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Photovoltaic dc power distribution ark is mainly applied in large photovoltaic power station, used to connect confluence box and photovoltaic inverter. And provide lightning protection and over current protection, monitoring photovoltaic array of single series of current, voltage and the lightning protection device state, breaker state. Professional electrical design, component selection, can guarantee the stability of the long time work, the company specializing in the large screen ark manufacturer and unique production process, to ensure the reliable and durable box structure, safe, simple and elegant internal wiring, facilitate field wiring and maintenance.
The product features:
Using the high performance components, intelligent design. Has the high ratio of performance, appearance beautiful, installation is convenient to use and many other advantages. Every road can detect the current, voltage, lightning protection status, switch state, through intelligent instrument DaBing liquid crystal display voltage current power, through the communication interface RS485 communication and monitoring system, realize dc power distribution ark intelligent management.
Modular design, by high performance hall sensors to collect; The DaBing liquid crystal display of intelligent instruments, collecting and as many as 16 road current and output voltage, liquid crystal display voltage, current, power, lightning protection status, switch the information such as the state, has the standard RS485 digital communication interface and monitoring system connection; Surge protector N + 1 adopt international or domestic famous products (for example: DEHN, PHEONIX, CITEL). Counter-attack diodes using modular rectifier diode, low power consumption, stable performance. Internal wiring reasonable, layout and beautiful, the internal links have use bronze link; Lightningproof grounding accord with lightning protection standard technical requirements.
Three, main technical parameters:
| Type specification | TQ-DC1000v |
| Maximum voltage | 1000V DC |
| Branch current | customizable |
| The input power | ≤500KW |
| Protection class | IP30 |
| Environmental temperature | -25°C~+80°C |
| Environment humidity | 0~99% |
| Wide X high X deep | 800mmX2200mmX600mm (customization) |
| The material | cold rolled steel plate/stainless steel |
| Communication | RS485/wireless/ carrier |
| Measurement and controlof rubber power supply way | 220VAC/24 VDC |
Four, product standards
GB/T14048.1-2000 low pressure switch equipment and control equipment conditions. YD/T1235.1-2002-1-IEC61024 communication industry "93 building lightningproof first part of lightning protection equipment protect grade sure. QX10.1-2002 Peoples Republic meteorological industry GB50057-1994 building lightningproof design code YD5098-2001 communications agency (dca) (station) lightning overvoltage protection design standard YDJ26-89 communications agency (dca) (station) grounding design interim technology rules (building part) YD5078-98 communication engineering power system technology YD/lightning protection provisions T950-1998 telecom over current protection against overvoltage switching equipment technical requirements and experimental conditions
Five, and photovoltaic array dc box structure cabling and components selection
5.1 structure (1) cabinet put oneself in anothers position with the use of high quality cold-rolled steel plate, and the surface of the electrostatic spraying, cabinet put oneself in anothers position of all metal entered special anticorrosive processing. The cabinet has enough mechanical strength, ensure component installation and operation after no shaking and deformation. Through the experiment, experiment and seismic swing internal combustion arc experiment. (2) open the door flexibly and conveniently.
5.2 wiring which components installation and go line in reliable, decorate reasonable, electrical insulation intensity between meet the national standards, the table below:
| The rated voltage Un (V) | experiment voltage U (V) |
| ≤60 | 500 |
| >65~125 | 1000 |
| >125~250 | 1500 |
| >250~500 | 2000 |
| >500 | 2Un+1000 |
(1) which reasonable decorate trough: high voltage, low separate go trough. Control signal lines go trough alone. (2) by introducing the ark of all wires lead after terminals. Large current terminals, general terminals, low between terminals of creepage distance and leakage clearance in compliance with relevant national standards, terminal row design is reasonable, and electrical components corresponding position, size and by supporting the cable, clear, operation, maintenance and convenient debug.
5.3 the main component selection (1) electric clearance and creepage distance, interval distance, external wire terminals choice, connection, such as the installation of the relevant provisions of the GB7251 are satisfactory. (2) the components are installed in which USES the high quality components, wire, wire color, lights, paint, which conform to the national or trade standards relevant existing regulations. (3) equipment used in the same components of the plug is versatile and interchangeability, contact with reliable, inserted convenient. Connectors of the contact resistance, insertion force, allow current and life, which conform to the relevant countries and industry the current standard requirements.
Six, system reliability analysis
Photovoltaic array box by multiple units confluence device by series, parallel form etc, improve its reliable must first improve the reliability of the various components, and based on this, and the system optimization design. (1) element is a part of the smallest unit, is the starting point of the reliability design, in choosing and using elements from the test reliability must be Angle consideration, this to raises the whole system reliability is very important, use the following measures to improve reliability:
Components aging treatment; The choice of components
Components of the drop let use; (2) improve reliability using high reliability unit computer power supply power supply itself of the fluctuation of the power supply into the system and various kinds of interference on the influence of the system especially serious, so you have to be very reliable power supply system, to ensure that even if the other parts of the system failure power also normal work, the high performance of switch power supply, when necessary, deal with some power be redundant processing. The power input lightning protection can be added. Good grounding protection grounding is refers to the cabinet and internal components grounding, if internal components and the cabinet contact is not good, should be bronze with the connected with cabinet, cabinet can also copper belt and connected. Grounding cables (copper belt) appropriate USES welding way connection. If you need the circuit inside the ground, it is required to use separate grounding.
Photovoltaic dc power distribution ark