Siemens 3AH4 Operating Instructions Manual

Vacuum circuit-breaker

Hide thumbs Also See for 3AH4:

Operating instructions manual (32 pages)

Operating instructions manual (66 pages)

Table Of Contents

Table of Contents

Quick Links

Download this manual

3AH4

Vacuum circuit-breaker

3AH41, 3AH42 and 3AH43

OPERATING INSTRUCTIONS

Order no.: 9229 9862 176 0E

Version: 11.2023 en

Table of Contents

Need help?

Do you have a question about the 3AH4 and is the answer not in the manual?

Questions and answers

Summary of Contents for Siemens 3AH4

Page 2: Service
Sections with the suffix (I) deal with the standard equipment. • Sections with the suffix (II) deal with the 3AH4 305-7/8 and 306-7/8 vacuum circuit-breakers. If no suffix is present, the information applies to all 3AH4 vacuum circuit-breakers. 9229 9862 176 0E...
Page 3: Table Of Contents
Contents Service ................................2 List of abbreviations ............................4 Other applicable supplements for Operating Instructions 9229 9862 ..............4 For your safety ..............................5 Signal terms and definitions ..........................5 Manufacturer's product liability ..........................6 General safety instructions ..........................6 Type approval according to the Radiation Protection Act (formerly German X-Ray Ordinance) ......
Page 4: List Of Abbreviations
List of abbreviations Closed-Open Deutsches Institut für Normung (German Institute for Standardisation) Europanorm (European standard) International Electrotechnical Commission MLFB Machine-readable manufacturer number Normally closed contact Normal Null (Sea level) Normally open contact Open Operating cycles Pole-centre distance RöV Röntgenverordung (German X-Ray Ordinance) Verband Deutscher Elektrotechniker (Association of German Electrical Engineers) Other applicable supplements for Operating Instructions 9229 9862 Order no.
Page 5: For Your Safety
For your safety For your safety The operating instructions are an integral part of the switching device and contain all the information for commissioning and use. The operating instructions must be read completely, the instructions contained must be followed and the warnings must be observed. Smooth and safe operation of this switching device requires proper transport and storage, professional installation and assembly, as well as careful operation and maintenance.
Page 6: Manufacturer's Product Liability
Product liability claims are upheld only if the replacement of the purchased spare parts is performed by personnel that have been trained and certified by Siemens. The manufacturer's product liability shall be excluded if at least one of the following criteria applies: •...
Page 7 For your safety Use of means of WARNING transportation Risk of injury due to wrong means of transportation! The use of incorrect means of transportation can lead to the vacuum circuit-breaker falling and cause injury to persons. • Observe weight. •...
Page 8: Type Approval According To The Radiation Protection Act (Formerly German X-Ray Ordinance)
For your safety Type approval according to the Radiation Protection Act (for- merly German X-Ray Ordinance) Parasitic X-ray emitters The vacuum interrupters installed in the switching devices are type-approved as par- asitic X-ray emitters according to Section 45 of the Radiation Protection Act of the Federal Republic of Germany and comply with the requirements for parasitic X-ray emitters according to Section 23 of the current Radiation Protection Ordinance up to the rated voltage defined in the approval certificate.
Page 9: Transport, Storage And Packing
Transport, storage and packing Transport, storage and packing Transport WARNING Unsuitable lifting gear! Incorrectly dimensioned fixing gear or incorrectly adjusted lifting gear may cause the transport unit to fall down. • Do not stand below suspended loads. • Select lifting gear, transportation and fixing gear according to the weight of the transport unit, including any packing, such as transport pallets.
Page 10: Taking Out Of (I) The Carton
Transport, storage and packing • Major damage must be documented photographically. • Ensure that any damage to the transport unit is confirmed by the transport com- pany in writing. Taking out of (I) the carton Work tools Required tools: Knife/scissors Lifting gear with lifting harness Pliers or lever CAUTION...
