.png)
電
用
光
發
美
好
共
建
How much do you know about photovoltaic safety?
In recent years, household photovoltaics have developed rapidly, but the topic of photovoltaic "safety" is often pushed to the forefront. Photovoltaic "safety" includes two aspects, one is the personal safety of construction personnel during installation, and the other is the safety of photovoltaic systems. Equipment safety (this is also related to the safety of life and property of installation users in the future). Safety is no trivial matter. From installation and construction to later operation and maintenance, it is necessary to pay attention to it at all times. It is necessary to eliminate possible safety hazards in time.
Xiaozhi excerpted some "safety common sense" from the training courseware of engineering technology. As a photovoltaic practitioner, you need to have an in-depth understanding and mastery, and the "safety" alarm bell always rings!
.jpg)
Component Security Knowledge
1. safety precaution label
WARNING: Read and understand all safety instructions before installing, wiring, operating and/or maintaining components.
Direct current is generated when components are exposed to sunlight or other light sources. Direct contact with live parts of components may result in electric shock to persons.
Use protective equipment (gloves, work clothes, etc.) to avoid direct contact with live parts, and avoid direct contact with sharp edges during installation to protect the personal safety of construction workers.
Pay attention to the safety of components during transportation, handling and installation.
2. component installation
a. It is best for two people to carry the components together, and try to avoid single person handling
b. When temporarily storing, stand on the side to avoid laying flat (flat laying is prone to uneven force.)
c. Do not stand or step on the module, otherwise the module may be severely cracked due to local high load, which will affect the long-term reliability of the module.
d. Ensure that the DC voltage of the module array is within the range that the inverter can withstand.
e. Thermal expansion effects should be considered and the minimum clearance between components is 10mm.
Inverter safety knowledge
1. Inverter common power safety signs
2. Safety instructions and warnings
a. The inverter must be installed and maintained by professionals in accordance with local standards and regulations.
b. Before installing and maintaining the inverter, the DC input and AC grid must be disconnected from the inverter, and the inverter must not be touched for at least 5 minutes to prevent electric shock .
c. The local temperature of the inverter may cause high temperature, please do not touch it to avoid burns.
d. All electrical installations must comply with local electrical standards, and only with the permission of the local power supply department can the inverter be connected to the grid by professionals.
e. In the case of unauthorized, please do not open the top cover, do not touch or replace other components except the terminals, otherwise it will cause harm to people and the inverter.
f. Make sure that the DC input voltage is less than the maximum input voltage of the inverter, otherwise the inverter will be damaged.
g. When the inverter is working, it is forbidden to plug and unplug the DC and AC connectors.
h. It is strictly forbidden to ground or short the positive and negative poles of the PV string, otherwise the inverter will be seriously damaged.
3. inverter installation
a. The installation of the lower line of the inverter is 1.8 meters away from the ground, which is convenient for operation and maintenance.
b. The inverter should be installed away from inflammable and explosive materials and ensure that there is no strong electrical interference equipment around.
c. Avoid sunlight, rain and snow when installing the inverter.
Distribution box safety knowledge
The grid-connected distribution box is mainly composed of a box body, a knife switch, an air switch, a surge protector, a self-reset overvoltage and undervoltage protector, and a grounding busbar. Play the role of protecting the photovoltaic system. Electrical safety needs to pay attention to the following:
Other safety knowledge of photovoltaic construction
1. Wear insulating shoes, gloves and insulating tools during construction.
2. Avoid working in rainy and humid weather.
3. In case of extreme weather such as strong wind, heavy rain, heavy snow and heavy fog, stop outdoor work immediately.
4. Avoid installing male and female headers with power on.
5. The construction site of the household photovoltaic system is generally on the roof. Such as seat belts, anti-fall rope.
× 錯誤 _cc781905- 5cde-3194-bb3b-136bad5cf58d_ _cc781905-5cde-3194-bb3b -136bad5cf58d_ _cc781905-5cde -3194-bb3b-136bad5cf58d_× error
WARNING: Serious injury or death and equipment damage may result if not followed correctly.
The surface temperature of the inverter may reach 75°C. Avoid contact with the surface of the inverter when it is working, otherwise it may cause burns.
RISK OF ELECTRIC SHOCK! DO NOT REMOVE THE COVER! A qualified electrician is required for overhaul.
Electric shock warning instructions, if not followed correctly, may result in electric shock to persons.
During installation, do not modify other parts of the chassis except for the wiring terminals.
When installing, cut off the power switch. If it is not cut off, there may be a danger of electric shock.
When using it, prevent it from being touched by human hands. If it is damaged, cut off the power supply and replace it. Do not operate it with electricity.