When installing a photovoltaic installation, it is worth remembering to appropriately select additional devices, such as a switch or switchgear. A DC (Direct Current) switch is an important element in a photovoltaic system that allows you to disconnect or disconnect solar panels from the rest of the installation. When is it worth choosing it and what should you remember when choosing?
Check out DC disconnectors at the Onninen wholesaler
When is it worth choosing a DC disconnector for photovoltaics?
A direct current disconnector for photovoltaics, also known as a DC disconnector, is designed to disconnect the direct current power source, e.g. in emergency situations, such as the need to perform maintenance on the device. Thanks to this, there will be no need to turn off the entire system and the risk of a dangerous situation will be eliminated. Switches are designed to control and manage the photovoltaic system, enabling it to be turned off and on, as well as protecting against overloads. If any failure occurs in the system, the DC disconnect allows the current to be immediately interrupted, which protects the devices and installation. The ability to disconnect the power supply before starting e.g. repair work will facilitate quick removal of a photovoltaic installation failure. When choosing a DC switch for photovoltaics, you must always remember to choose a switch that meets the standards and requirements for electrical safety. Choosing the right switchgear for the DC disconnector will also be important.
How to choose the right switchboard for a DC disconnector?
DC switchgear is a key element of power-supplied systems. It acts as a central point for management and distribution of direct current in a given installation, ensuring reliable and safe power supply for devices operating on direct current. Advanced DC switchboards are equipped with monitoring and control systems that allow you to supervise the status and performance of the system. Switchboards are designed in various configurations and sizes, so they must be adapted to the needs and size of the installation. It is worth choosing DC switchboards from reputable manufacturers, which are high quality, reliable and compliant with the latest industry standards. For a photovoltaic installation to be properly protected, it should always contain two switchboards, both DC and AC. They must be in the right places and fit well to the DC switches. The DC switchgear should be waterproof, dustproof and installed in special housings with a high IP rating, e.g. IP65. The choice of switchgear also depends on the installation power and MPPT. To properly match the switchgear to the disconnector, it is worth using the help of a specialist who will advise which switchgear will work best.
DC disconnectors in the Onninen wholesaler
The switches are primarily intended to ensure the safety of the photovoltaic installation. That's why it's so important to buy them only from reputable manufacturers to ensure that the device will be certified and meet the highest quality standards. The switch must be durable, reliable and efficient to ensure the best protection of equipment. Proven disconnectors can be found, among others, in the assortment of the Onninen installation wholesaler . Recommended disconnectors include devices from Jean Mueller Polska, which specializes in the production of high-quality electrotechnical devices.
For example, the Jean Müller 10X38 Z10-TL2/DC 1000V/EWK.GPV fuse switch disconnector has a rated voltage of up to 1000 V DC, which makes it ideal for use in photovoltaic systems and other applications requiring operation at high direct voltage. Additionally, the small size of the disconnector also makes it easy to install even in places with limited space. This model of the disconnector has an IP20 tightness class and an IK08 protection level - thanks to this, it is resistant to mechanical damage and protects against access by unauthorized persons.
Schneider Electric switch disconnectors also enjoy a good reputation, e.g. the 2-pole model Schneider Electric DC C60NA-DC-50 DC disconnector , which is characterized by high quality of workmanship, effective protection against dust and moisture and excellent technical parameters, and is additionally easy to use and assembly. The device can be used safely even under heavy loads, and thanks to the forced opening function of the contacts, it is possible to quickly and safely disconnect the device in the event of a failure.
The third recommended switch model is the 4-pole DC ETI PV switch , designed specifically with the safety of photovoltaic installations in mind. The device has four poles and is permanently mounted in switchboards. Its solid construction guarantees reliability and durability for a long time of use.