Drive shaft-ExOperating Instructions BA276/02

www.reinhausen.com

2 276/02/01/0

Contents

Contents

NOTE

Changes may have been made to a product after going to press with this documentation.

We expressly reserve the right to make changes to a products technical data and design as well as changes tothe scope of delivery.

In all cases, the information submitted and agreements concluded during processing of the quotation and orderin question shall be binding.

1 General ......................................................................................................................................................................................... 3

1.1 Safety instructions ........................................................................................................................................................ 3

1.2 Specified application ................................................................................................................................................... 3

2 Design/Types ............................................................................................................................................................................... 4

3 Standards and regulations ................................................................................................................................................... 5

3.1 Type of ignition protection "non-electrical explosion protection" .............................................................. 5

4 Measures for complying with the explosion protection requirements ............................................................... 6

4.1 Explosion-proof drive shafts ....................................................................................................................................... 6

4.2 Grounding of the drive shaft and bevel gear covers ........................................................................................... 6

5 Installation of the drive shaft-Ex with insulator ......................................................................................................... 6

6 Installation of the drive shaft covering ........................................................................................................................... 8

6.1 Installation of the guard plate for the horizontal drive shaft ............................................................................. 86.2 Installation of the telescope protective tube for the vertical drive shaft ........................................................ 9

Dimension drawing bevel gear ................................................................................................................................................................ 10

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1 General

1.1 Safety instructions

All personnel involved in installation, commissioning,operation, maintenance or repair of the equipment must:

- be suitably qualified and- strictly observe these Operating Instructions.

Improper operation or misuse can lead to

- serious or fatal injury- damage to the equipment and property of the user- a reduction in the efficiency of the equipment.

Safety instructions in this manual are presented in threedifferent forms to emphasize important information.

WARNING

Installation and commissioning of the drive shaft may onlybe carried out by qualified, skilled personnel and understrict observation of these Operating Instructions.

It is the responsibility of the user to ensure that the driveshaft is used for the specified application only. For safetyreasons, do not carry out any unauthorized work, i. e.during installation, modification, commissioning andalteration of the drive shaft without first consulting MR!

The trouble-free operation of motor drive, on-load tap-changer and transformer may be put at risk.

1 General

1.2 Specified application

CAUTION

The serial numbers of motor-drive, on-load tap-changer oroff-circuit tap-changer, drive shafts and bevel gear mustcorrespond.

WARNING

This information indicates particular danger to life andhealth. Disregarding such a warning can lead to serious orfatal injury.

CAUTION

This information indicates particular danger to the equip-ment or other property of the user. Serious or fatal injurycannot be excluded.

NOTE

Notes give important information on specific subjects.

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2 Design/Types

The drive shaft is the mechanical connection betweenmotor-drive and on-load tap-changer head. The changefrom the vertical to the horizontal direction is performed bythe bevel gear (see dimension drawing 892916).

Accordingly, the vertical drive shaft has to be mounted bet-ween motor-drive and bevel gear and the horizontal driveshaft between bevel gear and on-load tap-changer or off-circuit tap-changer.

The drive shaft is designed as a square tube with insulatorand is coupled at both ends by two coupling brackets andone coupling bolt to the driving and drive shaft ends of theunit to be connected.

Minor axial displacement can be tolerated as long as it doesnot exceed 35 mm per 1000 mm square shaft length (thatcorresponds to 2).

Square tubes, coupling brackets, coupling bolts, screws, andlocking washers are corrosion-resistant. We therefore recom-mend not to apply the same external coating to these parts asto the transformer tank.

The square tubes and the guard plate are supplied in over-lengths (graded standard lengths). These parts must be cut tothe correct length when mounted on the transformer.

Graded standard lengths of square tubes for motor-driveED-Ex: 400 - 600 - 900 - 1300 - 1700 mm.

Max. total shaft length, from motor-drive to last pole is 15 m!

2 Design/Types

CAUTION

When mounting the drive shaft make sure that the shaftends to be connected are exactly aligned.Otherwise the trouble-free operation of the motor-driveand the on-load tap-changer cannot be guaranteed.