Page 11 Transport, storage and packing downs can occur. • Do not use the vacuum circuit-breaker. • Send it back in its original transport unit (see "Reusing the transport unit", page 16). Note Damage to the vacuum circuit-breaker from the use of incorrect lifting tackle! Carrying straps may scrape along the vacuum circuit-breaker and damage it.
Page 12 Transport, storage and packing Fig. 6 Removing the tensioning belts Fig. 7 Screw in eyebolts and raise the vacuum cir- cuit-breaker Transporting without a • Remove all tensioning belts and pieces of fastening wood. pallet • Remove material pack, if applicable. •...
Page 13: Taking Out Of (Ii) A Wooden Box
Transport, storage and packing • Attach further lifting tackle to the transport boreholes. • Transport to installation site or leave suspended from crane for further work steps. Taking out of (II) a wooden box Work tools Required tools: Screwdriver Knife/scissors Lifting gear with lifting harness Note Damaged components! In the case of damage, such as breaks, cracks, flaking,...
Page 14 Transport, storage and packing Fig. 12 Removing the supports Fig. 13 Removing the side panels • Undo all the screws in the side panels. • Take the supports out of the transport unit. • Remove the side panels. Fig. 14 Removing the accessories Fig.
Page 15 Transport, storage and packing Fig. 16 Preparing to lift Fig. 17 Lifting Transport to installation • Attach the crane hooks to the transport screws and the openings on the operat- site ing mechanism box. • Observe crane hook symbols. • Lift the vacuum circuit-breaker.
Page 16: Reusing The Transport Unit
• Screw down the wooden box again. • Before returning to the factory, ask the relevant Siemens representative for a product return number (see "Service" on page 2). • When returning a vacuum circuit-breaker, always specify the type and serial number (see "Nameplate"...
Page 17: General Information
Siemens (see “Maintenance and servicing” on page 51). Intended use 3AH4 vacuum circuit-breakers are suitable for switching any type of alternating cur- rent circuits under normal operating conditions, such as: • Three-phase motors for reversing, turning and direct operation •...
Page 18 General information Blank page 9229 9862 176 0E 2023-11-29...
Page 19: Description
Description Description Design Vacuum circuit-breaker The 3AH4 vacuum circuit-breaker consists of • the operating mechanism box (60.) • the pole assembly (19.), 3-pole version with vacuum interrupters (30.) • the cast resin post insulators (16.1 and 16.2) with reinforcing struts (28.) •...
Page 20 Description Pole assembly The pole assembly (19.) of the 3AH4 vacuum circuit-breaker consists of • the top vacuum interrupter carrier (20.) • with the top terminal (27.) • the vacuum interrupter (30.) • the bottom vacuum interrupter carrier (40.) with the bottom terminal (29.) and the clamp (29.2) with flexible lead (29.1)
Page 21 The operating mechanism box is closed with a removable cover (60.1). 600806 Kontr 60.1 Type 3AH425-4 No. S 3AH4/90004711 Year of manufact. 2009 kV, 50/60 Hz 2000 U /U 50/125 168 kg Rated operating sequence: O –...
Page 22 Description 68.7 600806 Kontr Type 3AH425-4 No. S 3AH4/90004711 Year of manufact. 2009 kV, 50/60 Hz 2000 U /U 50/125 168 kg Rated operating sequence: O – 0.3 s – CO – 3 min – CO Classification E2, C2, M2 according to IEC 62271-100:2017 Made in Germany 50.5...
Page 23 Terminal strip 24-pole (X1) Operations counter Manual opening and manual closing (mechanical) Additional equipment Each 3AH4 vacuum circuit-breaker can also be fitted with the following equipment: (Y2, Y3) Shunt release (with stored energy mechanism) 3AX1101-.. (Y4, Y5) Transformer-operated release 3AX1102-..
Page 24 Description Motor (M1) 3AY1511-.. After the supply voltage is applied, and if the closing spring is discharged, the motor starts immediately and is automatically deactivated internally once the spring is charged. During the short charging time, the motor sometimes op- erates in the overload range.
Page 25 Description Anti-pumping device (K1) 3AY1420-.. If simultaneous electrical CLOSE and OPEN commands are continuously applied to the vacuum circuit-breaker, it returns to the open position after being closed. The function of the anti-pumping device (K1) means that the vacuum circuit-breaker remains there until the ON command is re-entered.
Page 26 Description 1st shunt release (Y1) 3AY1510-.. In the case of the 1st shunt release Y1, the electrically fed tripping pulse is passed to the "OPEN" latch by means of a directly acting magnet armature, thus switch- ing off the vacuum circuit-breaker. The 1st shunt release Y1 is not designed for continuous operation and is automatically deactivated within the cir- cuit-breaker.
