OIL TREATMENT ARRAS MAXEI

Transcription

1 I-BETH13GB-A page 1/5 TECHNICAL DESCRIPTION OF THE STANDARD PLANTS TYPE MAS kW 500m 3 /h SUMMARY: Principle of operation 2 Main characteristics 2 Components of the plant 2 Description of the plant 3 Operating diagram 4 Optional features 5 PREAMBLE The use with confidence of the dielectric fluids in the transformers, circuit breakers, and other types of electrical equipment depends upon some of their basic characteristics, which can affect the general operating efficiency of the electrical equipment. In order to ensure manifold functions such as an insulant, a coolant and an extinguishing medium, these dielectric fluids must have some basic properties, and especially a high dielectric strength. Now, in service, the dielectric fluids properties may be affected by the appearing of oxidation, condensation and other contaminants such as water, solid impurities and dissolved gases. Working on the principles of filtration, dehydration and vacuum degasification, MAXEI Industries Electriques oil treatment plants are particularly recoended to maintain, dry and fill your transformers and circuitbreakers. By removing the impurities, dissolved moisture and gases, they indeed enable to restore the oil dielectric properties and to extend the useful life of your electrical equipment. Used and well-known all over the world for their performance, reliability and ease of operation, our standard plants are now enriched with our latest technological achievements. Automated, fitted with remote control or telecontrol systems, our oil treatment plants are more and more autonomous, which insure you increased productivity. MAS 6000 on road trailer with metallic cover Oil treatment The oil treatment plants ARRAS MAXEI has been designed to treat dielectric oil having a 50 ppm moisture content and a dissolved gas content of approx. 10% by volume before being treated. After getting the optimal treatment conditions, the clean treated oil goes out after 1 pass at a maximum temperature of 70 C with a moisture content below 5 ppm* and a dissolved gas content of approximately 0,1% by volume*. The breakdown voltage of the oil will be in excess of 75 kv after treatment. An oil at 20 ppm will go out at 3 ppm* after 1 pass. The above figures are reached with oils having a 10-2 mbar distillation curve at a temperature of 80 C. KV Evolution of the moisture content and o f the dielectric 100 diélectric Moisture content ,1 0,01 Comparison betwenn vapor and liquid phases of moisture and dielectric oil EAU Lliquid water Vapor water T C Liquid oil HUILE Vapor oil * : Theoretical values depending on the measuring device accuracy and ranging from 2 to 5 ppm

2 I-BETH13GB-A page 2/5 Principle of operation Road trailer Low speed trailer Plant with metallic cover Plant with tarpaulin The dielectric fluid enters in the plant through an inlet strainer, and then passes through an inlet oil pump and into an oil heater, where it is heated by iersion heaters. After a fine filtration on cartridge, the dielectric fluid is sprayed into a vacuum chamber on a basket of «Raschig» rings. Finally, after the contaminants are eliminated, the clean treated fluid flows through the outlet oil pump. Foam regulation system Transformer insulating system High level detection system Main characteristics Nominal flow* during treatment in l/h 8000 Heating power in kw 110 Total power in kw 130 Filtration** by cartridges in nominal µm 1 Limit vacuum against closed suction in mbars 0,05 Vacuum during treatment in mbars 0,5 to 2 * : Approximate values. ** : Consumable cartridge with filtration expressed in µm nominal. All our plants are equipped in standard with tropicalized electrical material, for a feeding tension 400 Volts 3 phases 50 Hz and auxiliary operation in 220 Volts by transformer. (Special tensions quoted on demand) Components of the plant Voltmeter / Ampere meter Telecontrol 1 inlet oil motor-pump 1 direct electrical heater with 2 working temperatures 1 cartridge filter 1 dehydration tank 1 outlet oil vacuum motor-pump 1 double-staged vacuum motor-pump 1 set measuring, controlling, alarming, and regulating apparatus 1 control panel 1 set of pipes, valves and accessories 3 lifting rings placed on upper part of the of the degasification unit The standard plant is installed on a section iron plate with retention tray and maintenance wheels.