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3 Standards and regulations

3 Standards and regulations

WTemperature class

Explosion group

Equipment category

Equipment group

Sign for explosionprotection

WII 2G IIC T4

3.1 Type of ignition protection "non-electricalexplosion protection"

W

Equipment in this category is intended for use in areas in which explosive atmospherescaused by mixtures of air and gases, vapors or mists or by air/dust mixtures are presentcontinuously, for long periods or frequently.

Equipment in this category is intended for use in areas in which explosive atmospherescaused by gases, vapors, mists or air/dust mixtures are likely to occur.

Equipment in this category is intended for use in areas in which explosive atmospherescaused by gases, vapors, mists, or air/dust mixtures are unlikely to occur or, if they do occur,are likely to do so only infrequently and for a short period only.

for g

ases

for p

owde

r

Definition

1G(0)

2G(1)

3G(2)

1D(20)

2D(21)

3D(22)

Equipment category / zone classification

Equipment in this category is intended for use in underground parts of mines as well as those parts of surface installations of such minesendangered by firedamp and/or combustible dust.

Equipment in this category is intended for use in other areas in which explosive atmospheres may be present.

Equipment groups

I

II

d flameproof enclosuree increased safetyl intrinsic safety (la, lb)

m encapsulationo oil immersionp pressurized apparatusq powder filling

n protection type n (only zone 2)

n A: non-sparking apparatusn C: sparking apparatus with special

protection of contactsn R: restricted breathing enclosuresn L: energy-limited equipmentn P: equipment with simplified

n-pressurization

Protection types

Temperature Max. equipment Ignition temperatureclass surface temperature of the inflammable

substances

T1 450 C > 450 C

T2 300 C > 300 C < 450 C

T3 200 C > 200 C < 300 C

T4 135 C > 135 C < 200 C

T5 100 C > 100 C < 135 C

T6 85 C > 85 C < 100 C

Gases, vapors Min. ignition EN/IEC(examples) energy

(mJ)

- ammonia -- IIA

- acetone, methane, ether, petrol, benzene,diesel, petroleum, acetic acid, fuel oil, hexane,methane, propane

- ethylene, isoprene, town gas 0.06 IIB

- hydrogen, acetylene, carbon disulfide 0.02 IIC

Explosion group Temperature classes

The drive shafts-Ex from the MR range of supply are alwayscertified for II 2G IIC T4.

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NOTE

Grease the coupling bolts, the coupling brackets and theball heads (e. g. with adhesive grease ISOFLEX TOPAS L 32).

5 Installation of the drive shaft-Exwith insulator

Proceed for installation as follows (see fig. 1):

Determine dimension A between the two shaft ends.

Cut the square tube to the dimension LR = A - 179 mm.Deburr the cut.

Now bolt the double coupling shell with the insolator tothe square tube. Tighten the bolts with a torque of 9 Nm.

Loosely attach one coupling piece (2 coupling brackets)with 4 screws M6 x 25/w. s.10 and 4 locking washers andslide it onto the square shaft up to the dead stop.Tighten the screws with a torque of 9 Nm. For installationof the telescope protective tube, see point 6.2

4 Measures for complying with theexplosion protection requirements

4 Measures for complying with the explosion protection requirements5 Installation of the drive shaft-Ex with insulator

4.1 Explosion-proof drive shafts

The explosion-proof drive shafts are always supplied with aninsolator.

The insolator is always to be mounted on the side facing thedrive (fig. 4).

4.2 Grounding of the drive shaft and bevel gearcovers

The drive shaft and bevel gear covers are to be groundedseparately. Assembly instructions are contained in section 6(fig. 5).

CAUTION

Check to make sure that the motor protective switch istripped before starting the coupling procedure, otherwisethe motor-drive can start up accidentally.

Insert the coupling bolt into one shaft end and slide thesquare shaft over it together with the coupling piece(fig. 2). Provide the opposite end with a coupling bracketand the coupling bolt. Fit in the square shaft by the endand connect it with the second coupling bracket below by4 screws M6/w.s. 10 and 4 locking washers.

Set an axial clearance of 3 mm between the coupling boltand one coupling piece (fig. 3).

Preliminary tightening of the screws at approx. 6 Nm inpreparation for the alignment.

Carry out final tightening of the screws only afteraligning the on-load tap-changer and the motor-driveunit (see Operating Instructions BA 138 for motor-driveunit ED, chapter 3.3 "Coupling on-load tap-changer andmotor-drive"). Tighten the screws M6/w. s. 10 with a max.torque of 9 Nm.

