3AH47 Vacuum Circuit-Breakers for Traction Applications Medium-Voltage Equipment

3AH47 Vacuum Circuit-Breakers · Siemens HG 11.52 · 2017

3AH47 Vacuum Circuit-Breakers Medium-Voltage Equipment Catalog HG 11.52 • 2017 Construction and mode of operation 7 Maintenance, ambient conditions, current carrying capacity and dielectric strength 9 Product range overview and basic equipment 10 Order number structure 12 Selection of basic types, circuit-breakers 13 Selection of secondary equipment 15 Selection of additional equipment 22 Accessories and spare parts 24 Electrical data, dimensions, weights and dimension drawings 28 Operating times, short-circuit protection of motors, consumption data of releases 35 Annex Inquiry form Configuration...

3AH47 Vacuum Circuit-Breakers · Siemens HG 11.52 · 2017

Description Contents Pole assembly Operating mechanism Trip-free mechanism Circuit-breaker tripping signal Railway control center Switching medium Maintenance, ambient conditions, current carrying capacity, dielectric strength Construction and mode of operation Product range overview and basic equipment 3AH47 Vacuum Circuit-Breakers · Siemens HG 11.52 · 2017

Description General 3AH47 circuit-breaker – The Special for railway electrification applications at 17.5 kV and 27.5 kV The electrical power supply for railway systems requires circuit-breakers with special features. Not only are there single-pole circuit-breakers in normal operation, but also the high requirements regarding operational reliability and number of operating cycles reach far beyond the standards of other applications. The vacuum circuit-breaker series 3AH47 offers – both for 16.7 Hz at a rated voltage of 17.5 kV, for 25 Hz at a rated voltage of 25 kV and for 50 / 60 Hz at a rated...

Description Construction and mode of operation The 3AH47 vacuum circuit-breaker consists of the pole a ssembly (1) and the operating mechanism box (2). The pole assembly is fixed to the operating mechanism box via post insulators (3). The switching movement is transferred by m eans of operating rods (4) and levers. The vacuum switching technology, proven and fully d eveloped for more than 40 years, serves as arc-quenching principle by using vacuum interrupters. 1 Pole assembly 2 Operating mechanism box 3 Post insulator Switching medium Pole assembly A pole assembly consists of the vacuum interrupter...

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 l tching mechanism of the vacuum circuit-breaker so that a it can be opened or closed. How many releases are used and how they are combined is defined when the secondary equipment is selected. Circuit-breaker tripping signal The NO contact makes brief contact while the vacuum c ircuit-breaker is opening, and this is often used to operate a hazard-warning system which, however, is only allowed to respond to automatic...

Description Maintenance, ambient conditions, current carrying capacity and dielectric strength Maintenance The 3AH47 vacuum circuit-breakers are maintenance-free up to 10,000 operating cycles under normal ambient conditions according to IEC 62271-1. After that, maintenance is to be effected according to the maintenance schedule, e.g. r elubrication every 10,000 operating cycles, and replacement of the vacuum interrupters every 30,000 operating cycles. Ambient conditions The vacuum circuit-breakers are designed for the normal o perating conditions defined in IEC 62271-100. Current carrying capacity...

* Other ratings on request ■ Available design Anti-pumping Available None Circuit-breaker tripping signal Operations counter Available None Interlocking Without Mechanical interlocking 3AH47 Vacuum Circuit-Breakers ■ Siemens HG 11.52 ■ 2017

Order number structure 12 Selection of basic types, circuit-breakers Voltage level 17.5 kV; 16.7 Hz, single-pole 13 Voltage level 25 kV; 25 Hz, single-pole Voltage level 25 kV; 25 Hz, two-pole 13 Voltage level 27.5 kV; 50/60 Hz, single-pole Voltage level 27.5 kV; 50/60 Hz, two-pole 14 Selection of secondary equipment Release combination 15 Operating voltage, closing solenoid 15 Operating voltage, 1st shunt release 16 Operating voltage, 2nd release 17 Operating voltage, 3rd release 18 Operating voltage of the drive motor 19 Auxiliary switch, low-voltage interface, interlocking 20 Selection of...

Equipment Selection Order number structure and configuration example Order number structure Special versions («) The 3AH47 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 auxiliary devices which are necessary for operating and controlling 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 suffix...

17.5 kV 16.7 Hz, single-pole, 60,000 operating cycles 1) 10,000 operating cycles 2) 20,000 operating cycles 25 kV 25 Hz, single-pole, 60,000 operating cycles 25 Hz, two-pole, 60,000 operating cycles 3) Other ratings on request Configuration example 3AH47 vacuum circuit-breaker, single-pole Rated voltage r = 17.5 kV, 16.7 Hz Rated lightning impulse withstand voltage p = 125 kV Rated short-circuit breaking current Isc = 40 kA Rated normal current Ir = 2500 A Example for Order No.: |3AH4756-6 ■■■■ - ■■■■ Order codes: 3AH47 Vacuum Circuit-Breakers ■ Siemens HG 11.52 ■ 2017

Selection of basic types, circuit-breakers 27.5 kV 50/60 Hz, single-pole, 60,000 operating cycles Order codes 1) 20,000 operating cycles 27.5 kV 50/60 Hz, two-pole, 60,000 operating cycles Configuration example 3AH47 vacuum circuit-breaker, single-pole (r = 17.5 kV, 16.7 Hz, p = 125 kV, ISC = 40 kA, Ir = 2500 A) 5 6-6 Example for Order No.: |3AH4756-6 ■■■■ - ■■■■ Order codes: 3AH47 Vacuum Circuit-Breakers ■ Siemens HG 11.52 ■ 2017