Cooling of switch parts (H01H9/52)

Circuit breaker unit // 2608173
FIELD: electricity.SUBSTANCE: invention relates to a normally closed power circuit breaker unit. Power circuit breaker unit has first and second arcing contact pieces (4, 5). Between arc-quenching contact parts (4, 5) there is a solution (6) contacts. Switch gas channel of circuit breaker unit joins contact gap (6) to surrounding area of circuit breaker unit for cooling a switch gas from contact gap (6). Several barriers (21a, 21b, 21c, 21d, 21e) that increase a flow resistance are arranged successively, spaced from one another, in switch gas channel. At least one of barriers (21a, 21b, 21c, 21d, 21e) is arranged between first pipe section (12), which is surrounded by second pipe section (14), and second pipe section (14).EFFECT: efficient cooling of switch gas with a compact design.7 cl, 1 dwg

Pole part of medium voltage switching device // 2449402
FIELD: electricity.SUBSTANCE: invention relates to pole part of switching device with vacuum interrupter chamber enclosed into insulation material and containing fixed and moving contacts. Herewith, cast insulating housing is open in lower part in the area of moving contact or drive rod actuating moving contact. In the area of moving contact or at the place where it is coupled with drive rod (3), at least one vent hole (7) is made which passes through the wall of insulation (2), boundary zone between insulation and electric coupling part or through electric coupling part (4) of moving contact. The vent hole (7) is formed in coupling part (4) by means of at least one through bleed screw (8) with the help of which external contact is fixed in coupling part, at the same time, a hole accommodating at least one such bleed screw is through and connects external and internal areas of pole part to be ventilated.EFFECT: reducing pole parts heating during operation and obtaining higher allowable nominal current load.5 cl, 1 dwg

High-voltage switch with cooling // 2401473
FIELD: electricity.SUBSTANCE: switch (20) contains extended inner conductor (21) and outer conductor (22) wrapping inner conductor (21) as shrouding. To dissipate heat losses of inner conductor (21) the switch is fitted with at least one heat pipe (1) which goes from inner conductor (21) to outer conductor (22) and has isolating hollow body (5) creating isolating gap (7). Evaporation and condensation of working medium (2) in pipe (1) takes place at different electric potential. In this process, evaporations and condensations are separated by flexibly deformed section (9) of the pipe (1) permitting avoidance of mechanical loads. The pipe (1) may pass in carrying isolator (24) which supports inner conductor (21).EFFECT: cooling efficiency improvement and service simplification of the switch.18 cl, 5 dwg

Casing made from electric insulating material with ventilation shaft // 2366023
FIELD: electrical engineering.SUBSTANCE: invention relates to a casing made from electric insulating material (1) with a fastening section (2) meant for installation of an arc-extinguishing chamber, where the fastening section has an inlet connecting piece (5), and an actuating section (3), which adjoins the fastening section lengthwise, where the actuating section has an actuating hole for moving the actuator into the arc-extinguishing chamber, and has an outlet connecting piece (8). In the casing there is ventilation shaft (12), which surrounds the fastening section (2) in form of a collar, where the ventilation shaft is linked to the inside of the actuating section (3).EFFECT: high cooling power, also sufficient for large currents.11 cl, 3 dwg

Electric switching apparatus incorporating cooling device // 2309477
FIELD: electrical engineering.SUBSTANCE: proposed electric switching apparatus is characterized in that arc-control gas flow is set up in the course of its OFF-operation and has cooling device with solid wall and through holes, at least one of them being closed by means of sleeve fittings connected to cooling device through detachable joint.EFFECT: facilitated coordination of device cooling capacity.8 cl, 1 dwg