Reliability in Surge Protection. Photovoltaic Systems.

Transcription

1 Reliability in Surge Protection Photovoltaic Systems

2 Roof top installations For low power PV applications, i.e. residences and small offices, it is necessary to consider surge protecting the AC output of the Inverter that connects directly into the electric power grid as well as the DC input side of the Inverter fed by the PV modules. SPD location The diagram below shows the pertinent locations for surge protectors as described in the CLC/TS6643- guide. Additional Surge Protectors If the equipment to be protected (inverter or PV modules) is located more than 0 meters away from the initial surge protector, the the guide imposes the insertion of a complimentary surge protector to improve the level of protection. DC surge protection panel located in front of the inverter to protect against lightning induced transients originating from the solar PV array. Datalines Datalines surge protectors to protect inverter, communication equipment and PC workstations against lightning induced transients entering the system via exposed sensors or communications lines. AC Surge Protector to protect all loads connected to the facility s main distribution panel against transients originating from the AC utility grid. AC surge protection panel located in front of the inverter to protect against threats from the AC utility and generated internally inside installation

3 Efficient Surge Protection of your Solar installations A PROFESSIONAL APPROACH TO LIGHTNING AND SURGE PROTECTION WILL GUARANTEE YOUR PHOTOVOLTAIC SYSTEMS A LONG LIFE. Industrial and public buildings Medium to large power PV systems can be installed on industrial and service facilities. In order to avoid very costly downtime and lost productivity resulting from a direct or indirect lightning strike, it is critical, and in some cases mandatory, to install surge protection at key points within your facility and its vital power and communication networks. Type surge protector If the building is not equipped with a lightning rod system then a Type surge protector is necessary or compulsory on the AC and DC inputs of the inverter. On the PV side, for cable lengths greater than 0 meters it is mandatory to install complimentary surge protectors at each end of the cable run. DC surge protection panel This combiner box includes DCsurge protector, PV switch and fuses (if required). Due to the long cable runs and exposed nature associated with a rooftop PV system, it is both necessary as well as mandatory to place surge protection at the combiner box and inverter DC input. Datalines Dataline Surge Protectors For inverters connected to data networks (monitoring, control) or probes (luminous flux, temperature...), installation of relevant surge protectors is highly recommended. Type AC surge protector When the local lightning density is Ng >.5, by standard, it is mandatory to install an AC surge protector at the incoming service of the three phase network. In areas with a lower lightning density, while it is not mandatory, it is certainly good practice to install a surge protector for protection against switching transients originating from the external power grid not associated with lightning.. Additonal AC surge protector A complimentary surge protector is required at the AC input of the PV inverter. These can be integrated into a dedicated surge protector panel (CPV440) or in a secondary board.

4 PV power plants PV power plants present a high risk of direct lightning impact and surges due to the large exposed area and the long lengths of the electric conductors.in order to avoid problems leading to costly damage and downtime, it is compulsory to install surge protectors at key points in the PV system. Type surge protector If the PV field is equipped with lightning rod systems (rods, open air wiring ) Type surge protectors are compulsory at the AC input. On the DC side, Type surge protectors are compulsory at the inverters DC output for applications with a non-isolated lightning rod systems as defined by CLC/TS Due to the long lengths of cabling required to connect numerous strings running throughout the PV farm, complimentary surge protectors are required at the input of the PV modules as well. Type DC Surge Protector panel Due to the long length of wires (>> 0 m), additional Type SPDs are required at the input of PV modules. They are usually installed inside combiner boxes. Datalines Dataline Surge Protectors For inverters connected to data networks (monitoring, control) or probes (luminous flux, temperature...), installation of relevant surge protectors is highly recommended. AC Surge Protector Type surge protector is required at the entrance whenever a lightning rod is installed on the premises. Type DC Surge Protector Due to the risk of direct lightning strikes, Type surge protector must be applied. It is compulsory whenever the structure is equipped with a non-isolated lightning rod. If not, Type SPD is required.

