FIELD: electrical engineering.
SUBSTANCE: invention is related to automatic circuit breakers. Air circuit breaker comprises two separated electric contacts connected to terminals for input and output of electric current, and chamber (18) for electric arc quenching, including stack (20) of separation plates (22), which are spaced from each other, and side walls (24) located on each side of foot (20) and including polyamide fabric impregnated with thermosetting resin and devoid of glass fibers. Technical result is achieved due to that arc-quenching chamber (18) is additionally equipped with protective elements (40) made of polyamide with a cross-linked structure. Said elements are located in connection areas between side walls (24) and retaining plates (22), wherein protective elements (40) close angles (49) of separation plates (22) adjacent to side walls (24) in order to separate said angles (49) of separating plates (22) from electric contacts.
EFFECT: technical result is an increase in reliability.
10 cl, 5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ELECTRIC DEVICE FOR INTERRUPTION OF ELECTRIC CURRENT IN AIR, COMPRISING AN IMPROVED DEVICE FOR FILTERING GAS FUMES | 2017 |
|
RU2719403C2 |
| AUTOMATIC CIRCUIT BREAKER | 1990 |
|
RU2027241C1 |
| AUTOMATIC CIRCUIT BREAKER | 2016 |
|
RU2713497C2 |
| CONTACTOR RESISTANT TO IMPACT OF ELECTRIC ARC | 2010 |
|
RU2451359C2 |
| HIGH-SPEED SWITCH INTENDED FOR USE IN INDUSTRY AND RAILWAY INDUSTRY | 2018 |
|
RU2718797C1 |
| LIMITING POLE FOR ELECTRIC SWITCH AND DC SWITCH INCLUDING SUCH LIMITING POLE | 2020 |
|
RU2804272C2 |
| GAS ISOLATED LOW OR MEDIUM VOLTAGE LOAD BREAKER | 2017 |
|
RU2738087C2 |
| ARC-QUENCHING CHAMBER FOR CONTACTOR AND CONTACTOR FOR ELECTRIC ARC QUENCHING | 2014 |
|
RU2594754C2 |
| SURGE PROTECTION, COMPRISING AT LEAST ONE ARRESTER | 2011 |
|
RU2586994C2 |
| ARC-CONTROL CASING OF ELECTRIC SWITCHING APPARATUS | 2004 |
|
RU2320046C2 |
