FAI32 号 RHR 泵断路器在试验中拒绝断开（枢轴连接缺润滑），导致 480V 安全母线 6A 被判不可用，进而三台 EDG 被判不可用，机组进入冷停堆
断路器机构关键枢轴连接缺乏润滑导致卡涩拒动；同类 DS-416 断路器存在潜在共因退化
The mechanism code FAI shown on this card is the KB's internal damage-mechanism abbreviation (not an ISO 14224 code); it describes how the equipment failed. The 'ISO 14224 Mapping' block above maps it to the correct ISO functional failure code (which describes what the equipment failed to do) — these are two distinct dimensions in ISO 14224. The mechanism follows the narrative in the card body.
winding_insulation_thermal_aging内部故障产气（匝间/饼间短路，DGA 异常） dissolved_gas_fault套管闪络/渗漏 bushing_flashover有载分接开关触头磨损/卡涩 oltc_contact_wear_sticking冷却器/油泵/风扇失效 cooling_system_failure铁芯多点接地/过热 core_ground_fault_hotspot绝缘油劣化/受潮 oil_degradation_moisture分接开关切换油室燃弧/爆裂 tap_diverter_arc绕组机械位移/变形（短路电动力） winding_mechanical_displacement储油柜/呼吸器堵塞 conservator_breather_blockage温度指示/保护误动拒动（WTI/OTI） temperature_indicator_failure瓦斯继电器误动/渗漏 buchholz_relay_nuisance突发短路耐受失败 short_circuit_withstand_failure异常噪声/振动（铁芯松动） noise_vibration_abnormal套管接线端/引线连接过热 terminal_connection_overheat断路器拒动 breaker_fail_to_trip断路器误动跳 breaker_spurious_trip母排连接点过热 busbar_overheating局部放电 partial_discharge操动机构卡涩 breaker_mechanism_jam电流互感器/电压互感器故障 ct_pt_failure保护装置失效 protection_relay_failure内部电弧故障 arc_flash_event绝缘老化 insulation_degradation控制电源丧失 control_power_loss接地/二次回路接地不良 grounding_fault在线测温装置失效 thermal_monitoring_failure柜体腐蚀(危险区域) enclosure_corrosion通信中断 communication_loss蓄电池单体容量衰减 battery_cell_degradation蓄电池热失控 battery_thermal_runaway逆变器故障 inverter_fault整流器故障 rectifier_fault静态开关失效 static_switch_fail控制板/固件故障 control_board_fault冷却风扇失效 cooling_fan_failure输入浪涌/电压骤降 input_surge输出过载跳闸 output_overload蓄电池后备时间不足 battery_capacity_loss手动/自动旁路故障 bypass_path_failure通信中断 ups_communication_loss