CPS SCA Series User manual
CPS SCA Series Grid-tied PV Inverter
CPS SCH100KTL-DO/US-600
and SCH125KTL-DO/US-600
Installation and Operation Manual - Rev 1.0
CHINT POWER SYSTEMS AMERICA CO.
REVISON 1.0 FEB 2018
Table of Contents
Before You Start… .................................................................................. 1
Chapter 1 IMPORTANT SAFETY INSTRUCTIONS ................................ 2
Chapter 2 Overview ................................................................................ 5
2.1 Inverter for Grid-tied PV Systems ......................................... 5
2.2 Product Features .................................................................. 5
2.3 Product Protection Functions................................................ 6
2.4 Schematic Diagram and Circuit Design ................................ 7
2.5 Appearance and Main Item Description ................................ 8
2.6 Anti-islanding Detection ........................................................ 9
2.7 DC Ground Fault Protection ................................................. 9
2.8 Surge Suppression ............................................................... 9
2.9 DC Arc-fault Protection ......................................................... 9
Chapter 3 Installation ............................................................................. 10
3.1 Recommendations Before Installation .................................. 12
3.2 Mechanical Installation ......................................................... 13
3.3 Electrical Installation ............................................................. 27
3.3.1 Removing/Replacing the Wire-box Cover .............. 27
3.3.3 DC Connection ...................................................... 31
3.3.4 AC and Ground Connection ................................... 36
3.3.5 Communication Connection ................................... 44
Chapter 4 Commissioning (Via internal Wireless ) .............................. 49
4.1 Commissioning Checklist ..................................................... 49
4.1.1 Mechanical Installation .......................................... 49
4.1.2 Conductor Connections ......................................... 49
4.1.3 Electrical Check ..................................................... 49
4.2 Commissioning Steps ........................................................... 50
4.3 Connection to the inverter – Wireless ................................... 50
Chapter 5 APP Interface ......................................................................... 54
5.1 Overview .............................................................................. 54
5.2 Main Menu ............................................................................ 54
5.3 Running Data........................................................................ 55
5.4 Settings ................................................................................ 56
5.4.1 Inverter Parameters ............................................... 57
5.4.2 Read/Write Register .............................................. 58
5.4.2.1 Commands ................................................ 59
5.4.2.2 Enable/Disable........................................... 62
5.4.2.3 Protect ....................................................... 63
5.4.2.4 LVRT/HVRT ............................................... 67
5.4.2.5 Active Power Derating ................................ 71
5.4.2.6 Reactive Power Derating ............................ 73
5.4.2.7 Others ........................................................ 76
5.4.3 Fault Recording .......................................................... 78
5.4.4 Firmware Upgrade ..................................................... 78
5.5 History .................................................................................. 82
5.6 Turn ON/OFF ....................................................................... 82
Chapter 6 Fault Shutdown and Troubleshooting ................................. 84
6.1 LED Fault and Troubleshooting ............................................ 84
Chapter 7 Product Maintenance ............................................................ 93
7.1 Check Electrical Connections ............................................... 93
7.2 Clean the Air Vent Filter ....................................................... 93
7.3 Replace the Cooling Fans .................................................... 93
7.4 Replace the Inverter ............................................................. 95
Chapter 8 Technical Data ....................................................................... 98
Chapter 9 Limited Warranty ................................................................... 103
1
Before You Start…
This Installation and Operation manual contains important information, safety
guidelines, detailed planning and setup information for installation, as well as
information about configuring, operating and troubleshooting the
CPS SCH100KTL-DO/US-600 and CPS SCH125KTL-DO/US-600
Utility Grid-tied PV Inverters. Be sure to read this manual carefully before
using.
Thank you for choosing a CPS Grid-tied PV Inverter. This PV Inverter is a
high performance and highly reliable product specifically designed for the
North American Solar market.
Installation, commissioning, troubleshooting, and maintenance of the inverter
must be done only by qualified personnel. If you encounter any problems
during installation or operation of this unit, first check the user manual before
contacting your local dealer or supplier. This user manual is applicable for the
following models:
CPS SCH100KTL-DO/US-600 and CPS SCH125KTL-DO/US-600
Instructions inside this user manual will help you solve most installation and
operation difficulties. Contact your local supplier if the problem still exists.
Please keep this user manual on hand for quick reference.
2
Chapter 1 IMPORTANT SAFETY INSTRUCTIONS
(SAVE THESE INSTRUCTIONS)
Please read this user manual carefully before product installation. CPS
reserves the right to refuse warranty claims for equipment damage if the user
fails to install the equipment according to the instructions in this manual.
Warnings and symbols in this document
DANGER:
DANGER indicates a hazardous situation which, if not avoided, will
result in death or serious injury.
