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Motor Drive Unit MA 9 Operating Instructions M = —_— GERMANY  M MASCHINENFABRIK...

Motor Drive Unit MA 9 Operating Instructions M = —_— GERMANY  M MASCHINENFABRIK REINHAUSEN BA 80/01 en — 0695/2000 Maschinenfabrik Reinhausen GmbH Printed in Germany Postfach 12 03 60 D-93025 Regensburg Phone: +49-941-4090-0 O Fax: +49-941-4090-111 Telex: 6 5 881 MOTOR DRIVE UNIT M A9 Operating Instructions No. 80/01 Contents Page 1. General... I esssroversessrsnsrressssanannnss rssrrsesessrans resssransans 2 2. Technical data.......cccvereiienmsmsimssmscnsssnssnnsnrsanesstssnmsssssesssssssss ssarssensis 3 B. DESIGN woeicreemrecrerrnnrrsanresnisessinsissasssessssessesssncressnnss amass ssnsas sensesarasaseses 4 4. Operational PriNCIPIE......ccrvevvscrieirerssirraresivsisssssressmessssserresssesssnsnssssasss 8 @, LST X 1 1Tg] oO OP 13 Please note: 6. Putting into operation... iwsmecisnssnimmsnisenmssscessasasiossnssssessannas 16 The pictures, drawings and circuit diagrams contained i n these 7. Maintenance.......cceeirrirerisissiscisnnsnnissesinnessniossssnsscsssssantrssssssssnsnsesnsn 16 Operating Instructions may differ ’ in detail from the motor drive unit. 16 delivered. They are for reference 8. Special designs.......ccsesrvesseermeesnrmsnsnrerererssssssssssssaissssssssnsssssnsassesssnss only and are subject to change : without notice. 9. APPENIX...cverrererrenserersensnseenaes rurraseesaesaetrsaetase er saerase senareas easserenearene 18 1. GENERAL The function of the motor drive unit MA 9 (fig. 1 , 2) is to drive a tap changer to the selected operating position. It can be used for some off- circuit tap changers also. The motor drive housing contains all mechanical and electrical parts ne- cessary for operating the tap changer. The control follows the step-by-step principle, i.e. for operating the tap changer from one service position to an adjacent one the motor drive action is initiated by a single control signal and accomplished without any possible interruption. Overrunning the end positions is pre- vented by electrical and mechanical limits. Further safety and monitoring equipment facilitates the service. For adapting the motor drive to any service requirements and to existing plants it can be provided with supple- mentary equipment. CAUTION: The motor drive unit is to be used only for operating the associated tap changer, bearing the same serial-no. Installation, electrical connection and putting i n service of the motor drive unit must b e carried out b y qualified, skilled personnel only, according t o these Operating Instructions. Do not alter o r modify the equipment without prior con- sulting MR. Improper work during installation, electrical connection and putting i n service of t h e motor drive m a y affect the trouble-free operation of motor drive unit, tap changer and transformer. a vains n u s [ B i d d d asa ddd adda ddd dd 431 Kh | Rca e r a a RAR E R A ()2. TECHNICAL DATA Motor ratings power 0.37 k W 0.55 kW Please note: The technical data con- voltage 220/380 V, 3-ph., 50 H z tained herein apply t o standard design current 1.911 A 291,7A only and may differ from the equipment synchronous speed 1500 1/min delivered. Alterations are reserved. Revolutions of the drive shaft per switching operation Rated torque on drive shatt 45 Nm 70 Nm Running time per switching operation 4.458 Revolutions of the hand crank per switching operation 30 Max. number of operating positions 35 Voltage for control and heater 220 VAC Input of the control heater 5 2 VA (when initiated) 16 VA (during the running time) Heater power permanent dissipation 30 W Insulation level 2.5KkV r.ms., 1 minute Weight approx. 