IA 75/80 (Partial Issue) Inspection Instructions - PDF

MASCHINENFABRIK REINHAUSEN...

MASCHINENFABRIK REINHAUSEN J] IA 75/80 (partial issue) Maschinenfabrik Reinhausen P r i n t e d i n Germany Gebriider Scheubeck G m b H & CoKG Postfach 1 2 0 360 8400 Regensburg Telefon (0941) 440-1 Telex 65881 ON-LOAD TAP-CHANGER T Y P E DA Inspection I n s t r u c t i o n s N o. 75/80 Contents Page 1. General Preliminaries 2.1 Tools 2.2 Spare parts 2.3 Oil filling quantities 2.4 Lifting device and withdrawing height 2.5 Graunding 2.6 O p e r a t i n g position Removal of the diverter switch insert C l e a n i n g a n d c h e c k i n g t h e d i v e r t e r o i l com- p a r t m e n t a n d t a p - c h a n g e r head 4.1 Cleaning t h e d i v e r t e r switch o i l compartment and the tap-changer head 4.2 I n s p e c t i o n o f t h e d i v e r t e r s w i t c h o i l compart- ment 4.3 I n s p e c t i o n o f Geneva g e a r 4.4 Control work 4.5 M o u n t i n g o f t h e gear p l a t e 4.6 I n s p e c t i o n o f t a p - c h a n g e r h e a d cover  sig aa cpa g h e iT S Lat ;a te HE tl L S Sa p r a. ross * t A R M R NrmetiBT — NTP SERE on ; Sgn Rh e SC i pe. PE I ri On-Load Tap-Changer Type D a |-208 083 MERE" 09.12.80/page 1 Inspection Instructions Fir diese technische Unterlage behalten wir uns gemaf 1. GENERAL D I N 34, Abschnitt 2.1, alle Rechte vor. We recommend a p e r i o d i c inspection o f t h e t a p - c h a n g e r equipment to maintain a h i g h r e l i a b i l i t y i n s e r v i c e. T h e below t a b l e indicates t h e n u m b e r o f t a p - c h a n g e r operations a f t e r which an inspection s h o u l d b e c a r r i e d o u t. T h i s f i g u r e has been experienced from t h e o i l qualities n o r m a l l y u s e d. Inspection i n t e r v a l s v a r y according t o t h e t h e t a p - c h a n g e r model a n d t h e o p e r a t i n g through-current. ‘If t h e number o f s w i t c h i n g operations indicated i n t h e t a b l e s h o u l d n o t h a v e been reached inspection w i l l become necessary a t t h e latest after a p e r i o d o f two t o t h r e e y e a r s. We recommend t h a t t h e inspection should o n l y b e c a r r i e d o u t b y a well t r a i n e d personnei. D u r i n g such a n inspection t h e d i v e r t e r s w i t c h i n s e r t h a s to b e w i t h d r a w n , disassembled, cleaned a n d checked. T h e diverter -- ~~ switch i n s e r t should n o t b e exposed t o atmospheric h u m i d i t y m o r e t h a n n e c e s s a r y ( m a x. for ten h o u r s ). O n t h i s occasion the o i l i n the d i v e r t e r s w i t c h o i l compartment should b e changed. F u r t h e r m o r e t h e d r i v e s h a f t w i t h bevel g e a r , motor d r i v e , p r o t e c t i v e r e l a y a n d , i f e x i s t i n g t h e oil f i l t e r u n i t , h a v e to b e checked f o r p r o p e r operation. I f t h e inspection w i l l not b e performed b y MR personnel please g i v e u s y o u r r e p o r t for data collecting purposes so t h a t we can p r o v i d e f u r t h e r recommendations, i f a n y , for y o u r n e x t i n s p e c t i o n. tap-changer number o f s w i t c h i n g through-current operations D il 400A < 400 A 20.000 Table I : Inspection i n t e r v a l s 2. PRELIMINARIES D u r i n g inspection w o r k w h i c h has t o b e done s w i f t l y cleanliness a n d care should b e followed. T h e d i v e r t e r s w i t c h i n s e r t should n o t b e exposed t o a i r more than necessary (max. f o r ten hours). 