Background While small solar panels used for battery charging and similar tasks may not require special connectors, larger systems normally connect the panels together in series to form strings. In the past this was accomplished by opening a small electrical box on the back of the panel and connecting user-supplied wires to screw terminals within. […]
Application L1 Series DC Isolator Switch is applied to 1-20KW residential or commercial photovoltaic system, pleced between photovoltage modules and inverters. Arcing time is less than 8ms, that keeps solar system more safe. To ensure its stability and long service life, our products are made by components with optimum quality. Max voltage is up […]
How to choose the right surge protector? Choosing the right surge protective device (SPD) and protective circuit breakers involves considering a wide range of parameters related to types of SPDs, circuit breaker arrangements, and risk assessment. Three rules of thumb for choosing surge protection Now that we’ve established that SPDs should be at the heart […]
The components of a SPD The SPD chiefly consists of (see Fig.1): 1) one or more nonlinear components: the live part (varistor, gas discharge tube, etc.); 2) a thermal protective device (internal disconnector) which protects it from thermal runaway at end of life (SPD with varistor); 3) an indicator which indicates end of life of […]
ommon mode SPD between phase and PE or phase and PEN is installed whatever type of system earthing arrangement (see Fig. 1). The neutral earthing resistor R1 used for the pylons has a lower resistance than the earthing resistor R2 used for the installation. The lightning current will flow through circuit ABCD to earth via […]
The system for protecting a building against the effects of lightning must include: =protection of structures against direct lightning strokes; =protection of electrical installations against direct and indirect lightning strokes. The basic principle for protection of an installation against the risk of lightning strikes is to prevent the disturbing energy from reaching sensitive equipment. To […]
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