60 kg Cabinet light-metal cast, two parts (tank and cover, vented b y labyrinth-breathers), outdoor design, protection IP 54, Gearing transmission gear, maintenance-free by grease lubrication, flanged motor. Electrical control step-by-step gear, running time controlled by cam performing one revolution per tap energization b y push-button, connection facility for remote control via push-button or voltage regulator. Safety devices electrical limit switch, mechanical position limitation b y stop for tap changer type A, motor protective switch with connection, for remote control (emergency-off-push- button), ) automatic restart after momentary control voltage break-down, safety connection for avoiding false phase sequence and running-through of service position, safety switch for switching off the motor circuit during manual operation. Monitoring equipment lamp signalling the energization of the motor protective switch, connection facility for “tap change in progress” indication, mechanical 6-figure counter. Position indicator mechanical position indicator, indication of a switching step by the tap change indication wheel with 30 sections, contact range with potentiometer for pointer instrument or contact range for lamp panel alternatively. ' Hand crank for emergency service and adjustment purposes.. 3. DESIGN 3.1 Mechanical equipment 3.1.1 Housing The housing consists of two parts, the tank and the cover, both made out of 120 \J %/ ;A 122 corrosion-proof light-metal casting. 116 vA 10 The housing gets a prime and a finish- F150 ing coat (colour RAL 7033). The cover "5 can be swung open easily. The swing- open direction is to the left side. The surfaces between cover and tank are protected by a ledge and sealed by sectional rubber. The apertures for drive shaft, inspec- tion glass, hand crank and push-but- tons are sealed in a way that the housing is well protected against jets of water. There are two labyrinth breathers in both sides of the tank for venting the housing. The bottom of the tank consists of three plates for the cable entries. 3.1.2 Gearing (see fig. 3) The gearing consists of the transmis- Number of cogs sion gear (fig. 4) and the control gear 3N Module wannn (fig. 5). The transmission gear is Rev. per min. = attached to the mounting panel. Rev. per switching operation Crank rotation sense: The control gear is fixed to one side of clockwise means »Raise« the transmission gear. It comprises a cam disc for operating the cam switches, the tap change indication wheel and the mechanical position indicator. The tap change indication wheel as well as the cam disc make 1 revolution per step. The green zone Fig. 3 Gearing layout indicates the rest position of the cam switches. The initial position for a tap change operation is indicated by the Transmission gear Control gear red center mark in the green field. 1 Driving motor 102 Shaft 116 Limit position stop 2 Driving worm 103 Idle coupling 117 Electrical limit switch 3 W o m wheel 104 Cam control 118 Leading switch for control 4 Thread wheel | 105 Step-by-step control switch circuit i n position 1/n 5 Thread wheel I l 106 Cogwheel 118 Limit switch for motor and 6 Hand crank shaft 107 Tap change indication disc control circuit in position 1/n 7 Safety switch for 108 Cogwheel 120 Position transmitter manual operation 109 Intermediate cogwheel 121 Contactam 8 Hand crank 110 Position indication wheel Coupling 9 Drive shaft 111 Shaft 123 Drag hands 10 Thread wheel Ill 112 Position dial 124 Cam control (group 1) 11 Thread wheel IV 113 Counter cam 125 Cam control (group 2) 12 Limit stop (fortap changer 114 Counter lever 126 Driving gear type A and MS only) 115 Operationcounter 127 Selsyn transmitter {opt.) 128 Transmitter coupling O 3.1.3 Hand crank The hand crank provided with a plas- tic handle i s attached to the outside of the housing by means of a clamp (wing nut). 3.1.4 Counter The mechanical counter records the switching operations performed. Its is not necessary to open the housing for reading the counter. As the reset wheel i s perforated, the counter may b e lead-sealed. 