identifying unmarked 9 lead motor pdf

File sharing on the ENG-TIPS Forums is outsourced to ENGINEERING.com. The positive voltmeter lead should be on this lead, and the negative lead should be on the #6 motor lead. One of the tips should touch the motor's case while the other touches one of the exposed wire leads. I still have no luck. Each component ought to be placed and linked to different parts in particular manner. Special Note: Motors often come from rewind shops with only three leads exposed ("A-phase", "B-phase", and "C-phase" or 1, 2, & 3). What are the Procedures (step by step) please, for identifying unmarked Leads on a three phase electric motor, and what - Answered by a verified Electrician We use cookies to give you the best possible experience on our website. Suppose we have a new Induction motor without any marking of the leads, then we need to identify its polarity before using it. In a NEMA motor there are 12 leads or coil ends internally but only nine are brought out. MaxHeadRoom. the thick wire gauge winding is the main winding and the thin wire gauge winding is the starting winding. ... Once you’ve identified all 9 leads the motor can be safely energized, and you know the connections are correct. * Identifying unmarked 12 lead wire motor Home. Your tester will have two wires with lead tips. In such case, each cable will be marked with the appropriate lead number. leads coming out of motor without any identification. MOTORS . Twelve-lead induction motors will almost always run connected delta. This article will address lead identification of three-phase motors with 9 leads, based on the premise that none of the leads are marked. 8. DELTA CONNECTION We will need: 1- Ohm Meter 2- 6 or 12 volt battery 3- Tape to label leads 4- Copy of Augie Hand's "Identifying Unmarked Leads" First thing is to use Ohm meter, there are 3 separate pairs, to find the 3 different groups. In order to identify the positive and negative leads of an unknown volt meter a simple test must be performed. Usually six terminals from the three phases of an induction motor are available. Each lead may have one or more cables comprising that lead. wdg. I'll tell you how to identify it if you tell me what type of motor it is. For the Delta connected 9-lead motor the following insulation tests can be done and are listed in Table 2. The 3 wires that are connected together inside of a 9 lead motor are brought out to the motor terminal box in a 12 lead motor. When half the poles are energized with intermittent DC, two more poles are created in the motor's iron core. Now you have got coil for a phase with lead 1 as starting and 3 as ending. The rotor is needed to complete the magnetic path. The magnetic lines of force of these poles will cut the conductors of… waross (Electrical) 18 Jan 12 18:26 If it is possible to energize the field with AC, the voltage induced in the windings will be mostly independent of the speed of rotation. The NEMA 9 lead configuration can be either Star Or Delta, but cannot be changed with the external leads. Tom Bishop, P.E. Motor Wiring Diagram 9 Lead, Dual Voltage, WYE Connection Part Winding Start (PWS) on Low Voltage To reverse direction of rotation, interchange leads L1 & L2. Equipment: Test Light or ohmmeter, 6 or 12 volt battery, low scale voltmeter and numbered lead labels. Yorkrepair.com Prof. Steve discusses how to identify unmarked 9 lead (Delta connection) on a motor. Identifying Unmarked Leads of a Y Connected Motor By: Augie Hand. A lead Wye Start/Delta Run Motor has the ability to meet several starting Wye Delta Starter or by a series of contactors in a control circuit. This step will require a volt-ohm tester. Save money and time by calling us, today! Identifying Unmarked 9 Lead Motors: WYE Connection Posted 18 December 2014 by Cammy Sanchez in category Uncategorized with 0 comments. Two separate winding motor has many desired different polarities which offers the possibility of different speed ratios. Oct 29, 2015 #4 The 3 phase AC source line voltage L1 is connected to the motor terminals 1-12, line voltage L2 is connected to the motor terminals 2-10 and finally line voltage L3 is connected to the motor terminals 3-11, while also individually joining together motor terminals 4-7 then 5-8 and finally 6-9 respectively (refer to above drawing). Wye Start Delta Run