Medium Voltage Distribution VAH - Schneider Electric Voltage Distribution VAH Heavy-duty vacuum circuit-breaker 12 kV to 17.5 kV Operating Instructions Technical Instructions No. AGS

Medium Voltage Distribution

VAHHeavy-duty vacuum circuit-breaker 12 kV to 17.5 kV

Operating InstructionsTechnical InstructionsNo. AGS 531 271-01 Edition 03/06

www.schneider-electric.com

Schneider Electric 35, rue Joseph Monier CS 30323 92506 Rueil-Malmaison Cedex, France www.schneider-electric.com

Manufacturer: Schneider Electric Sachsenwerk GmbH

Service: Should you have any queries regarding our Service, please do not hesitate to contact: Schneider Electric Sachsenwerk GmbH

© Schneider Electric All rights for this Technical Manual reserved.Reproduction and distribution of this Technical Manual - completely or partially - to third parties is prohibited. Only reproduction of thisTechnical Manual in full is admissible subject to the written approval of Schneider Electric Energietechnik GmbH – Sachsenwerk Mittelspannung.Electronic copies, e.g. in pdf format or as a scanned version, have the status ”for information only”.The Technical Manuals which are exclusively valid are always supplied by the manufacturer together with the product in question.

VAH Content

1 Regulations and provisions �� 41.1 Remarks on these instructions......................................................... 41.2 Terms and symbols used ................................................................. 41.3 Use in the line with the intended purpose........................................ 41.4 Applied standards............................................................................. 51.5 Safety instructions ............................................................................ 51.6 Disposal after the end of service life................................................ 5

2 Technical Data �� 62.1 Type designation .............................................................................. 62.2 Control and actuation units .............................................................. 6

3 Overview of variants VAH�� 8

4 Commissioning, Storage and Transport�� 104.1 Delivery .......................................................................................... 104.2 Storage........................................................................................... 104.3 Transport of the circuit-breaker ...................................................... 10

5 Installation �� 115.1 Before installation........................................................................... 115.2 Fixing the circuit-breaker in place .................................................. 115.3 Fitting the partitions........................................................................ 125.4 Interlocking further units................................................................. 125.5 Connecting the busbars ................................................................. 125.6 Earth connection ............................................................................ 135.7 Connecting the control cables........................................................ 13

6 Commissioning �� 14

7 Operation �� 157.1 Operator interface and operating elements ................................... 157.2 Charging the energy storing device ............................................... 167.3 Switching operations ...................................................................... 167.4 Fan attachment .............................................................................. 17

8 Servicing �� 188.1 Servicing schedule ......................................................................... 188.2 Safety provisions ............................................................................ 188.3 Cleaning insulating components .................................................... 198.4 Corrosion protection ....................................................................... 208.5 Condensation ................................................................................. 208.6 Greasing the circuitbreaker pole and drive mechanisms .............. 208.7 Permissibele number of break operations ..................................... 23

9 Annex �� 249.1 Accessories .................................................................................... 249.2 Auxiliary products ........................................................................... 249.3 Screw couplings ............................................................................. 249.4 Treatment of firmly screw-connected contact surfaces.................. 25

VAH 531 271-01 3

VAH 1 Regulations and provisions

1�1 Remarks on these instructions These Operating Instructions describe transport, assembly, operation, handling and maintenance of vacuum circuit-breakers VAH.These Operating Instructions are an integral part of the product. It must be made available at any time to the persons who work on the circuitbreaker.If the switchgear is sold to new owners, they must receive this document along with the circuit-breaker.For installation and operation of the circuit-breaker, the following documents must be complied with:■ Purchase contract with the agreements on the configuration of the circuit-breaker and with the legal details ■ System Configuration for the circuit-breaker VAH ■ For installation and operation of the circuit-breaker the Operation Instructions of the relevant switchboard must be complied with. As our products are subject to continuous further development, we reserve the right to changes regarding standards, illustrations and technical data. All dimensions specified in this manual are in millimeters.

