- Чанчунь город, Провинция Цзилинь, Китай
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Welcome to this essential expert breakdown of the Блок предохранителей FAW в сборе 1 – С реле. This specific component is a critical electrical distribution and safety hub found in the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. As an auxiliary module (designated “Assembly 1”), его “логика” is to provide a centralized, защищен, and switchable power source for a specific group of high-amperage accessories, all while being isolated from the main cab fuse box.
The Блок предохранителей FAW в сборе 1 – С реле (Часть №. 3722020B91W) is a self-contained unit that combines two distinct electrical functions: circuit protection (предохранители) and circuit control (реле). Этот “логика” of combination is vital for modern truck electronics. It simplifies wiring, centralizes fault-finding, and isolates high-power devices from sensitive dashboard switches. A failure in this box could disable critical auxiliary systems, making its proper service a key maintenance task.
This in-depth guide is designed for technicians and parts specialists. Мы разберем всю Блок предохранителей FAW в сборе 1 – С реле into its three core component types: the main structural housing, the ‘Four-pin relay’ (3752015-91Вт) собрания, and the full set of blade-type fuses (5А, 10А, 15А, 20А). Understanding each of these minimum serviceable units (МГУ) is essential for rapid diagnostics and cost-effective repairs.
The ‘Fuse box assembly 1-with relay’ (3722020B91W) is the primary structural component. Это основной “large purchase item” and serves as the foundation for all the serviceable units it contains. Its function goes far beyond being a simple plastic box.
Внутренняя логика: The housing’s true “логика” is internal. It contains a network of copper busbars and electrical pathways. These busbars are responsible for distributing the main power input (from the battery) к “горячий” side of each fuse and relay socket. This pre-engineered internal wiring eliminates a “rat’s nest” of external wires, increasing reliability and reducing potential points of failure.
Construction and Durability: Эта часть Блок предохранителей FAW в сборе 1 – С реле построен из высококачественного, heat-resistant, and impact-resistant polymers. It is designed to be mounted in the engine bay or on the chassis, exposing it to vibration, влага, и экстремальные температуры.
Поэтому, it always includes a weather-proof gasket on its locking cover. A failed gasket is a common source of problems, as it allows water ingress, which leads to pin corrosion and electrical shorts.
Удобство обслуживания: The housing itself is *not* a typical MSU. It is only replaced in the event of catastrophic failure, such as physical cracks from an impact, melting from a severe electrical fire, or internal busbar corrosion that is beyond cleaning. For all other faults, the MSUs are the components *inside* it.
Это “дольше” and more detailed section, as these relays are the primary “логика” actuators in the Блок предохранителей FAW в сборе 1 – С реле. The parts list calls for five of these ‘Four-pin relay assy’ (3752015-91Вт) компоненты.
What is a Relay? A relay is an electromagnetic switch. Its function is to allow a very low-power electrical circuit to control a very high-power electrical circuit safely. A 24V dashboard switch, например, cannot handle the 20-30 amps required to run a high-power device like a fuel heater or a bank of fog lights. Running that much current into the cab would require thick, тяжелый, and expensive copper wires and a dangerously large switch.
The “Four-Pin” Логика: The relay solves this. The “логика” of a standard 4-pin (ISO) relay is simple and brilliant:
When the driver flips the dashboard switch, it sends a low-power signal to pins 85/86. The electromagnet “щелчки,” pulling a physical lever (арматура) inside the relay, which closes the high-power connection between Pin 30 and Pin 87. This instantly sends the high-amperage current to the device.
Отказ & Удобство обслуживания: Relays are the most common electro-mechanical failure point in any vehicle. Because they have moving parts, the internal contacts can become “pitted” or carbonized from arcing, leading to a poor connection (the device works intermittently). Альтернативно, the contacts can “сваривать” themselves shut from a current surge (the device won’t turn off). Окончательно, the low-power coil (85/86) can simply burn out (the device won’t turn on, and the relay makes no “щелкнуть”).
The ‘Four-pin relay assy’ is the definition of a Minimum Serviceable Unit (МГУ). It is designed to be “plug-and-play.” A technician can quickly test a relay by swapping it with a known good one (since there are 5 identical units in the box). This makes diagnosis in the field extremely efficient, which is the entire purpose of the Блок предохранителей FAW в сборе 1 – С реле дизайн.