2.1 Tools 1 socket w r e n c h size 19 1 socket w r e n c h size 17 1 socket wrench size 13 1 socket w r e n c h size 10 1 socket w r e n c h size 8 1 open-jaw w r e n c h size 19 1 open-jaw w r e n c h size 17 1 open-jaw wrench size 13 1 open-jaw w r e n c h size 10 1 open-jaw w r e n c h size 9 1 open-~-jaw w r e n c h size 8 1 Allan k e y size 5 ( a l t e r n a t i v e l y ) 1 Allan k e y size 4 1 screw d r i v e r 1 circlip pincers A l 1 locking pincers 1 operating key (switch spindle) 2 cocking hooks ( D 0444) 040 9 9 4 : 0 1 1 029 4 6 2 : 9 8 operating key (energy accumulator) M A D 135  IE h e TO or ME NR" =: 22 DN Fl Wr m$ie t MRE On-Load Tap-Changer Type D A 208 083 Inspection Instructions 09.12.80/page 2 Fiir diese technische Unterlage behalten wir uns gemag 2.2 S p a r e parts D I N 34, Abschnitt 2.1, alle Rechte vor. When o r d e r i n g spares please g i v e always t a p - c h a n g e r serial n u m b e r a n d n u m b e r o f s w i t c h i n g operations c a r r i e d o u t. 2.3 Oil filling quantities T h e o i l q u a n t i t y necessary for t h e t a p - c h a n g e r i s a b o u t 200 l i t r e s. Pro- c u r e t h e necessary q u a n t i t y o f n e w o i l w i t h s u r p l u s for c l e a n i n g , as well a s s u i t a b l e v e s s e l for t h e f o u l e d o i l a n d a s u i t a b l e o i l p u m p for oil replacement. 2.4 Lifting device a n d w i t h d r a w i n g height P r o c u r e a suitable l i f t i n g device for w i t h d r a w i n g the d i v e r t e r switch i n s e r t. Withdrawing h e i g h t i s a b o u t 2.100 mm a n d the w e i g h t o f t h e i n s e r t i s as a maximum 150 k g. 2.5 Grounding. Disconnect t h e transformer from the l i n e. S h o r t a n d g r o u n d a l l terminals. 2.6 Operating position I t i s p o s s i b l e t o remove t h e d i v e r t e r s w i t c h i n s e r t i n a n y s e r v i c e p o s i - tion. But it is recommendable because of the checking work to be per- formed w i t h i n t h e t a p - c h a n g e r head t o w i t h d r a w t h e d i v e r t e r s w i t c h i n - sert i n the adjustment position (see adjustment p l a n ). B y operating clockwise t h e motor d r i v e w i t h t h e h a n d c r a n k t h e t a p - c h a n g e r can b e brought into the adjustment position. Attention: Do n o t operate t h e motor d r i v e before re-installing the d i v e r t e r switch unit. REMOVAL OF THE DIVERTER SWITCH INSERT S h u t all valves between oil conservator, t r a n s f o r m e r t a n k a n d t a p - c h a n g e r head. Lower the oil level in the tap-changer head. For this purpose open the vent screw of the t a p - c h a n g e r h e a d cover ( c a p M16 s i z e 2 2 , socket head cap screw M6) and open t h e d r a i n valve of the tap-changer head. I n case of s t a t i o n a r y o i l f i l t e r operate t h e sample v a l v e of t h e return " p i p e a n d o p e r a t e t h e o i l f i l t e r unit. D r a i n o i l from t h e t a p - c h a n g e r head t i l l t h e e n e r g y accumulator i s free from o i l ( l o o k t h r o u g h t h e inspection window o f t h e t a p - c h a n g e r head cover). M R D 135  Replacement w o r k o n tap-changer head 5.1 R o l l e r b o l t o f g e n e v a cam wheel 5. 2 Safety d i a p h r a g m Separate flanges o f s u p p o r t i n g c y l i n d e r w i t h insert head as well as disassemble and reassemble insert head 6. 1 Separate flanges o f s u p p o r t i n g c y l i n d e r 6. 2 Disassemble o f i n s e r t head 9-10 6. 