1500 Installation Manual - Spec
Contents
1. 5400 Relay 40 Volt 40 or 90 Volt 90 Volt Condensate Ordinary Water D I Water Corn Syrup Corn Cream Style Ethylene Glycol Ferric Chloride Ferrous Sulphate 480 Volt Use 5200 H Relay 480 Volt Use 5200 H or 5400 Relay 90 or 220 Volt 220 Volt AMETEK AUTOMATION amp PROCESS TECHNOLOGIES With nearly 50 years of experience B W has compiled a history of applications in most major industries around the world If you have questions regarding the proper relay selection write us phone us or send a sample for test Chances are that we have the answer for you Typical Liquids The following recommendations are satisfactory for general use but because the conductivity of liquids varies greatly with concentration purity temperature and other factors some applications may require a different selection A number of the products listed are produced as solids such as crystals or powers and our relay selection is based on the normally used commercial solutions of these materials Liquid Description Formaldehyde Formic Acid Up to 75 75 to 90 Glycerine Glycerol Hydrochloric Acid Hydrofluoric Acid Up to 20 Above 20 Hydrofluorsilicic Acid Hydrogen Peroxide Jams amp Jellies Juices Fruit amp Vegetable Lemon Oil Essence Lignite Lithium Chloride Magnesium Hydroxide Mayonnaise Methanol Methyl Ethyl Keystone MEK Secondary Coil Use 5200 H Relay Use 5200 H Relay 40 Volt 220 Volt2. LOADCIRCUIT A CLOSED BELOW THIS LEVEL B OPEN 1500 E Relay sae Same as 1500 B Relay above Single Electrode Wiring a acca except that an additional Normally Contact Arrangement O pk Seen Closed contact is provided to permit Normally Normally Holding ia taBiaa ae LDC RCUIT simultaneous operation of different types of secondary signal devices in remote locations Open Closed Circuit ELECTRODE 0 2 0 gt croup HOLDER LOADS A amp B OE ENERGIZED ABOVE THIS LEVEL ELECTROOE LOAD GIRGUIT A amp B OPEN ABOVE THIS LEVEL ELEC TROCE LOADS A amp B ENERGZED BELOW THIS LEVEL LOAD CIRCUIT A amp B CLOSED BELOW THIS LEVEL 1500 C Relay Pump Down Control for sewage and Two Electrode Wiring sump pumps condensate return Contact Arrangement Cee mmc system etc Low Level Cutoff for Normally Normally Holding Open Closed Circuit 1 0 1 LOAD ENERGIZED ABOVE THIS LEVEL LOAD DE ENERGIZED BELOW THIS LEVEL 1 l ELECTRCOE HOLDER wooncurcwespseonerusiee _4 i ELECTRODE LOAD GIRG UIT OPEN BELOW THIS LEVEL submersible pumps Normally closed Solenoid Valve Control for discharging liquids from tanks etc Pump Up Control for supply pumps ate Wiring on elevated tanks and towers car Contact Arrangement reegen bonators etc High Level Cutoff for Normally Normally Holding Open Closed Circuit 0 1 1 LOAD ENERGEED BELOW THIS LEVEL LOAD GIRGUIT OPEN ABOVE THIS LEVEL LOAD GIRGUIT CLOSED BELOW THIS LEVEL pumps and val
3. stations Remote long distance and low voltage manual control Open Closed Circuit applications etc 0 1 0 esi D HOLDER i E HOLDER i LOAD DE ENERGIZED ABOVE THIS LEVEL ELECTRODE LOAD CIRCUIT OPEN ABOVE THIS LEVEL E ECTRODE LOAD ENERGIZED BELOW THIS LEVEL LOAD CIRCUIT CLOSED BELOW THIS LEVEL 1500 C Relay O O Same as 1500 A Relay above Single Electrode Wiring TE except that an additional Normally Contact Arrangement G O PENA Open contact is provided to permit Normally Normally Holding m m o a ee m e mo LOAD CIRCUIT simultaneous operation of different types of secondary signal devices Open Closed Circuit in remote locations 2 0 0 GROUND p KOLDER dnus F HOLDER LOADS A amp B ENERGIZED ABOVE THIS LEVEL ELECTROOE LOAD CIRCUIT A amp B CLOSED ABOVE THIS LEVEL SS nce LOADS A B DE ENERGIZED BELOW THIS LEVEL LOAD CIRCUIT A amp B OPEN BELOW THIS LEVEL 1500 D Relay High or Low Level Signal Control Single Electrode Wiring High of Low Level Cutoff when Contact Arrangement wired in series with Stop button in 3 Normally Normally Holding Os l rosaa wire pushbutton stations Can also be used to interlock various types of i ig ee rn ae LOD CREUT Open Closed Circuit i signal devices aay ELECTROCE 1 1 0 cROUND HOLDER LOAD A DE ENERGIZED ABOVE THIS LEVEL B ENERGZED ELECTROCE LOADCIRCUIT A OPEN ABOVE THIS LEVEL B CLOSED ELECTROCE LOAD A ENERGIZED BELOW THIS LEVEL 6 DE ENERG ZED
