JB/T 51095-1999

Manufacturers and quality inspection agencies of tractors, agricultural transport vehicles, and construction machinery use this standard to grade and evaluate the quality of switches. It helps ensure the reliability and consistency of switch products by setting clear indicators for qualified, first-class, and premium grades. This standard is crucial for improving the overall quality and safety of tractor electrical systems.

拖拉机、农用运输车和工程机械的制造商和质检机构使用本标准来对开关产品进行质量分等和等级评定。它通过设定合格品、一等品和优等品的明确指标，帮助确保开关产品的可靠性和一致性。该标准对于提升拖拉机电气系统的整体质量和安全性至关重要。

This standard specifies product quality grading indicators, test methods, and inspection rules for tractor switches, applicable to quality inspection and grade evaluation of switches for tractors, agricultural transport vehicles, and construction machinery. It classifies switches into three grades: qualified, first-class, and premium, and details performance indicators such as contact voltage drop, gear shifting, dielectric strength, and durability, as well as environmental adaptability tests including high temperature, low temperature, vibration, and damp heat. Inspection rules adopt sampling plans and evaluate based on defect classification.

本标准规定了拖拉机用开关的产品质量分等指标、试验方法和检验规则，适用于拖拉机、农用运输车及工程机械的开关质量检测与等级评定。标准将开关分为合格品、一等品和优等品三个等级，并详细规定了触点压降、档位转换、绝缘介电强度、耐久性等性能指标，以及高温、低温、振动、湿热等环境适应性试验要求。检验规则采用抽样方案，按缺陷分类进行评定。