The second category of MSUs within the Блок предохранителей FAW в сборе 1 – С реле is the set of ‘Blade-type fuses’ (片式熔断器). Это “жертвенный” components of the electrical system.
The Logic of Protection: A fuse’s only job is to fail. Это “логика” device that senses an overcurrent condition (НАПРИМЕР., from a short circuit or a failing component) and instantly “blows.” A small metal link inside the fuse melts, creating an open circuit and cutting off power.
This sacrificial failure is critical. It protects the two most expensive parts of the circuit: the wiring harness (which can melt and cause a fire) and the end-component (like a sensitive ECU or expensive lighting assembly). А $0.20 fuse saves a $500 компонент.
Deconstructing the Fuse List: The Блок предохранителей FAW в сборе 1 – С реле is populated with a specific set of fuses, each with a purpose:
These fuses are the most common MSU. They are color-coded, and their transparent plastic housing allows for instant visual inspection of the internal link, making them the easiest component to diagnose and replace.
The following table is the complete parts breakdown for the Блок предохранителей FAW в сборе 1 – С реле, as specified for the FAW CA4251P66K24T1A3E5. It details the main housing and all associated serviceable relays and fuses.
| Отметка | Часть №. | Наименование | Количество |
|---|---|---|---|
| 1 | 3722020B91W | Fuse box assembly 1-with relay (см. рисунок) | 1 |
| 2 | 3752015-91Вт | Four-pin relay assy | 5 |
| 3 | 3722011-50 | 5A Blade-type fuse | 2 |
| 4 | 3722012-50 | 10A Blade-type fuse (видеть 3722011-50) | 2 |
| 5 | 3722013-50 | 15A Blade-type fuse (видеть 3722011-50) | 1 |
| 6 | 3722014-50 | 20A Blade-type fuse (видеть 3722011-50) | 1 |
Технические характеристики Блок предохранителей FAW в сборе 1 – С реле are defined by its role as an auxiliary power distribution and protection module. It is a fully-integrated unit designed for high-vibration, high-demand environments.
| Приложение для автомобиля | FAW Цзефан CA4251P66K24T1A3E5 6×4 Трактор |
| Группа компонентов | Блок предохранителей FAW в сборе 1 – С реле |
| Main Assembly Part No. | 3722020B91W |
| Тип системы | Auxiliary Electrical Protection & Switching Module |
| Системное напряжение | 24В Вашингтоне (Номинальный) |
| МГУ 1 (Switching) | ‘Four-pin relay assy’ (Артикул: 3752015-91Вт) |
| МГУ 1 Количество | 5 Units |
| МГУ 2 (Защита) | Blade-Type Fuses (ATO/ATC) |
| Fuse Amperages | 5А (x2), 10А (x2), 15А (x1), 20А (x1) |
| Total Fuse Sockets | 6 (Populated) |
| Жилье | Sealed polymer with internal busbars and locking cover |
Запчасти ФАВ, включая блок цилиндров в сборе, тщательно упакованы, чтобы обеспечить безопасную доставку. Каждый компонент закреплен защитными материалами для предотвращения повреждений при транспортировке.. Логистическая сеть гарантирует своевременную доставку по всему миру., поддержка эффективных операций по техническому обслуживанию. Ниже приведено изображение, иллюстрирующее стандартную упаковку запчастей для грузовиков FAW., демонстрация внимания к деталям в обращении и хранении.
Такой подход к упаковке сводит к минимуму риск коррозии или ударного повреждения., обеспечение доставки таких деталей, как блок цилиндров FAW в сборе, в идеальном состоянии.. Клиенты могут положиться на логистику FAW для обеспечения стабильного качества и надежности..
FAW — один из старейших и крупнейших производителей автомобилей в Китае., с уставным капиталом в юанях 35.4 млрд юаней и общие активы юаней 457.83 миллиард юаней.
КИТАЙСКАЯ ГРУППА FAW CO., ООО. (сокращение от FAW), бывший Китайский первый автомобильный завод, можно проследить его корни до июля 15, 1953, когда началось строительство первого сборочного завода. FAW — один из старейших и крупнейших производителей автомобилей в Китае., с уставным капиталом в юанях 35.4 млрд юаней и общие активы юаней 457.83 миллиард юаней.
Продажи тяжелых грузовиков в Китае по всему миру “пять подряд”, продажи тяжелых грузовиков по всему миру “шесть подряд”, продажа тракторов для 16 годы подряд абсолютный лидер отрасли.