4. 40 VAC Heavy Duty Pilot 120 to 600 VAC 2 Amp Resistive at 120 VDC 10 Amp Resistive at 48 VDC Typical Liquids 12 Volts A C Metallic circuits S 24 Volts A C S Metallic circuits Acid or caustic solutions Milk Brine and salt solutions Plating solutions Buttermilk Soups Weak acid or caustic solutions Beer Baby foods Fruit juices Sewage Most water except very soft Pottery slip Water soluble oil solutions Starch solutions 360 Volts A C Very soft water Sugar syrup S9 480 Volts A C Steam condensate Strong alcohol solutions S11 800 Volts A C Demineralized or distilled water Enclosure Type Open Chassis 1 NEMA 1 General Purpose Additional Options M Manual Push Button NEMA 4 Weather Proof N4X NEMA 4X Corrosion Resistant N7 NEMA7 Classified Location N12 NEMA 12 Oil Tight Service Instructions CAUTION Be sure to disconnect relay control power before servicing electrodes or electrode holders B W relays are designed and built to require a minimum of service in the field Each one is tested and adjusted at the factory to insure positive operation and should not be altered or tampered with prior to installation If a relay does not operate properly after it has been installed the following information will be helpful in determining the probable cause A Relay Will Not Pull In If relay will not pull in when liquid contacts upper electrode failure to op
5. D Relays It is also suitable for use in controlling hydropneumatic tanks and motor ized valve installations Same as 1500 D Relay above except that additional Normally Closed contact is provided to permit simultaneous operation of second pump Extra contact can also be used for signal purposes if desired CAUTION Electrodes are terminals of live electrical circuits and must be installed to prevent accidental contact by personnel Control power must be disconnected before servicing A GOOD DEPENDABLE GROUND RETURN CONNECTION TO THE LIQUID IS REQUIRED CONTACT ARRANGEMENT DIRECT OPERATION 1500 F Relay Two Electrode Wiring Contact Arrangement Normally Normally Holding Open Closed Circuit 2 0 1 LOADS A amp B ENERGIZED ABOVE THIS LEVEL 1500 G Relay Two Electrode Wiring Contact Arrangement Normally Normally Holding Open Closed Circuit 1 1 1 LOAD A DE ENERGIZED ABOVE THIS LEVEL B ENERGIZED 1500 H Relay Two Electrode Wiring Contact Arrangement Normally Normally Holding Open Closed Circuit 0 2 1 LOADS A amp B DE ENERGIZED ABOVE THIS LEVEL 1500 A L1 Open Closed i A 1 fad Section Arrangements KA Bio KEJ Dfi CEA HEA eS MES All contacts rated at po zm E Catalog Numbering System 7 1 2 4 Dual Voltage 120 240 Volts 50 60 HZ Secondary Coil Voltage 3 40 Volts A C 90 Volts A C 220 Volts A C 25 Amp Resistive at 120 240 or 480 VAC 1 HP Single Phase at 120 or 2
6. E UU U U B W Controls LIQUID LEVEL TECHNOLOGY 1500 Series INSTALLATION amp SERVICE MANUAL 1500 Induction Control Relays US MH8616 Principle of Operation A B W oatless liquid level control system consists of a relay of the proper type a holder designed to support one or more electrodes or probes in the liquid container and the corrosion resistant electrodes themselves In as much as all B W induction relays are quite similar differing only in contact arrangement the following description of how a 1500 C Relay functions on a pump down control application will serve to explain the design construction and operating principles for the entire line As shown in diagrams below the laminated core of the relay is H shaped The primary coil is assembled to the upper bar of the core and the secondary coil for the electrode is placed on the lower bar An armature located below the legs of the core is connected to an insulated arm carrying the movable contacts When the armature is raised these contacts close or open the motor and electrode circuits depending upon whether the contacts are normally open or closed Contacts shown normally open in this example When a source of alternating current is connected to the primary coil at terminals 3 and 4 the primary coil sets up a magnetic UX which circulates through the shortest path following the lines of least resistance As shown in Figure 1 this is through t
7. Use 5200 H 5300 or 5510 Relay 40 or 90 Volt Use 5200 H Relay 220 Volt Use 5200 H or 5300 Relay Use 5200 H Relay Molasses Muriatic Acid Mustard Nitric Acid Orange Juice Paper Stock Penicillin Phosphoric Acid Plating Solutions Salts Chemical Sodium Carbonate Soda Ash Sodium Chloride Table Salt Sodium Hydroxide Caustic Soda Sodium Hypochlorate Sodium Silicate Water Glass 40 or 90 Volt 220 Volt 40 or 90 Volt 40 or 90 Volt 40 Volt Starch Solutions Sugar Low Concentrations High Concentrations Sulphuric Acid Vinegar Water 220 Volt 360 Volt 90 Volt Ordinary Potable Ordinary Soft Ordinary Condensate Purified Distilled Purified Deionized Zinc Chloride 360 Volt 480 Volt 800 Volt or 5200 H Relay Use 5200 H Relay 40 Volt Copyright 2005 by AMETEK Automation amp Process Technologies 511 1080 N Crooks Road Clawson MI 48017 Toll Free 800 635 0289 Phone 248 435 0700 Fax 248 435 8120 www AMETEKAPT com 1500 M4R 02 05 Z145 10M