5 Surge Protectors Selection DS60VGPV Type Surge Protector for PV power supply EN compliance CITEL range DS60VGPV-600G/5 DS60VGPV-000G/5 DS60VGPV-500G/5 Maximum DC operating voltage Ucpv 70 Vdc 00 Vdc 500 Vdc DS60VGPV-500G/5 Nom. discharge current (8/0µs) In 40 ka 40 ka 40 ka Lightning current (0/350µs) Iimp.5 ka.5 ka.5 ka by pole Protection level Up. kv 3.4 kv 3.4 kv Remote signaling Yes Yes Yes DS50PV and DS50VGPV Type pluggable Surge Protector for PV power supply EN compliance CITEL range DS50PV-500/5 DS50PV-600/5 DS50PV-800G/5 DS50PV-000G/5 DS50VGPV-500G/5 DS50VGPV-500G/5 Maximum DC operating voltage Ucpv 600 Vdc 70 Vdc 960 Vdc 00 Vdc 500 Vdc Nom. discharge current In (8/0µs) 5 ka 5 ka 5 ka 5 ka 5 ka Protection level Up. kv.8 kv kv. kv 3.4 kv - Available with remote signal : DS50PVS-xxx - Specific version DS50VGPV available : total suppression of operating and leakage currents. DS50PV-800G/5 DS30R - DS40 DS440 - DS40 Type and Type Surge Protectors for AC power supply IEC6643- compliance CITEL range DS30R DS40 DS440 DS40 DS34R-30/G DS4-30/G Surge protector Type + Type Type Type Un 30 Vac 30 Vac 30 Vac 30 Vac Max. AC operating voltage Uc 55 Vac 55 Vac 55 Vac 55 Vac Nom. discharge current (8/0µs) In 0 ka 0 ka 0 ka 0 ka Max. discharge current (8/0µs) Imax - 40 ka 40 ka 40 ka Max. lightning current (0/350µs) Iimp.5 ka P/N for single phase network DS3R-30/G DS4-30/G - DS40-30/G DS440-30/G DS40-30/G 30/G P/N for 3L+N network DS34R-30/G DS44-30/G DS440-30/G - DLA Pluggable Surge Protectors for Data lines Part number DLA-48D3 DLA-4D3 DLA-06D3 Type of line PT ma RS485 DC nominal operating voltage Un 48 Vdc 4 Vdc 06 Vdc DLA-4D3 Nom. discharge current (8/0µs) In 5 ka 5 ka 5 ka Max. discharge current (8/0µs) Imax 0 ka 0 ka 0 ka

6 Surge protector combiner boxes for photovoltaic installations CITEL offers a wide range of combiner boxes which provide features such as surge protection, overcurrent protection, connection and switching. These units are designed to be installed on both AC and DC sides of the photovoltaic inverters following CLC/TS guide. Numerous configurations are available. toward AC surge protection box + RCB t o V Pac : Type Single-phase surge protector D : external disconnector for SPD (circuit breaker) ELCB : Earh Leakage Current Circuit breaker 5A/30 ma Pdc : PV surge protector, Type S : DC switch C : terminal for string connection D ELCB Pac L N Photovoltaic inverter AC DC - + PV surge protection box + DC switch + string connection t o V S Pdc C CPV40 Part number AC Surge Protector Combiner Box- Type for inverter AC side CPV40-xxx Network 30 Vac single-phase Max. operating voltage Uc 55 Vac Nominal. line current (xx) IL 6-3 A* Residual current protection 30 ma* Nominal discharge current In 0 ka Max. discharge current Imax 40 ka Protection level Up.5 kv *Specific version : consult us CPV50 PV Surge Protector Combiner Box- Type for inverter PV side BR090A - Document could be modified without notice Part number CPV50-xxx DC operating voltage (xxx) Vdc DC switch Yes Connection of strings from to 4* Fuses in series depending of the configuration Remote signaling disconnection option Nominal discharge current In 5 ka Max. discharge current Imax 40 ka *Specific version : consult us, rue Troyon Sèvres CEDEX - France Tel. : ; Fax : contact@citel.fr Web :