Contributed by: Suraj Kumar HS 280V Vs 320V AC SPD Introduction Surge Protection Devices (SPDs) are devices that are used to protect electrical equipment against transient over voltage (TOV). TOVs often come from one of three places: the grid side (like in a load-shedding situation or switching at the local substation), or the load [...]
For solar rooftop installations, it's often unnecessary to install new AC earth pits. Existing AC earth pits, if designed properly to handle fault current, are usually sufficient. In a solar setup, the overall AC current in the circuit doesn't increase. Before solar, if 10A flowed in the AC circuit, the entire 10A came from the [...]
In certain cases, there would be a variation in the tilt angle of solar panels at a single site itself due to unevenness of the roof, solar arrays spread across multiple roofs, curvature of barriers, uneven cement patches and to avoid shadows from adjacent solar tables and walls. In such cases, customers can raise the [...]
We get questions from clients about oversizing of inverters and why we are connecting more panels to an inverter - like connecting 33 kWp of panels to a 27.6 kVA inverter. Isn't this inefficient or a wastage of solar panels? Let's say that we are using 380Wp panels. The panel is rated 380Wp under STC [...]
Technically Yes. All earthing pits should be bonded together so that there is equipotential bonding amongst them thus preventing back-feed from earth. However, some DISCOMs insist that DC earthing pits, AC earthing pits and LA pits should be kept separate. Please have a read of Legrand's Protection against Lightning Effects guide (Page 8) which [...]
With highly sensitive electrical and electronic components in solar installations, the need for protection of these costly equipment against fault and lightning current is very much necessary. Electrostatic discharge can damage sensitive electronic equipment and disturb the solar power supply. Any voltage difference between individual electronic units can destroy valuable equipment. In addition, noise [...]
At EcoSoch, we use UPVC conduits on the rooftop for a reason whether it be residential, apartment, commercial, industrial or institutional projects as shown below: However, the current norm of other EPC vendors is to use perforated Pre-GI cable trays to carry the DC cables for large projects as shown [...]
DC Voltage Drop For Solar PV installations, the standard to follow would be from Australia called AS/NZS 5033:2014. It states, "For LV PV arrays under maximum load conditions (Imp), the voltage drop from the most remote module in the array to the input of the inverter should not exceed 3% of the Vmp voltage [...]
Please have a read of the below article from Nuevosol which talks about corrosion in Pre-GI and Hot Dip Galvanised (HDG) Structures. Salient points are as below: Nuevosol article Pre-GI can be used as long as it is 550 GSM steel. The galvanization coating thickness is a maximum of 20 micron each side for [...]
Basics A CAT6 cable can theoretically carry data for 100m but after 80m, there would be signal attenuation and it would be impractical. So 80m is the practical limit for CAT6 cables. An RS485 cable can carry data upto 4000ft (or 1.2km) @ 100kbps as shown below. If you need more information on the [...]