Page 27 Description Opening capacity AC 40 to 60 Hz Operating voltage Continuous current Operating voltage Continuous current U (V) I (A) U (V) I (A) Ohmic load Inductive load (T = 20 ms) up to 230 Fig. 30 Opening capacity of auxiliary switch 3SV92 Position switch 3AX4206-0A S21, S22 Position switches (switch off the motor after...
Page 28 Description Trip indicator, cutout switch (S6, S7) 3AX4206-.. The position switch S6 makes contact briefly when the vacuum circuit-breaker is opened by means of an elec- trical release. This contact can be used for a signal. In the event of intentional mechanical opening, the cut- out switch S7 interrupts the contact.
Page 29 Description A further shunt, transformer-operated, undervoltage or instantaneous release mech- anism can be installed as a 2nd release. 2nd shunt release (Y2) 3AX1101-.. The second shunt release Y2 is installed whenever more than one shunt release is needed. In this version, the electrical "open" command is passed by means of a magnet armature to the "OPEN"...
Page 30 Description Undervoltage release (Y7) 3AX1103-.. Note Damage due to missing or incorrect series resistor! Operation without a series resistor (R1) can cause damage. The undervoltage release (Y7) may only be operated with the supplied series resis- tor (R1). For circuits (mechanical or electrical), the undervoltage release 3AX1103-.. must be connected to control voltage, as otherwise closing is not possible (see "Removing the transport securing device from the undervoltage release", page 44).
Page 31 Description Heater (R01) for condensation water protection (optional) The heater minimises condensation and corrosion of the vacuum circuit-breaker. To this end, the heater has to be connected to the supply voltage (see circuit diagram included with the delivery). WARNING Danger of burns! Touching hot surfaces can cause burns.
Page 32: Interlocks
Description Interlocks To lock vacuum circuit-breakers as a function of the switching position, the stored energy spring mechanisms of the vacuum circuit-breaker can be fitted with an inter- lock. This also applies to vacuum circuit-breakers on carriages, on slide-in modules or with disconnectors.
Page 33 Description Electrical closing lock-out (-Y8E) 3AX1415-.. (optional, order suffix A47) Closing of the vacuum circuit-breaker can be prevented with the electrical closing lock-out (-Y8E). The electrical closing lock-out (-Y8E) enables operation of the vacuum circuit-breaker when an auxiliary voltage is available and mechanically locks both manual and electrical closing when an auxiliary voltage is not availa- ble (position switch -S5).
Page 34: Nameplate
Rated short-circuit duration t k Class E2, C2 and M2 as per 62271-100:2018-04 Mass m Made in Germany Rated operating sequence Classification of service life as per Fig. 42 Example – 3AH4 vacuum circuit-breaker nameplate standard Technical data Rated voltage* U 17.5 1250, 1250,...
Page 35: Ambient Conditions
Description Ambient conditions Vacuum circuit-breakers are suitable for use in the fol- lowing climate classes according to IEC 60721-3- +55 °C 3:2019: +131 °F Class • Climatic ambient conditions: 3K22 • Biological ambient conditions: -5 °C • Mechanical ambient conditions: 3M11 +23 °F •...
Page 36: Operating Times
Description Operating times Closing time (closed time) < 75 ms Opening time (tripping time) 1st shunt release (Y1) < 60 ms 2nd and 3rd release (Y2, Y4, Y6, Y7) < 55 ms Arcing time < 15 ms Break time 1st shunt release (Y1) <...
Page 37: Circuit Diagrams
Dimensions and weights The dimensions of the vacuum circuit-breaker can be taken from the relevant dimen- sional drawing. If needed, they can be obtained from your Siemens representative. The weight is indicated on the vacuum circuit-breaker nameplate (see Fig. 42), or can be seen on the associated dimensional drawing.
Page 38: Electrical Manual Closing And Electrical Closing
Description Electrical manual closing and electrical closing Extended auxiliary switch "OPEN" release 9862-73 Fig. 48 Example – circuit diagram with connection via low-voltage interface 64- pole Manual opening Position switch (opens when closing spring is charged) Manual closing S41, S42 Position switches (indicate charging state) Anti-pumping device S6, S7...
