Why is a DC Disconnect required in a S1 solar pumping system?
A DC Disconnect is essential for ensuring the safety of solar pump systems. It allows you to:
- Safely isolate the photovoltaic (solar) power source during installation or servicing.
- Disconnect the power in emergency situations, protecting both personnel and equipment.
Requirements for installing a DC Disconnect in a S1-700 solar pumping system
The switch must be installed between the PV generator and the controller. It must meet the following requirements:
- Minimum voltage rating: 220 V DC.
- Continuous current rating: Equal to or higher than the maximum current of the connected PV generator.
- DC specific design: The switch must be rated for DC, not AC.
Additionally, the DC Disconnect must comply with IEC/EN 60947-3 standards to ensure safe isolation of the pump controller.
TheS1-PV Disconnectis a DC disconnect switch that meets all of the above requirements.
What is a S1-PV Disconnect?
The S1-PV Disconnect is a DC disconnect switch designed to safely interrupt the power flow from the PV generator under load conditions. It acts as a critical safety component in the solar pumping system. Its simple and user-friendly design makes installation easy, as it comes equipped with compatible MC4 connectors for direct connection to the PV Generator and the S1-700 Controller.
The S1-PV Disconnect is specifically designed to meet all required standards, offering a reliable and safe solution for S1 solar pumping systems.
| LORENTZ Item number | Description |
| 19-005690 | S1 PV Disconnect with fixed MC4 connectors and 0.5 m [1.6 ft] cable |
WARNING
The controller’s On/Off switch is a functional switch and does not disconnect power. To ensure safe isolation of the pump controller, a S1-PV Disconnect switch complying with IEC/EN 60947-3 and rated at 220 V DC and 30 A DC must be installed.
