TECHNICAL SPECIFICATION OF 1200LPH HIGH VACUUM TRANSFORMER OIL FILTERATION PLANT MACHINE

The plant will be suitable for carrying out following operations

1. Degassing, Dehydration and Filtering Transformer oil under high vacuum and give required parameters in three to five passes at the rated flow.

2. Filling of treated oil in to transformer tank. 3. Filtration and Dehydration of Transformer 4. The plant will be capable of attaining the following oil parameters in 3/5 passes.

a. Breakdowns voltage with 2.5mm electrode gap - 50-70kV b. Moisture content - upto

d. Rating of each heater and total nos 3.3kw, total numbers -9Nos (3phase system)

e. Selector switch provided yes f. Maximum temperature of oil- 60`C g. Temperature Indication Dial stem type thermometer. h. Thermal insulation Glass wool claded in CRCA sheets

Filtration System: It will be suitable for removing suspended particles such as colloidal carbon, oxidation sludge, dirt, dust rust scales etc up to

Discharge Pump

Positive Displacement type or glandless centrifugal canned motor pump Discharge pump with a capacity of 1200LPH. Suitable for sucking oil from the degassing chamber held under vacuum shall be provided. This shall be fully tested for pressure and vacuum leak rate. Provided with automatic pressure Bypass, SCV. The discharge head of the Outlet pump shall be 15Mtrs.

N.R.V (Non-Return valve) at Inlet & Outlet.

One number NRV at inlet and one number at outlet shall be provided. Valve at the inlet & outlet shall open automatically. The moment oil inlet and outlet, in case of power failure these valves shall be capable of preventing the oil from entering into the plant and thus avoiding the possibility of mixing processed oil with unprocessed oil.

Oil sampling valve

This valve shall be provided to collect the sample of oil for testing during operation.

Airing valve:

One airing valve for airing the degassing chamber shall be provided.

Gauges and Instruments:

A dial type thermometer shall be provided at outlet and inlet at the heater tank for indication of oil temperature.

Pressure Gauge:

One compound gauge on the housing pre filter chamber and one compound gauge shall be provided on the fine filter chamber to indicate the differential pressure.

Independent drives:

Independent drives for oil discharge pump, oil inlet pump and vacuum pumps shall be provided. Motors shall conform generally to IS-325 and shall be of class-F insulation. Starter shall be of suitable type. Preferable make of motors: Siemens, ABB & Kriloskar.

Control Panel:

All Electrical control Gear, Mains Isolating Arrangement, Protection system, Starter, Contactors , pilot lamps, Push Buttons, MCB, Relays, Indicating lamps and interlocking shall be housed in a compact control panels and made of CRCA sheets.

A mimic diagram with indicating lamps shall be provided on the control panels. All wiring shall neatly rout and all wire termination shall be suitably identified with ferules. All MCB shall be of L&T/Siemens/ABB make and switchgear shall be of Telemechanic/L&T/Siemens/ABB make. The plant shall be suitable for operation on 415volts 3phase, 4wire, 50 Hz AC supply.

OIL HOSES -2 Nos.

Two Numbers of Nitrile rubber hoses each 10Meters long with end connection on both sides shall be provided. One for inlet and one for outlet oil hoses shall be capable of handling the transformer oil at 100 degree `C and vacuum.

Pipes and Valves:

The valves in oil line and vacuum line shall be of ball type. All pipes shall be of ERW and all joints in oil and vacuum line shall be flanged and shall have `O` ring sealing. `O` rings shall be of Nitrile rubber and shall be of round shape. The entire plant along with all components mounted shall be tested for a total vacuum leak rate of less than 1 Torr/Ltrs/Sec.

Lifting Hooks:

Lifting hooks for plant shall be provided to facilitate ease of plant loading/unloading

Inspection and Testing

The machine will be inspected and tested at the manufacturer site by the Department representative before dispatch of the machine.

Complete manual containing details of flow chart and electrical single line diagram with rating and complete specification for all the parts of plant, plant operation and maintenance schedule to be submitted along with the machine.

Guarantee

The product should be guarantee for 18Months from the date of Receipt of material to our plant site or 12 months from the date of commissioning.