Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 08: Electrical Works  34 of 124  Protection:  RC-snubber network protection circuits shall be provided for softstarter sizes designed for rated  current of 200A and more, to avoid possible component damage. The soft starter shall be capable of withstanding the following environmental conditions during operation and  may not cause any electrical/ mechanical damage or degradation of performance.  The soft starter shall be housed in a plastic material and termination points provided to accommodate the  required incoming cables for the line and load connections.  The soft starter shall be ventilated with fan cooling when necessary. The fans shall be temperature regulated and  automatically switch on during soft start and soft stop (if used) and in between only when cooling is necessary.  This in order to reduce energy consumption and noise level of the Soft starter as well as increasing the life  length of the fans. All Soft starters shall be equipped with integrated by-pass contacts or contactor(s) as standard. This design shall  reduce the power losses during continues run to allow enclosing the soft starter without using any forces  cooling. The sensitive parts on the electronics, the printed circuit board assembly, shall be protected from harsh  environments using protective coating.  The vendor shall be certified to ISO 9001 (quality certification) and ISO 14001 (environmental certification).  The produced soft starter shall be functionally tested operating a motor, prior shipment to assure proper  operation per specification.  Subassemblies shall be inspected and/or tested for conformance to vendors engineering and quality assurance  specifications.  Each soft starters shall be marked with an unique serial number to secure tractability. The marking shall be  possible to read after installation. Bypass relay and contactor.  Units shall be shipped with a complete set of documentation to include the following items:  The soft starter unit shall be clearly marked with information regarding current and voltage ratings at the front  of the soft starter. Vital information at the side of the soft starter is not accepted, as the surrounding components  and/or enclosure easily can cover this information.  8_Vol3_d4 3_Section 8 electrical works_en_GIR rev6.doc  8.7.16 Frequency converter motor controllers  (21)  Documentation and Marking  (20)  Quality Requirements  (19) Mechanical Construction  (18)  Ambient Conditions  • It shall provide Complete schematics and wiring diagrams and dimensional drawings  • Main product catalogues Temperature:  As a standard of soft starter design quality, the starter shall be documented to show that the  open chassis design has been tested for -25 – 60°C operation with de-rating above 40$^{o}$C.  Altitude:  4000m maximum with de-rating above 1000m. Thermal:  The soft starter shall be equipped with a heat sink temperature switch designed to protect the  thyristors (SCRs) from over temperature. 