PA30B放大器测试和出厂验收报告

./RTDS数字仿真专用功率放大器测试及检验报告北京博电新力电气股份有限公司目录系统组成功能检查检测用仪器设备绝缘测试参数定义PA30B数字仿真功率放大器技术参数测试增益、线性度、负载稳定度、总谐波失真、最大输出功率、幅频特性、输入输出延时、阶跃响应、系统相位结论系统组成名称主要参数出厂编号机柜1600<H>×800<D>×600<W>PAP-02电源缺相报警器输入380V、三相四线50Hz、20A/相容量S/N:81120505PA30B功放3x30A电流400VA4A/V4x120V电压60VA20V/VS/N:99120504S/N:99120512S/N:99120501S/N:99120511PAT-01控制组件S/N:931205012.功能检查名称/型号出厂编号功能检查结果机柜外观,结构√配电输出√PAP-02电源缺相报警器S/N：81120505缺相报警√PA30B功率放大器S/N:99120504S/N:99120512S/N:99120501S/N:99120511接点信号输出√控制信号输入√电流增益：4A/V√电压增益：20V/V√高功率切换√暂停<Pause>控制√电压短路报警√电流开路指示√高速风冷控制√过热保护报警√输出电压、电流显示√状态指示灯显示√过热保护报警√暂停控制√输出电压电流显示√控制组件PAT-01S/N:93120501总急停<STOP>√低通投入<LPT>√输出时限<Timelimit>√电流反时限1档≥6s√电流反时限2档≥12s√电流反时限3档≥18s√时限起始1ACT/5ACT√关时限OFF√校验信号Test√合格√不合格×3.检测用仪器设备型号/名称生产厂商精度指标测试/用途KEITHLEY2000型高精度多用表美国KEITHLEY.CO直流电压0.002%直流电流0.02%交流电压0.05%交流电流0.1%交、直流电流、电压精度幅频特性频率精度测试HL23/9型高精度电流互感器上海互感器厂0.05%0~100A交流大电流测试TekTHS710高级数字存储示波器美国Tektronix60MHzDigitalRealTime250MS/s响应速度测试动作时间测试TEKA622高频电流探头美国TektronixDC~100KHz0~100A电流响应速度测试HIOKI3166三相电力参数分析仪日本HIOKI1~40次谐波0~500A,0~600V0.2%谐波失真测试谐波含量测试704-3型相位频率计XX电力自动化设备厂0.1度电压、电流相位测试FLUKE45/CH多用表美国FLUKE0.5%0~10A直流电流检测CD2671工频耐高压实验仪中国XX长江无线电厂0～4KV电源与机壳绝缘测试ZC-7500V摇表ZC-25B-41000V北京远东仪表有限公司500V0~500M1000V0~1000M输出端与机壳、开关量之间绝缘检查调压器TZ12/250V北京调压器厂0~250V5KVA调节电源电压可调电阻上海0~500Ω1A0~4Ω20A0~5Ω30A负载4.绝缘检查〔实验时机壳可靠接地4.1电源输入端:对机壳1.5KVAC50Hz1min5mA〔打开电源开关,输出端控制端短接1000V/1000M摇表绝缘电阻大于800M名称/型号出厂编号检查项目检查结果PAP-02电源缺相报警器S/N：81120505输入端短接对地√PA30B电流、电压放大器S/N：99120504输入端短接对地√PA30B电流、电压放大器S/N：99120512输入端短接对地√PA30B电流、电压放大器S/N：99120501输入端短接对地√PA30B电流、电压放大器S/N：99120511输入端短接对地√PAT01控制组件S/N：93120501输入端短接对地√4.2输出端:500V/500M摇表绝缘电阻大于300M名称/型号出厂编号检查项目检查结果PA30B电流、电压放大器S/N：99120504输出端短接对地√PA30B电流、电压放大器S/N：99120512输出端短接对地√PA30B电流、电压放大器S/N：99120501输出端短接对地√PA30B电流、电压放大器S/N：99120511输出端短接对地√合格√不合格×5．参数定义〔以下电流电压值如不特殊注明均为有效值5．1输出计算值:输入信号有效值×增益值例如：1.0V×4.0A/V=4.0A1.0V×20.0V/V=20.0V5．2输出实测值：实际输出有效值5．3相对误差：5．4线性度：5．5电流放大器负载稳定性：负载电阻≈0欧时,输出电流I1负载电阻≈最大负载时,输出电流I25．6电压放大器负载稳定性：空载电压U150%额定负载U25．7输入输出延时:指输入方波信号与输出方波信号上升沿的50％幅度之间的延时5．8放大器阶跃响应：上升沿10％至90％的时间或下降沿90％至10%的时间中较大者。6.PA30B数字仿真功率放大器技术参数测试6.1出厂编号：99120504温度：25℃±5℃相对湿度：20%RH—85%RH6．1．1电流放大器技术参数测试6．1．1．1项目：增益、线性度、最大输出值、负载稳定性、失调电流输出通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ia计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200170.400302.00014.002812.00120.00930.0270.090.3相对误差％0.060.080.010.070.010.040.090.04注:通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ib计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200120.400211.99954.001711.99820.00530.0210.090.3相对误差％0.060.05-0.030.04-0.020.020.070.05注:通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ic计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200130.400221.99964.001711.99820.00530.0200.080.4相对误差％0.060.06-0.020.04-0.020.030.070.05注:6．