Providing Intercepetion and Diversion in Major Drains leading to Channels and providing borewell submersible motor in existing borewell in division No.2 at kamarajar colony at Suramangalam ward office.

Amount

Location: Kamarajar colony Sewage water collection sump to Main road Drain

a).Earth work excavation and depositing on bank with initial lead of 10 m and lift of 2 M in narrow trenches having bed width 1.25m & below for laying of pipes for water supply and sewerage works in the following type of soils In Medium rock and dense medium rock not requiring blasting as directed by Departmental officers TWAD SR 22-23

Location: Kamarajar colony Existing borewell to OHT

b).Earth work excavation and depositing on bank with initial lead of 10 m and lift of 2 M in narrow trenches having bed width 1.25m & below for laying of pipes for water supply and sewerage works in the following type of soils Hard stiff clay, stiff black cotton, hard red earth, shales, murram gravel, stoney earth and earth mixed with small size boulders and hard gravelly soil.SS20Bas directed by Departmental officers TWAD SR 22-23

Supply and Delivery of following specials with ISI making as per standard specifications (MEDIUM) TWAD SR 22-23 III(A) 1.0 (II) sl. no. 5

110mm dia PVC Pipe 6Ksc

110mm PVC Bend

90mm Dia PVC Pipe 6Ksc

Solvent Cement

Lowering PVC/ DWSC rigid pipes and specials to trench and laying to proper grade and alignment, jointing with PVC couplers with cement paste.

Refilling with excavated soil (other than sand) complying with the standard specification for filling in foundation and basement

a).Supply and delivery of submersible centrifugal sewage non-clog pumps, vertical spindle type pump , wear resistance with submersible motor for the various duty conditions as stated in the annexure. Pump shall be capable of handling min 100 mm solid size with sewage specific gravity of up to 1.05. Pump shall be of robust construction . Liquid passages shall be finished smooth and designed as to allow free passage to solids. Pump Impeller should be of Non-clog semi open type , single vane / multi vane preferably contra bloc or vortex impeller design. Double mechanical seal with silicon carbide faces should be provided to protect the motor from ingress of sewage along the shaft. The critical speed of the rotor shall be at least 30% above the operating speed. Pumps to have double bearings between the pump & motor. The bearings life shall be minimum 100,000 hrs of operation with greased for life. Pump should be provided with automatic coupling device including pedestal, duck foot bend, stainless steel guide pipe or related accessories of suitable size to facilitate lifting and lowering into guide rails for easy maintenance. Pump shall be provided with a stainless steel lifting chain conforming to BS 970 Gr 304. Pump speed shall be of 9600 rpm for high duty pumps and 960/1450 rpm for low duty pumpsets . Casing and impeller should be of CI Gr. FG 260 :IS210 more preferably with hardened impeller. Shaft should be of stainless steel AISI 410. All the fasteners and bolts shall be of AISI 410.The submersible motor shall be operated with 3 ph , 415 V( + or – 10 % ) , 50 Hz ( + or - 5 % ) dry induction type. Motor shall be capable of giving rated output without reduction in the expected life span when operated continuously. The rotating assembly shall be dynamically balanced as per standards. The starting current of the motor shall not exceed 200% of rated full load current for Star / Delta or ATS starting under any circumstances .The motor shall be suitable for full voltage star delta / ATS starting. The locked rotor current of the motor shall not exceed 600% of full load current unless otherwise specified. Motor shall be designed to withstand 120 % of rated speed for two minutes without any mechanical damage, in either direction of rotation. The motor vibration shall be within the limit specified in applicable standards . Motor should be of IE2, explosion proof compatible for VFD operation together with star-Delta / ATS starter, protection against increase in stator winding temperature (15 deg Celsius) , bearing temperature, leakage in the stator housing and terminal box shall be provided and to be suitably interlocked with the control panel for tripping the pump in case of increase in temperature beyond set limit. Insulation class shall be of “Class H” and degree of protection shall be of IP 68 as per IS 4691. Motor shall be suitable for continuous operation in fully submerged or partially submerged condition.The pumpset shall be supplied with power cable of PVC insulated and PVC sheathed , copper , flexible ,round type with required conductor size and number of cores as per starting method and of specified length for continuous use under water and air. The control cable of PVC insulated , PVC sheathed , flexible for stator winding temperature sensor 3 core x 1.5 sq.mm copper conductor and for bimetallic switches 2 core x 1.5 sqmm copper conductor shall be provided. Motor shall be supplied with 10 mts of round submersible copper cable of suitable size. The non clog submersible pumpset shall be provided with suitable starter control panel having all protections as mentioned above. TWAD SR 22-23 III(B) 22.0 Sl. no. 38

