Блок предохранителей в сборе с реле: Деконструкция 12 Важные детали для безупречной электрической защиты

This is an in-depth technical deconstruction of the Блок предохранителей в сборе с реле для FAW Jiefang CA3250P66K2L1T1E 6×4 самосвал. В этом руководстве подробно описаны 12 типы обслуживаемых компонентов, including the main 48-circuit box, the various blade fuses, and the integrated relays that protect the cab’s electrical systems.

The Блок предохранителей в сборе с реле is the central nervous system for all electrical equipment in the cab. It functions as the primary power distribution and protection hub. Located inside the cab, this module receives main power from the battery and chassis distribution box and splits it into dozens of individual, protected circuits.

Its primary role is to safeguard the vehicle’s expensive wiring harnesses and electronic modules from damage caused by over-currents and short circuits. It does this by utilizing a combination of sacrificial fuses and high-power switches (реле). Эта деконструкция позволит проанализировать основные компоненты Блок предохранителей в сборе с реле, включая основное жилье, the various types of relays, and the array of blade fuses. Правильно функционирующий Блок предохранителей в сборе с реле is essential for the reliability of every component, from the instrument cluster to the power windows and lights.

Основной 1: The “Распределение” Логика (The Main Housing)

Этот компонент является основой всего Блок предохранителей в сборе с реле. It is the physical structure that holds all the fuses and relays and contains the complex internal circuitry.

1. Компонент: ‘Fuse box assy (48-схема)’ (3722010-А01) – Кол-во 1
Этот (Комп 1) is the main housing. The 48-Circuit Logic means this single box is the distribution point for 48 independent electrical circuits. Внутренне, it consists of a multi-layer printed circuit board (PCB) or a complex network of busbars that route power from the ‘Main relay assy’ (Комп 12) to the various fuse and relay sockets.

This design simplifies the vehicle’s wiring harness, as all circuit protection is centralized in one serviceable location. This main housing of the Блок предохранителей в сборе с реле is a non-serviceable unit; if its internal busbars or PCB fails, the entire box must be replaced. Its cover (нет в списке) также имеет решающее значение, as it protects the components from dust, влага, and accidental shorts. The Блок предохранителей в сборе с реле housing is the nerve center of the cab.

Основной 2: The “High-Power Switching” Логика (The Relays)

Эта группа компонентов обеспечивает “мышца” для Блок предохранителей в сборе с реле. Relays are electro-mechanical switches that use a low-current signal (с переключателя на приборной панели) to control a high-current circuit (like headlights or a blower motor).

1. Компонент: «Главное реле в сборе’ (3722110-417) – Кол-во 1
Этот (Комп 12) is the master switch for the entire Блок предохранителей в сборе с реле. The Master Power Logic is that this large relay is typically activated by the ignition switch. Когда ключ повернут, it sends a low-current signal to this relay, which then closes and provides high-amperage 24V power to the main busbars of the fuse box, “waking up” all the vehicle’s electrical systems.

2. Компонент: ‘4-pin relay assy (20А)’ (3711030-240) – Кол-во 9
Этот (Комп 2) is the most common type of relay in the Блок предохранителей в сборе с реле. A 4-pin relay is a simple On/Off switch. Он имеет два “контроль” булавки (for the low-current signal) и два “нагрузка” булавки (for the high-current circuit). These are used for functions like headlights, противотуманные фары, or the HVAC blower motor.

3. Компонент: ‘5-pin relay assy (20А)’ (3741070-240) – Кол-во 2
Этот (Комп 11) is a more complex “переключение” реле. A 5-pin relay has one “общий” load pin that can switch between two different “выход” булавки (один “normally open” и один “normally closed”). Этот Changeover Logic is used for functions that require switching *between* two circuits, such as a high-beam/low-beam headlight system, or for a power window motor to reverse its direction (вверх/вниз). The presence of both types shows the complexity of the Блок предохранителей в сборе с реле.

Основной 3: The “Защита цепи” Логика (The Blade Fuses)

This group is the primary function of the Блок предохранителей в сборе с реле. These fuses are sacrificial components designed to fail instantly in an over-current or short-circuit situation, protecting the wiring and the component on that circuit.

The Sacrificial Logic это просто: a small metal filament inside the fuse is designed to melt and break the circuit if the current exceeds its rating (НАПРИМЕР., 10 Amps). This destroys the cheap fuse while saving the expensive wiring harness or electronic module from melting or catching fire.

1. Компонент: Low-Amperage Fuses (5А, 10А, 15А)
Эта группа (Комп 3, 4, 5) includes ‘5A Blade fuse’ (Кол-во 29), ’10A Blade fuse’ (Кол-во 17), and ’15A Blade fuse’ (Кол-во 8). These are used for low-power circuits. 5А (tan) is often for electronics, приборы, and sensor power. 10А (красный) is common for lighting circuits, радио, and control modules. 15А (blue) is often used for power sockets (cigarette lighter) and other medium-draw accessories. The large quantity of these shows the complexity of the Блок предохранителей в сборе с реле.

2. Компонент: High-Amperage Fuses (20А, 25А, 30А)
Этот (Комп 6, 7, 8) includes ’20A Blade fuse’ (Кол-во 3), ’25A Blade fuse’ (Кол-во 2), and ’30A Blade fuse’ (Кол-во 3). These are for high-load circuits. 20А (yellow) might be for the HVAC blower motor, 25А (natural/white) for power windows, and 30A (green) for a main circuit relay. Replacing a blown fuse in the Блок предохранителей в сборе с реле with a higher-rated one is extremely dangerous and can cause a fire.

Основной 4: The “Услуга & Монтаж” Логика (Аппаратное обеспечение)

This final group includes the hardware for mounting the Блок предохранителей в сборе с реле and servicing its components.

1. Компонент: ‘Fuse puller’ (171937579) – Кол-во 1
Этот (Комп 9) это маленький, plastic tool. The Сервисная логика is that this puller is often clipped inside the cover of the Блок предохранителей в сборе с реле. It is designed to safely grip and remove the small blade fuses (Комп 3-8) without the risk of using metal tools (which could cause a short) or damaging the fuses.

2. Компонент: 'Винт с потайной головкой и крестообразным шлицем в сборе’ (Q2360640) – Кол-во 2
Этот (Комп 10) is the mounting hardware. These are the bolts that secure the main ‘Fuse box assy (48-схема)’ (Комп 1) to its mounting bracket in the cab. Это обеспечивает Блок предохранителей в сборе с реле is held securely and does not vibrate, which could cause connections to become loose.

Блок предохранителей в сборе с реле: Complete 12-Part Breakdown

В следующей таблице представлена ​​полная, подробная разбивка всех 12 типы компонентов в Блок предохранителей в сборе с реле для FAW Jiefang CA3250P66K2L1T1E 6×4 самосвал. Этот список необходим для любой службы Блок предохранителей в сборе с реле.

Основные характеристики

Технические характеристики Блок предохранителей в сборе с реле are defined by its function as the central power distribution and circuit protection module for the cab’s 24V electrical systems. A well-maintained Блок предохранителей в сборе с реле is critical for vehicle reliability.