8. ainage sumps make sure electrodes are hung far enough apart so that foreign matter floating on water cannot foul electrodes Size 18 or larger Type TW or THW wire is recommended for connection to the relay CAUTION Although the electrodes are connected to a low energy secondary coil output which has inherently low current there may be up to 800 volts between the electrodes or from an electrode to ground See Secondary Coil Table Thus wiring and electrodes should be installed to protect personnel from accidental contact Ground Asystem ground return circuit is required from the indicated relay terminal to the liquid in order to complete the secondary circuit of relay Conduit should not be used Instead connection should be made directly to uninsulated metal tank or to metal pipe connected to tank below normal low liquid level In wells connect ground to pump or metallic water pipe For concrete wood or insulated tanks use an extra common electrode extending slightly below the longest operating electrode Secondary Coil Because the secondary voltage on all B W relays is an induced voltage generated within the relay itself the secondary coil should never be connected to any source of power Voltage of the secondary coil installed on a given relay is determined by conductivity of liquid to be controlled Load Connections B W relays are two wire control devices having load contacts rated at 1 hp single phase 115 or 230 volt
9. allation instructions 4 Broken Wires A broken wire from relay to either electrode will prevent relay from operating Broken wires can be checked by shorting the upper and lower electrode leads together at the electrode holder If relay fails to pull in one or both of the electrode leads is open The individual leads can then be checked by running a temporary wire from the relay to holder outside conduit If relay pulls in it may be assumed that break is between the holder and the electrodes This can be checked by shorting between the electrode tips with an insulated jumper 5 Low Secondary Voltage If the secondary coil voltage is too low for the resistance or conductivity of the liquid being controlled the relay will not pull in or it will buzz and chatter before pulling in In either case the relay should be replaced with one which has a higher voltage secondary coil See Table If in doubt about proper coil selection furnish factory with details on liquid or send sample for test 6 Fouled Electrodes Accumulation of dirt grease or other deposits on the upper electrode will insulate it and prevent relay from pulling in If this occurs the electrodes should be inspected and cleaned at regular intervals as required to eliminate the difficulty If unusual quantities of oil grease or sludge and encountered the electrodes can be mounted inside a pipe that is flushed with clean water A 4 pipe should be used with the bottom
10. ased slightly by interchanging the ground and lower electrode connections at the relay If this does not correct the condition the relay should be replaced with one having a higher voltage secondary coil C One Level Operation If a relay operates at one level only starting and stopping at one electrode check the following 1 Electrode Wires If wires between relay and electrodes are interchanged relay will not operate over range in level but from upper electrode only To correct simply reverse connections either at relay or at electrodes 2 Ground Connection Poor ground connection will prevent holding circuit from functioning and cause relay to operate from the upper electrode only This can be easily corrected by making sure that ground connections conform with Installation Instructions 3 Holding Circuit If the holding circuit is not closing the relay will operate from the upper electrode only Since the holding circuit contact carries only a small current a slight film of grease or dirt can sometimes prevent proper closure To correct rub contact surface with a clean paper Do not use sand paper or emery cloth 4 Upper Electrode Lead A ground in lead wire to the upper electrode will cause relay to operate from lower electrode only This condition can be checked out as described below D Relay Will Not Drop Out If relay will not drop out when liquid falls below lower electrode check the following points 1 Low
