
DC injection
disconnection time (cycle) 1~150 8
Insulation resistance trip setting (MΩ) 0.5~10 0.5
PV start voltage (Vdc) 150~500 150
Reconnect delay** (s) 5~300 60
*
This inverter product is compatible on the frequency of 50Hz or 60Hz.
** Once a grid failure occurs, the inverter waits 5~300 seconds before the
next connection to the utility grid. The default setting is 60 seconds for
VDE-AR-N 4105.

6
1.3 Functions and Features
 DSP (Digital Signal Processor) makes use of the advanced digital
control technology to enhance the conversion efficiency and the added
functions.
 Conformity to the EMC, Low Voltage Directives and Standards, e.g.
2004/108/EC, 2006/95/EC, IEC/EN 62040-1, IEC/EN 62109-1/-2
and VDE-AR-N 4105.
 Single/Dual MPPT (Maximum power point tracking), the range of
MPPT: 300~900Vdc.
 Maximum efficiency: higher than 98.2%.
 Iconic display easy to monitor energy flow.
 Special external capacitor modular design for long life span.
 IP65 design / up to 45°C without derating.
 Low loss SVPWM configuration with high-frequency switching IGBT.
 Waterproof and quickly-installed connectors used.
 Monitor the power information and the system settings via a computer,
the monitoring software and RS485 / WiFi (optional) / Ethernet
(optional) interfaces (please refer to the Installation Manual).
 The power generation system is interactive and complementary to the
utility’s power. When the power generation is insufficient, it can be
supplied by the local utility’s power; when power cut happens,
disconnect the power automatically to maintain the personnel safety.

7
1.4 Accessories
Please check the inverter and accessories in the package. If there is some
part incomplete or any pages missing from the manual, please contact the
authorized agent. Please check the following items in the box:
A. Photovoltaic Inverter x 1
B. Mounting Bracket x 1
C. Female Cable Coupler Plus Key x 4 and Minus Key x 4
D. AC Female Connector x 1 (includes housing x 5, fool-proofing
housing x 1 and contacts x 5)
E. Connector cover x 2
F. Operation Manual (incl. warranty page) x 1
G. Fixing Screws (bet. the inverter and bracket) x 2
Fig 2: Accessories in the package
A. B.
C.
E. F.
D.
G.

8
2 Installation
2.1 Placement
Please take the following points into consideration when installing the
inverter and selecting the installation location:
 A solid and vertical wall is essential; not to hand it on a forward-tilting
surface. The backward-tilting angle must be less than 10°.
 The installation location of the inverter must conform to the size and
weight specifications (See the technical information on section 1.2.).
 The inverter installation location must have the appropriate amount of
space and be kept clear, and the inverter can be safely operated
without the assistance of auxiliary tools (such as ladder or lift).
 The installation location of the inverter must have at least 20 cm of
space. The environmental temperature must be kept at -25 °C ~ 60 °C.
 To obtain the best conversion efficiency, the DC and AC power
connection prefer the shortest distance. If the distance exceeds 20m,
it’s recommended that the diameter is increased (according to the
specifications of this inverter, the standard diameter of DC and AC
power wires are 12 AWG.).
 In order to select the appropriate installation location for the inverter,
please see the outline drawing.
 The inverters with IP65 rating can be installed outdoors. However, it’s
recommended to avoid direct sunlight and rain. If it can’t be avoided,
please install a rain shield to extend the lifetime of the inverter.
In theory this IP65 unit can be used in pollution degree
4. However, it is suggested to provide with means to
reduce the micro-environment to pollution 1, 2 or 3.

9
Fig 3: Hanging surface
2.2 Mounting
2.2.1 Safety Notes
Don’t remove the exter
nal cover of the inverter. No parts inside the
inverter are to be maintained by the user. If necessary, only qualified
maintenance staff can carry out; The solar panel exposed to sunlight
supplies DC power. Pay attention to electric shock when connecting
the DC power to the inverter.
！
The inverter (not stand-
alone type) is designed to connect in parallel
with the utility network. In order to avoid damage, the AC output can’t
be connected to a power generator or the like.
Heat will generate when the inv
erter operates. Don’t touch the heat
sink or on top of the enclosure to avoid injury due to the hot surface.

10
2.2.2 Install Inverter on Wall
1. Select the appropriate space and the solid and vertical surfaces
enough to support the inverter.
2. The space surrounding the inverter must be appropriate so that
heat can be dissipated easily and maintained conveniently, as
shown below.
Fig 4: Clearances required for installation