1�2 Terms and symbols used These Operating Instructions use certain symbols which warn about dangers or provide important information which must be observed to avoid danger to personnel and damage to equipment:

Warning!This symbol warns of dangerous electrical voltage�Contact with voltage may result in fatal injury !Warning!This symbol is used for instructions non-compliance with which may result in serious injury, death or serious material damage�Important:This symbol is used for information which is important to avoid damage.

1�3 Use in the line with the intended purpose Vacuum circuit-breakers VAH are exclusively intended as switching units in air-insulated me dium-voltage switchgear. They must only be used in the scope of the specified standards and the switchgear-specific technical data. Any other use constitutes improper use and may result in dangers and damage.

Disclaimer of liability The manufacturer shall not be held responsible for damage which occurs if ■ instructions in this manual are not complied with, ■ the circuit-breaker is not operated according to its intended use (see above), ■ the circuit-breaker is assembled, connected or operated improperly, ■ accessories or spare parts are used which have not been approved by the manufacturer, ■ the circuit-breaker is modified without the manufacturer's approval, or if inadmissible parts are attached.

1�4 Applied standards The three-pole vacuum circuit-breaker VAH ■ corresponds to the requirementsfor AC switchgear for voltages above 1 kV acc. to IEC 62271- 100; ■ complies, regarding its switching capacity and insulating level, with ANSI C37 (please enquire at the manufacturer's)

VAH 531 271-01 4

5

VAH

VAH 531 271-01

1 Regulations and provisions (contd.)

Type approval of vacuum interrupter chambers acc� to RöV The vacuum interrupter chambers have been approved by the X-Ray Ordinance (RöV) of the Federal Republic of Germany up to a maximum voltage amounting to the rated short-time power-frequency voltage (rated power frequency withstand voltage) defined by DIN VDE/IEC. Thus, they satisfy the conditions for operation exempt of approval up to the voltage in question according to the X-Ray Ordinance (RöV).

Environmental and operating conditions Circuit-breakers VAH may only be operated under normal operating conditions according to IEC 60694. Operation under conditions different from these is only admissible upon consultation with the manufacturer and obtainment of his approval.

Ambient conditions Temperature class: ”Minus 5 indoors" (optional "Minus 25 Indoors“) Ambient temperature min./max. -5 / 40 °C Average value over 24 hours (max.) 35 °C Maximum installation altitude above sea level (higher installation altitudes possible on request) 1000 m

1�5 Safety instructions The work described in these instructions may only be performed by specialist electricians who have proved their experience with the circuitbreaker VAH. ■ Adhere to the locally applicable accident prevention, operating and work instructions. ■ Installation: IEC 61936-1 / HD 637 S1 ■ Operation of electrical equipment: EN 50110-1 Read these instructions carefully before you work on the circuit-breaker, and perform the work according to the descriptions. Only perform such work if you have understood the instructions. Do not perform any work on the circuit-breaker which is not described here.

Warning! Before starting work on the circuit-breaker, deenergize the system, verify it for zero voltage and earth the system according to the applicable safety rules pursuant to EN50110-1� Warning! Before performing work on the circuit-breaker, switch off the supply voltage and prevent it from reclosing� Warning! Risk of injury due to the energy storing device� Before starting work, release the energy storing device via the operating sequence OFF-ON-OFF�

1�6 Disposal after the end of service life A manual on disposal after the end of the service life is available for disposal of the circuit-breaker VAH. Disposal at the end of service life is performed on request by the service center at the manufacturer's.

6

VAH

VAH 531 271-01

2 Technical Data

2�1 Type designation The type designation of the heavyduty vacuum circuit-breaker - cf. name plate - gives information about important technical data. The meaning of the type designation is explained below by means of an example:

Example VAH 12-63-31-27 Type VAH Rated voltage 12 kV Rated short time current (rated short-circuit breaking current)

63 kA

Rated current 3150 A Pole centre spacing (PCS) 275 mm

In case of queries and orders for spare parts, the following data on the rating plate must be specified: ■ Type designation ■ Factory number ■ Year of construction

2�2 Control and actuation units The drive is basically designed as well for manual tensioning of the energy-storing device (make spring). The drive may be equipped with further control and actuation units. ■ Push switch S21 - S25

□ actuated by the energy-storing device ■ Auxiliary switches S1

□ are actuated by the switch shaft. The switching positions of the switch elements are dependent on the switch status "Make" and "Break" of the circuit-breaker. □ 12 / 16 /20 pole versions may be supplied. □ They are set in compliance with the wiring diagram. Cf. Fig. 2 regarding other settings.