b).Supply and delivery of Submersible Motor pumpset as per IS 8034 with ISI standard specification, the Duty Condition are 50LPMx275 m head etc. complete including all cost and conveyance etc. complete TWAD SR 22-23 III(B) 3.1 Sl.No. 23

Supply and Delivery of 4 Way TPDB 63A / Way with fuse & Neutral Link. TWAD SR 22-23 III(G) /part-C Sl.no. 8(g)

Supply and Delivery of Four Pole 63 Amps 10Ka MCB for motor circuits Elec Part - L 6 (l) TWAD SR 22-23

Supply and Delivery of Dry Run Preventor. Electric Motor protection device against dry running. The device should protect the motor against dry running.(Elect. Mech. Sl no 13 TWAD SR 22-23 )

a) For Sewage Centrifugal Motor - Supply and delivery of Fully Automatic Auto Transformer Starter suitable for the motor offered. Floor mounting type air/ oil cooled Auto Transformer Starter with tapings at 50%, 65%, 80%, housed in robust steel chamber with arc and main contacts confirming to IS 8544 Part IV and as amended therafter for operation in AC three Phase 50 Hz (+/- 5%), 415V (+/- 10%) with the following components, under voltage release with no volt coil, over load relay with dash pot arrangements, single phasing preventor, LED ON/ OFF switches, Mounted Ammeter, Earth leakage relay, contactor assembly suitable for next standard KW rating, in coming and out going cable entry provisions, transformer tank including first filling of oil etc. TWAD SR 22-23 III(D) 11.7 Sl.No. 2

b) For Kamarajar colony Existing borewell Submersible Motor - Supply and delivery of Three Phase Panel Board Star-Delta with Two Level Guard and Auto Start for the motor offered. TWAD SR 22-23 III(B) 11.2 Sl.No. 3

Supply and Delivery of PVC Insulated and Sheated 3 Core Flat type Copper Cable Confirming to IS 694/1990. 4.0 Sq.mm. 12.1 (3 ) TWAD SR 22-23

Labour Charges for erection of Horizontal shaft, centrifugal pumpset (Coupled/Monoblock) in bore well/Open well including fixing of suction pipe and foot valve upto a maximum depth of 7 metres and delivery pipes to the required length with valves, pressure gauges upto the exterior wall of pump room and erection of panel board consisting of TPIC switches starter, Voltmeter, Ammeter, Capacitor single phasing preventor and laying and jointing the cables and twin earthing as per IE rules including providing bed blocks etc., complete and operating the pumps and trial run for 10 days including signing of completion of reports as required by EB authorities. TWAD SR 22-23 IV(E). Misc. Sl. no. 17c(ii)

Supply and fixng of TNEB Meter Board suitable for 3 Phases 63A service connection made up of suitable angle iron frame work of size 2 feet x 1 1/2 feet using angle iron of size 1 1/2" x 1 1/2" x 1/4" rigidly fixed on wall covered with hylem sheet of size 2 feet x 1/2 feet of 6mm thickness with necessary bolts and nuts supports and supply and fixing of 3 Nos 63A fuse units (500V) 1 No. Neutral link, copper earth flat of size 1" x 1/4" with inter connection of EB meter to fuse units by 7/16 PVC insulated copper wire with earth connection complete with GI Poles

SVN Borewell Service