EA747e-MZ-4.4

INSTRUCTION FOR MOUNTING, OPERATION AND MAINTENANCE

OF MOTOR DRIVE MECHANISM TYPE МZ - 4.4

ЕА 747e

INSTRUCTION FOR MOUNTING,OPERATION AND MAINTENANCE OF

MOTOR DRIVE MECHANISM TYPE МZ - 4.4

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Contents

1. GENERAL NOTES …………………………………………………………………………………………4

1.1 SAFETY INSTRUCTIONS ................................................................................................................................... 4 1.2. APPLICATION ................................................................................................................................................. 4 1.3 APPLICATION AND MAJOR FUNCTIONS ............................................................................................................ 5

2. COMPLETE DELIVERY …………………………………………………………………………………….6

2.1. STANDARD COMPLETE DELIVERY ………………………………………………………………………..6 2.1.1. Basic units ………………………………………………………………………………………………………..6

2.2 TRANSPORTATION PACKAGING. ................................................................................................................ 7 2.2.1 Motor drive packaging ………………………………………………………………………………..7 2.2.2. Driving shafts packagin……………………………………………………………………………… 8

3. STORAGE………………………………………………………………………………………………………8

4. TECHNICAL DATA…………………………………………………………………………………………..9

5. MECHANICAL PART………………………………………………………………………………………..9

5.1 DESIGN – ( MZ – 4.4/ 11; ). ....................................................................................................................... 9 5.1.1. Protective cabinet ( MZ – 4.4/ 11; MZ – 4.4/ 10 )………..…………………………………………10 5.1.2 Hand crank ( MZ – 4.4/ 11 ). ……………………………………………………………………..10 5.1.3. Power converter with mechanisms and mechano-electrical control ……………………………….11 5.1.3.1 Power converter with mechanisms ( MZ – 4.4/ 02 ). …………………………………………11 5.1.3.2. Mechano-electrical control system (MZ-4.4/03; MZ-4.4/04; MZ-4.4/05) ……………………...11 5.1.4 . Operating and indicator panel ( MZ – 4.4/ 11)…………………………………………………...........12

6. ELECTRICAL PART ………………………………………………………………………………………..13

6.1 ELECTRICAL BOARD ..................................................................................................................................... 13 6.2. CIRCUIT DIAGRAM ...................................................................................................................................... 14

6.2.1. Electrical circuits ………………………………………………………………………………14 6.2.2. Operating principle ………………………………………………………………………………14 6.2.2.1. Commissioning ……………………………………………………………………………………..14 6.2.2.2. Step control ………………………………………………………………………………………14 6.2.2.3. End devices ......................................................................................................................................14 6.2.2.4. Protection for the direction of the revolution …………………………………………………..15 6.2.2.5. Restarting device ………………………………………………………………………………15 6.2.2.6. Locking device for overload ……………………………………………………………………..15 6.2.2.7. Locking devices for the control …………………………………………………………....15 6.2.2.8. Automatic passing of “dead” steps …………………………………………………………....15 6.2.2.9. Protection from undesired serial switching operations …………………………………………15

6.3. TERMINAL BLOCKS ...................................................................................................................................... 15

7. ASSEMBLY OF THE MOTOR DRIVE MECHANISM TO THE TRANSFORMER TANK …………….16

8. COUPLING OF THE MOTOR DRIVE MECHANISM TO THE OLTC ……………………………….16

9. COMMISSIONING ………………………………………………………………………………………..18

9.1. CHECKING OF STEP ACTION......................................................................................................................... 18 9.2. FUNCTIONAL CHECK OF THE END BREAKERS ............................................................................................... 18

10. TECHNICAL MAINTENANCE 18

10.1. MANUAL DRIVE LOCKING BREAKER Q3. .................................................................................................... 18 10.2. CONDITION OF THE COMMUTATOR ............................................................................................................ 18 10.3. END ELECTRICAL AND MECHANICAL INTERLOCKS .................................................................................... 19



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10.4. Heating …………………………………………………………………………………………………19 10.5. COUNTER ................................................................................................................................................... 19 10.6. CONTROLLER S11/S12 (MZ-4.4/05) ......................................................................................................... 19 10.7. CLEARANCES ............................................................................................................................................. 19 10.8. SEALING OF THE DOOR .............................................................................................................................. 19 10.9. VENTILATION OPENINGS ............................................................................................................................ 20

