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P-Series SPD
The P-Series Power Supply Surge Protective Device (SPD) is a high-performance safety component engineered for electrical system engineers, facility management teams, and industrial power distribution operators seeking reliable protection for critical electrical infrastructure. Designed in strict accordance with IEC and GB standards, this industrial-grade SPD diverts harmful surge currents to an equipotential bonding system during surge events, limiting voltage to safe levels to safeguard sensitive electrical equipment. With up to 40kA surge protection capacity, intuitive fault indication, remote monitoring interfaces, and hot-swappable design, it ensures the safety, stability, and maintainability of mission-critical power systems.
This industrial surge protective device for power distribution delivers robust lightning and surge protection, with a maximum discharge current of up to 40kA (8/20μs waveform) across the range. It features ultra-low voltage clamping levels: <600V for 24V DC systems, <1.2kV to <1.7kV for 220V AC systems, minimizing voltage stress on sensitive power electronics and preventing irreversible equipment damage from surge events.
With a <25ns ultra-fast response time, this 40kA surge protection device for critical power systems reacts to surge events in nanoseconds, clamping overvoltage before it reaches protected equipment. It boasts ultra-low leakage current (<20μA for AC models, <10μA for DC models), eliminating standby energy waste and ensuring no interference with the normal operation of the power distribution system.
Built-in overcurrent protection and 1000A short-circuit tolerance eliminate the need for external disengagement devices, enhancing system safety. It features intuitive local fault indication and a standard remote signalling interface (250VAC/0.5A, 24VDC/0.5A), enabling real-time status monitoring in centralized control systems, rapid fault localization, and reduced maintenance response time.
The SPD supports both rail-mounted and base-mounted configurations, compatible with 4-25mm² connection wires for diverse on-site installation needs. Its innovative hot-swappable design allows module replacement without full system power outages, drastically reducing downtime during maintenance and ensuring continuous operation of critical power systems.
Parameter | P-320-20-L2 / P-320-20-L4 | P-385-40-L2 / P-385-40-L4 | P-60-40-L2 |
Nominal operating voltage Un | 220V AC | 220V AC | 24V DC |
Max. operating voltage Uc | 320V AC | 385V AC | 90VDC / 60VAC |
Nominal discharge current In (8/20μs) | 10kA | 20kA | 20kA |
Max. discharge current Imax (8/20μs) | 20kA | 40kA | 40kA |
Voltage protection level Up | <1.2kV | <1.7kV | <600V |
Response time | <25ns | <25ns | <25ns |
Leakage current | <20μA | <20μA | <10μA |
Over current protection | 40A gG | 80A gG | 80A gG |
Short circuit tolerance | 1000A | 1000A | 1000A |
Remote communication interface | 250VAC/0.5A, 24VDC/0.5A | 250VAC/0.5A, 24VDC/0.5A | 250VAC/0.5A, 24VDC/0.5A |
Connection wire diameter | 4-25mm² / 4-16mm² | 4-25mm² / 4-16mm² | 4-25mm² / 4-16mm² |
This remote monitoring SPD for electrical distribution is widely used in power supply circuits across industrial and commercial scenarios, including factory automation systems, data centers, commercial building power distribution, renewable energy power stations, transportation infrastructure, medical equipment power supply, and industrial control panels. It limits residual surge voltage to safe levels, protecting inverters, PLCs, instrumentation, power supplies, and other sensitive electrical equipment from damage caused by lightning strikes, switching overvoltage, and grid fluctuations.
Select the appropriate model based on the system’s nominal operating voltage, and mount the SPD via rail or base mounting per on-site requirements. Connect the wires in accordance with the wiring diagram, ensure reliable equipotential bonding and grounding, connect the remote signalling interface to the centralized monitoring system, and install the matched overcurrent protection device as specified.
During normal operation, the SPD maintains a high-impedance state with ultra-low leakage current, no impact on system operation. When a surge event occurs, it switches to a low-impedance state in nanoseconds, diverting surge current and clamping voltage to a safe level. In the event of component failure, the SPD triggers local fault indication and remote alarm signals, automatically disconnecting from the circuit to ensure system safety.
Leverage the hot-swappable design for module replacement without system power outages, and use remote monitoring for regular status checks without on-site inspection. Periodically verify grounding connection reliability and leakage current levels, with full maintenance procedures and troubleshooting guidance provided in the product user manual to ensure long-term protective performance.