A number of switch elements are reserved for internal breaker-control. ■ Shunt opening releases F11-F12 ■ Shunt closing release F2 ■ Push switches S41 - S43

□ S41 and S42 actuated by the button "Make" and "Break" □ S43 actuated by the button "Break"

■ Motor M1 □ for tensioning the energy-storing device (closing spring)

Information about the power consumption of coils and the motor is available from the manufacturer. To this effect, the auxiliary voltage data is required.

Power consumption of magnet coils and motor: Magnet coils Power consumption [W] Shunt closing release 160 Shunt opening release ca. 50 Under-voltage release without time delay 15

CT powered release 12 Blocking magnet 12 Motor 200-250 Motor tensioning time ≤12s

Name plate 1 Type designation 2 Factory number 3 Year of construction

1, 2 3

4

7

VAH

VAH 531 271-01

Fig. 1 Setting the cams of the auxiliary switch

2 Technical Data (contd.)

Auxiliary switches The switching functions are set in the factory in accordance with the LV wiring drawings. Other functions of the auxiliary switch may be set by means of adjustable cams.

Setting procedure: ■ Set circuit-breaker to "Break"; energy-storing device detensioned. ■ Remove cover plate (loosen five screws). ■ Set desired switch function. ■ Latch cam in the driver again. ■ Check whether or not the cam has latched in the changed position. ■ Replace cover plate on completion of settings.

Technical Data

Rated supply voltage

VDC VAC 24 48 60 110 220 120 230

Switching capacity [A] 8 4 3 2 1 10 10

Short-circuit level 100 A for a time period of 30 ms

Time constant T=L/R [ms] ≤20 -

Rated continuous current [A] 10 -

Circuit-breaker Break Make

Auxiliary switchmade

Advanced break contact

Delayedmake contact

Advanced make contact

Delayedbreak contact

Wiper

Position of cams for setting procedure circuit-breaker "Break" Rotation for setting procedure circuit-breaker ”Make”: counter clockwise

Fig. 2 Possible switching functions of auxiliary switch (switching programm)

Cam

Viewing direction for setting

VAH 3 Overview of variants VAH

Fig. 3 Fig. 4 Heavy-duty vacuum circuit-breaker VAH, ≤ 1250 A Heavy-duty vacuum circuit-breaker VAH, ≤ 1250 A on

transport cassette

Fig. 5 Fig. 6 Heavy-duty vacuum circuit-breaker VAH, ≤ 4000 A Heavy-duty vacuum circuit-breaker VAH,

≤ 4000 A on transport cassette

8 VAH 531 271-01

VAH 3 Overview of variants VAH (contd.)

854

673 275 275

1816

501

Fig. 7Heavy-duty vacuum circuit-breaker VAH, ≤ 8000 A with fan attachment

9VAH 531 271-01

VAH 4 Commissioning, Storage and Transport

4�1 Delivery ■ Handle shipping units carefully when unloading and unpacking them ■ Shipping units must be unpacked immediately after receipt. The insurance company must be notified immediately about any damage occurred in transit ■ On delivery, the consignment must be checked for completeness. The manufacturer must be notified in writing about any discrepancies.

min.

0,5

m

Fig. 8 Transport

4�2 Storage The transport packaging is not intended for storage. The risk of storing the parts in packed condition shall be the consignee's responsibility!

4�3 Transport of the circuit-breaker ■ Transport using a forklift truck: Only transport the circuit-breaker on a pallet. ■ Transport without pallet:

□ on transport cassette according to Fig. 4, 6. □ The circuit-breaker is lifted as shown in the drawing on the right. To this effect, a crane mounting harness is required.

Warning!Make sure the crane mounting harness is strong enough to bear the weight of the circuit-breaker!