3.2 Electrical equipment (fig. 6), designation according to circuit Standard equipment S6/S7 limit switch for position n/position 1 , O H1 diagram 139 076 TS Marquart, no. 1330.0401, lamp signalling the motor protective three-pole design for 380 VAC, 25 A Please note: The equipment, desig- switch Q1 tripped, Rafi, leading limit switch contact: nation of components and circuit type LG 233 with socket BA 9 s Honeywell, type BZ-2 RW 822-A2 diagrams described herein apply to the standard design only and may S8 differ from the equipment delivered. K1/K2 safety switch for manual operation Alterations are reserved. motor contactor for control direction Marquart, no.1330.0401, three-pole »Lower« (towards position n), motor design for 380 VAC, 25 A tums clockwise/»Raise« (towards S12/514 position 1) motor turns counter- cam switches for control direction clockwise, ABB, type B9-40-22, four- »Raise« (towards position 1)/ pole design, auxiliary contacts: »Lower« (towards position n), 2NO +2NC Honeywell, type BZ-3YWT822, K20 two-pole change-over switch auxiliary contactor for (1 NO + 1 NC contact with a common step-by-step operation, switch-over contact) ABB, type K44E, contacts: 4 NO + 4 NC S13 O cam switch for step-by-step operation, M1 for details see S12 driving motor, S40 squirrel cage rotor, position transmitter for lamp panel rating see section 2 (see appendix, circuit diagram Qi 00 525 TM) motor protective switch, Siemens, optional: 3VU13, with thermic and magnetic tripping, three-pole design with 2 auxi- resistance position transmitter for liary contacts (1 NO + 1 NC), pointer instrument (see app., circuit open-circuit remote tripping diagram 00 885 TM), depending on number of operating positions: R1 5, 10 or 20 ohms per step, total heater, resistance up to 200 ohms, other Rosenthal, type ZWS100, resistances on request. resistance approx. 1600 ohms S§1/82 X20 push-button for control direction »Lower« (in direction of position n)/ multiple wire connector, Weidmiiller, type StV2/10 PA, O »Raise« (in direction of position 1), no. 3337.6 with cable clamp ZE2/10 Westinghouse, push-button type terminal ranges, Phonix, type K4/E T11AH50, switching element (control) or SLKG10 (position indica- 233E11, 1 NO + 1 NC contact tion) alternatively S5 push-button for tripping the motor protective switch Q1, Westinghouse, push-button type T11AH10, switching element 233EA11, 1 NO + 1 NC contact, with lamp socket (for lamp H1)  H1,S5 St S2 K20Q1 Ki K2 S$6,S7 - a _ i R E N E E EN ful rae judd dd ala dud a A v § : 3 ’ Ei X20 $12,513,514 Mm R1 S8 4. OPERATIONAL PRINCIPLE Circuit for tap-change-in-progress Prerequisite: indication Motor protective switch Q1, safety 41 Current circuits (see appendix, One phase of motor M1 is connected switch S8, limit switches 86, S7 circuit diagram 139076, to terminals 19, 20. closed (fig. 7a) standard design) Voltage at L1,L2, L3:380 V, Current circuit for remote position three-phase, 50 Hz Motor circuit indication (see appendix, circuit Voltage at L1, N: 220 VAC, 50 Hz The motor terminals U, V, W are diagrams 00 885 TM and 00 525 TM). connected to the power source via The position transmitter for the lamp motor contactor K1/K2, limit switch panel switches from one position S6/S7, safety switch S8 and motor contact to the next one in the break- protective switch Q1 are connected to before-make manner, The sliding L1, L2, L3 via the terminals 1, 2, 3. contact and the position contacts of Heater circuit the contact range are connected to The heater circuit is connected to L1, the terminals. N via the terminals 4 and 5. The The resistance position transmitter for heater resistor R1 is continuously on remote position via pointer instrument power source. operates make-break-before. For n Control circuit operating positions n-1 step resistors The control circuit is connect to L1, N are installed between the position via terminals 6 and 7, with the motor contacts. Beginning and end of the protective switch Q1 and the safety contact range as well as the sliding switch S8 interconnected so that the contact are connected to terminals. control voltage is interrupted when Q1 or S8 is energized. The tripping circuit of motor protective switch Q1 is 4.2 Operation (see appendix, interlinked with the control circuit. circuit diagram 139 076) The motor protective switch Q1 is 4.21 Control (see fig. 7 a... 71) provided with a tripping coil which can The motor drive control follows the be energized via push-button S5 (in step-by-step principle, i.e. after the Operation: the motor drive unit) and S9 (in the initiation the switching