PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

19.14 Starters :
In selection of starters for starting of electric motors, the following criteria are to be
considered:
1) The necessity to help in ensuring stability of the grid by reducing the starting KVA
significantly.
2) The necessity to improve the mechanical performance of the pump and the motor
by providing smooth and jerkless starting.
3) The necessity to Increase motor life by reducing the motor inrush current to a large
extent.
4) In vertical turbine pump with long suspension length, Direct Online start with very
quick acceleration should be avoided. For longer life of the pumps, bearings and
wearing rings the necessity for smooth jerkless starting is always desirable
5) The necessity to improve the thermal characteristics thereby increasing the number
of Start and Stop.
6) The necessity to reduce the transformer rating and consequently the Transformer
installed capacity by reducing the starting KVA.
The Bidders in their technical offer shall submit details of H.T/L.T Panel and MCC.
19.15 Instrumentation and Control System.
All instruments and Control System, Transmitters, Gauges, LCP, Annunciation
System, Temperature Sensor/Scanner etc. along with all other accessories as
required shall be provided to achieve desired control and monitoring functions of
the station.
Following field instruments shall be provided for necessary indication, interlock,
monitoring purposes as a general guideline. The Contractor shall provide all
necessary instruments for safe and efficient operations of the Plant: -
(a) Level Control System for each Pump;
(b) Level indication arrangements for the common Intake Well;
(c) Pressure gauge for each Pump discharge and Pump common header;
(d) Pressure transmitter for the Pump Common Header;
(e) Pump Common Header Pressure Switch for low pressure indication and alarm;
(f) RTD for Motor winding, Bearing temperature for Pump and Motor;
DTS : Detailed Tender Specification. Page 199