Page 39 Description The unassigned auxiliary switch terminals are wired up with the 64-pole plug bottom. Normal auxiliary switch Extended auxiliary switch 9862-75 No wiring required if 2nd shunt release Y2 present Undervoltage release Y7 present Fig. 49 Example - auxiliary switch terminals System wiring Tripping via Tripping via NO con-...
Page 40 Description 9229 9862 176 0E 2023-11-29...
Page 41: Installation
Check the data before installing the vacuum circuit-breaker in a panel (see “Com- missioning” on page 47) in order to avoid confusion. Installation position In internal spaces, the 3AH4 vacuum circuit-breaker on a slide-in module and as a fixed-mounted device can only be installed vertically. Fig. 51...
Page 42: Earthing
Installation Fig. 53 Fastening options Fig. 54 View Y and Z * Holes for M12 bolts Earthing Note If the vacuum circuit-breaker is installed in an earthed metal frame and is connected permanently and electrically conductive, no separate earthing is required. In this case, place contact washers (SN70093) under the screw heads when fasten- ing the vacuum circuit-breaker.
Page 43: Connecting Low Voltage
Installation Connecting low voltage Connect the customer-side low-voltage connection cables in the switchgear so as to ensure safe operation in accordance with the supplied circuit diagram. Removing and fitting the cover 60.2 60.1 10 Nm 60.1 60.2 Fig. 56 Removing the cover Fig.
Page 44 Installation Removing the transport securing device from the undervoltage release Undervoltage release (Y7) Vacuum circuit-breakers with a 3AX1103-.. undervoltage release (Y7) come with a present? transport securing device. • To remove the cover, see “Removing and fitting the cover” on page 43. •...
Page 45: Electrical Connection Of The Main Conductors
Installation Electrical connection of the main conductors Checking of the vacuum circuit-breaker in the panel with a high voltage applied is only permitted after full and proper functionality has been confirmed (see “Commis- sioning” on page 47). Preparing the contact surfaces Clean silver plated and copper plated connecting surfaces with a cloth;...
Page 46 Installation Fig. 62 Installing conductor bars (flat) Fig. 63 Installing conductor bars (flat) Corresponding to the rated current strength, use M12 screws and nuts – strength class 8.8 – and the appropriate spring elements and washers to connect the con- ductor bars.
Page 47: Operation
(mechanical and electri- cal). Electrically check the auxiliary switch S1 (68.) and the position switch (50.4.1) in both end positions – operate the 3AH4 vacuum circuit-breaker to do so. Check functioning of the closing solenoid Y9 (53.1) and all available shunt releases by operating them electrically.
Page 48: First Closing Operation
Operation Switching position indicator and spring state indicator when charging the closing spring, closing and opening Switching position indi- Input Spring state indicator cator with hand crank /   Charging with motor operat- ing mechanism CLOSE pushbut-   ...
Page 49: Opening
Operation Opening The opening spring (64.) is charged during the closing operation. To open, send the opening command by pressing the OPEN pushbutton (54.) or via the corresponding control element until the vacuum circuit-breaker is open and the OPEN switch position has been indicated and signalled. Change of the switching position indicator (59.) after electrical opening: ...
Page 50 Operation 50.1 50.1 50.5 50.6 Fig. 65 Charging the closing spring with the hand Fig. 66 Control elements and spring state indicator crank The adapter (50.6) of the hand crank (50.) is designed in such a way that the hand crank is uncoupled when the motor supply voltage returns.
Page 51: Maintenance
Maintenance Maintenance and servicing The 3AH4 vacuum circuit-breaker is maintenance-free for up to 15 000 operating cy- cles under normal service conditions (up to the rated current). However, we recom- mend regular visual inspections in line with the ambient conditions.
Page 52: Maintenance Plan
“Ser- vice life of the vacuum inter- rupters”, Note 3) Only for 3AH4305-7/8, 3AH4306-7/8, maintenance in Siemens factory Replace spring guide and insulating Note 3) switching rod Angle lever Only for 3AH4305-6/7/8, 3AH4306-6/7/8,...
Page 53 3) On all the parts being replaced, the locking elements used must also be replaced (spring rings, SL retainers, cotter-pins etc.). Your Siemens representative stocks a range of locking elements. Order no. 3AY1550-1A 4) Position switches must only be fastened so tight that the tappet can be easily moved.