11. SPECIAL DESIGNS 20

12. ENCLOSURES 20



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1. General notes

1.1 Safety instructions

Installation and setting of the motor drive in running mode should be authorized and carried out only by duly qualified staff. Please follow the requirements of this “instruction manual”. Improper manipulation and operation may have the following effect: A compromised efficiency of this equipment; Damage of the equipment and property; Accidents having serious or fatal consequences. Corresponding safety requirements have been highlighted as follows: “NOTICE”, “ATTENTION” and “DANGER”. “NOTICE” – highlights an important information on a given technical issue or feature. “ATTENTION” – indicates a hazard related to the equipment. “DANGER” – indicates hazardous conditions for the equipment and the health and life of the staff operating it. Failure to follow applicable instructions may have fatal or lethal effects.

1.2. Application

The motor drive type MZ-4.4 must only be used to actuate the OLTC and commutators for transformer regulation.

“ATTENTION” The motor drive type MZ-4.4 can be mounted and exploited only with the OLTC, specified in the client’s order. No change in the equipment is permitted without a prior consultation with the manufacturer. For the correct usage of the motor drive the buyer bears all responsibility. “DANGER” Inadequate mounting in the course of installation or operation of the equipment may lead to accidents and staff injuries. “ATTENTION” All fire protection rules must strictly be observed.



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1.3 Application and major functions

The motor drive shall be used to actuate the regulator connected to it of type OLTC, and to correctly bring in action the relaying into the regulation diapason. The run is transmitted to OLTC consequently by means of a fast motion ( 440 revs per min.) motor drive outgoing shaft, vertical shaft, bevel gear / i =1:1/ and a horizontal shaft. The shafts are interconnected by means of small range cardan connectors. The running is made from the start switch of the engine regime and also by remote control mechanism. For checks and tunings manual actuation is also possible. The motor drive MZ - 4.4 has been supplied with all necessary protective devices and signaling system such as: final electrical and mechanical interlocks, or blocking at manual manipulation; switch to a single step with continuous compressed button, automatic passing through “dead” position, signaling lamps, switch counter. There is a function to “normal” position in the case when the out-going shaft is rotated in the wrong direction as a result of an incorrect phase sequence of the supply voltage. Every tap change operation, interrupted due to break of supply voltage is automatically completed after restoring of the power supply. Provision has been made to prevent uncontrolled serial switchings caused by an internal failure in the power control or failure to switch to the “normal” position (slide-off) due to inertia. A number displays the current operative status and is indicated either by means of an arrow which is seen in the motor drive monitoring screen or the remote control via an analogous or digital position indication. The readings of the “normal” position indicator are displayed on the signal board near the indicating arrow and so is the counter notifying of the number of switchings having been done. All elements of the motor drive are mounted in protective cabinet made of aluminum alloy and are accessible for servicing. To avoid accumulation of condensates, the inner space is heated by heating devices actuated by a thermostat (optionally, a hygrostat).



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2. Complete delivery

2.1. Standard complete delivery

Normally, the following is included in a standard package delivery: (fig. 1)

1. Motor drive type MZ – 4.4 2. Cardan connector 3. Vertical and horizontal shaft 4. Protective pipes or covers 5. Bevel gear 6. Tap-position indicator 7. Buttons for remote control Note: According to the customer request there may be alterations in the delivery units!

2.1.1. Basic units

The motor drive consists of three basic modules: Power converter with mechanisms and mechano-electrical control system; Electrical board;



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Protective cabinet. Additional equipment Remote control buttons; Remote tap-position indicator; Automatic voltage regulator; Monitoring system.

2.2 Transportation packaging.

The motor drive unit is delivered to the customer completely assembled. The package consists of two parts:

2.2.1 Motor drive packaging

Wooden case of the following parameters: B (880mм) х H (540mm) х L (1630mm) including: - Motor drive; - Remote tap-position indicator; - Buttons for remote control; - Units completing the OLTC including as follows: Crane for diverter switch taking out; Special wrench, protective relay, bevel gear; Enclosures.



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2.2.2. Driving shafts packaging

Wooden case of the following parameters: B (170mm) х H (275mm) х L (2000mm) including: Driving shafts; Cardan connectors; Protective pipes and covers

3. Storage. Please store the duly packed motor drive in dry conditions. ATTENTION! In case of a continuous storage of the motor drive prior to any operation or an idle time exceeding 8 weeks, the heater must be power supplied and put it into operation! ATTENTION! Please follow fire safety requirements!