Assembly of the horizontal drive shaft is to be carried outin the same sequence (fig. 4).

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5 Installation of the drive shaft-Ex with insulator

NOTE

The middle bore holes of the coupling brackets can be usedfor lead seals.

1 01430803

LR = A -179 mm

A - Dimension betweenshaft ends

LR - Length ofsquare tube

2

4

3 726137726137

726137

Sect

ion

A-A

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6 Installation of the drive shaft covering

6 Installation of the drive shaftcovering

KHW 870-4KHW 870-46

CAUTION

According to IEC standard 60214, all drive shafts locatedon the outside of the transformer need to be protectedwith safety coverings.

All drive shafts are to be guarded by a separately groundedcover.

6.1 Installation of the guard plate for the horizontaldrive shaft

Proceed for installation of the guard plate as follows (seefig. 5):

Determine dimension B over the connecting flanges ofthe housings.

Cut down the guard plate to dimension LSB = B - 2 mm,Deburr the cut and protect it against corrosion by a coatof paint. The vertical cover must be cut to size on the sideopposite the identification nameplate.

Drill holes = 11 mm for separate grounding of the coverfig. 5).

To install the horizontal guard plate (uniform lengthsbetween 400 and 2,300 mm), please pay attention to thefollowing:Slide the guard plate over the connecting flanges andfasten at each end with a hose clip (fig. 6).

Each of the covers is to be connected to potential by aground wire using the screws and contact washerssupplied. The fastening screw for the ground wire must bemounted on the inside to avoid collision with the screwhead.

The bevel gear must be screwed on both sides for attach-ment to the transformer using the M16 screws to ensurepermanent grounding.

6

MR

LSB = B - 2 mm

5

1. Drill grounding boreholesof 11 mm

2. Drill two boreholes of 4.5 mmand turn in self-tapping screw

A Dimension between shaft endsLSR Length of the extended

telescopic protective tubesB Inside width between the housingsLSB - Length of the guard plate

726137

Adapter ring

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6.2 Installation of the telescope protective tube forthe vertical drive shaft

Proceed as follows for installation of the telescope protectivetube (see fig. 5):

Determine dimension A (V1 = A + 453 mm) between end ofthe shaft of ED and the bevel gear.

Now cut down inner and outer tube to the dimensionA/2 + 100 mm (shorten inner tube on the unslit side).Make sure that it is not deformed and that it is deburredthoroughly so it will slide easily into the outer tube.110 mm as seen from the slit side, bore a hole ( 11 mm)in the inner tube for the separate ground (fig. 5).

Before the vertical drive shaft is installed, the adapter ringmust be located over the bearing neck of the bevel gearand the coupling bolts must be slid in (fig. 5).

First screw the two bottom coupling brackets to the driveshaft.

Now slide the two telescope protective tubes (inner tubewith slit pointing down and outer tube with slit pointingup slid over the inner tube) over the drive shaft mountedon the output shaft of the motor drive and align this withthe bevel gear.

Slide in the top coupling bolts. Then mount the topcoupling brackets with 4 self-locking screws (M6 x 25/SW10) to the drive shaft with an axial play of 3 mm.Now connect the bottom protective tube (inner tube) topotential with a grounding wire using the included screw(mount screw head inside due to danger of collision) andcontact washers. Then secure with a hose clamp to thebearing neck of the motor-drive. Now slide the topprotective tube over the adapter on the bevel gear andsecure here with a hose clamp.

Then bore two holes ( 4.5 mm) in each of the two tubesapprox. in the middle (see fig. 5) and displaced by 180 sothat a galvanic connection is created with the twoincluded self-tapping screws and the tubes are heldtogether (fig. 5).

6 Installation of the drive shaft covering

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Bevel gearDimension drawing

8929166E

e1

= 20

5 fo

r sta

ndar

d de

sign

e2

= 21

5 fo

r des

ign

with

bal

l joint

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BA 276/02 en 0707/10 276/02/01/0 F0143701 Printed in Germany

Maschinenfabrik Reinhausen GmbH Phone +49 941 40 90-0Falkensteinstrasse 8 Fax +49 941 40 90-11193059 Regensburg, Germany E-mail sales@reinhausen.com

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