or PWS Connection, 12 Lead Single Voltage: 965105 : Delta Connection, 9 Lead, VT, 2 Speed, 1 Winding, Single Voltage: 987241 : Delta Connection, Single Voltage, with Current Transformers, LA & SC: 991905 : Triple Rate Motor Connection: 2010950 : Single Voltage, WYE Connected, with Partial Current Transformer Protection: 2010964 Volt meter polarity identification Step 1 Set the volt meter on the 15 volt range as shown in the pictorial. Figure 6.28 shows a single-phase magnetic circuit containing four poles. the rotor may be positioned so that one winding is at the maximum voltage and the rotor left in that position until the companion winding is located and connected. Datasheets, Manuals & Parts Identification ... Identifying unmarked wires for 12 lead dual voltage motor to Delta.pdf. is there any test to identify start and end ... 9. ... from the motor, the terminal markings shall be those established for the device. With the dahlander winding, it is only possible to reach a pole number ratio of for example 2:4, 4:8 or 6:12. 9 3 7 11 Low Speed High Speed U1 V1 W1 W2 U2 V2 TK TK Thermal Overloads TWO SPEED STAR/DELTA MOTOR Switch M 3~ 0-10V 20V 415V AC 4-20mA Outp uts Diagram IC2 M 1~ 240V AC 0-10V Outp ut Diagram IC3 M 1~ 0-10V 4-20mA 240V AC Outp uts These diagrams are current at the time of publication, check the wiring diagram supplied with the motor. Identifying unmarked wires 12 lead dual voltage motor Delta High Voltage LIVE PLC Questions And Answers i want to identify start and end lead of each wdg. For a factory pre-configured star (wye) 9 leads motor, there is a continuity reading through terminals 7-8-9 and also through terminals 1-4, 2-5 and 3-6 (see drawing provided below for details). Single Phase Motor Wiring Diagram With Capacitor – baldor single phase motor wiring diagram with capacitor, single phase fan motor wiring diagram with capacitor, single phase motor connection diagram with capacitor, Every electrical arrangement is made up of various unique pieces. It makes a difference what type of six lead motor it is as the way of identifying them are different. When single-phase motors use lead colors instead of letter and number markings to identify the leads, the color assignment shall be determined from the following:* T1–Blue . Forums. for connection. If only a couple of leads are unmarked, you may be able to restore numbering by process of elimination. (989)922-0043 . there r 6 nos. Joined Jul 18, 2013 21,630. Unmarked Leads. They have two windings for Starting and Running purposes. Consequent pole, part winding, dual wound, wye-delta, etc. 1. You will have to identify the 8 and 11 leads as the motor will not work correctly if they are reversed. The advantage of the IEC twelve lead motor is that you can change connections from parallel to series and from star to delta. Identifying The Windings Single phase motor. I was previledged to know an old Motor Rewind Man. Link to Augie Hand’s “Identifying Unmarked Leads” Contact RepairZone.com for further information – Buy, Exchange, Repair your Automation equipment, such as servo motors and electronics. Obtaining these continuity readings confirms that the motor is … Shift the battery to the #8 & #9 pair, with the positive battery lead on the #8 lead and the negative used for the flashing. Like Reply. If their polarity markings (A1, A2; B1, B2; C1, C2) are not known, then these can be found out by a polarity test on the induction motor. Test the lead. Otherwise, it’s best to ask a service center for assistance, because they have reliable procedures for identifying … When a downscale deflection of the voltmeter needle. Prof. Steve shows how to identify unmarked 9 lead (WYE connection) on a motor. Sometimes you can find yourself in a difficult situation whereby the nameplate of the motor or wiring diagram is missing! The Delta connected motor has a … RE: Identifying Winding (leads) on 12 lead Generator. Twelve lead motors are not that uncommon. Read the results on the tester, then repeat the same procedure with the other exposed wire lead. Datasheets & Parts. Single Phase Motors have a wide range of applications both domestic and industrial. MOTOR WIRING DIAGRAM 466703 12 Lead, Single Voltage, Wye Start – Delta Run or Part Winding Start Revised: 1/8/2014 NIDEC MOTOR CORPORATION ST. LOUIS, MISSOURI. Identify the nine motor leads as follows: T1 = i T2 = h T3 = f T4 = c T5 = b T6 = g T7 = a T8 = e T9 = d For low voltage (240 volt) operation, connect leads T4-T5-T6 together with a wire nut. --WYE CONNECTION— A wiring diagram is a form of schematic which uses abstract pictorial symbols to exhibit … The lead on the positive (+) side of the battery is painted or taped in red. One of the most common uses of a 12 lead motor is for wye delta starting. Now you have got 3 sets of coils with six wires. 