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  • Scope of Application

    TXB8F-80 Auto Reset Circuit Breaker (hereinafter referred to as circuit breaker), suitable for the circuit of AC 50Hz, rated voltage up to 400V, rated current up to 80A, remote control disconnect and close the circuit breaker, can use the automatic signals to control the opening and closing of the circuit breaker at the same time, provide protection of overload and short circuit for circuits, can also be used with no-voltage release to achieve functions of opening after power-off and automatic closing after power-on. At present, TXB8F-80 Auto Reset Circuit Breaker is widely used in photovoltaic grid AC distribution box, and the occasions where people are hard to approach, where maintenance personnel can not arrive in time, unattended occasions, occasions with high power supply continuity requirements.
    TXB8F-80 Auto Reset Circuit Breaker, is a new type researched and developed independently by TAIXI, which can achieve functions of automatically open the circuit and automatically turn on the circuit, but also achieve the effective protection for the line and terminal equipment, meanwhile feedback the state signal of closing and opening.
    TXB8F-80 Auto Reset Circuit Breaker meet the standards: GB10963.1, IEC60898-1, with the international advanced level.

    Model and meaning

    Product Model Pole Trip type Rated current
    TXB8F-80 1P+N C 80


    6:6A 20:20A 50:50A

    10:10A 32:32A 63:63A

    16:16A 40:40A 80:80A

    Normal working conditions and installation conditions

    Ambient temperature: -25 ℃~+60 ℃;
    Altitude: The altitude of the installation site is not more than 2000m;
    Installation categories: Ⅱ, Ⅲ;
    Installation: TH35-7.5 steel rail for installation.

    Main parameters and technical performance

    According to the rated current In: 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A.
    According to the poles (POLE): 1P + N single-phase, 3P + N three-phase.
    According to the form of circuit breaker instantaneous release: C-type (5In~10In)
    Electrical life: 4000 times, cos=0.85~0.9;
    Mechanical life: 20,000 times
    Protection class: IP20
    Rated operating voltage Ue: 1P+N/2P 230V AC/50Hz; 3P+N/P 400V AC/50Hz
    Automatic reclosing: tc: ≥ 3s
    Rated short-circuit breaking capacity: 7500A (6-63A); 4500A (80A)
    Control wire connected to external signal: conductor cross-section is 0.6mm², length is 30cm (other lengths can be specially produced) with crimped terminal.
    Terminals: suitable for wire connection of 35mm or less, wiring method is tightening the wiring with screws, torque is 3.5N·m.

    Over-current protection characteristic at 30℃~35℃

    No. Rated current(A) Test current Initial state Set time Appointed time Remark
    1 6~80 1.13In Cold t≥1h ln≤63A
    t≥2h ln>63A
    Non tripping
    2 6~80 1.45In After the last test t<1h ln≤63A
    t<2h ln>63A
    Tripping The current rise steadily to
    a fixed value within 5S
    3 ln≤32 2.55In Cold 1s Tripping
    ln>32 2.55In Cold 1s Non tripping Close the auxiliary
    switch to turn on
    the current
    4 6~80 5In
    Cold t≤0.1s

    Non tripping


    Characteristics of automatic reclosing-opening

    Model Rated control voltage Auto closing time Auto opening time Repeat operation interval
    TXB8-80 230V t<10s t<10s 3min

    Current correction value used at different ambient temperatures


    corrected current value(A)

    Rated current(A)

    -30 -20 -10 0 10 20 30 40 50 60
    10 12.5 12.4 11.9 11.3 10.8 10.4 10 9.7 9.2 8.5
    16 20 19.8 18.9 18.1 17.3 16.5 16 15.5 14.6 13.8
    20 25 24.8 23.6 22.6 21.1 20.6 20 19.4 18.2 17.2
    25 21.25 31 29.5 28.3 27 25.8 25 24.3 22.8 21.3
    32 40 39.7 37.8 36.2 34.6 33 32 31 28.8 27.2
    40 50 49.6 47.2 45.2 43.2 40.8 40 38.4 37.2 .5.2
    50 63.5 62.5 59 56.5 54 51.5 50 48 45.5 43
    63 80.01 78.8 74.3 71.2 68 64.9 63 60.5 57.3 54.2
    80 101.6 100 94.3 90.4 82.4 82.4 80 76.8 72.8 68.8

    Structural features

    XB8F-80 Auto Reset Circuit Breaker, has the following characteristics:
    ◆ All the poles have over-current protection, short circuit protection;
    ◆ Rated breaking capacity up to 10KA;
    ◆ Circuit breaker operating mechanism is trip-free mechanism with the energy storage, contacts are quickly closed and quickly break, overcome the adverse effects of the handle speed driven by circuit breaker in the processes of automatic opening and automatic closing, greatly improve product life; in normal work, the contact can only stay in the closing or breaking position;
    ◆ Automatic reclosing, openinge device, drive components are made of the SCR, integrated chip, motor, gear;
    ◆ Case and components are made of plastic with high flame retardant, high temperature resistance, impact resistant.

    Tripping characteristic curve

    Tripping characteristic curve of circuit breaker overload current

    C-type tripping characteristic curve

    Wiring requirements

    36mm² and below wire connection, wiring method with screws to tighten the wiring, torque is 3.5N · m.

    Rated current In(A) Copper conductor nominal cross-sectional area(mm²)
    1~6 1
    10 1.5
    16~20 2.5
    25 4
    32 6
    40~50 10
    63 16
    80 25

    Application Example

    Outline and installation dimensions

    Keywords: auto reset Circuit Breaker

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