Weights Rated current [A] ≤ 1250 ≤ 4000 Weight * (kg) 200 200

* The weights of the vacuum circuit-breaker VAH are approximate and include neither packing nor transport cassette.

VAH 531 271-01 10

11

VAH

VAH 531 271-01

5 Installation

5�1 Before installation ■ Dimensional drawings are supplied on request. ■ Check the technical data on the name plate. ■ Check auxiliary voltage of the incorporated control and actua - tion units.

The circuit-breaker is delivered in the position "Broken" and energy-storing device "detensioned".

Warning! Do not tension the energy-storing device before completing installation� Danger of injuries� Warning! Comply with the safety provisions in section 1�5!

5�2 Fixing the circuitbreaker in place ■ Switching devices for direct attachment:

□ Fastening points are provided at the ends of the insulator supports with predefined hole positions (Fig. 9). □ In the event of an installation position (service position) differing from the standard, harmonise installation position with the manufacturer. □ The circuit-breaker must not be distorted by the fastening. □ Screws and fitting parts are not supplied with the breaker

Important: Comply with the tightening torques specified for screwfastening (refer to Annex).

The circuit-breakers are supplied with fitted crane hooks.

Important: After attachment the crane hooks must be removed.

■ Switching devices on transport cassette □ Four drilled holes diam. 18 mm each are provided in the transport cas sette for fastening on the floor or on rails.

378

40

140

max.10

max

.70

max

.70

max.30M10

max.20

max.30

Fig. 9 Examples for fixing

Fig. 10 Crane hooks (remove after fitting the breaker)

100

570

1

Fig. 11 1 Fastening points in the transport cassette

VAH 5 Installation (contd.)

1

2

M10 M10

Fig. 12 Attachment of partitions 1 Bracket 2 Plastic disk

5�3 Fitting the partitions ■ Fit two brackets on the supporting plate (centre switch pole) using 2 x M10 plastic screws. ■ Screw partitions onto brackets using 2 x M10 plastic screws. ■ In the case of double partitions, screw on 2nd partition at four places using plastic disc spacers.

Important: Comply with the tightening torques specified for screwfastening (refer to Annex)

5�4 Interlocking further units If, dependent on the position of the circuit-breaker, other devices shall be interlocked or controlled, it must be borne in mind that the masses and forces acting for interlocking purposes do not influence the switching behaviour of the circuitbreaker. Please consult manufacturer.

5�5 Connecting the busbars Connection surfaces are surfaces for the passage of current. Material of the connection surfaces on the heavy-duty circuit-breaker: silver-plated copper.

Warning! Aluminium busbars must never be connected to silver-plated connection surfaces of the heavyduty vacuum circuit-breaker� Inadmissible matching of materials�

■ Take into consideration DIN 43 671 as regards the rating of continuous current. Operators outside Germany should apply the relevant local regulations. ■ Maximum spacing from the nearest support point of the connections of the circuit-breaker towards the switch pole axis:

□ at rated short-circuit breaking current 50 kA = 825 mm (3 x pole centre spacing). □ at rated short-circuit breaking current 63 kA = 500 mm.

If the nearest supporting point is not situated in the direction of the breaker pole axis, care must be taken that no higher current forces act on the circuit-breaker switch pole.

Important: Coat contact surfaces (refer to Annex).

■ Make busbar bolt and screw connections in compliance with DIN 43 673.

The heavy-duty vacuum circuitbreaker must not be distorted by screwing on the busbars.


VAH 531 271-01 12

VAH 5 Installation (contd.)

Busbar cross-sections for connection to the heavy-duty 1

1 vacuum circuit-breaker VAH Minimum busbar Rated current [A] cross-section [mm2] Material

≤ 4000 Connection as DIN 43 671 Copper > 4000 4000 Copper

1 1

5000 - 8000 * 8000 Copper

Fig. 13 * with ventilator set 1 Busbar connection

5�6 Earth connection Drive cabinet

(Connect station earth to the earth connection of the circuit-breaker.)

■ Choose cross-section and material of the earth conductor in compliance with DIN VDE 0141 or national installation specification.

