￭ Implementing an interlocking between the disconnecting devicesThe customer (or the system integrator) must implement an interlocking circuit between theDC switch/disconnector of the DC/DC converter unit and the energy storage disconnector.The user must not be able to close the energy storage disconnector before closing the DCswitch/disconnector [Q11] of the DC/DC converter.Selecting and routing the energy storage cables￭ Recommended cablesThe customer (or the system integrator) must acquire and connect the energy storagecables. It is possible to use either 3-conductor shielded cable(s) or 4-conductor shieldedcables:• If you use a 4-conductor shielded cable, use 2 conductors for plus and 2 conductorsfor minus and the shield for PE.• If you use a 3-conductor shielded cable, use 1 conductor for plus, 1 conductor for minusand 1 conductor and the shield for PE.￭ Typical cable sizesSee the technical data.￭ Minimizing electromagnetic interferenceThe customer (or the system integrator) must obey these rules in order to minimize theelectromagnetic interference caused by rapid current changes in the energy storage cables:• Shield the energy storage cabling completely, either by using shielded cable or a metallicenclosure. Unshielded single-core cable can only be used if it is routed inside a cabinetthat efficiently suppresses radiated emissions.• Install the cables away from other cable routes.• Avoid long parallel runs with other cables. The minimum parallel cabling separationdistance should be 0.3 meters.• Cross other cables at right angles.Keep the cable as short as possible in order to minimize the radiated emissions and stresson converter IGBT semiconductors. The longer the cable, the higher the radiated emissions,inductive load and voltage peaks over the IGBTs of the DC/DC converter.￭ Maximum cable lengthThe maximum cable length of the energy storage cable(s) is 100 m (328 ft).56 Guidelines for planning electrical installation
