REC Installation Manual - REC Alpha 72 Series - IEC 61215 /61730
Rev A - 02.20
Ref: NE-06-23
11
CONNECTIONS AND CONNECTORS
The connector type(s) used on REC panels are indicated in the product specifications at the rear of this manual. The connector IP rating is only valid
when 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 (voltage drop) 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 operating temperature of 90°C,
• 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 protect
the electrical connections from the elements.
CONNECTORS
To ensure connector compatibility and reduce the potential for damage to the panels and the wider installation, the connectors used on the REC
Alpha 72 Series are detailed in the Panel Characteristics at the rear of this manual. REC only permits the mating of factory-installed connectors to
connectors of the same manufacturer, type, and system rating as shown in the table below (fig. 8):
Fig. 8: Connector mating matrix
Connector 1
+
Connector 2
Permitted?
REC Factory-Installed
+
Stäubli MC4 Evo-2
On 1500V Systems
REC Factory-Installed
+
Stäubli MC4
On 1000V Systems
only
REC Factory-Installed
+
REC Factory-Installed
REC Factory-Installed
+
Any other connector
CUTTING THE CABLES
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 correctly and according to the replacement connector manufacturer’s instructions.
• The selected replacement connector must also fulfil all relevant technical specifications and be certified according to applicable standards
(e.g., IEC 62852 or UL 6703) to ensure they are fit for purpose and safety.
• Use of any chemicals or lubricants on the connectors or contacts may only be carried out in line with the connector manufacturer’s instructions.
The REC warranty does not extend to cover any fault traceable to the replaced connectors. Any other modification to the panel is prohibited,
including the opening of the junction box, unless explicitly authorized by REC. Doing so will invalidate the warranty.
CABLE MANAGEMENT
To ensure a long life span of the cables and reduce the potential for damage to the cables, follow the instructions below:
• 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 must have a minimum bending radius of 30 mm to avoid damage to the insulation (fig. 9),
• Ensure cables do not hang loose where they may be damaged through friction or stress, e.g., caused by mechanical abrasion or grazing animals,
• Protect 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 using UV-resistant cables,
• When securing the connector, place it so that it has with sufficient air circulation all around. This allows the connector to dry effectively and
avoids the risk of damage or degradation of the connection,
• Secure the cable either side of the connectors to ensure 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.
More detailed information is given in the
Guide to Best Practice - Connections and Connectors which can be found via the REC online Download
Center (www.recgroup.com/downloads)
NOTE
Some countries and/or regions have specific regulations regarding the mating of connectors. Installers are responsible for ensuring the compliancy of the
system with such local regulations.
i
DANGER -
Electrical shock
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.
< 60 mm >
< 30 mm
>
Fig. 9: Minimum cable bend radius