11. er Electrode Lead A ground in the lead wire from relay to lower electrode will prevent relay from dropping out on low liquid level If distance from holder to relay is relatively short the best way to check for a ground is to connect a replacement wire from relay to the electrode holder outside the conduit and test the relay for operation If it drops out properly it is safe to assume that a ground exists in the original lower electrode lead wire If relay is located a considerable distance from electrode holder check for ground as follows Disconnect power to relay Remove wires from terminals in electrode holder and allow them to stick up to eliminate possibility of contacting a grounded part Then turn on power to relay If relay pulls in a short is indicated between the electrode leads from both electrodes to ground or secondary coil is shorted internally If relay does not pull in short secondary coil with piece of insulated wire by bridging between relay terminal connections for upper and lower electrodes Relay should pull in when this connection is made and drop out when connection is broken If relay does not drop out a short to ground is indicated in lower electrode lead This ground may not be enough to pull in relay but it can be sufficient to hold relay in once it has been closed in normal operation If any of these conditions exist disconnect power to relay and replace grounded wires 2 Electrode Holder Excessive dirt or m
12. erate is probably caused by one of the following conditions 1 Power Failure A power failure to relay can be caused by broken wire blown fuse an open switch loose screw corroded connection etc Check for power failure with voltmeter or test light directly on relay line terminals No 3 and 4 on all B W relays Also check voltage at motor starter line terminals and overload heaters on motor starter to be sure they have not tripped 2 Open Coils Coils used in B W relays very rarely fail unless struck by lightning or subjected to some severe over voltage condition To check coils disconnect electrode connections from relay terminals apply line voltage to the primary coil and touch both ends of secondary coil with an insulated jumper wire Relay should pull in when the jumper is connected and fall out when the jumper is removed Failure to do so indicates that one of the coils is open If an open coil is found contact dealer or the factory for a replacement relay 3 Poor Ground Connections B W induction relays that operate from a single electrode i e Types 1500 A C B E and D will not function unless a good dependable ground connection is made to complete the secondary circuit from one end of the secondary coil through the electrode and liquid and back through ground to the other side of the secondary coil If such a relay does not operate when liquid contacts the electrode check ground connection to be sure it complies with inst
13. he lower bar of the laminated core on which the secondary coil is mounted This magnetic Lux induces a voltage in the secondary or electrode circuit coil No current can Low in this coil however until the circuit is completed between the electrodes Thus the electrode circuit voltage being generated within the relay has no connection with the power line The B W 1500 induction relay utilizes the liquid as an electrical conductor to complete the secondary circuit between the upper and lower electrodes Thus when the liquid contacts the upper electrode the resulting Low of current in this circuit sets up a bucking action in the lower bar of the core This action tends to divert lines of magnetic force to the core legs and sets up an attraction that pulls the armature in to contact with the legs as shown in Figure 2 This armature movement closes the electrode and load contacts The lower contacts on 1500 C Relays terminals 9 and 10 connect the secondary circuit to ground when liquid contacts the upper electrode and act as a holding circuit to maintain the relay in its closed position until the liquid falls below the lower electrode This holding circuit provides control of the relay over any desired range in the liquid level depending on the distance between the upper and lower electrodes The Low of current through the low energy secondary circuit is very small and varies with the voltage of the secondary coil The seconda