3 Cleaning t h e s u p p o r t c y l i n d e r w i t h i n s e r t head 6. 4 Control work 10-11 6. 5 R e a s s e m b l y o f i n s e r t head 11 Replacement work 1 7.1 Roller and slide square bolts 11 7.2 Shock a b s o r b i n g s p r i n g s 11 7.3 E n e r g y accumulator s p r i n g 12 Disassembly o f d i v e r t e r switch u n i t type D 0444 8. 1 Removal of t h e m o v i n g contact system 13-15 8. 2 Cleaning t h e d i v e r t e r s w i t c h u n i t 16 8.3 Control work 16-17 Reassembly o f d i v e r t e r s w i t c h i n s e r t 17 9.1 Mounting moving contact systems 17-19 8.2 C o u p l i n g t h e t h r e e d i v e r t e r switches 18 9.3 Mounting of supporting cylinder with insert head 19 9.4 Mechanical f u n c t i o n control of diverter switch insert and check of the resistance value 19-20 10. Installation of diverter switch insert 20-21 11. Oil f i l l i n g 21 12. F u r t h e r t r i a l operations a n d p u t t i n g i n t o service 21 12.1 Drive shafts 21 12.2 Equalizing t h e rotation l a g 21 12.3 T r i a l operations 22 12.4 Protective relay 22 13. Appendix 22 13.1 Adjustment p l a n for t a p - c h a n g e r t y p e D A 22 13.2 Tools 22 13.3 P a r t s o f d i v e r t e r s w i t c h unit 22 Fiir diese technische Unterlage behalten wir uns gemat = On-Load Tap-Changer Type D A 208 083 Inspect ion I n s t r u c t i o n s 09.12.8 0/page 3 U n b o i t t h e g r o u n d c o n n e c t i o n o f the tap-cha nger head cover [ s c r e w M 1 2 DIN 34, Abschnitt 2.1, alle Rechte vor. ( s i z e 1 9 ) a n d remove c o v e r screws M10 ( s i z e 1 7 ) ] w i t h washer s ( f i g. 1). fig. 1 Remove t a p - c h a n g e r head cover a n d g a s k e t. When deposin g t h e t a p - c h a n g e r h e a d c o v e r t a k e c a r e o f t h e i n s p e c t i o n w i n d o w a n d t h e safety d i a p h r a g m. Remove the four nuts M12 ( s i z e 1 9 ) with p r e s s u r e s p r i n g s (fig. 2). M A D 135  FABRIK IMRRasii=e™ On-Load Tap-Changer Type D A 2 0 8 083 Inspection I n s t r u c t i o n s 09.12.80/page 4 Fiir diese technische Unterlage behalten wir uns gemaf Withdraw d i v e r t e r s w i t c h i n s e r t from t h e o i l compartment i n vertical d i r e c t i o n ( f i g. 3 ) a n d depose i t o n a clean s u r f a c e. D I N 34, Abschnitt 2.1, alle Rechte vor. fig. 3 Pump off the remaining o i l from t h e d i v e r t e r s w i t c h o i l compartment.. CLEANING AND CHECKING t h e d i v e r t e r s w i t c h o i l compartment. 4.1 Cleaning t h e d i v e r t e r s w i t c h o i l compartment a n d t h e t a p - c h a n g e r head F l u s h i n s i d e o f t h e o i l compartment a n d t h e t a p - c h a n g e r head w i t h new t r a n s f o r m e r o i l ( f i g. 4 ). Remove all adhesive soot particles, f l u s h again w i t h new o i l a n d pump off t h e whole oil. fig. 4 4.2 Inspection o f t h e d i v e r t e r s w i t c h o i l c o m p a r t m e n t Check state of connecting contacts and hard paper cylinder. M A D 135  AT) MASCHINENFABRIK |2 0 8 082 \ REINYAUSEN On=Llo=»2 T a 2 - C r a n g e r T y p e D A Fiir diese technische Unterlage behalten wir uns gemalt (RATER Inspection Instructions 09.12.80/pa ge 5 4.3 Inspection of Geneva g e a r D I N 34, Abschnitt 2.1, alle Rechte vor. B e f o r e c o n t r o l l i n g t h e Geneva g e a r i n g i t i s necessary t o remove t h e g e a r p l a t e a n d note p r i o r t o t h e r emoval t h e m a r k s o f t h e i n d i c a t i n g discs a n d g e a r p l a t e as well as t h e