operation is (control towards position n) control room) and via the safety automatically and irrevocably accom- circuit. The safety circuit consists of Push-button S1 is operated, closes plished independent of whether push- 13-14 for energization of K1, opens switching elements of the cam buttons S1... S4 have been operated switches S12, S13, S14 and of 21-22 for blocking K2. during the running time of the motor K1 is energized, closes 1-2, 3-4, 5-6 auxiliary contacts of motor contactors drive. Another switching operation is K1 and K2. The tripping of the motor in the motor circuit, opens 21-22 for only possible when the control system blocking of K2 and seals in 13-14 and CO) protective switch Q1 is self-inter- is again in its rest position. The rest rupting. 43-44 to prepare sealing-in of K20 position of the cam switches control- (fig. 7b). Circuit for indication of t h e motor ling the running period is indicated by The motor M1 starts (clockwise protective switch tripping the red center mark of the tap change rotation). This circuit i s connected t o L1, N via indication wheel. the terminals 16, 17. The signalling lamp H1 is installed in the emergency- off-push-button S5 in the motor drive unit.  TS —— | ¥ — tt f= NTT ss A Xt |2 3 6 yD B SL 15 14 ¥ 9 11 | pil: Es 12 4 § x203 13s 13 X20 A a1 —{ G1 f 1 14 2 |4 [6 5 58 | v xege R T S8Ev—1+- u W X20 44 21 21 s2 81 22 | 22. 13 43 |43 13 5 81 K1 \K2 82 8 am 14 44 Jaa 14 X20 ¥y2 X20 ¥3 X20 ¥5 33 [23 c oe c S12|c 51404 4 Ni No2 NO2 31 31 513 0 K2 J We Jue fue xg = * ~~ J M1 M H3 NC1 _ N X1'20 K20 513 of vo 1 NC2 C1 E P a1 4 ca ] 13 7a a r—————r X202 %20 1 1 A X20 4 21 s1 22 13 43 [a3 13 SHEA K1 2) 44 44 s2 Fy 14 14 %20 ¥3. %20 ¥5 13 [33 [23 51 14 [34 [24 62 c t ] 13 ¢ Si4jc s12je 579 K 2 ) S12 ) o o) ve Ia NO1 NOR No2 NOA ls 31 31 S13 04 57 € - Ki Ke [ No2 v 22 32 43 24 NCH K20 K1 513 44 22 NC2 Step-by-step control: The direction-memory cam switch tL i — ___ r me T S14 is actuated and closes at con- sl p Ot tat——S TTT | 50 I tacts NO1-C (fg. 7c). x15 [. a Q 15 14 - :) 11 : 10 12 Q Xao3 13 X20 214 a1 [ 14 s8 s | ae X20 3 4 21 s1 22 13 43 43 13 S 5 EK K1 14 13 [33 14 134 j24 S130 K20 44 22 NC2 a1 at C1 K20 K2 Q1 Le A2 c2 a 7c Cam switch S13 closes at contacts NO1-NO2 and opens at NC1-NC2. Ly 1 F————————————— |S i n t : Het Auxiliary contactor K20 is energized, opens 51-52, 61-62, 7 1 - 7 2 a n d closes x1 IY mi a 15 umu 14 IT ( 10 J 12 13-14, 23-24, 33-34 (sealing-in), 43-44. reba 13 X 2 024 As K20 has opened at 71-72, K1 is [e}] kept in position only via cam switch 14 S14 (fig. 7d). 58 , rege X20 44 21 S1 a | 22 13 43 |43 13 s5 K1 [K2 S2 14 44 J 14 X20 ¥5 13 bo 23 SE pu— [RS 14 [3a loa ¢ s14fc s i 2 ) e S14 of ol NO1 No2 NO2 31 31 S13 0 K1 K2 [ 32 32 NC1 K20 S413 NC2 a1 c1 K20 Q1 a2 Le ca 13 7d 10 O Before the motor drive stops, the cam switch S13 opens at contacts NO1- rome mmm SAA St NO2 and closes at contacts NC1-NC2 (fig. 7e). of 3 TII-CITT14EH 15 :] 11 10 “ 12 " X20 ] 1 :13 14 :S v ef X20 1 21 S1 pt 5 le 52 : 14 14 0 S14 K20 7e Stop: Le The direction-memory cam switch Pomme SE Se S14, opens at contacts NO1-C to finish operation. I n-ne 8 15 14 ©, 11 I 10 H oP? Motor contactor K1 drops, opens 1-2, x2 3-4, 5-6 in the motor circuit, and 13 X20 31 13-14, 43-44 in the control circuit, a1 14 C closes 31-32, 21-22. S Motor contactor K1 opens 43-44 s8 v ep which results in auxiliary contact K20 being de-energized, opening 13-14, 23-24, 33-34, 43-44 and closing 51-52, 61-62, 71-72 (fig. 71). | [4 5 K20, however, only drops if push- HF button S1 (S2 resp.) is not pressed. x20 ¥5 If S1 (S2 resp.) is pressed, K20 i s 33 [23 sealed-in via its contact 13-14 (23-24 34 24 resp.) and prevents energization of K1 (K2 resp.) via N/C contact 51-52 (61- 62 resp.). S13 0 Control towards position 1 : Push-button S2 is operated. K20 Motor contactor K2 i s energized. Motor M1 rotates counterclockwise. _ Direction-memory cam switch S12 is 13 (_ operated. Further control is similar to control towards position n. / 11 4.2.2 Running through to an end position (position n or position 1) (contact 31-32) are closed and when at that moment the cam