| Model: |
Price: |
| 8937203 |
$129 |
Square-D 240V and 600V NEMA
3R Safety Switch Disconnect
Square-D240V and 600V NEMA 3R Safety Switch Disconnects. According to the National Electric Code, section 690.15, PV arrays must have a disconnecting means to isolate the inverter from the PV power source. Utility grid-tie inverters that utilixe PV arrays with voltages above 250VDC require a disconnect rated for 600VDC to perform this function. The Square-D 600VDC 30-amp 3-pole safety switches are UL Listed to handle 12A a 600 VDC per pole. They can be used for disconnecting up to three PV arrays for three grid-tie inverters. It has wiring lugs that are rated to accept two #14 to #10 wires in each lug.
This allows the disconnect switch to also act as a string combiner in systems that utilize two strings of PV modules per inverter. The 600VDC 60-amp 3-pole safety switches are UL Listed to handle 38A at 600VDC per pole. All other Square-D 600 VDC disconnects are rated for disconnecting one string at full rated power.
Many utilities require an AC disconnect between a grid-tie inverter and the AC load center, close to the AC service entrance, with a visible and lockable handle. A 30-amp 240-volt disconnect is good for up to 5kW at 240VAC and the 60-amp disconnect is good for up to 11kW. For connection of multiple inverters to one of these disconnects, use an AC load center, with a circuit breaker for each inverter installed, as an AC combiner box between the inverters and the disconnect switch. The breakers can be back-fed with the inverter outputs and the load center main lugs will handle the combined outputs to be connected to the AC disconnect.
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