p o s i t i o n o f t h e c o u p l i n g ( f i g. 5 a n d c o r r e s p o n - d i n g adjus tment p l a n ). fig. 5 P r i o r t o t h e removal o f t h e g e a r p l a t e loosen c o u p l i n g o f d r i v e shaft b y removing t h e c o u p l i n g b o l t a n d s l i d i n g t h e c o u p l i n g tube onto t h e worm shaft. After r e m o v a l o f t h e f o u r s c r e w s M 1 0 ( s i z e 1 7 ) a n d t h e l o c k i n g p l a t e s i t i s p o s s i b l e t o w i t h d r a w t h e g e a r p l a t e. T a k e care n o t t o remove t h e G e n e v a cam wheel with the gear plate ( f i g. 6 and 7 ). fig. 6 M R D 135  BT, AT ARES ere AR ATI TY po] mate Taw aT a Renin Fiir diese technische Unteriage behalten wir uns gemafd MR Ferause r On-Load Tap-Cha nger Type D A 208 083 ——— inspect ion Instruc tions 09.12.8 0/page 6 Before remov ing t h e Genev a cam wheel note t h e positio n o f r o l l e r bolt DIN 34, Abschnitt 2.1, alte Rechte vor. and t h e 0 mark ( f i g. 7 ). fig. 7 4.4 Control w o r k C h e c k t h e r a d i a l c l e a r a n c e betwee n r o l l e r b o l t a n d r o l l e r o f t h e Geneva cam wheel. Maximum play 0,6 mm ( f i g. 8). - fig. 8 ( I n case replace ment i s necess ary see replace ment w o r k. ) M A D 135  vo - men time tym meme alm Ee woo mma ee Fea ae ot ry — SUURPTR SUPITER S U P PAL hie ad bi PRE wn wm A ASCHINENFABRIK [A] REmnauseN O n - i o a d Tap-C hange r T y p e D A 208_033 Inspection Instructions 09.12.80/page 7 Fiir diese technische Unterlage behalten wir uns gemifl 4.5 Mounting of the gear plate D I N 34, Abschnitt 2.1, alle Rechte vor. When installing t h e Geneva cam wheel note t h e s l i d i n g d i s k s i t u a t e d b e t - ween t h e Geneva cam wheel a n d t h e b u s h ( f i g. 8 ) M o u n t i n g t h e g e a r p l a t e i s made stepwise i n the reverse order of t h e disassembling p r o c e d u r e ( n o t e m a r k s a n d disassembly p o s i t i o n ). Secure fixing s c r e w s o f g e a r p l a t e a n d c o u p l i n g bolts. 4.6 Inspection of tap-changer head cover C h e c k safety diaphragm for deflection a n d o x i d a t i o n. I n case o f replace- m e n t see t h e item dealing w i t h replacement w o r k. After c h e c k i n g t h e safety diaphragm p u t cover o n t h e t a p - c h a n g e r head ( n o t e g a s k e t ) a n d attach i t b y some screws. 5. REPLACEMENT WORK ON TAP-CHANGER HEAD 5.1 Roller b o l t o f Geneva cam wheel (fig. 9) Remove o u t s i d e c i r c l i p a n d r o l l e r. Remove rivet b y u s i n g drill 1 1 - 1 1 , 5 mm # a n d r e m o v e b o l t. Press i n replacement b o l t a n d r i v e t b y u s i n g a s u i t a b l e s u r f a c e. Check t h e b o l t f o r p e r f e c t seat. Attach r o l l e r a n d circlip.. 1 i 120, t n. I: ——it : CT ILD | fig. 9 MAD 13 a CATR - oT - — —~— T I La E -. rv CE Pre eA - amr em. mm _— aaa LE » bo a in te I v r fhanette Soman; L a CA Fv § itn IMIR rensauses™™™ On-Load Tap-Changer Type D A 208 033 Fiir diese technische Unterlage behalten wir uns gemiR Instructions 09.12.80/page 8 IEE EA — — — — Inspection 5.2 Safety diaphragm D I N 34, Abschnitt 2.1, alle Rechte vor. A f t e r remov al o f i t s f i x i n g s c r e w s , o f p r e s s u r e flange t h i s l a t t e r can b e r e m o v e d t o g e t h e r w i t h d i a p h r a g m a n d gaske ts. The re-installation is to be done in the reverse orde r. See to it th at t h e p r o t e c t i v e p a i n t o f t h e diaphr agm is expos ed t o t h e side o f atmos - phere (fig. 10). ! protective coating | f i g. 10 1 [] i 6. SEPARATE FLANGES OF s u p p o r t i n g c y l i n d e r w i t h i n s e r t head as well as disasse mble a n d reassem ble insert head. : 6.1 Separate flanges of supporting cylinder R e m o v e f l a n g e s c r e w s M 6 ( s i z e 1 0 ) w i t h n u t s a n d l o c k washers. R e m o v e s u p p o r t i n g c y l i n d e r i n vertical position. Depose s u p p o r t i n g c y l i n d e r o n a suitable s u r f a c e a n d t a k e care o f t h e switch crank tube ( f i g. 11). f i g. NM M R D 135 WE Ty a Far CA E Va = WET am wl wk Ree bc dwt m— oy T h AT mr pt Tampa - al, CT ATS — eT A eEme — pn” Co rm ny A Eo Ee WR Crd bat wt EadieLL - mERee AA Aa VR Femasen™>™ ’ 2 Fiir diese technische Unterlage behalten wir uns gemat On-Loa d Tap-Ch anger Type D A 208 083 Inspect ion i n s t r u c t i o n s 09.12.8 0/page 9 6.2 Disassembly of insert head D I N 34, Abschnitt 2.1, alle Rechte vor. Remove outside c i r c l i p s w i t h washer as well as d r i v e c r a n k ( f i g. 1 2 ). f i g. 12 Loosen t h e f o u r n u t s M12 ( s i z e 1 9 ) w i t h lock sheets a n d remove e n e r g y accumu lator ( f i g. 13). Loosen t h e two screws M$ ( s i z e 1 3 ) w i t h l o c k sheets a n d remove s u p p o r t bow with energy accumulator lever ( f i g. 14) f i g. 14 M H D 13% Fiir diese technische Unterlage behalten wir uns gemat MIR Featis es*™ On-Lo ad Tap-C hange r Type D A 208 083 D I N 34, Abschnitt 2.1, alle Rechte vor. Inspec tion I n s t r u c t i o n s 09.12. 80/pag e 10 Remo ve outsid e c i r c l i p s w i t h washe rs as well as pawl w i t h t r i p l e v e r a n d note reference mark (fig. 15) Remov e s u p p o r t s a n d sliding disk on roller bolt of switch crank (fig. 16) 6.3 Cleaning the support cylinder with insert head Clean t h o r o u g l y w i t h t r a n s f o r m e r o i l t h e s u p p o r t c y l i n d e r w i t h switch crank tube as well as all parts of the insert head. 6.4 Control work State of support cylinder and switch crank tube (hard paper) Check radial clearance between rolier bolt and roller as well as slide s q u a r e b o l t a n d slide s q u a r e o f e n e r g y accumula tor l e v e r. Maximum admissib le clearance 0 , 6 mm ( f i g. 1 7 ). M R D 135  Siw EF T e h "edt Slr Ge —— [ES Va I M I R Feimiisen > " On-Load Tap-Cha nger Type D A 208 083 Fiir diese technische Unterlage behalten wir uns gemiR Lo ———— Inspecti on Instruct ions 09.12.80 /page 11 I n s p e c t shock a b s o r b e r s p r i n g s (replac ement after each 100.000 s w i t c h - i n g o p e r a t i o n s ) , e n e r g y accumulator s p r i n g (replacement afte r each DIN 34, Abschnitt 2.1, alle Rechte vor. 400.000 operati ons) a n d p a w l s p r i n g for deform ations o r c r a c k s o r mechanical d i s t o r t i o n s. ( I n case replacement i s necessary see th e item dealing w i t h replace ment work.) 6.5 Reass embly o f i n s e r t h e a d T h e reasse mbly o f i n s e r t head i s t o b e done stepwi se i n t h e r e v e rse o r d e r. See t o i t t h a t a f t e r t i g h t e n i n g t h e f o u r n u t s M12 ( f i g. 1 3 ) b et- ween t h e e n e r g y accum ulator slide a n d g u i d i n g b a r s t h e clearen ce is a b o u t 0 , 4 m m. L o c k all b o l t i n g c o n n e c t i o n s. REPL ACEM ENT WORK 7.1 Roller and slide square bolts Remove rivet of rivetin g disk b y drilling (drill 9 - 9,5 mm @#) and of bolt ( d r i l l 13,5 - 14 mm @) ( f i g. 18). SRRRLALLAR A N S 2 zZZ Z Z Tak Sry Z IA fig. i 18 === ~ + BH : ¢ Removal o f t h e r i v e t i n g d i s k , r o l l e r as well as s q u a r e a n d b o l t. Press i n t h e replacem ent b o l t a n d r i v e t b y u s i n g a s u i t a b l e s u p p o r t. Check for p e r f e c t seat o f b o l t a n d smooth moveme nt o f r o l l e r o r s l i d e square. 