The Citel DS210DC series is designed to protect 12V, 24V, 48V and 150V DC power lines for an off-grid PV system. The maximum voltage should not be exceeded in any conditions. Use the next higher rated unit if necessary. The surge protectors protect the charge controller and other system electronics. DS210DC automatically reset after each lightning surge or electrical transient. These surge arrestors clamp at much lower voltage than Delta surge arrestors at left so they offer much better protection for charge controllers and inverters in low-voltage DC systems.
The DS50PV is designed to protect the solar array at the solar PV array combiner box for a utility-interactive PV system. The DIN mount DS50PV is designed to withstand 40 kA (8/20us) induced transient surges and has replaceable modules. Use the DS50PV-600 for systems with inverters that have an upper limit of up to 600 VDC.
The DS60PV series are Type 1 heavy duty surge protectors, recommended when a direct lightning strike is possible. They are available in 500 and 1000 VDC operating voltages. The use of a Type 1 surge protector is recommended at both ends of the DC power supply line (solar array side and inverter/converter side). The DS60PV is made as a monoblock and mounts on the DIN rail.