switch S13 O Shortly before the motor drive arrives (contact NC1-NC2) has not yet been operated. If the motor rotates in the in or surpasses the end position opposite direction, the same applies (fig. 8) the limit switch S6 (in position to cam switch S12 and motor contac- n), or S7 (in position 1) respectively, tor K2. opens contact NC-C so that the motor contactor K1 (or K2 resp.) can no Moreover, the motor protective switch longer be energized. is also tripped when, at the beginning of a switching operation, the motor When the end position has been drive is energized via the direction- reached or surpassed S6 (or S7 memory cam contact S12/S14 instead resp.) opens the contacts R-U, of push-button S2/S1 (unintentional T-W, thus breaking the motor circuit passage of positions). and, via contact S-V, the sealing-in circuit of motor contactor K1 (or K 2 resp.). 4.2.5 Control voltage break-down If after a voltage break-down during 4.2.3 Hand crank operation (fig. 9) the running time of the motor drive the QO The hand crank is fitted on the shaft. voltage is present again, the motor Before the crank engages the safety drive automatically restarts i n the switch S8 is operated. This switch direction in which it had previously interrupts the motor voltage and the been controlled. The switching opera- control voltage. After manual service tion once started is achieved by the hand crank is removed from the means of the direction-memory cam switch S12 (or S14 resp.) which is still shaft. The safety switch S8 closes again. actuated. In this case the safety cir- cuit is not energized, because cam While manually operating the drive switch S13 has already been oper- observe the tap change indication ated. wheel which indicates the mechanical sequence of the switching operation. 4.2.6 Voluntary tripping of the motor The wheel (see section 3.1.2) is protective switch Q1 divided into 30 sections 6 of which are marked green. The red center mark ‘ T h e motor protective switch Q1 may indicates the middle of the green zone be tripped by operating the emer- (see fig. 10). gency-off push-button S5 of the motor drive unit or by operating the emer- In order to prevent automatic motor gency-off push-button S9 in the O drive restart after hand crank opera- control room, which is connected in tion the motor drive has to be cranked parallel. to the red center mark of the tap change indication wheel, where The motor protective switch Q1 is mechanically operated cam switches reset by operating the black lever on are in rest position. the motor protective switch (fig. 11). 4.2.4 False phase sequence For this purpose the motor drive housing has to be opened. If the phase sequence at the termi- nals L1, L2, L3 is incorrect, the driving motor M1 rotates in the wrong direc- tion. If, in this case, the motor contac- tor K1/K2 is energized, the cam switch of the opposite direction S12/ S14 is operated. This possibility is taken into account in the safety circuit of the control circuit. Consequently, the motor protective switch Q1 i s tripped, when for example, the switch- ing elements of cam switch S14 (con- tact NO1-C) and of the motor contac- 12 O 5. ASSEMBLY - if there i s a different between the numbers of sections 5.1 Mounting the motor drive unit to counted i n both directions, the the transformer tank (see app., motor drive must be readjusted dimension drawing 893 381) in relation to the tap changer by The motor drive unit is mounted by half this difference of numbers. means of 4 studs fixed at the transfor- mer tank. The corresponding through holes are at the external side of the housing of the motor drive. The posi- tion of the bolts has t o be adjusted to the axis of the crank shaft so that the correct dimension V1 is obtained (fig. 12). Take care that the motor drive unit is mounted vertically and that its drive shaft is in correct alignment with One tap change operation corres- the shaft of the bevel gear. ponds to one rotation of the tap change indication wheel. The tap If the transformer causes extremely change indication wheel is divided into heavy mechanical vibrations the use 30 sections with one section corre- of vibration dampening connectors is sponding to one rotation of the crank. recommended. The number of sections, counted from the beginning of the tap change oper- 5.2 Mounting the drive shaft and ation until the red center mark of the the bevel gear (see Operating indication wheel faces the mark on Instructions No. 42) the inspection window, should be equal i n both rotation senses. Minor asymmetry is admissible. 