14. install the stationary contacts facing in toward the top of the relay away from the armature For a N O contact install the stationary contacts facing toward the bottom of the relay toward the armature CONTACT ARRANGEMENT CODE A B C D JE F G JH JJ 1 N O 2N 0 1N 0 3N 0 2N 0 1NO NC 1N C 2N c inc 2N C 3N c S Rasa E E T E AA A MIDDLE CONTACT ara aa anassa H HA HAHA A E E a eassa E E H EH FE H EH HH a INDUCTION RELAY WIRING DIAGRAM AND OPERATION TYPICAL CONTACT APPLICATIONS ARRANGEMENT DIRECT OPERATION PILOT OPERATION 1500 A Relay Eia High Level Signal Control Low Single Electrode Wiring prams 3 Level Cutoff when wired in series Contact Arrangement ai O o with Stop button in 3 wire pushbut Normally Normally Holding Fa he EA o ton stations Remote long distance and low voltage manual control applications etc Open Closed Circuit ELECTRODE ELECTRODE q 0 0 scrouno T Jennin crouno HOLDER LOAD ENERGIZED ABOVE THIS LEVEL BECTRODE LOAD CIRCUITG LOSED ABOVE THIS LEVEL BECTRODE LOAD DE ENERGIZED BELOW THIS LEVEL LOAD CIRGUITOPEN BELOW THIS LEVEL 1500 B Relay Low Level Signal Control High sit bi 43 12 l Single Electrode Wiring Bo Level Cutoff when wired in series AE eee 4 i n n Contact Arrangement Li ene a _ with Stop button in 3 wire pushbut Normally Normally Holding O O L Se LOA D CIRCUIT ton
15. located below the lowest water level and vent holes provided at top so that the level inside and outside the pipe will be the same Asmall flow of water entering the top of the pipe will cause an outward flow of water from the bottom of the pipe and prevent undesirable material from entering Thus the electrodes have a clear surface on which to operate and will stay clean 7 Electrodes Too Short It is possible for an installation to be completed in which the upper electrode is suspended at a point where the liquid cannot make contact All installations should of course be checked to make sure that proper electrode lengths are provided B Noisy Relay Operation If the relay functions properly but is noisy in operation it could be caused by the following 1 Poor Electrode Connections If wire suspended electrodes are used and have either been lost or not properly connected resultant increase in resistance is secondary circuit may cause relay to buzz or chatter in operation This condition can be corrected by checking to see that proper electrode connections are made Excessive accumulation of dirt grease or other deposits on the electrodes can also result in noisy relay operation in which case periodic cleaning will eliminate the problem 2 Low Secondary Voltage If resistance of the liquid being controlled is at the upper end of the sensitivity range of the relay secondary coil noisy operation may result Sensitivity may be incre
16. megohms resistance The vapor above some liquids is considered an explosive hazard and in these cases the B W Series 53 relay with FM approved intrinsically safe sensing circuit should be used See Catalog Section 5300 Liquids such as milk and beer and some pharmaceutical products will foam during processing The liquid phase is always a better conductor than the foam and when the interface level is to be detected the relay sensitivity must be carefully selected and it would be well to check the factory for our recommendation Liquid Description Acetic Acid Up to 75 75 to 90 Secondary Coil 220 Volt Use 5200 H Relay Acetone Use 5200 H 5300 or 5400 Relay Acids General Anhydrous Alcohols Alkalies General Anhydrous Alum Solutions Aluminum Sulphate Aluminum Hydroxide Amino Acids Ammonia Anhydrous Liquid Ammonium Chloride Ammonium Hydroxide Ammonia Ammonium Nitrate Ammonium Sulphate Baby Foods Barium Chloride Barium Nitrate Beer Black Liquor 40 or 90 Volt Use 5200 H Relay Use 5200 H 5300 or 5400 Relay 40 or 90 Volt Use 5200 H or 5400 Relay Use 5200 H Relay Use 5300 or 5400 Relay Borax Up to 10 Greater than 10 Boric Acid Bread Dough Buttermilk Cadmium Chloride Cake Batter Calcium Chloride Calcium Hydroxide Carbolic Acid Up to 90 90 to 100 Catsup Caustic Soda Sodium Hydroxide Cement Slurry Chromic Acid 24 or 40 Volt 220 Volt 220 Volt 220 Volt Use 5200 H or
17. oisture over insulation at electrode holder or electrodes can cause faulty relay operation Interior of electrode holder and its underside should be kept clean and dry Conduit connections should be made so that no condensation can enter holder Underside of vertically mounted holders should never come in contact with the liquid Insulated rod electrodes should be used with horizontally mounted holders Electrodes should be kept relatively clean and free of dirt or grease Check them periodically to make sure they do not become fouled with floating debris or insulating deposits 3 Length of Lead Wires On installations with excessive distance over 900 feet between relay and tank relay may tend to hold in due to capacitance in electrode lines and fail to drop out when liquid leaves lower electrode Since there are a number of ways to achieve reliable long distance control complete information regarding such applications should be submitted to factory for recommendations Conductive Liquids With the exception of products such as oil gasoline animal fats and other similar products most liquids and some moist bulk materials have sufficient conductivity to use B W level detecting relays The Series 1500 relay can be used on liquids with resistance up to about 90 000 ohm cm conductivity to 11 micromho cm For liquids with higher resistance the B W Series 52 relay described in Catalog Section 5200 must be used for applications up to 12