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4. Technical data The technical data refers to the standard design and can be distinguished from those for the delivered construction.

Motor drive mechanism МZ - 4.4

Electric motor Output

0,75 kW

1,1 kW

Supply voltage 3АС 400/230 V

Current 2,0 / 3,5 А 2,8 / 4.8 А

Frequency 50 Нz

Synchro revolutions 1500 min -1

Outgoing (driving) shaft Rated torque

17 Nm

24 Nm

Rotation frequency ~ 440 min -1

Revolutions for one tap – change operation 33

Diameter 25

Duration of one tap – change operation ~ 4,5 s

Hand-crank revolutions for one tap – change operation

33

Supply voltage of the control circuit and heating АС 230 V, 50 Hz

Number of tap positions max 35

Heater power 2x150 W

Test voltage to Ground (without motor) 2,5 kV r.m.s. 1 min

Weight 104 кg

5. Mechanical part.

5.1 Design – ( MZ – 4.4/ 11; ).

The construction of the motor drive mechanism type MZ – 4.4 is built on three basic modules: - Protective cabinet; - Power converter with mechanisms and mechano-electrical control system; - Electrical board. The power converter ( 20 ) and the electrical apparatuses for control are put in the upper half of the protective cabinet ( 1 ) and are mounted and adjusted by the manufacturer. They are covered with a protective shield ( 19 ), which is sealed and provides access only to the buttons for control ( 21 ), apertures for the hand-crank and the indicators showing the data for the tap-change operations ( 14 ). In the lower half of the protective cabinet is provided space for the terminal blocks and the client’s electrical apparatuses (18), which can be accessed after opening the door with the handle ( 17 ).



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On the inner side of the cover are fixed a movable lamp for lighting (22), hand-crank (10 ) and a pocket ( 9 ) for keeping the wiring diagrams for connection.

5.1.1. Protective cabinet ( MZ – 4.4/ 11; MZ – 4.4/ 10 ).

The protective cabinet consists of two parts – a body ( 1 ) and a cover ( 2 ) cast from aluminum alloy with epoxy polyurethane coating system ( RAL 7032 ). The surfaces between the body ( 1 ) and the cover ( 2 ), the openings of the out-going shaft ( 4 ) and the plate for the cable inlets ( 5 ) are sealed. The level of protection with standard performance is IP54. The protective sealing of the outgoing shaft ( 4 ) is carried out in the two variants: - Variant І – „ Protective pipes” when using protective pipes for the vertical shaft. Variant ІІ – „ Protective cap” for unprotected and inclining vertical shaft. ( Enclosure MZ – 4.4/ 07 ). To the back wall of the body ( 1 ) are fixed two connecting bars ( 23 ) with openings for fixing them to the transformer tank. On the side walls of the body ( 1 ) are situated the ventilation labyrinth ( 15 ) systems protected against insects with nets. On the upper wall of the body there are loops ( 24 ) with openings for lifting of the motor drive mechanism. The cover ( 2 ) is joined to the body ( 1 ) by means of two hinges ( 6 ) and opens to the left. The angle of opening of the cover is 180°. The cover ( 2 ) is pressed to the body ( 1 ) by means of stretching handles ( 7 ). On request by the client, the cover can be opened to the right. The cover ( 2 ) and the body ( 1 ) are connected through an electrical potential connection ( 11 ). On the outer side of the body ( 1 ) is placed an earthing screw М12 ( 12 ).

5.1.2 Hand crank ( MZ – 4.4/ 11 ).

The hand crank ( 10 ) is used for manually setting into motion of the motor drive mechanism when performing adjustments or during emergencies.



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“DANGER”! When setting in motion the motor drive mechanism manually only its hand crank is used. When the hand crank is placed on the shaft the electrical switch turning off the supply voltage of the circuit of the electrical motor by the protective circuit-breaker QFM (18). When placing the hand crank, before turning it, check if the protective circuit-breaker QFM has turned off!!