5.3 Coupling of tap changer and motor drive Symmetrical coupling i s achieved as follows: Note: It is absolutely necessary that the tap change operation is accomplished —- Adjustment only by manual Tap changer type V, H before the motor drive stops. operation The square shaft tube of the vertical This ensured by setting the time of - At every adjustment take care drive shaft can only be coupled to the the selector or diverter switch action that the position indication coupling brackets after a rotation (= on-load tap changing) at a distinct reading of both motor drive angle of 90° or multiples (standard interval before the end of the motor and tap changer are identical. coupling brackets see fig. 13). drive action (1.5... 2 sections before —- Tap changer and motor drive This angle corresponds to 3.75 the red center mark on the tap have to be in the adjustment sections. change indication wheel). This red position. Readjusting, therefore, becomes ne- center mark is used as a reference cessary only if the difference between when adjusting. - Couple tap changer and motor clockwise and anti-clockwise cranking drive. is in excess of 3.75 sections. -~ T u m crank i n o n e direction until selector or diverter switch action occurs. Count the remaining sections until the red center mark of the tap changer indi- cation wheel is visible in the middle of the inspection window. —- Repeat this procedure in the opposite direction. 13 Tap changers types A, MS, M and R The square tube of the vertical drive ® shaft can be coupled to the coupling 0 5 10 15 20 25 30 brackets after a rotation angle of 30° or multiples (coupling brackets in (TTT ’ | 1 [1 2 Lt | a special design see fig. 14). This angle corresponds to 1.25 sections. Operation of diverter switch Readjusting becomes necessary 30 25 20 ) 15 10 5 0 when the difference between clock- wise and anti-clockwise cranking is in excess of 1.25 sections. | | | b Operation of diverter switch 1. Example: } 0 5 10 15 2 25 30. Tap changer type V, H (see fig. 15) TIT T T I T7110 a) Tap changer is in operating posi- i. mmamrans [ I } Operation of tion 10. Turn crank towards 11 until diverter switch selector switch action occurs. Count the number of sections until red center mark appears. Result: 12 sections b) Tap changer is in operating posi- Uncouple I d tion 11. Turn crank towards 1 0 un- til selector switch action occurs. Count the number of sections until red center mark appears. 0 375 Result: 4 sections | e Correction value: 1/2 (12 sections — 4 sections) = 4 sections, chosen 3.75 sections. Readjusting is necessary because 1 2 sections — 4 sections = 8 sec- tions more than 3.75 sections. Couple f ¢) Turn crank towards position 11 until red center mark appears. 5 10 15 30 d) Uncouple vertical drive shaft. — |9 TT e) Turn on in the same direction (towards position 12) by 3.75 Operation of sections. diverter switch 30 25 20 15 10 5 f) Couple again. g) Turn on in the same direction (as with e) until selector switch action |» occurs. Count number of sections { Operation of diverter switch until red center mark appears. Result: 8.25 sections. h) Check in the opposite direction. Result: 7.75 sections. Fig-15 Coupling t o tap changer types V a n d H Q A O Mm ,b Counting the sections after selector switch action in both directions IR A | Coupling tap changer — motor drive is Cranking i n the direction of the bigger number of sections sufficiently symmetrical.. Uncoupling Cranking on b y correction value I NO Coupling I Completing operation, checking number of sections I TO Checking in the opposite direction |I 14 () 2. Example: Tap changer types A , MS, M and R (see fig. 16) ® a) Tap changer is in operating posi- 0 5 10 15 20 25 tion 10. Turn crank towards 1 1 until I T diverter switch action occurs. Count the number of sections until | 1 a | a red center mark appears. L _ _ operation f Result: 7 sections ’ diverter switch 30 25 20 15 10 5 0 b) Tap changer is in operating posi- tion 11. Turn crank towards 1 0 un-. til diverter switch action occurs. 