DC Load Box
1. Product Overview
The QGDC800-120KW high-voltage DC load box has a built-in pure resistive load; the power input adopts segmented combination control, which can simulate various power loads in any combination to meet the full load testing needs of chargers, DC power supplies, etc. It is a necessary testing tool for production workshops, laboratories, installation and debugging, and scientific research and development. The discharge power can be arbitrarily combined and set according to the performance parameter detection requirements. The power input adopts segmented switch control. The load works in an energy-consuming manner, and forced air cooling is used for heat dissipation. The fan adopts a small axial flow fan, which has the characteristics of large air volume, good heat dissipation and low noise.
The above features make the whole machine superior to imported products in terms of safety, reliability and noise reduction.
2. Technical parameters
3. Resistive load module
Alloy resistance
The resistive load module is made up of several special nickel-chromium alloy resistors connected together. As a power consumption component, the alloy resistor is processed and manufactured from a special alloy. The outside is a heat sink made of 304 stainless steel, and the middle is filled with an insulating medium. The resistor is packaged in it, which can meet the needs of load testing.
The alloy resistor has good insulation performance, high heat dissipation performance, uniform heat conduction, operating temperature is only 1/3 of the design temperature, small temperature drift, stable resistance value, and no red heat during long-term operation. It is also resistant to acid and alkali, salt spray, rain, moisture and corrosion, and can be used all day long.
The resistive load module uses unique technology to fix the alloy resistor on the insulating material board. The entire module is sealed and separated by two layers of internal insulation and insulation board. The insulation and safety can be confirmed even in humid weather, and short circuit accidents caused by the decrease in internal resistance of adjacent resistors can be prevented.
4. Service
4.1 Service process
The specific process and content are as follows:
(1) Technical solutions: Propose technical solutions based on needs as a reference plan for users.
(2) Technical agreement: Both parties negotiate based on the actual situation and agree on a final technical agreement based on the plan. The design and production of the system will be carried out strictly in accordance with the final agreement.
(3) Design: Design the structure, circuit and software according to the technical agreement.
(4) Production: Assemble according to design drawings.
(5) Pre-factory inspection: The equipment shall be strictly debugged and inspected in accordance with the technical agreement and relevant standards. If the equipment does not meet the standards, it will not be released from the factory. Users can also send technical personnel to the production base
Carry out acceptance.
(6) Transportation: Safely transport the system to the location designated by the user.
(7) On-site service: dispatch technical personnel to the user's work site to assist in system installation, debugging, training, and acceptance.
4.2 Quality management
During the system design, production and inspection process, the manufacturer takes the following measures to confirm that the system quality is qualified and meets user needs:
(1) The design and production of the system are carried out in accordance with the formal technical agreement agreed upon by both parties.
(2) During the production process, a special inspection department conducts strict quality inspection on the raw materials used in the system.
(3) Conduct full quality tracking during component processing, assembly, and debugging, and establish product files.
(4) Confirm that all accessories are advanced, brand-new, complete, reasonably assembled and arranged, and comply with relevant national standards. The inside of the equipment is clean, the wiring is neat, all wiring is in accordance with the drawings, and the interfaces and switches are correctly and clearly marked.
(5) Strictly follow the requirements of the drawings and relevant standards and specifications to carry out the functions and participation of the system.
Digital verification ensures that the final product can achieve all the contents agreed in the technical agreement.
4.3 Acceptance
Both parties can accept the system through actual operations. After the system is produced, the user will be notified 3 days in advance to conduct a performance test before leaving the factory, and the system can only leave the factory after passing the acceptance inspection.
Observe the following matters during acceptance:
(1) Factory acceptance testing shall be carried out in accordance with the technical agreement and the acceptance outline agreed upon by both parties.
(2) The factory will appoint technical backbones to the scene to provide technical services and training.
(3) When using the system for the first time, provide multi-faceted guidance to the technical personnel involved in user acceptance and teach how to use it.
(4) Guide users to install and debug according to technical information and drawings.
(5) The factory is responsible for solving problems that arise during production and manufacturing.
(6) The factory acceptance test is only a functional test, and the load test is a final acceptance item and is carried out during the user's formal load test.
4.4 On-site service
After the system leaves the factory, the factory will dispatch technical personnel to provide users with complete on-site services.
Includes the following:
(1) The manufacturer is responsible for the transportation of the system and confirms that all system accessories are delivered to the user's designated location before the agreed date.
(2) The factory sends technical personnel to assist users in completing the installation and debugging process of the system.
(3) The factory provides relevant training for users’ technical personnel to meet the needs of daily work and maintenance of the system.
(4) During the training period, the factory assigns experienced technical personnel as guides.
(5) Confirm that the trained personnel understand the working principles, operating methods, precautions, response methods under various abnormal conditions and daily maintenance methods of the system.
4.5 Lifetime service
If users encounter any technical problems during the use of the system, they can call the after-sales hotline to contact us. The factory needs to provide lifelong technical services, including the following:
(1) The system quality confirmation period is calculated from the date of system acceptance and lasts for 1 year.
(2) If any quality problems occur with the system during the warranty period, the factory will provide free repairs.
(3) After the user encounters a problem and contacts the manufacturer, a reply will be confirmed within 8 hours.
(4) If technicians need to be dispatched to the site to solve the problem, they must arrive at the site within 48 hours. The service personnel will not evacuate until the problem is solved.
(5) Users can enjoy free technical consulting services.
(6) Save complete product technical files for users.
(7) After the one-year warranty period, users will be provided with lifetime paid maintenance services, and only the cost will be charged.
(8) If necessary, the factory will upgrade the system for users at preferential prices.