69.1 KB Views: 47. :thumbsup: I had a 3 phase ac motor i want to to connect to power supply and the control was starting by star then delta (6 leads) my problem is the si lead came from motor has no marking for the 1,2,3,4,5,6 i cant determine the 1,2,3 and the 4,5,6.please help me Identification of the #3 motor lead is then determined by an upscale kick. Table 2.Testing guide for a Delta connected 9-lead motor. 12 leads 3 phase high volts delta connected wiring configuration diagram electrical schematic diagram of a delta configured 12 leads motor so connected A lternatively, discover how to power your home with Solar and Wind Energy! 9. An explanation of the unmarked lead test involves magnetic circuits and transformer theory. 3 phase motor wiring diagram 12 leads – What’s Wiring Diagram? EASA Senior Technical Support Specialist The markings on the external leads of a motor sometimes become defaced or are removed, which makes it neces­sary to identify and mark them before the motor can be properly connected to the line. ! He'd often start his schematic explainations with: "this line I have here in my hand comes from Boulder Damn". How to Identify starting and running winding in a single-phase motor If you open the single-phase motor, you will find out that your motor has two types of winding of which one is made from thick wire gauge and one thin. Do the same exercise as mentioned in step 7 to identify starting and ending of coils and connect in delta as usual. SINGLE PHASE MOTOR WIRING DIAGRAMS Single Voltage Motor 208-230V CCW CW L2 L1 T1 T8 T4 T5 T1 T5 T4 T8 Dual Voltage Motor 115V or 208-230V 208-230V or 460V Low Voltage High Voltage CCW CW CCW CW L2 T1 T3 T8 T2 T4 T5 T1 T3 T5 T2 T4 T8 L1 T1 T3 T8 T2 T4 T5 T1 T3 T5 T2 T4 T8 L1 L2 Dual Voltage Motor with Manual Overload (-MO) The motor should be assembled. I agree that no help was found here, but to ID unmarked leads on a three phase 12 lead motor is tough, its not in the electrical handbook. T2–White . The power ratings of two speed winding can be Proceed with the step 7 for rest of the coils and identify 3 groups of coils. 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To be placed and linked to different Parts in particular manner IEC Twelve lead motor is that you find! Lead motors are not that uncommon end lead of each wdg my Hand comes from Boulder ''... Is a form of schematic which uses abstract pictorial symbols to exhibit … Twelve motors... Lead labels test Light or ohmmeter, 6 or 12 volt battery low... Ought to be placed and linked to different Parts in particular manner but can not changed! Your tester will have two wires with lead tips the connections are correct ends but! Are available may have one or more cables comprising that lead have a new induction are... For 12 lead motor is that you can change connections from parallel to series from... External leads only a couple of leads are marked 9 lead ( Delta connection ) a. Reach a pole number ratio of for example 2:4, 4:8 or 6:12 are energized with intermittent DC two! 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Are available or 12 volt battery, low scale voltmeter and numbered lead labels ends internally only! Pole number ratio of for example 2:4, 4:8 or 6:12 domestic and industrial motor without any marking the... To be placed and linked to different Parts in particular manner the NEMA 9 lead motors are not uncommon... Can find yourself in a difficult situation whereby the nameplate of the most uses! Lead, and the negative lead should be on this lead, the... Twelve-Lead induction motors will almost always run connected Delta will almost always run connected Delta lead... Not that uncommon or 6:12 tell you how to identify unmarked 9 lead ( Delta )! On 12 lead Generator that lead: an explanation of the unmarked lead test magnetic!

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