When specifying telemecanique iec contactors and starters refer to the following square d documents. The field is black oil and produces around 40kbpd and 220 mmscfd gas. This includes power contacts, auxiliary contacts, and contact springs. Pdf on mar 1, 2008, mark moore and others published.
When the start button is pressed in a magnetic starter, an electromagnet gets energized and the contactor gets engaged. Contactor article about contactor by the free dictionary. The electromagnet or coil provides the driving force to close the contacts. In semiconductor testing, contactor can also refer to the specialized socket that connects the device under test. Glycols typically seen in industry include triethylene glycol teg, diethylene glycol deg, ethylene glycol meg, and tetraethylene glycol treg. A failure of the seals between the glycol contactor and the vaporliquid separator can result in losses of teg, which would be hard to trouble shoot. The contactor can be inspected easily by removing the arc cover. Factors of contactors contact design the following factors consider while designing the contactors contacts relay, magnetic and electrical contactor trending up tp 93% off launching official electrical technology store shop now. In process industries, a contactor is a vessel where two streams interact, for example, air and liquid. Factors of contactors contact design electrical technology. Mokhatab, gas processing consultant, halifax, nova scotia, canada. Abb control secrl 2 20010619 the abb range of a the abb range of a contactorscontactors a 9, a 12, a 16 a 26, a 30, a 40 a 50, a 63, a 75 a 95, a 110 a145. Optimizing effective absorption during wet natural gas. During the contact, the teg is enriched by water and flows out of the bottom part of the contactor.
Introduction repco is the industryleading source for replacement electrical contacts for industrial motor controls. Several natural gas dehydration methods and range of. During the process, fresh lean teg enters to the absorption column at the top side. A failure of the seals between the glycol contactor and the vaporliquid separator can result in. The gas will pass through bubble trays contacting the teg solution which will remove the water vapor. Contactor k value activity coef k value a, lkv teg regenerator heat balance design current dehydrated gas, mmscfd water content, lbmmscfd rich teg in f water stripping gas in scfgal scfm temp lean teg out, gpm effluent gas out water out lbhr gas reflux in out water heat, glycol heat gas heat reflux desup, ovhd mw gas cp teg cp gas cp. A magnetic contactor works by creating a connection between the motor and the electromagnet. Estimating teg vaporization losses in teg dehydration unit. Contactor relays are often used in control and regulating functions.
Move the dehydrated gas from the top of the contactor tower. The teg process the water saturated gas feed enters the gasglycol contactor column in the bottom section via a suitable vapour distributor. Schaltbau has been manufacturing dc contactors for over 80 years. Jul 17, 2017 switch the volt ohmmeter on and to the ohms position on the front selector switch. The teg contactor, after absorbing moisture is regenerated using two columns the stripper and the regenerator. Approximate dimensions, shipping weights class 8502, 8536. Place the red lead into the ohm connector and the black lead into the common. For dehydration of natural gas by triethylene glycol teg process to a lower. Ratings of a contactor are given according to the pole of the contactor. In the contactor, wet natural gas and teg flow countercurrently.
In addition to the simplicity which they offer in project engineering, panel building, commissioning and maintenance, the high. Mini contactor terminal style contact minioverload use upper limit combination in part number nonreversing 6 6a a ac coil 24 24v 10 1 no 12 up to 12a m mini 0. Teg contactor manufacturers in pune, teg contactor. Teg enriched in water flows out the bottom part of contactor, while dry natural gas flows out to the upper part of contactor. For a non ideal mixture of water, teg and methane, one can write the. Construction contract writer craftsman book company. High losses from teg contactor posted in industrial professionals. The basics of contactors commercial electric products. Several natural gas dehydration methods and range of application. The contacts are the currentcarrying part of the contactor. Oct 14, 2018 absorption dehydration unit consists of glycol contactor, in form of tray column or packed column. The teg vaporization losses for three feed gas temperatures to contactor for stripping gas rate of 10 std m 3 m 3 teg 1. The lean teg water content is generally in the range of 0.
Insert the closed eyelet connector, and push up the screw holder. A contactor is an electricallycontrolled switch used for switching an electrical power circuit. Another heat exchanger is also added to cool the teg stream to the contactor stream, but for the purpose of this research work a. This figure indicates that as the contactor temperature increases, the. Enclosures are made of insulating materials such as bakelite, nylon 6, and. Abb ac contactor rated operational auxiliary contacts weight footprint order code current fitted kg h w d 1st stack ac3 ac1 400 v 40 c state coil voltage a a kw see table below 1 0. The teg contactor can be either structure packing or bubble cap trays. It also depends on factors like fault withstand current, coil voltage and so on.
Factors of contactors contact design the following factors consider while designing the contactors contacts relay, magnetic and electrical contactor. A contactor is an electrically controlled switch used for switching an electrical power circuit, similar to a relay except with higher current ratings. For contactor mcx 01 mcx 02 mcx 03 mcx 04 mcx 11 mcx 12 mcx 11 12 mcx 21 22 mcx 31 32 mcx 33 34 mcx 41 42 mcx 43 44 mcx 45 46 cat. Sccrs identify the level of fault current that a component or assembly can safely withstand. Contactors tesys d 184 tesys d reversing 186 tesys f 185 tesys k 1824 tesys d and f accessories 188 tesys k.