18. ry coil is selected to operate over the resistance of the liquid being controlled Accordingly since there is a wide range of secondary coils from which to choose it is important that complete information regarding the nature of the liquid be furnished when ordering B W induction relays 1500C Relay Used for Pump Down Control TO MOTOR STARTER ARMATURE PUMP START ELECTRODE GROUND A GOOD DEPENDABLE GROUND RETURN CONNECTION TO THE LIQUID IS REQUIRED PUMP STOP ELECTRODE Figure 1 Secondary coil circuit open armature down A C LINE w Bill ca AY J Seo e a BAE FLUX TO MOTOR STARTER GROUND A GOOD DEPENDABLE GROUND RETURN CONNECTION TO THE LIQUID IS REQUIRED Figure 2 Secondary coil circuit closed armature up 1 Spec Tech Industrial 203 Vest Ave Valley Park MO 63088 Toll Free 888 SPECTECH Email sales spectechind com www spectechind com Installation Instructions Relay Install relay in level upright position Connect wires from AC supply to terminals 3 and 4 on relay Make sure power is of same rated voltage and frequency as shown for connection to primary coil on relay data plate Relays draw 9 volt amperes Electrodes Install electrodes in tank or well by suspending them vertically from an electrode holder or some other suspending means One electrode should be set at desired start level and one at desired stop level For sewage or surface dr
19. s AC or standard duty pilot rating up to 600 volts AC In operation load contacts act as a switch to open or close a circuit Connecting them to an external load does not introduce a source of alternating current into the circuit Accordingly in making connections for direct operation of single phase loads within rated capacity of relay power connections must be made as shown in relay wiring diagram To operate higher rated single phase loads or three phase loads a magnetic starter must be used In making connections to motor starter follow directions given on the starter wiring diagram for connecting two wire control devices 2 Field Replaceable and Convertible Contacts The Series 1500 Induction Relay provides circuit versatility by offering a contact kit that allows field conversions from N O to N C or N C to N O contact arrangements This option also allows you to add or replace contacts up to 3 per relay as required for expansion of your liquid level control needs Remove cover plate and armature For a N C contact install the moveable contact in the armature assembly facing toward the bottom of the relay toward the armature For a N O contact ETa install the moveable i contact in the armature assembly facing toward the top of the relay away me N O from the armature A Contact Kit Part No 15 000001 N C Contact N O Contact oe Bar D S For a N C contact
20. ves Normally closed Solenoid Valve Control for plating tank and boiler make up etc CAUTION Electrodes are terminals of live electrical circuits and must be installed to prevent accidental contact by personnel Control power must be disconnected before servicing A GOOD DEPENDABLE GROUND RETURN CONNECTION TO THE LIQUID IS REQUIRED INDUCTION RELAY WIRING DIAGRAM AND OPERATION ELECTRODE PILOT OPERATION aaa ee T0 ISOLATED LOAD CIRCUIT 5 eas TO ISOLATED ge LOAD CIRCUIT ELECTRODE ELECTRODE LOAD CIRCUIT A amp B CLOSED ABOVE THIS LEVEL EUEGTRODE LOAD CIRCUIT A amp B OPEN BELOW THIS LEVEL mmc ISOLATED LOAD CIRCUIT Tee 10 ISOLATED Swe LOAD CIRCUIT ELECTRODE ELECTRODE LOAD CIRCUIT A OPEN ABOVE THIS LEVEL B CLOSED ELECTRODE ELECTRODE LOAD CIRCUIT A CLOSED BELOW THIS LEVEL B OPEN ape 10 ISOLATED Ss ee at ee ge LOAD CIRCUIT LINE 4 VOLTAGE a 8 To ISOLATED SaaS eh ge LOAD CIRCUIT D SECONDARY 8 teil VOLTAGE q ELECTRODE LOAD CIRCUIT A amp B OPEN ABOVE THIS LEVEL ELECTRODE ELECTRODE LOAD CIRCUIT A amp B CLOSE BELOW THIS LEVEL TYPICAL APPLICATIONS Same as 1500 C Relay above except that additional Normally Open contact is provided to permit simultaneous operation of second pump Extra contact can also be used for signal purposes if desired Pump Up or Pump Down Control for same applications listed above for B W 1500 C and 1500
Download Pdf Manuals
Related Search