WARNING:
WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION:
CAUTION indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
NOTICE:
NOTICE indicates a hazardous situation which, if not avoided, could
result in equipment working abnormally or property loss.
INSTRUCTION:
INSTRUCTION indicates important supplementary information or
provides skills or tips that can be used to help you solve a problem
or save you time.
3
WARNING:
All installation and wiring connections should be performed only by
qualified technical personnel. Disconnect the inverter from PV
modules and the AC grid before maintaining and operating the
equipment.
Risk of electric shock and fire. Use only with PV modules that have
a maximum system voltage of rating of 1500V or higher.
Electric shock Hazard. The DC conductors of this photovoltaic
system are normally ungrounded but will become intermittently
grounded without indication when the inverter measures the PV array
isolation.
Shock Hazard. The inverter is energized from both ac and dc
sources. Disconnect all sources before servicing.
For continued protection against risk of fire, replace fuses only with
same type and ratings.
DANGER:
Please disconnect the inverter from AC grid and PV modules before
opening the equipment. Make sure hazardous high voltage and energy
inside the equipment has been discharged.
Do not operate or maintain the inverter until at least 5 minutes
after
disconnecting all sources from DC and AC sides.
NOTICE:
This inverter is designed to connect AC power only to the public grid.
Do not connect the AC output of this equipment directly to any private
AC power equipment.
4
Markings on the product
HIGH VOLTAGE:
This inverter works with high voltages. All work on the product
must only be performed as described in this document.
HOT SURFACE:
The equipment is designed to meet international safety
standards, but surfaces can become hot during operation. Do
not touch the heat sink or peripheral surfaces during or shortly
after operation.
EARTH GROUND:
This symbol marks the location of the grounding terminal, which
must be securely connected to the earth through the PE
(protective earthing) cable to ensure operational safety.
CAUTION:
CPS SCH100KTL-DO/US-600 and SCH125KTL-DO/US-600
inverters
are approx. 55kg (121 pounds). The wire-
box portion of the inverters
are approx. 25kg (55pounds)/ standard wire-box or
15kg (33pounds)/ centralized wire-box;
Please ensure the mounting bracket is properly installed before
hanging
the inverter and wire-box on the bracket.
INSTRUCTION:
Please check with your local electricity sup
ply company before
selecting a
grid standard. If the inverter is operated with a wrong grid
standard, the electri
city supply company may cancel the
interconnection agreement.
Placing
the inverter into operation before the overall system complies
with the national rules and safety regulations is not permitted.
5
Chapter 2 Overview
2.1 Inverter for Grid-tied PV Systems
CPS SCH100KTL-DO/US-600 and CPS SCH100KTL-DO/US-600 3-Phase
String Inverters are designed for use with carport, commercial rooftop, and
large-scale PV grid-tied systems. The system is generally made up of PV
modules, DC power distribution equipment, PV inverter and AC power
distribution equipment (Figure 2-1). The inverter converts the DC from PV
modules to AC with the same frequency and phase as the AC grid. All or part
of the AC power is supplied to local loads, and the surplus power is supplied
to the electricity grid.
Figure 2-1 Grid-tied PV system
2.2 Product Features
High conversion efficiency：Advanced 3-level conversion technology
with SVPWM (Space Vector Pulse Width Modulation); Max. efficiency:
99%；CEC efficiency: 98.5%
Grid adaptability: IEEE 1547, Rule 21, and HECO standards applicable;
Reactive power adjustable; PF value: ±0.8, Remote Curtailment.
Flexible communication: Supports standard Modbus RS485 and
TCP/IP communications to ensure compatibility with 3rd party monitoring
and control systems.
Wide DC input voltage range：Operating DC Input Voltage Range:
860-1450Vdc; Max DC input voltage: 1500V.
6
Long Service Life: Uses thin-film capacitors to extend inverter's
service life.
1 MPPT: 1 MPPT with 16 (100kW) and 20 (125kW) inputs in the
standard wire-boxes for maximum flexibility.
Wire-box option: Standard wire-box enables discrete wiring,
or optional Centralized wire-box for connection of DC combiner boxes.
High protection degree: NEMA 4X enclosure meets the demanding
needs of both indoor and outdoor use.
Intelligent Integration: Integrated load break rated DC/AC disconnect
switches, and up to 20 fused string inputs eliminate the need for external
combiner boxes, simplifying installation.
2.3 Product Protection Functions
Reverse polarity protection of DC input
AC and DC Short circuit protection
Arc-fault detection and circuit interruption
Anti-islanding protection with bi-directional frequency perturbation
DC Input and AC output over-voltage protection
DC Input over-current protection
DC Input insulation against ground monitoring
DC injection of AC output
AC output voltage and frequency monitoring
Leakage current against ground monitoring
External environmental temperature monitoring
IGBT power module temperature monitoring
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