5.1.3. Power converter with mechanisms and mechano-electrical control system

5.1.3.1 Power converter with mechanisms ( MZ – 4.4/ 02 ).

The power converter with mechanisms ( 1 ) is a module without maintenance. It contains an electrical motor with three phase alternating current, power transmission for motor and manual drive, and control gear with the following characteristics: - Outgoing shaft ( 2 ) – 440 revolutions per minute; 33 revolutions/ switching operation; - Shaft for manual drive ( 3 ) - 33 revolutions/ switching operation; - Shaft for the controller ( 4 ) – 1 revolutions/ switching operation; - Shaft for the position transmitter ( 5 ) – 1/ 40 revolutions/ switching operation; - Shaft for the tap-position indicator ( 6 ) – 1/ 40 revolutions/ switching operation; - Shaft for the “normal position” indicator ( 7 ) – 1 revolutions/ switching operation. In the power converter (1) a mechanical interlock is built in the outgoing shaft ( 2 ), which is set into motion by an adjustment lever ( 8 ). The gears are placed in an aluminum body and are lubricated with grease.

5.1.3.2. Mechano-electrical control system (MZ-4.4/03; MZ-4.4/04; MZ-4.4/05)

The mechano-electrical control system integrating apparatuses and the connected with them mechanisms as follows:



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The controller S11/ S 12 (35), operated by a cam disk (34) performs 1 revolution/switching operation. The controller (35) secures the step switching operation of the motor drive mechanism ( Enclosure MZ – 4. 4/ 05 ); Position transmitter – Enclosure MZ – 4. 4/ 03 containing contact rows ( 1 ) with different use; Micro switches SQ1/ SQ2 (1,2) for electrical interlock in both end positions; Micro switches SQ3 (3) for electrical interlock, making 2 to 3 revolutions after end “normal position”; The working diagram of the end electrical interlocks is shown in an Enclosure MZ – 4. 4/ 08. Micro switches S14 (4) for electrical protection against non-effective braking; Micro switches S13 (5) for signaling, that the motor drive mechanism is in “normal position”; Micro switches S15 for automatic passing through “dead steps”; Micro switches QE, switching on the lighting when the door is opened; End mechanical interlock of the outgoing shaft of the motor drive mechanism, which locks the movement 3 to 4 revolutions after end “normal position.

5.1.4 .Operating and indicator panel ( MZ – 4.4/ 11).

On the panel are situated: Working tap-position indicator ( 25 ) – black arrow and scale with numbers for the positions; Current regulation range indicator – two red arrows ( 26 ); “Normal position” indicator ( 27 ) - disk with 33 sectors and green zone. One sector corresponds to 1 revolution of the hand crank, and one revolution of the sector corresponds to one switching operation of the motor drive mechanism; Counter ( 28 ), six digital, mechanical, showing the total number of the performed tap-change operations; Switch “raise / lower” ( 21 ); Switch for “local” or "remote” control ( 29 ).



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6. Electrical part

6.1 Electrical board

The electrical board is mounted on the supporting frame, mounted on studs in the metal box. The assembly of the elements is made easier by the mounting rods and the cable ducts. Each unit is clearly marked for easy identification on the diagram, which is kept in the pocket of the door. In a standard design the electrical module contains the following components: - Protection of the motor with a disconnecting coil QFM; - Protection of the operating circuit QFS; - Protection of the auxiliary circuit QFE; - Switch for the control mode “local – remote” S3; - Switch for direction control “raise/lower” S”L-R”; - Direction contactors “raise/lower” К1/К2; - Auxiliary contactor for step action К4; - Contactor for dynamic stopping of the electrical motor К3; - Auxiliary relays К5;K6 -Relay for control of the power supply KF - Contact socket; - Heater 2x150 W; - Thermostat; - Terminal blocks. The connection of the panel with the electrical motor and the mechano-electrical control system is performed by plug-in terminal blocks, resistant to vibrations. The protective breakers, the contact socket and the thermostat are mounted in the lower part of the motor drive mechanism. For convenience during maintenance operations there is an opening in the door (18). The remaining apparatuses are situated in the upper part of the cabinet behind the protective shield, which protects the maintenance personnel from accidental contact with the current carrier parts.



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6.2. Circuit diagram

The circuit diagram of the motor drive mechanism is fully in compliance with the requirements of IEC 60214.

6.2.1. Electrical circuits

In the motor drive mechanism four types of electrical circuits are isolated: - Power circuit – provides the supply of the electrical motor; - Operating circuit – includes the elements, providing the control and correct functioning of the OLTC and the signalization of the work condition; - Auxiliary circuit – includes the contact socket, the movable lamp and the heater; Circuits for remote information of the work position of the OLTC. This division allows the operation voltage to be different from the phase voltage of the power supply (as it is in the standard production) or to be direct current. The power circuit is protected with a maximum current and thermal protection, and the operational and auxiliary – with maximum current.

