Water Resources Department Tender

Supply, Transportation, Installation, testing and Commissioning of Gate position sensors with suitable coupling design, mounting, cabling, protection arrangement, etc. ( Suitable sensors shall be provided for exact measurement & indication of position of reservoir gates, head regulator gates & river sluice gates. These sensors shall be equipped with suitable shaft couplings and electronic circuits to transmit the signals to the SCADA System via Local PLC for indication of gate positions, to slave PLC/SCADA installed at Sub Control Room and further to master SCADA installed at ICCC for further processing. All sensors & display units are to be mounted in the outdoor locations. Hence, suitable protection class of the enclosures shall be ensured for sensor and field mounted display. Minimum IP65 protection class shall be provided. Suitable safe & reliable arrangements of coupling with the motors of gates shall be provided. It shall be ensured that there is no slippage between the motor shaft & the transducers. Ambient Temperature - From 0ºC to + 55ºC , Humidity - 5 to 95 % (non- condensing), No. of Gates - Poondi_20 no’s, Chembarabakkam_24 no’s, Red Hills_2 no’s, Type of gate - Poondi_20 no’s Vertical Movement Sluice Gates,Chembarabakkam_24 no’s _, Vertical Movement Sluice Gates, Red Hills_2 no’s _Vertical Movement Sluice Gates, Motorised status, Gear drive status, and motor details - Poondi_20 no’s_ motorised operational, Gear drive and 11 KW motor, Chembarabakkam_24 no’s, motorised operational, Gear drive and 11 KW motor, Red Hills_2 no’s.

Gate Sensor : Sensor Type - Standard Electronic absolute Multi Turn Shaft Encoder based rotary position sensor, Construction - Sturdy bearing with Extra Large bearings. Mechanically protected shaft seal. Minimum Cycle Time - 1 milli Second , Protection - Reverse polarity protection. Short-circuit proof outputs, Resolution - 12-bit discrete positions or better, Range - 0-10 meters, Multiturn - Yes, required scalable up to 65,536 revolutions Limit switch function - Limit switch function. Required. Accuracy - Single turn accuracy, ±1° , Output Interface - SDI-12 / RS 485 / 4-20 mA or as compatible to PLC output signal scalable via the teach inputs , Power Supply - 2 wire type, to be powered by RTU/PLC, Supply Voltage - 10 to 30VDC with reverse polarity protection. General Features : Material - Corrosion Resistance Metal (Stainless steel or Aluminium) Enclosure - Lockable (key) box provided by the supplier to be mounted on sensor, with IP65 or better protection Tools - Complete tool kit for operation and routine maintenance Bellow Coupler tools Manuals - Full Documentation and maintenance manual in English Mounting - Coupler, mounting brackets, Wiring from sensor to RTU/PLC must be through HDPE/ GI Pipe Conduits or flexible metallic conduits wherever applicable Local Display - Status display LED’s, Read out LCD / LED field mounted Display Process connections - through suitable coupling Manufacturer’s Calibration Certificate - Required along with CE and UL Certificate. Any Cable / Wiring work the external protoction arrangements should be ensured Complete complying with standard specification and as directed by engineer in charge. ( As per Quotation Rate )

Supply, Transportation, Installation, Testing and Commissioning of Actuators for retrofitting the existing gates, complete with power supply, control panel, motor, gear box, position sensors, protection, coupling, cables, etc ( Should Comply DIN 19704). enabling SCADA control of gates for Gates in Link Canal (towards Redhills , Chembrambakkam) Gates at Sirukadal point etc. Features : (i) Actuators for retrofitting the existing gates, control panel, motor, gear box, position sensors, protection, coupling, cables, etc. enabling SCADA control of gates for Link and Feeder Canal at sirukadal. (ii) WRD will provide necessary power supply arrangements required for operating actuators at sirukadal. (iii) The actuators are proposed to operate the link and feeder canal gates remotely through ICCC, to ensure proper distribution of drinking between red hills lake and Chembarambakkam reservoir. These actuators automatically operates gates based on the instructions from decision support system, during flooding season while assessing the volume of water in all 3 reservoirs, as to ration the water from Poondi to Chembarambakkam and Red Hiils. (iv) Multi turn Electric Actuator with control type on/off and modulating, Internal position sensor, vertical or horizontal stem orientation with flexible speed, limit switch, assemblies, telemetry, embedded controller, (v) Drive Mechanism should operate on 240VAC, with 2 switches, one for Fixed Position: Toggle HOA (Hand, Off, Auto/SCADA) and Manual, Momentary Up/Down Toggle, fuse holder, external 12 VDC power input, hardwired limit logic along with Electric Motor, Gear Box, Lead Screw, Rod or Shaft and break mechanism. (vi) Modular interface concept for remote control. (vii) Programmable control logic (“Push – to – run” or Thyristors (optional)) (viii) Automatic phase correction (ix) Motor control via reversing contactors or Thyristors (x) High enclosure protection, corrosion protection (xi) Control input with different voltages (xii) Functional safety , in selected configuration, safe end position feedback upto SIL 2 should be possible. Any Cable / Wiring work the external protoction arrangements should be ensured Complete complying with standard specification and as directed by engineer in charge. ( As per Quotation Rate )