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C . Combination Starter Units <br /> 1 . Combination starters shall include a motor circuit protector (MCP) in series with a motor <br /> controller and an overload protective device . The MCP shall have an adjustable magnetic <br /> trip range up to 1000 percent of rated continuous current and a trip test feature . MCP's <br /> shall be labeled in accordance with U1489 . <br /> 2 . Motor starters : 3 Pole , 600 Volt, shall be electrically operated . Provide NEMA sizes as <br /> required for the specific horsepowers . Minimum size shall be NEMA Size I . Fractional <br /> size starters are not acceptable . IEC rated starters shall not be acceptable . Starters shall <br /> have 120 Volt encapsulated operating coils; individual control power transformers with <br /> primary and secondary fuses and silver cadmium oxide renewable line contacts . <br /> 3 . Multi -speed and reversing starters shall include two motor rated contactors mechanically <br /> and electrically interlocked so that only one device may be energized at any time . <br /> 4 . Reduced voltage starters : Solid state, six SCR, full wave type with adjustable current limit <br /> and voltage ramp to control starting torque, automatic load sensing circuit to minimize <br /> energy consumption, line and load side surge protection and noise suppression and <br /> controlled deceleration adjustment to reduce the effects of surges caused by centrifugal <br /> pump loads . Provide heat sinks and ventilation to remove heat from the structure . Each <br /> starter shall include a motor horsepower rated isolation contactor to positively disconnect <br /> the line voltage when the SCR control is off. Each solid state reduced voltage starter shall <br /> include a by-pass full voltage motor starter (FVNR) which shall be capable of operating <br /> the motor in an across the line start mode. The FVNR starter shall be controlled <br /> independent of the SSRV so that in the event of the SSRV failure the motor will remain <br /> operable via the FVNR by-pass starter. The SSRV and the FVNR by-pass shall be <br /> completely isolated to allow for servicing and maintenance of either while the other <br /> remains operable, provide all necessary contactors, controls, relays, wiring, etc. <br /> 5 . Wye-delta starters shall be closed circuit transition for use with 6 or 12 lead motors . <br /> I <br /> 6 . Contactors : Electrically held, 120 VAC coil operator, suitable for tungsten, ballast, or <br /> resistive non-motor loads, with over current protection, control transformer and contact <br /> ratings and poles as necessary. <br /> l 7 . Motor overload protection: Standard, 3 Pole, thermal bi-metallic or melting alloy type, <br /> with push-to-test feature. Electronic or adjustable overload relays will not be acceptable. <br /> Overload relays for submersible pump motors shall be ambient compensated, quick trip, <br /> Class 10 . Overload relays shall be manually reset from outside the enclosure by means of <br /> an insulated pushbutton. Provide auxiliary alarm contacts as necessary. <br /> 8 . Auxiliary contacts: Form C, NEMA A600 rating, as required by the control schemes. <br /> I Provide 1 -normally open and 1 normally closed spare contacts on each starter. Additional . <br /> auxiliary contacts shall be famished as required by the control schematic. <br /> 9 . Control power transformers: Two winding type, 120 VAC secondary, fused in accordance <br /> with the NEC. Provide extra capacity as required. <br /> l <br /> 044572017 <br /> 16480-5 <br />