What is SPD in solar?
In case of surge, the SPD acts as a switch that turns off the normal operation of system. ... The SPD used particularly in solar power plant is of type 2. This type of SPD is specifically to ground any surge arising from indirect lightning. These SPD's are installed on both DC and AC sides in the solar power plant.
A SPD (as shown below ) is used to limit the over voltage and surge currents or both. They are generally connected in parallel to the system they are intended to protect. ... These SPD's are installed on both DC and AC sides in the solar power plant
What is Surge protector ?
A surge protector or surge suppressor is an appliance or device designed to protect electrical devices from voltage spikes. A surge protector attempts to limit the voltage supplied to an electric device by either blocking or shorting to ground any unwanted voltages.
What does SPD stand for in electrical?
Surge Protective Devices
Surge Protective Devices (SPD) are used to protect the electrical installation, which consists of the consumer unit, wiring and accessories, from electrical power surges known as transient overvoltages.
How does a SPD work?
At normal operating voltages, the SPDs are in a high-impedance state and do not affect the system. When a transient voltage occurs on the circuit, the SPD moves into a state of conduction (or low impedance) and diverts the surge current back to its source or ground.
How do I choose a SPD for my solar system?
The number and location of SPDs on the DC side depend on the length of the cables between the solar panels and inverter. The SPD should be installed in the vicinity of the inverter if the length is less than 10 metres.
Where do I put SPD devices?
In an electrical systems, surge protection devices (SPDs) are usually installed in tap-off configuration (in parallel) between the live conductors and the earth. The operating principle of SPD can be similar to that of a circuit breaker.
There are three different types of Surge Protective Devices: Type 1 SPD installed at the origin, e.g. main distribution board. (Combined Type 1 & 2 SPDs are available and are usually installed in consumer units)
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