1．1．2项目：总谐波失真输出电流1.0A10.0A20.0A30.0AIaTHD%0.29%0.07%0.04%0.04%IbTHD%0.30%0.07%0.04%0.03%IcTHD%0.30%0.06%0.04%0.04%注：6．1．1．3项目：最大输出功率通道输出电流THD≈1%时最大输出功率<VA>正常高功率Ia5.0A≥54≥9020.0A≥180≥32030.0A≥240≥420Ib5.0A≥54≥9020.0A≥180≥32030.0A≥240≥420Ic5.0A≥54≥9020.0A≥180≥32030.0A≥240≥4206．1．1．4项目:幅频特性、输入输出延时、阶跃响应通道频率Hz20.050.0100.01K5KIa2.0A输出电流<A>2.00081.99982.00051.99861.9959输入输出延时<μs>≤8.05.0A输出〔50Hz阶跃响应<μs>≤6.8Ib2.0A输出电流<A>2.00071.99932.00041.99821.9958输入输出延时<μs>≤8.05.0A输出〔50Hz阶跃响应<μs>≤6.8Ic2.0A输出电流<A>2.00081.99962.00081.99851.9961输入输出延时<μs>≤8.05.0A输出〔50Hz阶跃响应<μs>≤6.86．1．2电压放大器技术参数测试6．1．2．1项目：增益、线性度、最大值、负载稳定度、失调电压输出通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Ua20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00022.000510.00219.99860.009120.030.020.3相对误差%0.020.030.02-0.010.010.030.02通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Ub20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00012.000110.00119.99760.002120.030.03-0.4相对误差%0.010.010.01-0.020.010.030.03通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Uc20V/V计算值1.002.0010.0020.0060.00120.00实测值0.99991.99999.999619.99559.997120.020.02-0.2相对误差%-0.01-0.01-0.01-0.03-0.010.020.03通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Uz20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00052.000610.00420.00360.021120.060.020.5相对误差%0.050.030.020.020.040.050.026．1．2．2项目：总谐波失真、最大输出功率通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Ua20V/VTHD%0.09%0.04%0.03%0.02%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Ub20V/VTHD%0.10%0.05%0.03%0.02%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Uc20V/VTHD%0.11%0.05%0.04%0.03%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Uz20V/VTHD%0.10%0.05%0.04%0.03%≥626．1．2．3项目：幅频特性、输入输出延时、阶跃响应通道频率Hz20501001K5KUa30V输出电压<v>30.00830.00529.99529.99229.723输入输出延时<μs>≤6.457V输出〔50Hz阶跃响应<μs>≤9.2Ub30V输出电压<v>30.00630.00129.99429.99129.765输入输出延时<μs>≤6.457V输出〔50Hz阶跃响应<μs>≤9.6Uc30V输出电压<v>30.00229.99829.99629.98729.763输入输出延时<μs>≤6.457V输出〔50Hz阶跃响应<μs>≤9.0Uz30V输出电压<v>30.01330.00830.00229.99529.760输入输出延时<μs>≤6.457V输出〔50Hz阶跃响应<μs>≤9.66．1．3系统相位精度Ua为基准0°30°90°120°最大误差<°>Ua—————Ub-0.0129.9989.99119.990.01Uc-0.0129.9989.99119.990.01Uz-0.0129.9989.99119.990.01Ia-0.0229.9889.98119.980.02Ib-0.0229.9989.99119.990.02Ic-0.0229.9989.99119.990.02注：Ua为基准、相位为0°,输出电压57.7V、电流5.0A6．2出厂编号：99120512温度：25℃±5℃相对湿度：20%RH—85%RH6．2．1电流放大器技术参数测试6．2．1．