7.2 S h o c k absorb ing spring s L o o s e n s c r e w M16 ( s i z e 1 0 ) o f a h o l d i n g p a w l o n t h e s u p p o r t. D u r i n g replacem ent note n u m b e r o f shock absorbin g s p r i n g s a n d compens ating s p r i n g s , i f a n y , w h i c h h a v e t o b e u s e d a g a i n a n d f i t t e d a t t h e same place. I n o r d e r t o a v o i d i n t e r c h a n g e o f shock absorbin g s p r i n g p a c k s , i t i s recomme ndable to change one p a c k a f t e r t h e o t h e r ( f i g. 1 9 ). A f t e r installing the holding pawl secure fixing screw. M R D 135  ur “ o i n l o nIt 2m a e T e ILE ra For TRS at Ce Hr gS R E E T yx mee Din THe WELLE ahs K MIR renrasse y On-Load T a p - C h a n g e r T y p e D A 208 083 ———————— Fiir diese technische Unterlage behalten wir uns gemiB D I N 34, Abschnitt 2.1, alle Rechte vor. Inspecti on Instruct ions 09.12.80 /page 12 - f i g. 19 7.3 Energy accumulator spring Loosen t h e ten c o u n t e r s u n k head screws M5x10, remove g u i d i n g rails, withdraw spring unit of energy accumulator and accumulator energy slide (fig. 20). f i g. 20 F i t t i n g t h e new s p r i n g u n i t should be done i n t h e r e v e r s e o r d e r w i t h the countersunk head screws secured by punching. Take care that the spring force indicated on the front of the spring screw coincides (spring f o r c e = 2 x 35 k g o r 2 x 350 N ). S p r i n g f o r c e d i f f e r e n c e s o f + 6 $ a r e permissible. 8. D I S A S S E M B L Y O F D I V E R T E R S W I T C H U N I T T Y P E D 0444 I n o r d e r to clean t h e d i v e r t e r s w i t c h a n d c h e c k c o n t a c t wear i t i s necessary to remove t h e movable contact systems. M A D 135  MASCHINENFABRIK Fiir diese technische Unterlage behalten wir uns gemafl VIF renalse n On-Load Tap-Changer Type D A 208 083 Inspection Instructions 09.12.80/pag e 13 8.1 Removal of t h e moving contact systems D I N 34, Abschnitt 2.1, alle Rechte vor. I n o r d e r to remove t h e contact systems i t i s necessary to s eparate the t h r e e d i v e r t e r s w i t c h u n i t s. T h e y can b e w i t h d r a w n after looseni ng the f l a n g e screws M6 ( s i z e 1 0 ) w i t h lock washe rs. D u r i n g t h i s operat ion note t h e refere nce m a r k s o n t h e c o u p l i n g t u b e s a n d switch spindl es as well as t h e f i t t i n g b o l t s ( f i g. 2 1 , 22 a n d 23). M R D 135 Fiir diese technische Unterlage behalten wir uns gemaR IMR reinmausen = " On-Load Tap-Chan ger T y p e D A 208 083 D i N 34, Abschnitt 2.1, alle Rechte vor. Inspectio n I n s t r u c t i o n s 09.12.80 /page 14 Before w i t h d r a w i n g t h e contact systems remove o n the upper contact cylinder the potential connection ( f i g. 24) after loosening n u t M6 (size 10 selfloc king) screw M6 (size 10) on the separa ting flange a n d screw M6 ( s i z e 1 0 ) o n t h e s u p p o r t t h e potenti al connect ion ( f i g. 2 4 ). ——— =e ENNUPUINUURUSWO SSIE After loosening the three nuts M6 (size 10 selflocking) a n d s c r e w s M6 ( s i z e 1 0 ) o n t h e separatin g flange remove the upper screening ring on the middle and lower contact cylinder ( f i