1 Count the number of sections until » ' Operation of diverter switch red center mark appears. 0 S 10 15 20 25 Result: 1.5 sections Correction value: 1/2 (7 sections — 1.5 sections) = |. | || EEE Operation of 2.75 sections, chosen 2.75 sec- diverter switch tions. Readjusting is necessary be- cause 7 sections — 1.5 sections = QD, ®@ 5.5 sections more than 1.25 sec- tions. ¢) Turn crank towards position 11 until red center mark appears. Uncouple — d d) Uncouple vertical drive shaft. GB - e) Turn on in the same direction 0 25 (towards position 12) by 2.5 sections. f) Couple again. i e g) Turn on in the same direction (as with e) until selector switch action occurs. Count number of sections Couple f until red center mark appears. Result: 4.5 sections. h) Check in the opposite direction. 3 10 15 20 25 30 Result: 4 sections. ULAR Coupling tap changer — motor drive is sufficiently symmetrical. i | | 9 Operation of diverter switch 30 25 20 15 10 5 0 5.4 Preparing the electrical service The electrical leads to the motor drive unit are connected according to the a wiring diagram. { Operation of diverter switch For changing from manual service to motor service the hand crank is re- moved which results i n the electrical Fig. 1 6 Coupling t o tap changer types A, MS, M a n d R motor blocking (safety switch) being b Counting the sections after selector switch action in both directions cancelled. Cranking i n the direction of the bigger number of sections Sa~oaom Uncoupling Cranking on b y correction value Coupling Completing operation, checking number of sections Checking i n the opposite direction 15 6. PUTTING INTO OPERATION 6.1.3 Operational test of the limit 8. SPECIAL DESIGNS switch (electrical limitation of (To 8.4 and 8.5 alternative only) the end position) In order to meet certain service re- 6.1 Operational tests The tap change range is run through quirements the standard design of the WARNING: Rt may be more con- up to one end position. Further control motor drive unit may be altered as fol- venient t o perform the operational in the same direction must not result lows: test, as described below, with the in any motor drive operation. Motor protective housing open and the drive action is, however, possible in 8.1 Other rated voltage for motor, supply voltage connected. I n this the opposite direction. For testing the control and auxiliary circuits case, please strictly observe the other limit switch the corresponding respective safety regulations. procedure is applied. 8.2 DC control circuit Before applying the supply voltage for 6.2 Transporting the transformer 8.3 Lightning controlled by door motor circuit, control and auxiliary switch circuits check whether voltage, cur- Should it become necessary to dis- rent and output of the supply coincide mount the motor drive during trans- 8.4 Plug socket, mounted on the with the required values. When check- portation of the transformer from the instrument panel ing the voltage of the motor circuit manufacturer to the operating site take care that the L1, L.2, L 3 phase because it exceeds the permissible 8.5 Built-in automatic fuses for O sequence is clockwise (rotary field dimension, tap changer and motor test). control and auxiliary circuits drive have to be set to the adjustment position. 8.6 Increased heater dissipation for The motor drive unit is remounted operation i n arctic areas. 