Transformer / Insulating Oil Filtration and Dehydration Plants / Purifiers are available for:

1. Transformer and capacitor manufacturers – skid mounted plants for preparation of new oils prior to apparatus filling and impregnation.
2. Transformer repairers -- complete plants for preparation of new oils and regeneration of used oils for reuse. We can provide the purification system you need as well as vacuum storage tanks and transformer filling and emptying / pumping station.
3. Transformer owners -- portable plants are available in a variety of trailer-types and sizes to allow on-site servicing of transformer oil right in the substation. Trailers are available with a wide variety of options including laboratory space, oil-testing equipment. Plants are designed for drying out of the transformer insulation and oil filling and impregnation under vacuum. Hot oil circulation and hot oil spray methods can also be used.

Working Systems

HEATING SYSTEM :

• It is capable of heating the oil from 25°C to 80°C. It contains Insulated heat exchanger with indirect low watt density (Less than 2W/cm2) bobbin type electric heaters. Oil temperature is controlled with thermostat. Suitable oil distribution system is provided to ensure uniform flow of oil over heaters. It will be provided with:
• Indirect Type Heating Elements made out of Nichrome wire elements fixed in refractory formers and inserted in finned MS tubes welded to heater chamber plate. Watt Density will be less than 2 Watts / cm2.
• Temperature Control: Thermostatic
• Temperature Indication: Dial Stem Type Thermometer.
• Thermal Insulation: Glass Wool enclosed with CRCA sheets.

FILTRATION SYSTEM :

• PRE FILTER: is a metallic strainer with magnet. It removes magnetic and coarse suspended particles and to protect inlet pump from damage due to abrasion.
• FINE FILTER: removes all suspended particles up to < 1 micron. Filter Elements are either non-hygroscopic molded cellulose cartridges or cleanable (with reverse airflow) edge type filter candles. Filter cartridges are easily replaceable. Additional Intermediate filter is provided to increase life of fine filter elements.

DEGASSING & DEHYDRATION CHAMBER :

• Shower arrangement and Raschig ring trays for formation of thin oil film to get more exposure of oil to vacuum.
• Siphon seal to ensure longer travel of oil during degassing (for 2V plants)
• Sight glasses, illuminating lamps and float switch to control oil level.
• PRV before degassing chamber & SCV after Outlet Pump will be provided to avoid flooding of degassing chamber in case of power failure.

VACUUM SYSTEM :

It will consist of following components:
FOR FIRST STAGE OF DEGASSING:
VACUUM PUMP: Rotary Oil Sealed Pump with following specifications: 
Free air displacement -*** LPM. 
Make - M/s Indo-Woo sung or similar 
Electric Motor – ** H.P. Foot Mounted,
Working Vacuum - < 5 torr, Ultimate vacuum - < 0.005 torr
FOR SECOND STAGE OF DEGASSING (ONLY FOR 2V PLANTS):
ROOTS PUMP: FREE AIR DISPLACEMENT: *** M³/Hr
Make – M/s Everest or similar
Electric Motor – ** H.P. Flange Mounted
VACUUM PUMP: Rotary Oil Sealed Pump with following specifications: 
Free air displacement - *** LPM. 
Make - M/s Indo-Woo sung or similar 
Electric Motor – ** H.P. Foot Mounted,
Working Vacuum - <0.1 torr, Ultimate vacuum - 0.001torr

GAUGES AND INSTRUMENTS :

• Pressure Gauge: 0 – 7 Kgf / cm², Glycerin filled Bourdon Dial type Ø 63 / 100 mm, M/s Shreeji or similar make.
• Thermometer: 0-150°C, Dial stem type. Ø 63 / 100 * 150 mm stem Length, M/s Shreeji or similar make.
• Thermostat: 30-110°C, Capillary type. Sai-Ego or similar make.
• Float Switch: Float operated magnetic reed switch, RS Model, M/s Sukrut make.
• Vacuum Gauge: 0 – 760 mm of Hg Bourdon Dial Type Ø 63 / 100 mm, M/s Shreeji or similar make
• Digital Vacuum Gauge – Ace Instruments make.(Only for 2V plants)

