General Test Methods for Internal Combustion Engine Power Stations
1Key Takeaways
This standard provides a comprehensive framework for conducting general testing procedures on internal combustion engine power stations. It outlines the methodologies, equipment requirements, and operational conditions necessary to ensure consistent and reliable test results. The document specifies the parameters that …
2Expert Interpretation
This article interprets the new standard GB/T 20136—2025 "General Test Methods for Internal Combustion Engine Power Stations", focusing on the analysis of newly added safety items such as drop tests, protective inspections, and overspeed protection. It compares the technical changes with the 2006 version and provides test implementation suggestions to help enterprises improve the quality and reliability of power stations.
Standard Overview and Background
GB/T 20136—2025 "General Test Methods for Internal Combustion Engine Power Stations" was issued by the State Administration for Market Regulation and the Standardization Administration of China and will be officially implemented in 2025, replacing the 2006 version. This standard is under the jurisdiction of the National Technical Committee on Standardization of Mobile Power Stations (SAC/TC329) and was jointly drafted by Lanzhou Power Vehicle Research Institute Co., Ltd. and other units. The standard specifies general test methods for reciprocating internal combustion engine-driven land-based power stations, applicable to all types of mobile and stationary power stations; other types of power stations can refer to this standard.
Main Technical Changes and Evolution
Compared with the 2006 version, the new standard, based on structural optimization and editorial adjustments, has added several safety and functional test items, reflecting the industry's higher requirements for power station reliability and personnel protection.
Key changes include: unifying "checking short-circuit protection function (ammeter method/oscilloscope method)" into "short-circuit protection function check"; changing "overspeed protection" and "underspeed protection" to "overfrequency protection" and "underfrequency protection" respectively; and adding drop test, protective device (or measure) inspection, high-temperature protection inspection, manual emergency stop device (or emergency switch) function inspection, interlocking function inspection of connection with aircraft electrical system, and overspeed protection function inspection. These new items reflect the standard's targeted improvements in mechanical strength, personnel safety, and special application scenarios (such as airport power supply).
Test Method Classification Framework
The new standard divides test methods into 11 series, covering the entire lifecycle testing needs from basic insulation to reliability and maintainability. The specific classification is shown in the table below:
| Series Number | Category Name | Examples of Typical Items |
|---|---|---|
| 100 | Insulation Performance | Insulation Resistance Measurement, Withstand Voltage Test |
| 200 | Component Performance | Appearance Inspection, Quality Measurement, Start-up Performance, Automatic Control Function Inspection |
| 300 | Protection Function | Short Circuit Protection, Overload Protection, Reverse Power Protection, Overspeed Protection, etc. |
| 400 | Performance Indicators | Frequency Drop, Steady-State Voltage Deviation, Transient Characteristics, Harmonic Measurement, etc. |
| 500 | Safety Performance | Insulation Monitoring, Grounding Resistance, Phase Sequence Check |
| 600 | Radio Interference | Conducted Interference, Radiated Interference Measurement |
| 700 | Environmental Protection | Vibration, Noise, Hazardous Substance Concentration, Smoke Measurement |
| 800 | Economic Performance | Fuel Consumption Rate, Oil Consumption Rate Measurement |
| 900 | Environmental Adaptability | High and Low Temperature Test, Damp Heat Test, Mold Test, Rain Test, Tilt Operation Test |
| 1000 | Transportability | Transportation Test, Driving Test |
| 1100 | Reliability and Maintainability | Constant Load/Alternating Load Test, Unattended Time Inspection |
Key New Item Interpretation
Drop Test (Method 218) Applicable to small-power power stations that can be moved by two people. The mechanical strength of components is assessed through a free-fall test, where the component is dropped once from a height of 20cm at an arbitrary angle onto a concrete surface to check structural integrity. This test simulates an accidental fall during handling and is particularly important for portable power stations.
Safety Device Inspection (Method 219) requires checking whether moving parts such as fans, flywheels, engine-generator connections, air inlets/outlets, and high-pressure oil pump drive ends are equipped with protective covers or nets to prevent personnel from coming into contact with them and causing injury. This reflects the ergonomic requirements of safety design.
High Temperature Protection Inspection (Method 220) focuses on high-temperature components such as exhaust pipes and turbochargers, requiring the use of isolation protection or warning signs to avoid burns. This new item reflects the importance attached to the occupational health of operators.
Functional Inspection of Manual Emergency Stop Device (or Emergency Switch) (Method 221) requires that a conspicuous emergency stop button be set on the control panel, and that it be verified that it can immediately cut off fuel and electrical circuits during operation to ensure rapid power cut-off in emergencies.
Functional Inspection of Manual Emergency Stop Device (or Emergency Switch) (Method 221) requires that a conspicuous emergency stop button be set on the control panel, and that it be verified that it can immediately cut off fuel and electrical circuits during operation to ensure rapid power cut-off in emergencies.
Interlock Function Check for Connection to Aircraft Electrical System (Method 222) For airport power vehicles, by simulating aircraft interlock signals, ensure that the output switch can only be closed after the correct signal, preventing accidental power supply. This addition adapts to the special safety requirements of aviation ground support power supply.
Overspeed Protection Function Check (Method 310) By adjusting the speed to the protection limit, verify the action time and shutdown function of the protection device to prevent runaway accidents. Previously, the standard only covered over-frequency/under-frequency protection; overspeed protection as an independent item improves the engine safety margin.
Implementation Recommendations
In response to the changes in the new standard, enterprises should take the following measures:
- Equipment Update: Equip with instruments that match the new test items, such as drop test benches, noise meters, smoke meters, harmonic analyzers, etc., and ensure that the accuracy of the measuring instruments meets the requirements.
- Equipment Update **Procedure Revision:** The original test outline was revised, clarifying the operational procedures, judgment criteria, and record forms for newly added items, especially protection checks and interlock function tests. **Personnel Training:** Test personnel were organized to learn about the changes in the new standards, focusing on mastering simulation methods and risk control for safety-related tests, such as paying attention to engine safety during overspeed protection testing. **Design and Verification:** Drop strength, protective cover design, and high-temperature isolation measures were considered during the product development stage to avoid failure to pass type testing after prototype production. **Reliability Improvement:** Alternating load tests and unattended verification were conducted according to the 1100 series methods, fault data was collected, and the mean time between failures (MTBF) and mean time to repair (MTTR) were optimized.
Conclusion
The release and implementation of GB/T 20136—2025 marks a significant step forward for my country's internal combustion engine power plant testing methods, moving towards a more comprehensive, safer, and more reliable direction. Enterprises should actively implement the new standard, using it as a crucial tool to improve product quality and market competitiveness. By strictly adhering to the testing methods, not only can power plant performance be guaranteed to meet standards, but operational risks can also be effectively reduced, promoting high-quality development in the industry.