6.2.2. Operating principle

6.2.2.1. Commissioning

When supplying a control impulse from the switch S”L-R” of the motor drive mechanism (when the switch S3 is in position “local”) or from the remote control panel in the control room (or a signal from an automatic regulator of voltage), when the switch S3 is in position “remote”, the motor drive mechanism is set into motion and one tap-change operation is performed of the OLTC in the respective direction.

6.2.2.2. Step control

The electric diagram sets in motion the OLTC only at one full step if there are signals, which are constant or repeated nonstop, as well as simultaneous from different sources during one switching operation. This is provided also in the cases of ground fault or disconnection of a control conductor.

6.2.2.3. End devices

When reaching one of the end steps, the motor drive mechanism cannot continue its motion in this direction when fed with a new control impulse (“first electrical lock”).



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6.2.2.4. Protection for the direction of the revolution

In case, the phase sequence of the power supply is not observed, the KF relay does not close its contact and blocks the power supply of the operational circuit.

6.2.2.5. Restarting device

When restoring the supply voltage in cases of eventual power supply off during the switching operation, the motor drive mechanism is restarted in the same direction, in which it has been rotating and finishes its cycle.

6.2.2.6. Locking device for overload

When the working conditions of the transformer require such device, the circuit diagram provides stopping of the process of switching over of the OLTC. After normalizing the rate of the current, the motor drive completes the switching operation.

6.2.2.7. Locking devices for the control

When the operation conditions of the transformer require locking of the switching of the OLTC in certain conditions (for example: low temperature of the oil) locking of the control of the motor drive mechanism is possible.

6.2.2.8. Automatic passing through “dead” steps

It is performed without stopping and new command.

6.2.2.9. Protection from undesired serial switching operations

It is provided in cases, when, for some reason (welded contacts of the control contactor, skipping the normal position due to large inertia moments, wrong signal for “dead” step, and others) the motor drive mechanism does not stop in normal position after switching one step – its disconnects the power breaker QFM during breakdown. ATTENTION! The circuit diagram of the motor drive mechanism provides a self-check of the apparatuses. If any of the apparatuses shows a defect usually the breaker QFM switches off after setting in motion the motor drive mechanism in the area of the normal position!!

6.3. Terminal blocks

In the lower part of the protective cabinet of the motor drive mechanism the clients terminal blocks are situated.



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The terminal block Х1 is designed for power supplying the motor drive mechanism. From terminal block Х3 are coming the control signals and contacts, providing information for the working condition of the motor drive. From the terminal blocks ХЕ are coming different types of signals (in compliance with the requirements of the client) for the working position of the OLTC. The connection of the terminal blocks is done in compliance with the diagram in the pocket of the door of the motor drive mechanism.

7. Assembly of the motor drive mechanism to the transformer tank “DANGER” ! When fixing the motor drive mechanism to the transformer tank stress and bending of the protective cabinet is not allowed. Depending on the type of the connecting elements there are two possible variants: Variant I – protective pipes. In this variant inclination of the vertical shaft is not permitted. It is recommended as protection against frosting. Variant II – protective cap. In this variant the admissible inclination of the vertical shaft is 25 0. All overall and mounting dimensions of the motor drive mechanism, the bevel gear and the connecting elements are given in Enclosure МZ-4.4/07. By means of four openings the motor drive mechanism is mounted on the transformer tank. For decreasing the vibrations it is recommended placing leather or rubber pads. The fixing bolts should be secured against self-unscrewing.

8. Coupling of the motor drive mechanism to the OLTC “ATTENTION”! The motor drive mechanism should be fixed in a position corresponding to the position of the OLTC, and the motor drive mechanism OLTC should be in “normal position”.



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“DANGER”! Before starting the coupling procedure, check whether the protective circuit- breaker ( QFM ) of the motor is switched off, in order to avoid unexpected starting of the electric motor. The bolts of the bevel gear are released in such a way as to make it possible the gear to be lifted in order to be coupled with the vertical shaft. If protective pipes are used it is required that they enter telescopically one into another in order to provide access for mounting of the upper cardan coupler. For determining the correct coordination of the motor drive mechanism with the OLTC it is necessary to make several manual switching operations. The hand crank turns in direction “raise”. The revolutions of the hand crank counted from the moment of switching of the diverter switch of the OLTC until reaching “normal” position. Analogical counting is done in direction “lower” as well. The counted number of revolutions in both directions should be equal. The moment (number of revolutions) of the switching of the diverter switch for the whole range of regulation in both directions is checked and the results are compared with the recommended in the passport limits. If there is incompliance the following is done: - the upper cardan coupler of the vertical shaft is released, after which the hand crank is turned in direction, in which the greater number of revolutions have been counted until the outgoing shaft is turned to half of the difference of the revolutions counted in both directions. For example: - Additional movement of the vertical shaft (hand crank) when turning in direction “raise” – 4 revolutions; - Additional movement of the vertical shaft when turning in direction “lower” – 2 revolutions; Correction: (4 - 2) / 2 = 1 revolution in direction “raise”. After this adjustment has been made it is permitted switching over with the electrical motor. “Attention”! When the OLTC and the motor drive mechanism are delivered locked and sealed adjustment during coupling is not performed.