VALVES AND PIPING :

• Oil Valves:  ** NB Ball type valves with seals suitable for under vacuum operation. Itap Italy, R / N USA or similar make.
• Drain Valves: 15 & ** NB Ball type valves with seals suitable for under vacuum operation. Itap Italy, R / N USA or similar make.
• Airing Valve: Quick Release types 10 NB, AR Engineering Make. Solenoid valve (for 2V plants).
• Flow Control Valve: Needle or Piston type, AR Engineering Make.
• Vacuum Valve: ** NB Ball type valves with seals suitable for under vacuum operation. Itap Italy, R / N USA or similar make.
• Swing Check Valves – ** NB Ball type valves with seals suitable for under vacuum operation. Itap Italy, R / N USA or similar make.
• PRV - ** NB Ball type valves with seals suitable for under vacuum operation. Itap Italy, R / N USA or similar make.
• Pipe Connections: Flange type with synthetic rubber O-ring. AR Engineering Make
• Inlet and Outlet Hoses: ** NB Synthetic Rubber reinforced or nylon braided with quick coupling.

CONTROL PANEL :

• Inlet Pump – Heaters: Heaters will not be ON unless inlet pump is ON.
• Float Switch – Inlet Pump: Inlet Pump will be off when oil level rises.
• Thermostat – Heaters: Heaters will be off when temperature rises.
• Booster pump – Vacuum gauge relay – Booster is ON only when vacuum is < 50 torr ( Only for 2V plants )

Optionals:

IONIC REACTION COLUMN :

TRANSFORMER EVACUATION SYSTEM :

It will be suitable for working vacuum of either 5 – 10 torr or 0.1 – 0.5 torr. It will be provided with Rotary Oil Sealed Pump or Roots Rotary combination along with Moisture Traps (water cooled) with drain, airing valve, NRV, Vacuum Gauge will be provided as per the schematic diagram.

Plant Can Be Supplied With Followings :

• BDV TESTING KIT
• ON LINE MOISTURE MEASUREMENT KIT
• ACIDITY TESTING KIT
• FLOW METER

Points For Selection Of Plants :

• RANGE OF SIZES OF TRANSFORMERS : FLOW RATE IS DECIDED
• LOCATION OF TRANSFORMERS TO BE FILTERED: MOUNTING & CONSTRUCTION TYPE IS DECIDED.
• REQUIREMENT OF OIL QUALITY & TIME AVAILABLE FOR FILTRATION & DRYING: WORKING VACUUM IS DECIDED
• WORKING VACUUM: SINGLE OR TWO STAGE DEGASSING IS DECIDED

How To Configure The Model :

T TRANSFORMER OIL Mineral & synthetic insulating oils

O E OPEN ENCLOSED Machine without any canopy Machine enclosed in CRCA canopy

P M S PORTABLE MOBILE STATIONARY Machine mounted on base frame with small CI castor wheels Machine mounted on pneumatic wheeled trailer with toeing arrangements Machine mounted on vehicle or at work place permanently

1V	2V
SINGLE STAGE DEGASSING	DOUBLE STAGE DEGASSING
Working vacuum less than 5 torr	Working vacuum less than 0.5 torr

X

FLOW RATE

Indicates flow rate = 10 X

T-EM-2V-600 Model means Plant is for transformern oil filtration (T) nclosed in CRCA canopy (E), mounted on< trailer (M) with 2-stage degassing system(2V) having flow-rate = 6000 LPH (600 x 10)

OPEN STATIONERY MODEL- Suitable for indoor fixed place operation.
ENCLOSED STATIONERY MODEL – Suitable for permanent mounting on vehicle.
OPEN PORTABLE MODEL – Suitable for indoor movable operation. Small plants are suitable for carrying in the vehicle for on-site operation.

