Medium-Voltage Equipment Vacuum Contactors Catalog HG 11.23

Vacuum Contactors · Siemens HG 11.23 · 2021

Contents Contents Medium-Voltage Equipment Catalog HG 11.23 • 2021 Vacuum Contactors ■ Siemens HG 11.23 ■ 2021

Vacuum Contactors · Siemens HG 11.23 · 2021

Contents Contents Chapter/ Page Construction and mode of operation 9 Ambient conditions, dielectric strength, short-time withstand current and rated operational current 13 Switching duties 14 Standards and type approval 16 Order number structure, configuration example 18 Selection of 3TM3 and 3TM1 vacuum contactors 22 Secondary equipment 3TM3 and 3TM1 23 Special versions and additional equipment 25 Spare parts, accessories and rating plate 26 Electrical data, dimensions and weights 30 Transport dimensions and weights 35 The products and systems described in this catalog are manufactured and sold...

Vacuum Contactors · Siemens HG 11.23 · 2021

Description Contents Function and mode of operation 10 Control supply voltage, wide-area coils 10 Safety shutdown of the magnetic actuator in case of deviation from the normal closing time 10 Intermittent periodic duty and rapid operation 10 Mechanical closing latch (optional) 12 Closing and opening delay 12 Ambient conditions, dielectric strength, short-time withstand current and rated operational current 13 Ambient conditions 13 Short-time withstand current 13 Rated operational current 13 Surge protection via limiters 14 Short-circuit protection via HV HRC fuses 15 Coordinating the components...

Description General 3TM vacuum contactors – the new contactor generation 3TM vacuum contactors are electromechanical, monostable load breaking devices with a limited shortcircuit making and breaking capacity. They can be used for high switching rates of up to one illion m electrical and mechanical operating cycles and unlimited operating time, as well as for fast switching frequencies. Contactor, front (high-voltage side) Contactor, front (high-voltage side) Contactor, rear (fixing side) Contactor, front (high-voltage side) *) On request Vacuum Contactors · Siemens HG 11.23 · 2021

Description Construction and mode of operation 3TM vacuum contactors are suitable for operational s witching of AC circuits of any kind, such as: • Three-phase motors for reversing, inversing or direct duty (utilization category AC-1 to AC-4) • Transformers • Capacitors, also back-to-back • Reactors • Resistive consumers. They are used in conveying and elevator systems, pumping stations, air conditioning systems, as well as in systems for reactive power compensation, on ships, in wind power plants, in open-cast mining, in earthquake zones and in railway operation, and can therefore be found in...

Description Construction and mode of operation Function and mode of operation Control supply voltage, wide-area coils The drive lever (3) with the pivot point in A is designed as an angle lever. It represents the kinematic connection etween b the magnetic actuator and the vacuum interrupters. In case of non-excited magnet, the return springs keep the drive l ever in “OPEN” position. 3TM vacuum contactors can be optionally operated with DC or AC. The control supply voltage should correspond to the data on the rating plate. Thus, the drive lever (3) is in its upper position via the bearing (4)...

Description Construction and mode of operation Side view 1.1 2-pole design 1) 1 Molded-plastic housing (pole shell) 2 Operating mechanism box 3 Drive lever 4 Bearing 5 Guide nut + locknut 6 Magnet armature 7 Magnet system 8 Vacuum interrupter 9 Contact pressure spring 10 Connection, top 11 Flexible connector 12 Connection, bottom 13 Controller 14 Connection for control voltage A1 A2 (incl. supplied plug) 15 Connection for el.magn. release E1 E2 (incl. supplied plug) 16 Position indicator 17 Base plate (fixing) 18 Closing latch 19 Shunt release 20 Manual release (emergency off) 21 Earthing connection...

Description Construction and mode of operation 1.1 Mechanical closing latch (optionally) When the 3TM vacuum contactor is closed, the mechanical closing latch (18) is activated. After reaching the latching position, there is an automatic changeover to no-load holding operation. Opening takes place via: • Electromagnetic latch release (remote tripping via the electromagnetic shunt release) (19), or • Manual mechanical latch release (20). When retrofitting (selection B at the 10th digit of the order number) with a closing latch or a latch release, the following modules are to be ordered and mounted...

Description Ambient conditions, dielectric strength, short-time withstand current and rated operational current Rated operational current characteristic Ambient conditions 3TM vacuum contactors are suitable for operational use in the following climatic classes according to IEC 60721: conditions Mechanical ambient 3M11 IEC 60721-3-3 conditions Chemically active C3 3) ISO 9223 substances Mechanically active 3S6 4) IEC 60721-3-3 1) Maximum of 24-hour mean: +70 °C 2) Up to -40 °C 3) Without appearance of saline fog and simultaneous condensation 4) Restriction: Clean insulation parts Dielectric strength...

Description Switching duties 1.1 Utilization categories According to IEC 62271 -106, vacuum contactors are divided into different utilization categories. The opposite table shows typical applications in accordance with the respective utilization category. Switching of motors 3TM vacuum contactors are especially suitable for frequent operation of motors. As the chopping currents of the contactors are < 3 A, no impermissibly high overvoltages are produced when accelerated motors are switched during normal operation. However, when high-voltage motors with starting currents of < 600 A are stopped...

Description Switching duties Short-circuit protection via HV HRC fuses At high short-circuit currents, HV HRC fuses have a current limiting effect, i.e. the fuse limits the short-circuit current to the let-through current. When selecting the fuses, the type of consumer must be observed, e.g. motor, transformer, capacitor. The opposite diagram shows an example for the coordination of an HV HRC fuse with a time-overcurrent protection. Coordinating the components of the motor circuit Sustained symmetrical short-circuit current (r.m.s. value) Example for the coordination of an HV HRC fuse characteristic...