M1295 115 Important:

Fig. 14 Coat contact surfaces (refer to Annex). Earth connection on heavy-duty vacuum circuit-breaker (steel) ■ Protective earthing may also be established through the fastening

screws in the profile of the rear plates of the drive cabinet if galvanised ratchet screws are used as fastening screws whose ratchet penetrates the varnish. Admissible thermally active shorttime current per ratchet screw M12: 4 kA

500 (1 s); 2.7 kA (3 s)

■ Screw connections M12.

M12

Important: Comply with the tightening torques specified for screwfastening

Fig. 15 (refer to Annex). Earth connection on transport cassette (steel)

5�7 Connecting the control cables Connection by means of (Fig. 16): ■ plug or

1 ■ terminal strip in the drive cabinet

On connection by terminal strip 2

■ deinstall cover plate (five screws). ■ connect the external control cables through the terminal strip and lay them to the outside through the opening in the drive cabinet.

The following may be connected: ■ flexible wires up to 1.5 mm2 (only on connection by plug) ■ solid single wires up to 2.5 mm2

Fig. 16 External control cables 1 Opening for control and auxiliary cables The binding wiring diagram is situated as adhesive circuit diagram on the 2 Plug alternatively inner side of the cover plate.

■ If additional control cables are installed in the drive cabinet, sufficient spacing to moving parts of the drive must be provided. ■ Reinstall cover plate after the external control cables have been connected.


13VAH 531 271-01

VAH 6 Commissioning

■ Check circuit-breaker for external damage. ■ Make sure that there are no external parts in the circuit-breaker compartment. ■ Check surface of insulating compo nents for impurities. If necessary, clean, as described in section 8. ■ Check installation work

□ Check securing bolts. □ Check the conductor bars' screw couplings using a torque wrench. □ Check the screw coupling of the earth terminal.

Perform functional tests: Important: Observe the operating and locking conditions acc. to Chapter 7.

Important: Undervoltage releases and blocking coils (both optional) only enable switching tests to be performed with the auxiliary voltage applied.

■ Charge energy-storing device using the crank. Check the spring position indicator. ■ Switch circuit-breaker on and off several times by hand. Check position indicator. ■ Check electrical functions of control and operating devices.

Important: The energy storing device of motorized circuit-breakers is charged automatically as soon as the motor's auxiliary supply is applied.

Apply auxiliary voltage

Perform switching operations and check for proper working order and the function of the interlocks by actuating the shunt release. Watch position indicator.

■ Check interlocks between circuitbreaker and other devices.

Additional measures to be taken in case of circuit-breakers with fan module: ■ Check making and breaking threshold for the compact fans (see section 7.4) ■ Perform a functional check for the fans and air flow monitors

Important: Comply with separate documentation for the control systems!

VAH 531 271-01 14

VAH 7 Operation

7�1 Operator interface and operating elements

U I U I f k

Position indicator ON/OFF

Operations counter

ON button

OFF button

Position indicator, energy-storing devicecharged/released

Name plate

Opening for crankto charge the

energy-storing device

Fig. 17Operating elements

Position indicators on circuit-breaker and possible operating sequences

Pos� Position indicator Position indicator Opening spring Possible operating sequence

Energy-storing device (closing spring)

ON/OFF ("CLOSE/TRIP")Switch position

1 released OFF released none

2 charged OFF released, is charged via C C O

3 released ON charged O

4 charged ON charged,is charged via C O C O

C = Closing (ON) O = Opening (OFF)

VAH 531 271-01 15

VAH 7 Operation (contd.)

Fig. 18 Charging the energy-storing device manually

approx. 30 turns clockwise

Insert crank 7�2 Charging the energy storing device Manually Initial position: ■ Circuit-breaker in "OFF" position. ■ Energy storing device "released" (Table, section 7.1, item 1)

Move circuit-breaker in "ready-forclosing" position

■ Insert crank into opening for charging the energy storing device. ■ Perform approx. 35 turns (clockwise) until position indicator "charged"

appears (starting the motor during this procedure does not involve a

danger). (Table, section 7.1, item 2) ■ After charging, remove the crank. The circuit-breaker is ready for closing.