ENCLOSED MOBILE – Suitable for towing with the vehicle and on-site operation. 

Technical Details for Two Stage Degassing Plants (Model - 1V)
WORKING VACUUM: < 2 Torr; ULIMATE VACUUM: 0.005 Torr
FLOW RATE		LPH	300	600	1200	1800	2400	3000	4500	6000
MOTOR POWER	INLET	HP	0.25	0.5	0.5	1	1	1.5	2	5
	OUTLET	HP	0.5	0.5	1	1	1	3	5	5
	VACUUM -1	HP	0.5	0.5	1	1	1	2	2	5
	VACUUM-2	HP	-	-	-	-	-	-	-	-
	BOOSTER	HP	-	-	-	-	-	-	-	-
HEATER POWER	HEATER-1	TOTAL kW	3	6	18	18	18	18	36	24
		NOS x kW	1 x 3	2 x 3	6 x 3	6 x 3	6 x 3	6 x 3	9 x 4	6 X 4
	HEATER-2	TOTAL kW	-	-	-	18	27	27	36	24
		NOS x kW	-	-	-	6 x 3	9 x 3	9 x 3	9 x 4	6 X 4
	HEATER-3	TOTAL kW	-	-	-	-	-	-	-	36
		NOS x kW	-	-	-	-	-	-	-	9 X 4
	TOTAL (kW)		3	6	18	36	45	45	72	84
VACUUM PUMP DISPLACEMENT	VACUUM-1	M3/HR	6	10.8	18	36	36	60	60	90
	VACUUM-2	M3/HR	-	-	-	-	-	-	-	-
	BOOSTER	M3/HR	-	-	-	-	-	-	-	-
FILTER ELEMENTS (1 µm)		Ø63 X 500L	0.5	1	2	3	4	4	7	10
SUITABLE FOR TRANSFORMERS UPTO			750kVA	1 MVA	5 MVA	15 MVA	25 MVA	50 MVA	75 MVA	100 MVA

Technical Details for Two Stage Degassing Plants (Model - 2V)
WORKING VACUUM: < 0.3 Torr; ULIMATE VACUUM: 0.001 Torr
FLOW RATE		LPH	3000	4500	6000	8000	10000	12000
MOTOR POWER	INLET	HP	1.5	2	5	7.5	10	10
	OUTLET	HP	3	5	5	7.5	12.5	12.5
	VACUUM -1	HP	1	1	2	5	7.5	7.5
	VACUUM-2	HP	1	2	5	7.5	7.5	7.5
	BOOSTER	HP	1	2	2	5	5	5
HEATER POWER	HEATER-1	TOTAL kW	27	36	36	36	36	36
		NOS x kW	9 X 3	9 X 4	9 X 4	9 X 4	9 X 4	9 X 4
	HEATER-2	TOTAL kW	27	36	36	36	36	36
		NOS x kW	9 X 3	9 X 4	9 X 4	9 X 4	9 X 4	9 X 4
	HEATER-3	TOTAL kW	-	-	36	36	36	36
		NOS x kW	-	-	9 X 4	9 X 4	9 X 4	9 X 4
	HEATER-4	TOTAL kW	-	-	-	24	24	36
		NOS x kW	-	-	-	6 X 4	6 X 4	9 X 4
	TOTAL (kW)		54	72	108	132	132	144
VACUUM PUMP DISPLACEMENT	VACUUM-1	M3/HR	18	36	60	90	120	120
	VACUUM-2	M3/HR	36	60	90	120	120	120
	BOOSTER	M3/HR	150	375	500	1000	1000	1000
FILTER ELEMENTS (1 µm)		Ø63 X 500L	4	7	10	12	16	18
SUITABLE FOR TRANSFORMERS UPTO			75 MVA	150 MVA	250 MVA	350 MVA	400 MVA	500 MVA