Basic model + design serial number - rated capacity (kVA) / high voltage voltage measurement, such as: S7-315/10, three-phase copper core 10kV transformer, capacity 315kVA, design number 7 is energy-saving dry-type transformer; another example is SCB10- 1000Kva/10Kv/0.4kV, S means that this transformer is a three-phase transformer. If S is replaced by D, it means that the transformer is single-phase. The meaning of C means that the winding of this transformer is a resin-cast solid. B means foil winding, if it is R, it means winding winding, if it is L, it is aluminum winding, if it is Z, it shows on-load voltage regulation (copper is not standard). The meaning of 10 is the design serial number, also called the technical serial number. 1000kVA represents the rated capacity of this transformer (1000 kVA). 10kV means a rated voltage, and 0.4kV means a secondary rated voltage. Communication With Built-in Mastic Cold Shrink Tube High rate silicone communication cold shrinkable tube through the special silicone rubber raw materials made of high rate cold shrinkable tube. The cold shrinkable tube has the advantages of large shrinkage rate (4 and 5 times shrinkage), excellent physical and mechanical properties, puncture resistance, good sealing and protection performance and long-term protection. Products through the ROHS certification standard colour is black and grey, other colours can be customized. Suitable for communication feeder, cable TV connection joints waterproof moisture sealing, wire and cable connection insulation sealing; other types of connectors, size of the head of the reducer and shaped parts, antenna feeder reducer joints insulation protection. Cold Shrink Tubing for Communication,cold shrink tube,Built-in Mastic Cold Shrink Tube,Shrink tube Mianyang Dongyao New Material Co. , https://www.mydyxc.com