49 of 124  Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 08: Electrical Works  8.9.4 Socket outlet stations  8.9.5 Uninterruptible power supply (UPS)  8_Vol3_d4 3_Section 8 electrical works_en_GIR rev6.doc  The UPS system for the treatment plant shall ensure the operation of the control and monitoring system and  protect the system from losing data in case of a power cut. UPS shall have a means of on-line test procedure to  test battery condition and battery management system to ensure 10 years of battery life time.  A UPS system shall be provided for the whole control and monitoring system and the instrumentation at the  treatment plant, which is double conversion on-line type. It shall include automatic transfer switch, manual  maintenance bypass switch. Design shall be based on microprocessor/DSP controlled “pulse width modulation”  technique.  Administrative  building  CCTV  /PLC boards  SCADA  Fire System  Phone/ Data  (Ethernet/fiber  converter)  system  400V socket outlets shall be according to CEE and 25 A.  Each socket outlet shall be combined with a load switch and leakage current relay.  400V AC socket outlets , the socket outlets shall have active earthing contact. When a plug is not inserted, the  plug hole shall be covered by a lid. If the plug is pulled out when loaded, arching shall be extinguished inside  the unit and confined in the enclosure.  230V socket outlets shall be 13A CEE-types, according to BS 1363.  230V AC socket outlets , the socket outlets shall have active earthing contact. When a plug is not inserted, the  plug holes shall be covered by a lid.  400V socket outlets shall be installed where required due location of machinery, maintenance procedures etc.  The socket outlets shall be equally distributed in the rooms. The number of 230V socket outlets shall be based on the area of each room and each socket outlet shall cover  no more than 7 m$^{2}$, hence a room off 16 m$^{2}$ shall be provided with 3 socket outlets.  230V socket outlets for supply of household appliances and similar equipment shall be provided in all buildings  and rooms of the plant.  The stations shall comprise the following socket outlets, each supplied from its own circuit breaker and ELCB:  The socket outlets shall be installed in a socket outlet station, a box made of glass-reinforced polyester. The box  shall be in protection class IP65.  At least 1 pcs station for indoor industrial type rooms and 1 pcs outdoor for each 30 mt.  Socket outlet stations shall be provided for indoor and outdoor locations as follows;  Socket outlet stations shall be provided for power supply of maintenance equipment such as welding units,  power tools and hand held lamps and for the places such as Bio-P tanks, aeration tanks, RAS station, outlet  station, etc  - one 230V  - one 230V, CEE type  - one 400V, CEE type. 