3 I-BETH13GB-A page 3/5 Description of the plant Heater and oil filtering system. Maxi flow of the pump in l/h Pump type Centrifugal Height of discharge in mce 40 Motor power in kw 4 1) Inlet oil motor-pump The oil inlet suction of the standard oil treatment plants are equipped with a syetrical connection (like French fire system), a strainer filter, an insulation valve, an inlet oil motor-pump and an oil sampling valve also serving as an heater drain. Pump building Cast iron/steel Rotation speed in rpm 1500 Connection diameter in 40 Total heating power in kw 110 Number of thermo dippers 14 Power of an element kw 7,8 Auxiliary heating connection 40 Number of cartridges 12 Filter building Cast iron/steel Clogging control Pressostat 2) Heater The motor-pump outlet of the standard oil treatment plants are equipped with a heater made of pipe stub heating casing, equipped with flanged iersion heater. This heater has two working temperature. The heater outlet is equipped with a safety valve adjusted at 4 bars, an overheating safety thermostat, a temperature regulation probe PT100, a heater by-pass and a manometer -1 / +5 bars. 3) Filtering system The standard oil treatment plants are equipped with a consumable cartridge filter with 1 µm nominal filtration. The filter, equipped of a clogging control, is connected to the dehydration tank. Oil degazing under vacuum. Flow of primary pump in m 3 /h 240 Limit vacuum in mbar 0,08 Motor power in kw 5.5 Rotation speed in rpm 1450 Oil capacity in litre 8,5 Flow of roots pump in m 3 /h 505 Roots motor power in kw 2,2 Rotation speed in rpm 3000 Oil capacity in litre 2,2 Vacuum measure Pirani Auxiliary vacuum connection 50 4) Dehydration tank The standard oil treatment plants are equipped with a cylindrical steel dehydration cell. It includes a spraying blockhead and a basket of dehydration rings. The upper part of the cell is equipped with an inlet oil connection, a connection to the vacuum pump, a vacuum indicator 1000 to 0 mbar and a vacuum regulation valve. The collar is equipped with a level sensor, a low tension headlight window to look at the lower part of the cell and a foam regulation system. The lower part is equipped with a flow regulation tube and a draining valve. 5) Vacuum motor-pump The standard oil treatment plants are equipped with a double-staged group composed of a pump with pales, greasing through oil circulation with filter, antireturn valve and air ballast and of a Roots pump. The group is connected to the dehydration cell by a pipe equipped with a safety valve, an insulating valve, a Pirani vacuum gauge with display and an exhaust electro-valve of the group. Maxi flow of the pump in l/h Pump type Centrifugal Height of discharge in mce 40 Motor power in kw 5,5 Rotation speed in rpm 1500 Pump building Cast iron/bronze Oil outlet. 6) Outlet oil vacuum motor-pump The outlet discharge of the standard oil treatment plants are equipped with an outlet oil vacuum motor-pump, a valve of oil sampling, an anti-return valve, an insulation valve and a syetrical connection (like French fire system). Connection diameter in 50

4 I-BETH13GB-A page 4/5 7) Control panel The standard oil treatment plants are equipped with an industrial water proof type cabinet in painted steel, with contactors, relays, fuses, connectors and wires necessar for the equipment running. On the door, there s the buttons and warning lights of the different equipment components. 8) Finishing painting The standard oil treatment plants are painted in white (RAL9002). 9) Dimensions Length in Width in High in Weight in kg Plant on platform Not proposed Plant on skid Plant on cart 3165** Plant on cart with tarpaulin 3165** Plant on cart with metallic cover 3165** Plant on road trailer with tarpaulin 3800** * Plant on road trailer with metallic cover 3800** * * : The weight is not higher for the road trailers equipped with tarpaulin or metallic cover ** : The lengths are given without the draw bar All characteristics may be modified without any prior notice.