6.1.1 Checking the step-by-step according to section 5. The permanent heating (30 W) operation In case of longer stand-by period the remains, whereas the heater For this purpose operate push-button power controlled by thermostat space heater of the motor drive unit S1 (or S2 resp.). Keep the push- is 100 W. should be connected to power. button in the operating position until the motor stops. Make sure that the 8.7 By hygrostat controlled 6.3 Putting into operation at the additional heater power 50 W. driving motor is automatically operating site switched off when the tap changer has performed one switching opera- Before commissioning the transformer.8.8 Drag hands tion and the green zone of the tap operational tests according to section changer indication wheel has been 6.1 have to be performed. 8.9 Device for automatically run- reached. ning through one or several positions (automatic passage of "6.1.2 Operational test of the me- 7. ~ MAINTENANCE positions). In the automatic chanical limit stop (for tap passage of position the step- changer type A only) As the transmission gear and the ball by-step operation (see section CO bearings of the driving motor are sup- 4.2.1) is cancelled by the me- The tap change range is run through plied sufficiently with grease, regular chanically operated NO contact up to the last but one position. Then maintenance is not necessary. $37 which is mounted on the the motor drive is manually operated We recommend, however, occasional transmitter plate (see appendix, up to the end position (red center inspections which should focus on: circuit diagram 21 025 TS). mark). Further manual operation re- — the housing being water- sults in blocking the motor drive unit proof after about 2.5 revolutions of the hand crank. Then the hand crank is opera- - function of electrical heater ted in the opposite sense to the end - the appearance of the position (red center mark) previously equipment in the motor drive reached. unit The same procedure is applied when We recommend to perform some test the other end position is tested. operations during these inspections. Changing from manual to motor ope- Furthermore the function of the limit ration is performed as indicated in switch should be checked. section 4.2.3. 16 O 8.10 Special designs of the position transmitter X51 a) Contact range for decadic lamp panel (decadic trans- mitter), fig. 17 $38 b) NC contact range (contact opens in the operating position), fig. 1 8 ¢) Additional contact range for remote position indication The standard design of the motor drive unit is provided with a potentiometer contact range for remote position in- X5.2.3 4L 5 6 15 dication by pointer instru- ment or with a contact range for lamp panel (see appen- dix, circuit diagrams 00 885 TM and 00 525 TM). Moreover, up to 27 operat- HHERE 2|® ing positions an additional njn|unjniniN ne.—_n|v contact range (closing in the X56 |1]|2|3|4]5]6.——_14|15 operating position) may be installed. u [00}10}20}30} 1 — — — __g l o d) Intermediate gear with mounting facility for a selsyn transmitter (type and angle Fig. 17 Contact range for decadic lamp panel per step should be indica- ted in the order sheet) 8.11 Additional end position X5.1 2 signalling contacts (1 NC and 1 NO contact for each end position) 8.12 Additional cam switches The motor drive unit may be L ~ _] / Ed supplied with a maximum of 12 additional cam switches, Honeywell, type BZ-2 RW S38 822—-A2 (NO or NC contacts). The operation angle of cam is adjustable. YR X5.3 S.n 8.13 Housing to be locked by a padlock 8.14 Hinged cover for swing open direction to the right side. 8.15 Driving motor for DC, rated power 0.25 kW, necessitates 1 be 2 protective housing in special X8 {112 3 c n design. 8.16 Driving motor for single-phase alternating current, rated power 0.37 kW, necessitates protec- tive housing, in special design. Fig. 18 NC contact range 17 9. APPENDIX reeset saree ssn eterna ness sne sean Circuit diagram..........cccoeiricreereereeecccrre Position transmitter for lamp panel, circuit diagram essesssascosnvunsnusuancns Position resistor transmitter, circuit diagram essasssverecasacte sms anys RAE RRORUAS Protective housing, dimension drawing aesseteesruurransae seis essa eeNERTIR ERR SEROIOS Drive shaft assembly DT EE TE TT PP TY PY PTT TPP Transmission gear, parts designation EE Ey POTTY PP rT TY PY PTT Control gear, parts designation DE yy PEPPY PY ET PT TTT PET RY 18  19 3 3 O TLJ e w 0's 2° C TFx E Wy. 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