Via motor The energy storing device of moto - rized circuit-breakers is charged automatically as soon as the motor's auxiliary voltage is applied.

7�3 Switching operations Important: The specific interlocks between the circuit-breaker and the panel must be taken into account.

Closing (ON)

■ Push button "ON" - or

■ apply voltage to shunt closing release.

The position indicator shows the switch position "ON" (Table, section 7.1, item 3).

The position of the auxiliary switch has changed.

The energy storing device can be charged immediately after switching ON (by hand or by motor). If voltage is applied to the motor, charging is performed automatically. (Table, section 7.1, item 4)

Opening (OFF)

■ Push button "OFF" - or

■ switch off via shunt opening release, undervoltage release or secondary coil.The position indicator shows the switch position "OFF" (Table, section 7.1, item 1 or 2).

The position of the auxiliary switch has changed.

VAH 531 271-01 16

VAH 7 Operation (contd.)

7�4 Fan attachment Fan modules are attached depending on the rated current Ir and the conductor bar terminal cross section (see also ”System Configurations“ ́ for the VAH circuit-breaker). The fans are located above the switch poles and blow air onto the heat sink. The system is equipped with compact fans, each equipped with an axial fan and guard screen.The fans are designed for min. 20,000 service hours under normal operating conditions (see sect. 1.4), and do not require any maintenance.

Fan operation: The fan does not start turning until the prevailing normal current has exceeded an adjustable threshold. Compact fan (Papst, 5656 S; 30 W power): ON threshold: 4700 A OFF threshold: 4500 A

Compact fan (ebm; W2E 200-HH 38-01; 80 W power): ON threshold: 4800 A OFF threshold: 4600 A

Air flow monitor: To ensure the required cooling effect, the fans are monitored by air flow monitors. These are located below the fans’ blow-out opening. If there is no air flow due to failure of a fan, the air flow monitor issues a signal.

Measures in case of failure of a fan: ■ Reduction of the maximum ope - rating current to the appropriate fan ON threshold of the switching unit. ■ Contact the manufacturer’s Service Center.

4

1

2

3

Fig. 19 Heavy-duty vacuum switch VAH with fan module 1 Compact fan (shown: “ebm; W2E 200-HH 38-01“) 2 Air flow monitor 3 Connector terminal (24 poles) 4 Direction of air flow

17VAH 531 271-01

18

VAH

VAH 531 271-01

8 Servicing

8�1 Servicing schedule A regular inspection of the vacuum circuit-breaker VAH depending on the stress imposed during operation and on the operating condi tions is recommended. The operator should check the oper - ating conditions at intervals, which he decides in compliance with his own experience, at least however by inspecting the insulating parts for contamination (e.g. dust).

Important: The company operating the circuit-breaker is responsible for complying with the specified maintenance intervals and for per forming maintenance according to the actual operating and ambient conditions.

In case of doubt or if deviations from the circuit-breaker's proper working order are detected, the manufacturer should be contacted.

Servicing schedule

8�2 Safety provisions Maintenance work must be perform - ed only by qualified persons, who have had experience with circuitbreakers VAH and their drive.

Warning!Comply with the safety provisions in section 1�5!

Warning!The circuit-breaker must not be disassembled for maintenance work! “Use in line with the intended purpose” jeopardised (see section 1�3)�

Safety precautions: ■ On principle, the 5 safety rules applicable for electrical engineering must be complied with before maintenance work on the circuitbreaker is started. These rules apply for all live parts:

□ Isolating from the power supply □ Securing from reclosing □ Ensuring zero voltage

Maintenance intervals (ambient conditions in accordance with IEC 60 694)

Maintenance work Qualification / positionperforming the work

Every 4 years

■ Check for contamination /condensation and damage. ■ If necessary, clean circuitbreaker (see section 8.3) and perform several switching tests

Staff qualified accordingly for the work to be done

After 20 years

■ Clean and grease circuit breaker (see section 8.3 and 8.6) ■ Perform several switching tests


After 10,000 operating cycles

Grease circuit-breaker (see section 8.6)


After 30,000 operating cycles

Replace circuit-breaker drive mechanism

Manufacturer’s Service Center

Once the permissible number of break operations has been reached (see section 8.7)

Replace circuit-breaker pole

Manufacturer’s Service Center

VAH 8 Servicing (contd.)