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9. Commissioning Before power supplying to the circuits of the motor, to the controlling and auxiliary circuits, it is checked whether the voltage, the current and the power of the supply correspond to the required values. It is obligatory that the phase sequence of the supply is checked.

9.1. Checking of step action

The switch S3 is turned to position “local”. A command impulse is given with the starting switch S”L-R” and is held in this position until the motor stops. The motor should switch off after the OLTC makes one changing over.

9.2. Functional check of the end breakers

The OLTC is brought to one of the end positions. When supplying a control impulse in the same direction, the motor drive mechanism should not react, while when supplying an impulse in the opposite direction, it should start. For the other end breaker the same procedure is repeated.

10. Technical maintenance The maintenance of the motor drive mechanism is performed by qualified personnel. The maintenance consists of periodical control of the action and condition of the following elements: “DANGER”! The control checks of elements under items 10.1, 10.2, 10.3, and 10.4 are performed when power supply voltage is available. All rules for safety at work should be observed!

10.1. Manual drive locking breaker Q3.

When placing the hand crank and mechanical coupling the power supply to the electric motor should be impossible.

10.2. Condition of the commutator

The correct contact of the contact elements and the action of the circuit breaker for “dead” positions are checked.



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10.3. End electrical and mechanical interlocks

The revolutions from the end “normal” position to its activation are counted and compared with the recommended in the passport norms.

10.4. Heating

The hygrostat is set to 35% humidity. For additional settings, follow the instructions below: The setting procedure can begin 20 seconds after the original feeding of electric power. Setting of threshold humidity level: Wait until you see on the display the percent humidity value measured at the moment. While the value is still on the screen, press the or button. After this, the figure 60.0 should start blinking. By pressing the and buttons, you can set the humidity level at the moment of switching to the desired value. If fast setting is necessary, press and hold the corresponding button ( or ); after 5 seconds, the

value starts changing more rapidly. In order to save your settings, press once.

10.5. Counter

Checked is the work by trial switching operations.

10.6. Controller S11/S12 (MZ-4.4/05)

In “normal” position the four contacts should be opened, and roll 50 to be in middle position. When turning disc 34 the corresponding two contacts should close, and at the end of the cycle roll 50 should return back in middle position.

10.7. Clearances

The shafts of the work positions indicator and the disc for “normal” position should have not any inadmissible side clearances.

10.8. Sealing of the door

The sealing of the door is checked for irregular deformations and if necessary the tightening handles are adjusted or the sealing is changed with a new one.



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10.9. Ventilation openings

Periodically the ventilation openings of the protective cabinet are checked and cleaned.

11. Special designs

For satisfying specific operating requirements the design can be modified as follows: - Level of protection of the protective cabinet ІР 65; - Locking of the protective cabinet with a padlock; - Coating of the protective cabinet ( RAL ) custom-made to client’s requirements; -Plate with openings and cable inlets (type and dimensions) custom-made to client’s requirements;

-Number of middle positions ( 1 ) and automatic passing through one or more positions. ENCLOSURES: Transmission and control gear МZ-4.4/02 Position transmitter МZ-4.4/03 Mechano-electrical control system МZ-4.4/04 Controller МZ-4.4/05 Motor drive mechanism МZ-4.4 – mounting and dimensions МZ-4.4/07 Limit switches SQ1/SQ2/SQ3 - working diagram МZ-4.4/08 Motor drive mechanism МZ-4.4 - mounting and dimensions МZ-4.4/10 Motor drive mechanism МZ-4.4 – general layout and components МZ-4.4/11 The motor drive mechanism design described in these instructions corresponds to the product at the moment of its issuing and can be changed without notice the clients

Documents

EA747e-MZ-4.4