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mcc control system

update2015-03-19 11:35      Clicktimes
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    1 introduction Current oil drilling industry is gradually with international practice, both at home and abroad is becoming more and more high to the requirement of oil drilling, and drilling rig wellsite standardized explosion-proof circui

introduce
1 introduction


Current oil rig123.net' target='_blank'>drilling industry is gradually with international practice, both at home and abroad is becoming more and more high to the requirement of oil rig123.net' target='_blank'>drilling, and drilling rig wellsite standardized explosion-proof circuit system, is for oil drilling equipment and drilling at home and abroad, according to new technology, new technology and the requirement of modern drilling production, in order to prevent for electric control in the process of oil drilling equipment to produce edm, and cause of combustible gas explosion, realize high quality, efficient, safe drilling production, and integrate with the world market of new products.

rilling rig wellsite standardized explosion-proof circuit system, mainly used in oil drilling on land, offshore oil drilling platform of solids control equipment and well site electrical equipment and lighting control.The system is suitable for the environment with explosive gas mixture of 1 zone and 2 zone, explosive gas mixture class, grade A, B, T1, T4 group, as A distribution or centralized control three-phase squirrel cage induction motor start, stop, with A loss of pressure, short circuit, overload and phase failure protection function, and key parts have no load refused to switching function.

Standardization of wellsite explosion-proof circuit system has explosion-proof, waterproof and dustproof function, especially suitable for oil field environment, is the best choice for oil field drilling equipment and standardization.

Wellsite standardization of explosion-proof electrical system design and manufacturing based on "advanced, safe and reliable performance, convenient migration, economic operation and meet HSE requirements" principle.

2 control mode

Drilling rig wellsite standardized explosion-proof circuit system, based on the well site area of three-phase squirrel cage induction motor provides the power supply and control way is different, can be divided into the following three ways.

2.1 centralized control mode

So-called centralized control, to the well site is the all partitions in other areas of the ac motor starting device and power are concentrated and MCC control room, adopt independent power supply, ac motor starting, both through rapid explosion-proof splice pieces to control the power cord, power supply and by MCC plug-in tank connected to the power equipment of electric control room.Solid centralization control into the power supply and control of the power cord, also introduced by rapid explosion-proof splice pieces to the solids control at the ends of the tank explosion-proof junction box, again by explosion-proof junction box to provide transition cable solids control equipment on the surface of the jars.

Simplify the wellsite electrical control equipment, realize the centralized control of electric equipment for wellsite, focus on all the ac motor control in the well site, independent power supply, starting by twos and threes.Using MCC control room within the room central control wellsite all partitions in other areas of the power supply, ac motor and well site and explosion-proof junction box with explosion-proof type through a case to implement control mode.

Will all the power of the ac motor and control within the well site and partition in other areas of the power is concentrated with MCC control room, adopt independent power supply, both starting mode, can better facilitate personnel for wellsite electric centralized operation, convenient for observation, but also convenient for electrical maintenance and repair.

Its defect is: from the MCC electric control room too much power and control cable, is not convenient to install.From economic considerations, the overall price is slightly higher.

2.2 distributed control mode

A decentralized control, is MCC control room only provides the regional partition power (including the capacity of more than 30 kw ac motor power supply), through rapid explosion-proof plug the power the power cord, the plug-in ark of electronically controlled by MCC room connected to the electricity equipment.Well site within the capacity of more than 30 kw (excluding 30 kw) of ac motors can be started by the explosion-proof type auto voltage reducing unit close to control;Below 30 kw (including 30 kw) capacity of ac motor and other electric equipment, solid control jars of surface by solids control at the ends of the tank type flameproof combination control device and explosion-proof junction box to provide power power supply and control power.

Simple control mode, namely to provide power supply, focus on the control, implementation of decentralized control of electric equipment for wellsite.Using MCC control room inside the focus to provide solid partition power centralization, the explosion-proof type auto voltage reducing start-up device to control more than 30 kw (excluding 30 kw) capacity of ac motor, flameproof more combination control device to control below 30 kw (including 30 kw) capacity of ac motor and other electric equipment, solid control jars of surface at the same time by the junction box and switch box to realize the control mode of together.

Within the wellsite all above 30 kw (excluding 30 kw) capacity of ac motor power supply and other area partition power was concentrated by MCC control room, adopt independent power supply, on-site starting mode, you can simplify the power cable from the MCC electric control room.From economic considerations, the overall price is cheaper.

Its defect is: inconvenient personnel for wellsite electric centralized operation, due to the solid centralization control belongs to the environment of explosive gas mixture 1 zone and 2 zone, in the case of electrical failure, will have to repair, opened the lid of the flameproof enclosure for this makes explosion-proof enclosure of electrical components exposed under the environment of explosive gas mixture, makes the personnel in the maintenance of security is reduced.

2.3 half centralized control system

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