□ Earthing and short-circuiting □ Covering or cordoning off adjacent live components.

■ Switch off the auxiliary voltage for the circuit-breaker drive and secure it against reclosing. ■ Release the energy-storing device by performing the corresponding operating sequence on the circuitbreaker: ON - OFF - ON (see section 7).

8�3 Cleaning insulating components To secure the specified insulating level, the insulators must be clean. The following parts must be cleaned: ■ post insulators ■ operating rods ■ connection plates ■ ceramic of the vacuum switching chambers ■ partitions Moreover, general cleanliness of the circuit-breaker and of its external parts should be ensured.

Use a dry cleaning cloth in case of slight soiling: Clean by means of a dry, lint-free cloth. Depending on quantity of dirt collected, replace cloth as often as necessary.

Use cleaning agents in case of severe soiling: Cleaning agent 1 liter can, order number: S 008152 The use of other cleaning agents is not admissible. ■ Wear protective gloves ■ Use the cleaning agent according to the manufacturer’s instructions ■ Soak the cloth thoroughly and wipe the insulating components. Keep duration of contact as short as possible. ■ Expose the cleaned surface to the air for at least 2 hours.

Insulating components which must be cleaned at regular intervals

Fig. 20 VAH circuit-breaker

19VAH 531 271-01

VAH

Fig. 21 Circuit-breaker pole VAH 1250 A / 2500 A / 3150 A, lower section, lubrication points

8 Servicing (contd.)

8�4 Corrosion protection Drive mechanisms and covers have a long-term protection against corrosion. Any damage to the paint, scratches and other damage must be remedied immediately to avoid corrosion. Contact the manufacturer’s Service Center.

8�5 Condensation To ensure the specified insulating level, the VAH circuit-breaker – especially its insulating components must not be exposed to condensation.

Measures to take in case of condensation: ■ If condensation of the circuitbreaker is detected, the switching device must be cleaned according to section 8.3. ■ Installation or inspection of the appropriate heating. It must pro - vide a sufficient heating performance to prevent condensation on the circuit-breaker.

8�6 Greasing the circuitbreaker pole and drive mechanisms

Important: The bearings and joints must not be flushed out with the cleaning agent.

Switch poles

Liquid lubricant FL on bearings, articulated joints and guides.

Apply liquid lubricant in drops (oil can, drip-feed oiler) in the bearing gap. Through capillary action the liquid lubricant runs between the bearing surfaces. Use extension pipe or spray at inaccessible lubrication points.

Fig. 22 Circuit-breaker pole VAH 4000 A / 8000 A, lower section, lubrication points

VAH 531 271-01 20


Removing the operating panel: Tool: TORX screwdriver, size T25 / slotted screwdriver Remove the 5 x M5 screws on the front and remove the operating panel. Put operating panel and screws in a safe place for subsequent reassembly. Once lubrication of the drive mechanism is complete: ■ Put the operating panel back on. Tightening torque for the securing bolts: 3.8 - 5.6 Nm. ■ Put circuit-breaker into operation again according to section 6 “Commissioning”.

Fig. 23 Frontplate of VAH circuit-breaker 1 Securing bolts

Lubricating the drive:

Fig. 24Lubrication points in the drive (overview drawing see next page)

VAH 531 271-01 21


Lubrication procedure Contact lubricant KL on sliding surfaces, Order no. ST 312-111-835.

Clean lubrication points, e.g. with a non-fluffy cotton cloth or soft brush and detergent (use little, moisten only lubrication points). Apply a thin film of lubricant KL.

Liquid lubricant FL on bearings, articulated joints and guides, Order no. S 008 153.

Apply the liquid lubricant in drops (oil can, drip-feed lubricator) in the bearing gap. The liquid lubricant runs between the bearing surfaces through capillary action. Use extension pipe or spray at inaccessible points.

