2 of 124  Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 08: Electrical Works  8_Vol3_d4 3_Section 8 electrical works_en_GIR rev6.doc  8.7.8 Transient and surge protection equipment ............................................................................ 26 8.7.9 Busbars.................................................................................................................................. 26 8.7.10 Assembly ventilation............................................................................................................. 27 8.7.11 Circuit breakers (CBs)........................................................................................................... 27 8.7.12 Earth leakage circuit breakers ............................................................................................... 27 8.7.13 Isolating switches .................................................................................................................. 28 8.7.14 Motor controllers................................................................................................................... 28 8.7.15 Soft starters ........................................................................................................................... 29 8.7.16 Frequency converter motor controllers ................................................................................. 34 8.7.17 Motor valve controllers ......................................................................................................... 36 8.7.18 Control panels for local functions ......................................................................................... 36 8.7.19 Labelling and marking .......................................................................................................... 38 8.8 Instrumentation ..................................................................................................................... 38 8.8.1 General .................................................................................................................................. 38 8.8.2 Signalling and Protection Circuits ........................................................................................ 38 8.8.3 Instrumentation ..................................................................................................................... 39 8.8.4 Oxygen measurement system................................................................................................ 39 8.8.5 ORP measurement system..................................................................................................... 39 8.8.6 Ammonia & Nitrate Ion Selective Probe .............................................................................. 40 8.8.7 Suspended Solids & Turbidity Measurement System........................................................... 40 8.8.8 pH Measurement System ...................................................................................................... 40 8.8.9 Automatic sampling device................................................................................................... 41 8.8.10 Ultrasonic Level Measurement ............................................................................................. 41 8.8.11 Radar Level Measurement .................................................................................................... 41 8.8.12 Hydrostatic Level Measurement ........................................................................................... 42 8.8.13 Secondary Clarifier Level Measurement............................................................................... 42 8.8.14 Level switches....................................................................................................................... 43 8.8.15 Pressure Transmitter.............................................................................................................. 43 8.8.16 Flow Measurement................................................................................................................ 43 8.8.17 Temperature transmitter ........................................................................................................ 45 8.8.18 Explosive Atmosphere Detector ........................................................................................... 45 8.9 Electrical Installations........................................................................................................... 46 8.9.1 Lighting................................................................................................................................. 46 8.9.2 Outdoor lighting equipment .................................................................................................. 47 8.9.3 Emergency lighting ............................................................................................................... 48 8.9.4 Socket outlet stations............................................................................................................. 48 8.9.5 Uninterruptible power supply (UPS)..................................................................................... 49