1500V DC Surge Protective Device

The SYS5-40P 1500V DC surge protective device, supplied by China-based manufacturer Zhejiang Soutya New Energy LLC, is a 500–1500 V DC, T2-class SPD with 40 kA maximum discharge current and ≤5.2 kV voltage-protection level, featuring a fail-safe thermal disconnect and change-over remote signalling contact for SCADA integration, engineered for surge immunity in utility-scale PV arrays, containerized BESS and high-power EV charging infrastructure.

Application scenarios

1.Utility-scale 1500 V solar farms

Inside the DC cabinet of 3.3 MW inverter stations, one SPD per MPPT input protects against direct and indirect lightning. The 5.2 kV protection level meets 6 kV insulation coordination, while the remote-contact output feeds the plant SCADA for centralized surge monitoring.

2.Containerized BESS (2–5 MWh)

On the 1200–1500 V battery cluster bus, the SPD is rail-mounted beside fuses; its thermal disconnect dry-contact is looped into the PCS emergency-stop circuit, instantly blocking the converter if the SPD fails and preventing arc propagation.

3.1500 V ultra-fast charging hubs ≥360 kW

Both the rectifier cabinet 1500 V bus and the 1000 V battery swap truck circuit are paralleled with SPDs, limiting 2 kV/µs steep-front surges from high-power contactors and safeguarding 1700 V IGBT modules.

4.Agro-PV tracker systems in mountainous terrain

Tracker motor feeders (1000 V) run alongside 1500 V strings for long distances; the SPD, installed in the tracker junction box, prevents induced surges from coupling into the strings and avoids PID and combiner-box insulation breakdown.

5.Offshore PV booster platforms

In the topside 1500 V DC collection panel, nickel-plated copper terminals with anti-salt-spray coating are used. The remote signal is converted via fibre-optic to the onshore control centre, enabling real-time surge-status monitoring 40 km from shore.

Technical Parameter

Note:T2 category SPD is primarily used in the main incoming cabinets of distribution systems.

Accessory device

Failure Isolation Device

The surge protector is equipped with a failure isolation protection device. When the protector breaks down due to overheating, this device can automatically disconnect it from the power grid while providing an indication signal. When the protector is functioning normally, the indicator window displays green; after failure isolation, the window displays red.

Alarm Remote Signal Device

The protector can be manufactured with remote signal contacts. This device includes a set of normally open and normally closed contacts. When the protector is functioning normally, the normally closed contact is engaged. If one or more modules of the protector fail, the contact will switch from normally closed to normally open, activating the normally open contact to send out a fault signal.

Wiring Diagram

Appearance and Installation Dimensions