Do not lubricate: ■ charging gears ■ motor ■ ball-bearings and sliding bearings ■ auxiliary make release ■ auxiliary Break release ■ push switch Make-Break ■ push switch "Energy-storing device" ■ auxiliary switches ■ tappets of all release coils

11 10

1

2

9

8

3

7

6

4 5

Fig. 25 Lubrication points in the drive

22 VAH 531 271-01


8�7 Permissibele number of break operations The diagram defines the permissible number of break operations. They indicate whether the vacuum interrupter chambers need to be replaced.

30 000

10 0005000

1000500

10050

10Ir ISC

Breaking current log Ia

Ir = Rated current [A]Isc = Rated short-circuit breaking current [kA]

Important: The data for the rated current and rated shortcircuit breaking current are indicated on the rating plate.

Important: Due to the further development and operating experience regarding vacuum interrupter chambers, contact erosion inspection is no longer accounted for.

No.

of

brea

king

ope

ratio

ns n

Fig. 26 Name plate

VAH 531 271-01 23

VAH 9 Annex

9�1 Accessories

Designation Order no� Manual crank AGS 617 810-01

9�2 Auxiliary products The auxiliary products are available from Schneider Electric Sachsenwerk GmbH.

Designation Order no� Lubricant KL 0.5 kg can Liquid lubricant FL 0.5 kg can S 008153 Cleaning agent 1l can S 008152

ST 312-111-835

The use of other auxiliary products is not admissible.

9�3 Screw couplings The following elements must be used for all metal screw couplings: ■ Screws and bolts: Grade ≥ 8.8, ■ Nuts: Grade 8.

Thread size Tightening torque [Nm] min� max�

M6 7 9 M8 16 24

M10 36 44 M12 63 77 M16 153 187

Table 1:Bolts and nuts without ratchet toothing (except slotted screws).


M6 12.5 15.5 M8 32 40

M10 65 79 M12 90 110 M16 243 297

Table 2:Bolts and nuts with ratchet toothing.

VAH 531 271-01 24

VAH 9 Annex (contd.)


M6 0.7 0.9 M8 1.5 2 M10 3 3.9 M12 5.1 6.7 M14 7.6 9.9 M16 10.2 13.2

Table 3: Plastic screws and nuts (Partition attachment). No preliminary treatment of the thread


M6 5.5 7.5 M8 15 19

M10 30 40 M12 60 76

Table 4: Screw coupling between switching device and conductor bar with conductor material copper

9.4 Treatment of firmly screw-connected contact surfaces Contact surfaces must be subjected to preliminary treatment before screw-fastening.

Material of contact surfaces

Pretreatment

Copper,or copper silver-plated

Copper or copper alloy

Steel or (1) galvanized steel

(1) (4)

(1) (2) (4) (1) (3) (4)

(1) Clean ■ use a lint-free cloth, ■ in case of severe contamination: use detergent. (2) Polish to achieve a bright surface ■ use emery cloth (grain size 100 or finer) or ■ use a steel brush which is only used for copper (3) Polish to achieve a bright surface, remove any existing passivation ■ with an emery cloth (grain size 100 or finer) ■ using a steel brush which is only used for steel. (4) Treat with lubricant KL Coat both contact surfaces with lubricant KL so that the space between the contact surfaces is completely filled once the screws have been fastened.

VAH 531 271-01 25

Appendices Notes

VAH 531 271-0126

Appendices Notes

VAH 531 271-01 27

© 2

011

Sch

neid

er E

lect

ric -

All

right

s re

serv

ed

Schneider Electric As standards, specifications and designs change from time to time, please ask for 35, rue Joseph Monier confirmation of the information given in this publication. CS 30323 This document has been printed 92506 Rueil-Malmaison Cedex, France on ecological paper

RCS Nanterre 954 503 439 Publishing: Schneider Electric Capital social 896 313 776 € Design: Schneider Electric www.schneider-electric.com Printing:

VAH 531 271-01 02-2011

Documents

Medium Voltage Distribution VAH - Schneider Electric Voltage Distribution VAH Heavy-duty vacuum circuit-breaker 12 kV to 17.5 kV Operating Instructions Technical Instructions No. AGS