Schneider Electric has launched the Square D 1000 VDC disconnect switch, the first enclosed heavy-duty 1000 VDC solar disconnect on the market. The easy-to install switch functions as a local disconnect for a string of Photovoltaic (PV) panels and are designed for an extended life expectancy in harsh environments.
Problem: Commercial and utility-scale PV power plants are increasingly using higher voltages in order to improve overall plant efficiency. Systems up to 1000 V are becoming more popular. However, contrary to AC which has two zero crossings per cycle (16.6 ms)
DC current is more difficult to interrupt. When a DC circuit is in the open position an arc is generated between the switch contacts, this arc must be broken as fast as possible and in accordance with safety procedures.
Try Premium for just $1
- Full premium access for the first month at only $1
- Converts to an annual rate after 30 days unless cancelled
- Cancel anytime during the trial period
Premium Benefits
- Expert industry analysis and interviews
- Digital access to PV Tech Power journal
- Exclusive event discounts
Or get the full Premium subscription right away
Or continue reading this article for free
Solution: Suitable for both grounded and ungrounded PV systems, the Square D 1000 VDC disconnect switch offers a preconfigured solar solution and familiar enclosed safety switch design, with no additional components required. The extended life expectancy exceeds IEC 60947-3 mechanical endurance requirements by a factor of 18 and IEC 60947-1 electrical endurance requirements by a factor of 10.
Applications: Commercial and utility-scale PV power plants.
Platform: The NEMA Type 3 and IP63 enclosure is resistant to windblown dirt and dust and exceeds NEMA type 3R. It operates within a temperature range of -37°C to 50°C, using a white enclosure that can reduce solar gain by up to 35% over standard grey enclosures.
Availability: The Square D 1000 VDC disconnect switch is available now through regular Schneider Electric distribution channels.