g. 25) Loosen fixing screws M6 (size 10) on support and screws M6 (size 10) on the r e s i s t o r connections ( t a k e care of the connecting b u s h e s ) ( f i g. 26 a n d 27). M H D 134  Co m a y -o hatas LAE “ a ws.. SER acim 7 i re co Tn Sys TTR AAA 11 = ORI Lh, wt aes a ERE Lm Lame NRE = a 0 a om 7 S e te i? K Fiir diese technische Unterlage behalten wir uns gemif NAF reimavse n On-Load Tap-Changer Type D A 208 083 D I N 34, Abschnitt 2.1, alle Rechte vor. Inspection Instructions 09.12.80/page 15 T o avoid i n t e r c h a n g i n g c o n - tact s y s t e m s , n u m b e r s a r e indicated on support and g u i d i n g p l a t e which a r e t o be noted. P u t u p s i d e d o w n contac t c y l i n d e r loosen screw M6 (size 10) on the current r a i l a n d b r i n g contact system by rotating the permanent main contact into an inter- mediate position ( f i g. 2 8 ). Remove movable contact system from contact cylinder b y a p p l y - i n g a n axial p r e s s u r e t o t h e bottom g u i d i n g p l a t e ( f i g. 2 9 ). M R D 135  a ICI... ©aN EC Py Er 4 et = P r eI MASCHINENFABRIK 208 083 MR REINHAUSEN On-Load Tap-Changer Type D A Fiir diese technische Unterlage behaltan wir uns gemald Inspect ion I n s t r u c t i o n s 09.12. 80/pag e 16 8.2 C l e a n i n g t h e d i v e r t e r s w i t c h unit D I N 34, Abschnitt 2.1, alle Rechte vor. Clean thoroughly contact cylinder, coupling tubes and moving contact systems w i t h r e s i s t o r s b y u s i n g new t r a n s f o r m e r o i l. F u r t h e r a l l h a r d p a p e r p a r t s a n d t r a n s i t i o n r e s i s t o r s a r e t o b e c l e a n e d from o i l s o o t. F l u s h t h o r o u g h l y a l l p a r t s w i t h n e w oil. 8.3 C o n t r o l w o r k Check of contact wear on t h e moving a n d f i x i n g s w i t c h i n g a n d a u x i l i a r y contacts ( f i g. 30 a n d 3 1 ). Note t h a t t h e sum o f l e v e r clearanc e a n d contact wear t i l l the n e x t inspection should n o t be more than t h e m a x i - mum permissible wear (fig. 32). fig. 30 b — (3 — — EF E g AALS AA == & NN 2 REINER 1 on N N N [ iy f i g. 32 = 23 = lg | 1] _ w e a r surface - T° conidet material: M H D 139 thickness of corsast coating pertias.ble cantact wear UE: man  IIS Ce Bd at VE PEE I Lenk ber pT ERPCRPIpr ce T h a CYRELE FTI [V4 I rennausen or On-Load Tap-Changer Type D A 2u8 083 Fir diese technische Unteriage behalten wir uns g e m s SEE FEE Inspection Instructions 09.12.80/page 17 Check state o f contac t b r a i d s a n d moving contac t system b y r o tating DIN 34, Abschnitt 2.1, alle Rechte vor. s w i t c h s p i n d l e for s m o o t h movem ent. C h e c k state a n d s p r i n g s o f s l i d i n g and o u t p u t contac ts as well as distanc e o f t h e s p a r k g a p s ; s p a r k gap distanc e = 3 , 5 mm ( f i g. 3 3). State o f b r a i d s , compre ssion s p r i n g s a n d contac t r o l l e r s o f perma nent main c o n t a c t. Replac ement o f perma nent main contac ts after each 300.00 0 s w i t c h i n g operat ions o r , i f contac t r o l l e r cleare nce i s about 1 mm ( f i g. 3 4 ). : f i g. 33 f i g. 34 Visual control o f resistor s and h a r d p a p e r parts. REASSE MBLY OF DIVERT ER SWITCH INSERT 9. 