Surge arresters for DC installations, RSP-PV... series, 50kA

2,3-pole surge arresters for photovoltaic systems, Imax = 50 kA/pole

Technical info

RSP-PV surge arresters with a maximum discharge current of 50 kA are Class I+II, Type 1+2 protectors for DC applications, such as protection of the PV (photovoltaic systems) side of DC, especially in high-exposure areas or building entrances LPZ 0-2 (IEC 62305-4) against damage caused by direct or near lightning strikes; they are suitable for the main switchgear.

The arresters in this series for DC installations have a built-in potential-free contact (1P) for remote fault indication. The RSP-PV4.5 -600-2P and RSP-PV6.0 -1000-3P arresters are dedicated to protect PV strings and small, medium and large PV installations. RSP-PV4.5 -1200-3P and RSP-PV4.5 -1500-3P arresters for commercial PV systems and solar farms.

Important features

Place of application: junction box, inverter
Power networks: photovoltaic and DC
Protection methods: (+/-)-PE, (+)-(-)
Protection elements: MOV
Mechanical status indicator: green/red flag
Compliant with standards: IEC 61643-31:2018, ISO 9001, CE, RoHS

Protection
Surge arresters up to 50 kA use high-performance varistors (MOV), which effectively protect the installation against overvoltage and lightning while eliminating the risk of follow-up current.

It is worth noting the double redundancy of the protection modules in each pole - this means that two independent MOV modules operate in parallel in a single pole. Each of these modules has its own signalling window, allowing visual monitoring of their status.

Thanks to this design, even if one of the modules fails or its indication window turns red, the arrester continues to operate and provide protection. This allows for continuity of surge protection and gives the user the ability to schedule replacement of the failed module at a convenient time, without immediate interruption to the system.

Electrical parameters

	RSP-PV4.5 -600-2P	RSP-PV6.0 -1000-3P	RSP-PV4.5 -1200-3P	RSP-PV4.5 -1500-3P
Max. continuous operating voltage U_cpv	670 V DC	1120 V DC	1340 V DC	1500 V DC
Nom. discharge current (8/20 μs) I_n	20 kA	20 kA	20 kA	20 kA
Max. discharge current (8/20 μs) I_max	50 kA	50 kA	50 kA	50 kA
Impulse discharge current (10/350 μs) I_imp	4,5 kA	6 kA	4,5 kA	4,5 kA
Voltage protection level U_p	2,2 kV (+/-)-PE 4,0 kV (+)-(-)	3,5 kV (+/-)-PE, (+)-(-	4,0 kV (+/-)-PE, (+)-(-	4,5 kV (+/-)-PE, (+)-(-)
Response time	≤ 25 ns
Ambient temperature (operating)	-40...+85 °C
Cross section of cables connected to terminals	1,5 mm² (wire single core)