Mobile Trailer-Mounted Generator Selection Guide
Jul 08,2025
In numerous scenarios requiring temporary or emergency power supply, such as construction sites, field operations, and emergency rescue, mobile trailer-mounted generator sets have become an ideal power choice due to their high mobility and convenient installation.
In numerous scenarios requiring temporary or emergency power supply, such as construction sites, field operations, and emergency rescue, mobile trailer-mounted generator sets have become an ideal power choice due to their high mobility and convenient installation. However, with numerous brands and complex specifications of mobile trailer-mounted generator sets on the market, how can one choose a product that meets their needs? Next, we will delve into the key points of selection from multiple key dimensions.
1. Accurate Calculation of Load Power: Before selecting a mobile trailer-mounted generator set, it is imperative to accurately calculate the total power required by the power supply equipment. This not only considers the power during normal operation of the equipment but also focuses on the peak power at the moment of startup. For some large motor equipment, the starting current will far exceed the normal operating current. If the generator set's power is insufficient, it may cause unstable power supply or even failure to start during equipment startup. For example, a motor with a rated power of 50kW may have a starting current that reaches 5-7 times the rated current when using direct start, requiring the generator set to provide sufficient starting power in a short time.
2. Allow for Reasonable Margin To ensure that the generator set can operate stably under various operating conditions, it is recommended to reserve a power margin of 10%-20% based on the calculated total load power. This is because there may be some unforeseen electricity demands in actual operation, or power fluctuations may occur during equipment operation. An appropriate margin can effectively prevent the generator set from being damaged due to overload and extend its service life.
1. Trailer Structure and Chassis: The trailer structure and chassis of a mobile trailer-mounted generator set directly affect its mobility. A high-quality trailer should be made of high-strength steel to ensure a sturdy and durable structure that can withstand bumps and vibrations during transportation. The chassis design should fully consider the center of gravity distribution to ensure stability during driving. At the same time, the trailer's suspension system cannot be ignored; a good suspension system can effectively reduce vibration and reduce damage to the generator set. For example, some trailers using leaf spring suspension structures have good shock absorption performance and load-bearing capacity.
2. Towing and Braking System: The towing device should have high adjustability to adapt to towing vehicles of different heights, and have a large turning angle to ensure flexible steering in narrow spaces and complex road conditions. The common design of a movable hook with a 180° turntable can well meet this requirement. The braking system must be reliable and equipped with an air brake interface and a manual braking system to ensure safety during driving. On some long downhill sections, the air brake system can continuously and stably provide braking force, while the manual braking system can serve as an emergency backup.
1. Temperature Adaptability If the operating environment has large temperature fluctuations, the generator set needs to have good temperature adaptability. In high-temperature environments, the generator set's cooling system must be efficient, able to dissipate heat in time to prevent the unit from shutting down due to overheating. Some generator sets are equipped with high-power cooling fans and efficient radiators to ensure normal operation even in high-temperature environments. In low-temperature environments, the unit needs to have a preheating function to ensure that the engine can start smoothly. For example, some units use electric heating devices to preheat the oil and coolant.
2. Altitude Adaptability: As the altitude increases, the air becomes thinner, which affects the engine's intake, thereby reducing the generator set's output power. If the location of use is at a high altitude, it is necessary to choose a specially designed generator set that can adapt to high-altitude environments. These units usually optimize the intake system, such as adding a turbocharger, to increase the intake and ensure engine power output.
1. Quiet Operation Scenarios: If the mobile trailer-mounted generator set will be used in noise-sensitive areas such as hospitals, schools, and residential areas, then noise control becomes a key consideration. In these places, excessive noise will not only interfere with people's normal lives and work but may also lead to complaints. For example, near a hospital's operating room, the generator set needs to control noise to an extremely low level while providing stable power.
2. Noise Reduction Technology and Measures: To reduce noise, manufacturers usually use various technologies and measures. On the one hand, sound insulation materials such as sound-absorbing cotton and sound insulation rubber are used on the generator set's shell to block the transmission of noise. On the other hand, the engine's exhaust system is optimized, and devices such as mufflers are used to reduce exhaust noise. In addition, the internal structure of the unit can be optimized to reduce friction and vibration between mechanical parts, thereby reducing noise generation. Some high-end quiet mobile trailer-mounted generator sets can control noise to below 50-60 decibels, meeting the requirements of most noise-sensitive places.
1. Brand Strength and Reputation: Choosing a mobile trailer-mounted generator set from a well-known brand often means higher product quality and reliability. Well-known brands follow strict quality control standards during production, using high-quality raw materials and advanced production processes. At the same time, brand reputation is also an important reflection of product quality and performance. You can learn about the reputation of different brands in the market by consulting user reviews and industry reports. For example, Cummins and Yuchai have many years of experience in the generator set field, and their product quality has been widely recognized.
2. After-Sales Service Quality: As a mechanical device, generator sets are bound to encounter malfunctions during use, and at this time, high-quality after-sales service is particularly important. When selecting, it is necessary to understand whether the manufacturer provides a complete after-sales service system, including the distribution of after-sales service outlets, response time, and the professional level of maintenance personnel. Widely distributed after-sales service outlets can quickly arrive on-site for repairs when equipment malfunctions; a short response time can minimize losses to users caused by power outages. Some manufacturers also provide regular equipment maintenance and maintenance services to help users extend the service life of the generator set.
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