Pluggable Multi-Pulse Surge Protective Device
Pluggable multi-pulse SPD with built-in backup protection: multi-pulse peak current 40kA, 10-pulse capability, response ≤25ns and 100A power-frequency short-circuit breaking. Supplied in 2P, 3P and 4P versions for 230V and 400V systems.
Overview
Key Features
Multi-pulse withstand
10P multi-pulse capability for repeated lightning strikes in thunderstorm-prone areas.
Built-in backup protection
Integrated power-frequency short-circuit protector, Isc 100A, breaking time 0.9~1.5s.
Nanosecond response
Response time ≤25ns with a voltage protection level Up ≤1500V.
Pluggable modules
Replaceable plug-in cartridges shorten replacement time and maintenance downtime.
Three protection modes
L/N-PE, three-phase without N, and three-phase with N-PE.
DIN rail mounting
Standard 35mm DIN rail, pluggable module, IP20.
Technical Data
| Operating voltage Un | 230V / 400V |
| Multi-pulse peak current IM | 40kA |
| Multi-pulse number Pn | 10P |
| Voltage protection level Up | ≤1500V |
| Response time | ≤25ns |
| Backup protection | Built-in power-frequency short-circuit protector |
| Power-frequency short-circuit current Isc | 100A (+10%) |
| Short-circuit breaking time | 0.9 ~ 1.5s |
| Degree of protection | IP20 |
| Protection modes | L, N-PE / L1, L2, L3 / L1, L2, L3, N-PE |
| Mounting | 35mm DIN rail, pluggable module |
| Remote signalling | None |
Models & Selection
| Parameter | ZL5-V-40kA/275-2P | ZL5-V-40kA/385-3P | ZL5-V-40kA/385-4P |
|---|---|---|---|
| Operating voltage Un | 230V | 400V | 400V |
| Maximum operating voltage Uc | 275V | 385V | 385V |
| Multi-pulse peak current IM | 40kA | 40kA | 40kA |
| Multi-pulse number Pn | 10P | 10P | 10P |
| Voltage protection level Up | ≤1500V | ≤1500V | ≤1500V |
| Protection modes | L, N-PE | L1, L2, L3 (no N) | L1, L2, L3, N-PE |
| Response time | ≤25ns | ≤25ns | ≤25ns |
Model naming rule：ZL5-V-40kA/275-2P ZL5-V-40kA/385-3P ZL5-V-40kA/385-4P
Installation
FAQ
How does a multi-pulse SPD differ from a standard SPD?
A multi-pulse SPD is tested to 10 pulses, rated Pn 10P, at a peak current of 40kA. It is intended for locations with frequent thunderstorms and repeated strikes, where a single-pulse rating would not describe the real duty.
What is the benefit of the built-in backup protection?
The built-in power-frequency short-circuit protector is rated Isc 100A with a breaking time of 0.9~1.5s. No external circuit breaker is needed upstream of the SPD, which saves space inside the enclosure.
What are the Up and response time values?
The voltage protection level Up is ≤1500V and the response time is ≤25ns. The same Up figure applies to the 2P, 3P and 4P versions, so downstream coordination can be calculated on one value.
Which models and protection modes are available?
ZL5-V-40kA/275-2P covers L, N-PE; ZL5-V-40kA/385-3P covers L1~L3 without N; ZL5-V-40kA/385-4P covers L1~L3 plus N-PE. All three share a 40kA multi-pulse peak current and ≤25ns response.
What certification applies and how is pricing provided?
Certification is held through a CE / CMA / CNAS accredited laboratory. Price and lead time are quoted per model and quantity; Request a quote with the model code and the protection mode required.