REC N-PEAK Series Installation Instructions Manual

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REC N-PEAK Series Installation Instructions Manual Manual pdf 11 page image

REC Installation Manual - N-Peak - IEC 61215 /61730Rev C - 07.19 Ref: NE-06-2211CONNECTIONS aND CONNECTORSThe connector type(s) used on REC solar panels are indicated in the product specifications at the rear of this manual. The connector IP rating isonly valid when they are correctly connected. all connectors and cables must be secure and tight as well as electrically and mechanically sound.UV-resistant cables and connectors approved for outdoor use must be used. Conductor gauge must be chosen to ensure DC power losses (voltagedrop) are kept to a minimum (<1%).Observe all local regulations when selecting cables. For string connections, use minimum 4 mm 2 or copper wires insulated for a maximum operatingtemperature of 90°C. Secure cables using UV-resistant cable ties or other device. Loose and unsecured cables must be protected from damage(e.g., mechanical, abrasion, sharp objects, animals). avoid exposing cables to direct sunlight and permanent tension.In order to ensure durable and safe connections between panels and BOS equipment, the following instructions must be followed in order to protectthe electrical connections from the elements. More detailed information is given in theGuide to Best Practice - Connections and Connectors whichcan be found via the REC online Download Center (www.recgroup.com/downloads).Safety is paramount when working with electrical connectors. Ensure that any installation work is not carried out on live or load-carrying parts.Connections must not be disconnected under load and the system must be isolated from the grid before carrying out any maintenance or repair work.CoNNECtorsTo ensure connector compatibility and reduce the potential for damage to the panels and the wider installation, REC recommends that matedconnectors are from the same manufacturer and of the same connector type. The factory-installed connectors on the REC N-Peak Series areStäubli ‘MC4’ design (exact types used are detailed in the panel characteristics at the rear of this manual), therefore REC only permits the matingof factory-installed connectors to connectors of the same manufacturer, type, and system rating as shown in the table below (fig. 10):Fig. 10: Connector mating matrixConnector 1 + Connector 2 Permitted?REC Factory-Installed + Stäubli MC4 REC Factory-Installed + REC Factory-Installed REC Factory-Installed + any other connector Some countries and/or regions have specific regulations regarding the mating of connectors. Installers are responsible for ensuring thecompliancy of the system with such local regulations.The cutting of cables is only permitted in order to replace a factory-installed connector with another brand of connector to ensure ‘like-for-like’ mating when connected to a non-REC external device. All other changes are prohibited and will invalidate the REC warranty.The connector replacement procedure must be carried out by the installer correctly and according to the replacement connectormanufacturer’s instructions. The selected replacement connector must also fulfil all relevant technical specifications and be certifiedaccording to applicable standards (e.g., IEC 62852 or UL 6703) so as to ensure they are fit for purpose and safety. The REC warrantydoes not extend to cover any fault traceable to the replaced connectors.• The correct and secure connection of connectors is identified by a firm click once inserted,• Use of any chemicals or lubricants on the connectors or contacts may only be carried out in line with the connector manufacturer’s instructions.Any other modification to the panel is prohibited, including the opening of the junction box, unless explicitly authorized by REC. Doingso will invalidate the warranty.ProtECtiNg tHE CablEs• To prevent stress on the junction box casing, ensure the cable exits the junction box in a straight line before any bend in the cable,• The cables on REC solar panels have a minimum bending radius of 30 mm to avoid damage to the insulation (fig. 11),• Ensure cables do not hang loose where they may be damaged through friction or stress, e.g., caused by wind or grazing animals,• Shield connectors from falling or dropping water by locating them directly beneath a panel,• Cables must be firmly secured to the structure, without over-tightening, as this can deform the cable insulation.sECuriNg CablEs aNd CoNNECtors• When securing the connector, place it so that it has with sufficient air circulation all around. This allows the connector to dry effectively andavoids the risk of damage or degradation of the connection,• Good practice is to secure the cable either side of the connectors, ensuring no stress is exerted on the connector casing or cable entry.To enable correct cooling and drying of the connectors, do not add extra protection to the connector, e.g., heat shrink, grease or tape.< 60 mm >< 30 mm >Fig. 11: Minimum cable bend radius