Builtin surge absorber the model with builtin surge absorber for coils is obtainable as an option. The dline contactors and overload relays are the largest selling contactor. Introduction water vapor is the most common undesirable impurity in gas streams. Numerical simulation of an industrial absorber for dehydration of. For more than 30 years repco has built a solid reputation for quality. Continue moving natural gas into the contactor tower. High losses from teg contactor industrial professionals. Herold, contributing writer, amsterdam, the netherlands. Contactor control unit solenoid fitted with varistor 3rt10 3x. Teg triethylene glycol is the primary solvent used in gas processing industry to dehydrate gases. No legal experience needed to draft residential and commercial prime and subcontracts, costplus contracts, green leed contracts, home improvement contracts, pool contracts, solar installation contracts and construction management contracts. Optimal design and operation of molecular sieve gas.
In most cases, the contactor does not simply wear out from normal use. The tower contains a structured packing bed to maximize the mixing between the gas and teg and to increase the contact time between the two substances. If the gas contains free liquid impurities it can be cleaned in a pretreatment ko drum either integrated within the column or an external vessel using a good quality mist eliminator. Optimal design and operation of molecular sieve gas dehydration unitspart 1. The usual practice is to introduce, at the top of the glycol contactor tower, a solution of regenerated glycol with a concentration ranging from 97 to 99 %, and to remove the solution from the base of the contactor tower at a glycol concentration of 80 to 90 %8. Lean regenerated glycol is introduced into the top of the column via a suitable liquid distributor to ensure a good flow of teg across the entire column area. Tesys iec contactors and overload relays making highfault shortcircuit current ratings simple the latest development in the tesys family of iec contactors and overload relays is component highfault shortcircuit current ratings sccrs. Dry teg contacts the moist natural gas and absorbs the water from it in a contactor tower. Contactor must be mounted in the vertical position on a. Four glycols have been successfully used to dry natural gas. Contactor relays contactor relays contactor relays are often used in control and regulating functions. Dec 28, 2018 a contactor connects or disconnects an electrical load. Construction contract writer creates contracts that comply with law in your state. Remove all packing material from the base and all the kits.
The basics of contactors contactors are useful in commercial and industrial applications, particularly for controlling large lighting loads and motors. C contactor a threephase starter b singlephase starter type 25 nonreversing contactors and starters c306 27 nonreversing starters xtob 30 nonreversing starters c440 eol 65 reversing contactors c 2 5 d n a 2 1 5 a a 1 6 1 8 4 contactor frame size a compact, singlepole b compact, twopole c compact, singlepole w. The moisture in teg is further soaked by recycling a small quantity of dry gas generated in the first column. Lc1dn series ac contactor ie max ac3 ue 440v ie ac1 0 60 production rated operational current 9a 12a 18a 25a 32a 38a 25a 32a 40a 50a rated operational voltage 690v number of poles 3 3 4 3 3 4 3 rated operational power in ac3 220240v. I dont think having an integral vaporliquid separator below the contactor is the most reliable system. In the stripper, moisture is removed from teg by heating generally employing a reboiler.
Pump is installed to raise the pressure of the teg stream before it enters the contactor streams. Teg, because some quantities of teg has been lost during the dehydration. Rated operational current ie at rating of induction motors at 50 hz order no. Start by answering a series of interview questions. Glycol dehydration is a liquid desiccant system for the removal of water from natural gas and natural gas liquids ngl. For remote controlling circuit making, breaking and frequent starting ac motors. According to their rating, contactors are classified into the following. Dehydration of natural gas using triethylene glycol. Place the red lead to the l1 and the black lead to t1. Molecular sieve technology is widely used for the simultaneous removal of water and mercaptans from both gas and liquid feed streams.
Absorption dehydration unit consists of glycol contactor, in form of tray column or packed column. They are used in large quantities for the indirect control of motors, valves, clutches and heating equipment. Unlock your applications with a wide range of controlgear. One other option to the tray teg contactor is the use of structured. Lp1d series dc operated ac contactor is suitable for use in the circuits up to rated voltage 660v ac 50hz or 60hz,and in rated current 995a in ac3380v load circuits.
With no stripping gas to the reboiler, the expected lean water content of teg is about 1. An optimized teg contactor design, when determined in the early project stage, will bring significant weight, space, and cost savings. If the gas contains free liquid impurities it can be cleaned in a pretreatment ko drum either integrated within the column or an. Dehydration with triethylene glycol teg is effective and has been successfully employed in both onshore and offshore facilities. The enclosure is a frame housing the contacts and the electromagnet. The issue is that losses from the bulk contactor are particularly.
Our contactors can handle 50a250a and are rated for v usage. Contactor relays 52 contactors dil, overload relays z 58 contactors dil 514 overload relays z 520 zeb electronic overload relay 523 zev electronic motorprotective system 526 thermistor overload relay for machine protection emt6 533 cmd contactor monitoring device 536. The contacts are the current carrying part of the contactor. However, like any other device, they are not infallible. Sales contactor product line contactor selector guide pdf contactor datasheets. Teg contactor manufacturers in pune, teg contactor suppliers. This figure indicates that as the contactor temperature increases, the teg vaporization loss from the regenerator top increases. Deg, triethylene glycol teg and tetraethylene glycol. It is the most common and economical means of water removal from these streams. The industrial absorption dehydration process proceeds in a glycol contactor a tray column or packet bed.
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