3AH5 Vacuum Circuit-Breakers Medium-Voltage Equipment
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3AH5 Vacuum Circuit-Breakers Medium-Voltage Equipment

3AH5 Vacuum Circuit-Breakers · Siemens HG 11.05 · 2017

Contents 3AH5 Vacuum Circuit-Breakers Medium-Voltage Equipment Catalog HG 11.05 • 2017 Invalid: Catalog HG 11.05 • 2010 Construction and mode of operation 7 Maintenance-free design, ambient conditions, current carrying capacity and dielectric strength 9 Product range overview and basic equipment 10 Ordering data and configuration example 12 Selection of basic types, circuit-breakers 13 Selection of secondary equipment 15 Selection of additional equipment 20 Accessories and spare parts 21 Electrical data, dimensions, weights and dimension drawings 24 Operating times, short-circuit protection...

3AH5 Vacuum Circuit-Breakers · Siemens HG 11.05 · 2017

Description Contents Pole assemblies Operating mechanism Trip-free mechanism Maintenance-free design, ambient conditions, current carrying capacity and dielectric strength Product range overview and basic equipment Construction and mode of operation Industrial application: Refinery 3AH5 Vacuum Circuit-Breakers · Siemens HG 11.05 · 2017

Description General 3AH5 standard circuit-breaker from 12 to 36 kV – The Economical 1 3AH5 vacuum circuit-breakers control all switching duties in medium-voltage systems. They are applicable for operation of e.g. overhead lines, cables, transformers, generators, capacitors, filter circuits, motors and reactors. Here, small short-circuit ratings in distribution systems face high breaking currents in industrial systems. The 3AH5 vacuum circuit-breaker is a real all-round device in its field of application. With its compact dimensions, it fits in all customary switchgear types. The...

Construction and mode of operation The 3AH5 vacuum circuit-breaker consists of the pole assemblies (1) and the operating mechanism box (2). The pole assemblies are fixed to the operating mechanism box via post insulators (3). The switching movement is transferred by means of operating rods (4) and levers. Pole assemblies The pole assemblies consist of the vacuum interrupters (5) and the interrupter supports. The vacuum interrupters are air-insulated and freely accessible. This makes it possible to clean the insulating parts easily in adverse ambient conditions. The vacuum interrupter is...

Description Construction and mode of operation, standards Releases A release is a device which transfers electrical commands from an external source, such as a control room, to the latching mechanism of the vacuum circuit-breaker so that it can be opened or closed. Apart from the closing solenoid, the maximum possible equipment is one shunt release and another release to be selected at will. For release combinations, refer to page 15. • The closing solenoid unlatches the charged closing spring of the vacuum circuit-breaker, closing it by electrical means. It is suitable for DC or AC...

Description Maintenance-free design, ambient conditions, current carrying capacity and dielectric strength Maintenance-free design The 3AH5 vacuum circuit-breakers are maintenance-free: • nder normal ambient conditions according to IEC 62271-1 U (former IEC 60694). • Up to 10,000 operating cycles, –– no relubrication, no readjustment required –– nd within their tolerances, the characteristics are a i ndependent of the switching rate or of standing times without switching operations. Ambient conditions The vacuum circuit-breakers are designed for the normal o perating conditions defined in...

Description Product range overview and basic equipment Rated voltage Motor operating stored- ■ O ■ O ■ O - XX 4) - X X X O ■ Basic equipment X Optionally selectable basic equipment O Selectable additional equipment - Not available 1) With manual operating mechanism, always with hand crank 2) With anti-pumping device 3) From pole-centre distance > 210mm 4) Only with 64-pole plug

Ordering data and configuration example 12 Selection of basic types, circuit-breakers Voltage level 12 kV 13 Selection of secondary equipment Release combination 15 Operating voltage, closing solenoid 16 Operating voltage, 1st shunt release 16 Operating voltage, 2nd release 17 Counter and circuit-breaker tripping signal 18 Operating voltage for operating mechanism/ type of operating mechanism 18 Auxiliary switch, secondary connection, interlocking 19 Additional equipment Accessories and spare parts Rating plate Accessories catalog 3AH5 Vacuum Circuit-Breakers ■ Siemens HG 11.05 ■ 2017

Equipment Selection Order number structure and configuration example Order number structure Special versions («) The 3AH5 vacuum circuit-breakers consist of a primary and a secondary part. The relevant data make up the 16-digit order number. The primary part covers the main electrical data of the circuit-breaker poles. The secondary part covers the uxiliary devices which are necessary for operating and a c ontrolling the vacuum circuit-breaker. In case of special versions, “-Z” is added to the order number and a descriptive order code follows. If several special versions are required, the...

3AH5 Vacuum Circuit-Breakers ■ Siemens HG

Order codes Configuration example 3AH5 vacuum circuit-breaker Rated voltage Ur= 36 kV Rated short-circuit breaking current /sc = Rated normal current / = 2000 A Pole-centre distance = 350 mm Example for Order No.: |3AH5314-4 Order codes: 3AH5 Vacuum Circuit-Breakers ■ Siemens HG 11.05 ■ 2017

Equipment SelectionSelection of secondary equipment Position: 1 234567-89 10 11 12 Configuration example 3AH5 vacuum circuit-breaker (Ur = 36 kV, Jsc = 25 kA, Jr = 2000 A, pole-centre distance = 350 mm) 1st shunt release; c.t.-operated release with a rated normal current of 1.0 A Example for Order No.: Order codes: 3AH5 Vacuum Circuit-Breakers ■ Siemens HG 11.05 ■ 2017

• Manual spring-operat.mechan. generally without closing solenoid (A) With With With With With With With With With order code order code order code order code order code order code order code order code order code 11th position Operating voltage of the 1st shunt release 24 V DC 48 V DC 60 V DC 110 V DC 220 V DC 100 V AC 110 V AC 230 V AC With order code With order code With order code With order code With order code With order code With order code With order code With order code 1) The AC frequency 50 or 60 Hz is selected at the 16th position of the order number together with the language...