5 I-BETH13GB-A page 5/5 Optional features Présentation 1) ROAD TRAILER WITH CEE AGREMENT In order to be portable type, the oil treatment plant can be installed on a road trailer to move the plant by road at a maximum speed of 90 km/hr. The trailer is equipped with rear lights in accordance with the EU regulations of road code. The whole installation is coissioned by the French government vehicle testing service to be allowed to circulate in France and European countries. The road trailer is composed of : - 1 frame made of iron steel, 1 steel plate, - 1 trailer coupling, adjustable vertically, with standard ring towing eye (BNA 68 42, inside diameter of the ring : 68 ), - 1 double wheel axle (4 wheels) or 2 axles with 4 wheels, placed at the centre, spring suspension, 1 air braking with ABS system in accordance with the EU regulations, - 1 park brake, 1 spare wheel, 1 adjustable front stand, 2 anti-roll stand. 2) ROAD TRAILER WITHOUT CEE AGREMENT In order to be portable type, the oil treatment plant can be installed on a road trailer to move the plant by road at a maximum speed of 90 km/hr. The trailer is equipped with rear lights in accordance with the EU regulations of road code. The whole installation is not coissioned by the French government vehicle testing service and is not allowed to circulate in France and European countries. The road trailer is composed of : - 1 frame made of iron steel, 1 steel plate, - 1 trailer coupling, adjustable vertically, with standard ring towing eye (BNA 68 42, inside diameter of the ring : 68 ), - 1 double wheel axle (4 wheels) or 2 axles with 4 wheels, placed at the centre, spring suspension, 1 air braking system not suitable with EU regulations of road code, - 1 park brake, 1 spare wheel, 1 adjustable front stand, 2 anti-roll stand. 3) CART The oil treatment can be installed on a cart with full tyres (maxi speed: 20 km/h). 4) TARPAULIN PROTECTION The plant can be equipped with a tarpaulin, which protects it from the bad weather. It can be opened on the four sides to enable the access to the components of the plant. 5) METALLIC COVER PROTECTION The plant can be equipped with a metallic cover, which protects from the bad weather. It is made of iron steel. Doors closing per key are installed to enable the access to the main components of the plant. Control process Process measures 1) INLET ELECTRO VALVE This option enables, in case of incident or any sudden treatment stopping (power cut), to insulate the plant from the electric appliance to be treated and thus to prevent from dangerous oil flowing into the oil treatment plant. 2) FLOW INVERSION OF OIL You can invert the flow direction in the transformer without disconnecting the inlet and outlet oil hoses. 3) HIGH LEVEL DETECTION SYSTEM This option enables the automatic stop of the plant, when the valve, which protects the vacuum pump, is full. This reinforced safety and avoids the transfer of the condensates in the vacuum pump. 4) VOLTMETRE / AMPEREMETRE 5) SAFETY LEVEL CONTROL ON TRANSFORMER This option is installed on the upper part of the transformer to control the variations of the oil level in this one. 6) TRANSFORMER INSULATION SYSTEM This option insulates the transformer in case of problem detected on the oil treatment plant. 1) ONLINE WATER CONTENT MEASURING OR ONLINE PARTICLES MEASURING 2) 6 CHANNEL NUMERIC RECORDER (to record temperatures, vacuum, water content, etc.) 3) OPERATOR LESS FONCTIONNING OR AUTOMATIC FONCTIONNING Transformer drying 1) CONDENSOR AND COOLING GROUP This option enables an optimal protection of the pump group in case of high water content treatment. 2) TRANSFER PUMP This option enables to increase the hoses length between the plant and the transformer. 3) HIGHER HEATING POWER The standard heating power of the oil treatment plants has been calculated for a weight ratio between oil and transformer about 4. In case of a higher ratio, we recoend to increase the heating power of the plant. 4) CONNEXION FEATURES AND ACCESSORIES 5) PULVERIZATION Telecontrol TELECONTROL GSM telecontrol or Monitoring GSM on oil treatment.