Page 54 Maintenance Lubricants are available from your local Siemens representative: Order no. Bearing points and sliding surfaces: 180 g Isoflex Topas L 32 3AX11 33-3H 1 kg Isoflex Topas L 32 3AX11 33-3E Bearing points inaccessible for grease: 1 kg Shell Tellus oil 32 (special oil) 3AX11 33-2D For maintenance with lubricants, remove the cover.
Page 55: Overview Of Lubrication Points
Maintenance Overview of lubrication points Fig. 68 Bearing points and sliding surfaces in the operating mechanism  Isoflex Topas L 32  Shell Tellus oil 32 End face of the lever for the sensing device actuation (see Spring eyelet of the closing spring at the bottom (see Fig. 78) Fig.
Page 56 Maintenance See the following individual representations for details. 9229 9862 176 0E 2023-11-29...
Page 57 Maintenance Lubrication points with Isoflex Topas L 32 ∆ ∆ ∆ Fig. 69 End face of the lever (a) and crankpin (b) for Fig. 70 Spherical seat (c) of the spring guide of the operation of the spring state indicator and the opening spring sensing devices ∆...
Page 58 Maintenance ∆ ∆ Fig. 73 Bolt caps of the rapid release (g), slightly push Fig. 74 Deflection of the auxiliary switch (h) accessi- away the lever with the spacer bolts ble through the lower lateral hole of the oper- ating mechanism box ∆...
Page 59 Maintenance ∆ Fig. 77 Stop plate and end faces of the lever of the coupling rod (l) Lubrication points with Shell Tellus oil 32 Fig. 78 Spring eyelet of the closing spring (r) at the Fig. 79 Spring eyelet of the closing spring (r) on the bottom crank arm 9229 9862 176 0E...
Page 60 Maintenance Fig. 80 Bearing bushings of the deflection lever (s) Fig. 81 Square end of the auxiliary switch (t) Fig. 82 Bearing bushings of the circuit-breaker shaft Fig. 83 Bolts and SL retainers of the three insulating (u) left/right on the side walls, interior and ex- connecting rods (v) terior 9229 9862 176 0E...
Page 61 Maintenance Fig. 84 Opening spring bearing (w) When disassembled, the points on the pole end can also be lubricated and oiled. v, x, y v, x, y Fig. 85 Bearing points and sliding surfaces of the pole end – seen from below ...
Page 62 Maintenance Special case: maintenance with the closing spring charged When the closing spring is charged, lubrication of the cam contour is easier. • Use appropriate measures to secure the pushbuttons CLOSE (53.) and OPEN (54.) to prevent them being pushed •...
Page 63: Service Life Of The Vacuum Interrupters
Accessories/spare parts Order number Comment Download also available from: Operating instructions 9229 9862 https://support.industry.siemens.com Hand crank for manual charging of the closing spring 3AX1530-4B Slip coupling Lubricant See “Maintenance plan” on page 54 Locking elements...
Page 64 If the packing is no longer needed, all of it can be recycled. Hazardous substances When delivered by Siemens, the product does not contain any hazardous substanc- es within the scope of the Hazardous Substances Ordinance applicable to the terri- tory of the Federal Republic of Germany.
Page 65: Index
Index Index – Accessories available to order ......63 Low-voltage interface (X0) ....22 Altitude correction factor ........35 Plug connector with sleeve housing 24-pole ... 23 Ambient conditions ..........35 Plug connector with sleeve housing 64-pole ... 23 Angle lever ............20 Terminal strip (X1) ...........
Page 66 Index Standards .............. 17 Strut ............... 19 Switching position indicator ........48 – Switching position indicator CLOSED-OPEN 21 Terminal strip ............28 Terminal strip (X1) ..........28 Transformer-operated release (Y4, Y5) ........... 23 (Y4) ..............22 (Y6) ..............29 (Y6) 0.1 Ws ............. 22 (Y6), 0.1 Ws ............
Page 67: Central Legend
Central legend Central legend Pole plate Closing spring 16.1 Top post insulator Circuit-breaker shaft 16.2 Bottom post insulator Opening spring Pole assembly, complete Closing damping Top interrupter carrier Auxiliary switch S1 (6NO+6NC) Upper terminal 68.0.1 Extended auxiliary switch S1 (12NO + 12NC) Strut 68.1...
Page 68 Published by Siemens AG Smart Infrastructure Electrification & Automation Schaltwerk Berlin Nonnendammallee 104 D - 13629 Berlin Germany...

This manual is also suitable for:

3ah41 3ah42 3ah43

Siemens 3AH4 Operating Instructions Manual

Quick Links

Need help?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Siemens 3AH4

Summary of Contents for Siemens 3AH4

This manual is also suitable for:

Table of Contents