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Shanghai Qiaoyi Electrical Equipment Co., Ltd

E-mail
1601815388@qq.com
Phone
18916668862,13764606508
Address
Room 411, No. 22, Lane 688, Jiaqian Road, Nanxiang Town, Jiading District, Shanghai

Photovoltaic DC distribution cabinet

NegotiableUpdate on 08/13

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

1、 Product Overview: Photovoltaic DC distribution cabinets are mainly used in large photovoltaic power stations to connect combiner boxes and photovoltaic inverters

Product Details

1Product Overview:
Photovoltaic DC distribution cabinets are mainly used in large photovoltaic power stations to connect combiner boxes and photovoltaic inverters. And provide lightning protection and overcurrent protection, monitor the photovoltaic arrayThe single string current, voltage, and lightning arrester status of the column, as well as the short-circuit status. Professional electrical design and component selection can ensure long-term stable operationOur professional large-scale screen cabinet production factory and unique production technology ensure reliable and durable box structure, safe, simple, and beautiful internal wiring, which is convenient forOn site wiring and maintenance.

IIProduct features:
Adopting high-performance components and intelligent design. It has many advantages such as high cost performance ratio, beautiful appearance, and easy installation and use. Can detect each circuit of electricityCurrent, voltage, lightning protection status, switch status, etc. are displayed on the large LCD screen of the intelligent instrument, and voltage, current, and power are displayedRS485Communication interface and monitoring system communicationRealize intelligent management of DC distribution cabinets.

Modular design, using high-performance Hall sensors for data acquisition;

Adopting a large screen LCD display intelligent instrument, it can collect up to16Circuit current and output voltage, LCD display of voltage, current, power, lightning protection status, switch status and other information, with standardRS485Connection between digital communication interface and monitoring system;

Surge Protective DeviceN+1Adopting internationally or domestically renowned products(For example:DEHN、PHEONIX、CITEL).

The anti reverse diode adopts modular rectifier diodes, with low power consumption and stable performance.

The internal wiring is reasonable, the layout is beautiful, and all internal connections are connected with bronze plates;

Lightning protection grounding meets the technical requirements of lightning protection standards.

3、 Main technical parameters:

Model specifications	JTPV-D
Maximum voltage	1000V DC
Branch Current	customizable
Input power	≤500KW
protection grade	IP30
ambient temperature	-25℃～+80℃
ambient humidity	0～99%
Width x Height x Depth	800㎜×2200㎜×600Mm (customized)
Box material	Cold rolled steel plate/stainless steel
communication model	RS485/wireless/carrier wave
Power supply mode of measurement and control module	220VAC/24VDC

4、 Product execution standards

GB/T14048.1-2000 General principles for low-voltage switchgear and control equipment.

YD/T1235.1-2002 Communication Industry

IEC61024-1-1:1993The first part of building lightning protection is the determination of the protection level of lightning protection devices.

QX10.1-2002 Meteorological Industry of the People's Republic of China

GB50057-1994 design code for protection of structures against lightning

YD5098-2001 Design Specification for Lightning Overvoltage Protection of Communication Bureaus (Stations)

YDJ26-89 Provisional Technical Regulations for Grounding Design of Communication Bureau (Station) (Comprehensive Building Part)

YD5078-98 Technical Regulations for Lightning Protection of Communication Engineering Power Supply System

YD/T950-1998 Technical requirements and experimental conditions for overvoltage and overcurrent protection of telecommunications switching equipment

5、 Structural wiring and component selection of photovoltaic array DC box

5.1structure

（1）The cabinet is made of high-quality cold-rolled steel plate, and the surface is coated with electrostatic spraying. All the metal of the cabinet has undergone special anti-corrosion treatment.

The cabinet has sufficient mechanical strength to ensure that there is no shaking or deformation during component installation and operation. Through seismic testingSwing experiment and internal arc burning experiment.

（2）Flexible and convenient door opening.

5.2 wiring

(1) Reasonable arrangement of cable trays inside the cabinet: separate cable trays for strong and weak electricity. Control signal lines to be routed separately through cable trays.

(2) All wires introduced from outside the cabinet pass through the wiring terminals. The creepage distance and leakage gap between high current terminals, general terminals, and weak current terminals comply with relevant national standards. The terminal block design is reasonable, corresponding to the position of electrical components, and the size is matched with the connected cables. It is clear and easy to operate, maintain, and debug.

5.3 Main component selection

(1) The selection, wiring, and installation of electrical clearances, creepage distances, spacing distances, and external wire terminals all comply with the relevant provisions of GB 7251.

(2) The components installed in the cabinet are all high-quality devices, with wires, wire colors, indicator lights, and paint that comply with current national or industry standards and regulations.

(3) The plug-in of similar components used in the equipment has universality and interchangeability, reliable contact, and easy insertion and removal. The contact resistance, insertion and extraction force, allowable current, and lifespan of the connectors comply with the current national and industry standards.

6、 System reliability analysis

The photovoltaic array combiner box device is composed of multiple units connected in series, parallel, and other ways. To improve its reliability, it is necessary to first improve the reliability of each component, and on this basis, optimize the system design.

(1) Components are the smallest unit of components and the starting point of reliability design. When selecting and using components, reliability considerations must be taken into account, which is crucial for improving the overall system reliability. The following measures are taken to enhance reliability:

Component aging treatment;

Selection of components;

Reduced capacity use of components;

(2) Improve unit reliability

Adopting high reliability microcomputer power supply

The fluctuation of the power supply itself and various interferences entering the system through the power supply have a particularly serious impact on the system. Therefore, the power supply system must be very reliable to ensure that even if other parts of the system fail, the power supply can still work normally. High performance switching power supplies should be used, and some power supplies should be redundantly processed if necessary.

Lightning protection can be added to the power input terminal.

Good grounding

Protective grounding refers to the grounding of cabinets and internal components. If the internal components have poor contact with the cabinet, they should be connected to the cabinet with copper tape, and the cabinet can also be connected to the ground with copper tape. The grounding cable (copper strip) should be connected by welding. If the internal circuit needs to be grounded, it needs to be grounded separately.

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