1 Mounting moving contact systems P r i o r t o i n s t a l l i n g t h e m o v i n g c o n t a c t s y s t e m i n t o the c o n t a c t c y l i n d e r i t i s necessary t o cock t h e contact system. P r i o r t o c o c k i n g a c o c k i n g hook i s t o be i n s e r t e d i n t o t h e e x i s t i n g hole o f t h e lower g u i d i n g p l a t e a n d t h e s l i d i n g shoe o f t h e s w i t c h i n g contact ( f i g. 3 5 ). T h e c o c k i n g o f contact system i s p e r f o r m e d b y r o t a t i n g c l o c k - wise t h e contact system o n t h e d r i v e b o l t s t i l l t h e second c o c k i n g hook engages t h e hole o f t h e s l i d i n g shoe o f a u x i l i a r y contact ( f i g. 36). M P D 1356  I M I R rewrausen™™ On-Load Tap-Chang er Type D A 208 083 ———— Fiir diese technische Unterlage behalten wir uns gemiR D I N 34, Abschnitt 2.1, alle Rechte vor. Inspectio n Instructi ons 09.12.80 /page 18 fig. 35 °° f i g. 36 Close r i g h t h a n d side o f permane nt main contact ( f i g. 3 7 ) a n d i n t r o - d u c e cocked contact system i n t o t h e c o r r e s p o n d i n g c y l i n d e r (compar e n u m b e r s ) c a r e f u l l y t i l l t h e system reaches i t s m o u n t i n g p o s i t i o n. T a k e c a r e n o t to damage the s c r e e n i n g r a i l s a n d r e s i s t o r s a n d m a k e s u r e that the i li r a i l i s s i t u a t e d o n t h e copper bow between t h e two b r a i d s fig. 38). f i g. 37 f i g. 38 A t t a c h g u i d i n g plate t o t h e s u p p o r t w i t h screws M6 ( s i z e 1 0 ) ( f i g. 2 6 ). M R D 135  MASCHINENFABRIK ). CTL do. MRE On-Loac. i. wisiige’ ype o 4 ~ Inspection I n s t r u c t i o n s 09.12.80/page 19 Fiir diese technische Unterlage behalten wir uns gemil Remove cocking hooks b e g i n n i n g b y c a r e f u l l y m o v i n g clockwise t h e c o n - tact system w i t h t h e o p e r a t i n g key i n both d i r e c t i o n s ( f i g. 3 9 ). D I N 34, Abschnitt 2.1, alle Rechte vor. T h e r e u p o n check c o c k i n g hook ( t w o p i e c e s ) , w h i c h a r e below t h e d i v e r t e r s w i t c h , for completeness a n d a n y damages. Attach c u r r e n t r a i l , r e s i s t o r connections a n d s c r e e n i n g r i n g s , i f a n y , as well as potential connection to t h e u p p e r contact c y l i n d e r a n d secure all bolting connections. Move anticlockwise t h e t h r e e contact systems b y o p e r a t i n g key t o t h e moun- t i n g position ( f i g. 3 9 ). f i g. 39 9.2 C o u p l i n g t h e t h r e e d i v e r t e r switches T h e c o u p l i n g o f the t h r e e d i v e r t e r switches i s done i n the reverse o r d e r. T a k e c a r e t h a t t h e r e f e r e n c e m a r k s o n t h e c o u p l i n g t u b e s correspond t o t h e s w i t c h spindles ( f i g. 2 3 ). 9.3 Mounting of supporting cylinder with insert head P r i o r t o mounting t h e s u p p o r t i n g c y l i n d e r w i t h i n s e r t head note t h e e n e r g y accumulator p o s i t i o n ( f i g. 1 2 ) , s i t u a t i o n o f t h e fitting b o l t hole and of the fitting bolt of the supporting c y l i n d e r. The supporting c y l i n d e r i s to b e i n s t a l l e d i n t h e v e r t i c a l a n d c e n t r i c a l p o s i t i o n ( i t e m 6. 1 ). B o l t both s e p a r a t i n g flanges together a n d secure b o l t i n g c o n n e c t i o n b y l o c k washers. 9.4 M e c h a n i c a l f u n c t i o n c o n t r o l o f d i v e r t e r s w i t c h i n s e r t a n d check of the resistance value F o r c o n t r o l l i n g t h e mechanical f u n c t i o n operate key t h e d i v e r t e r s w i t c h i n s e r t w i t h t h e o p e r a t i n g k e y a n d check t h e resistance values ( f i g. 4 0 ). M R D 135