1项目：增益、线性度、最大输出值、负载稳定性、失调电流输出通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ia计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200040.399991.99913.999712.00419.99730.0310.150.2相对误差％0.02-0.01-0.05-0.010.03-0.020.100.08注:通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ib计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.199970.400021.99933.999512.00619.99930.0350.150.3相对误差％-0.020.01-0.04-0.020.05-0.010.110.08注:通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ic计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200010.400011.99963.999912.00519.99830.0320.120.1相对误差％0.010.01-0.02-0.010.04-0.010.110.07注:6．2．1．2项目：总谐波失真输出电流1.0A10.0A20.0A30.0AIaTHD%0.32%0.05%0.04%0.03%IbTHD%0.30%0.05%0.04%0.03%IcTHD%0.31%0.07%0.04%0.03%注：6．2．1．3项目：最大输出功率通道输出电流THD≈1%时最大输出功率<VA>正常高功率Ia5.0A≥54≥9020.0A≥180≥32030.0A≥240≥420Ib5.0A≥54≥9020.0A≥180≥32030.0A≥240≥420Ic5.0A≥54≥9020.0A≥180≥32030.0A≥240≥4206．2．1．4项目:幅频特性、输入输出延时、阶跃响应通道频率Hz20.050.0100.01K5KIa2.0A输出电流<A>1.99961.99911.99851.99841.9935输入输出延时<μs>≤8.45.0A输出〔50Hz阶跃响应<μs>≤6.8Ib2.0A输出电流<A>1.99961.99931.99891.99861.9934输入输出延时<μs>≤8.45.0A输出〔50Hz阶跃响应<μs>≤6.8Ic2.0A输出电流<A>2.00021.99961.99921.99771.9928输入输出延时<μs>≤8.45.0A输出〔50Hz阶跃响应<μs>≤6.86．2．2电压放大器技术参数测试6．2．2．1项目：增益、线性度、最大值、负载稳定度、失调电压输出通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Ua20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00052.000910.00220.00560.029120.060.050.1相对误差%0.050.030.020.030.050.050.03通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Ub20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00042.001110.00519.99960.021120.040.06-0.2相对误差%0.040.050.050.010.040.030.02通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Uc20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00052.000510.00620.00460.027120.050.080.4相对误差%0.050.030.060.020.040.040.03通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Uz20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00012.000910.00520.00160.028120.060.07-0.4相对误差%0.010.050.050.010.050.050.036．2．2．2项目：总谐波失真、最大输出功率通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Ua20V/VTHD%0.11%0.05%0.03%0.02%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Ub20V/VTHD%0.12%0.04%0.03%0.02%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Uc20V/VTHD%0.11%0.05%0.03%0.03%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Uz20V/VTHD%0.12%0.05%0.04%0.03%≥626．2．2．3项目：幅频特性、输入输出延时、阶跃响应通道频率Hz20501001K5KUa30V输出电压<v>30.00430.01229.99929.99329.758输入输出延时<μs>≤6.057V输出〔50Hz阶跃响应<μs>≤9.6Ub30V输出电压<v>30.00530.01129.99729.99129.765输入输出延时<μs>≤6.057V输出〔50Hz阶跃响应<μs>≤9.7Uc30V输出电压<v>30.00730.01430.00129.99429.755输入输出延时<μs>≤6.057V输出〔50Hz阶跃响应<μs>≤9.1Uz30V输出电压<v>30.00530.01129.99129.99029.749输入输出延时<μs>≤6.057V输出〔50Hz阶跃响应<μs>≤9.26．2．3系统相位精度Ua为基准0°30°90°120°最大误差<°>Ua—————Ub0.01°30.01°89.99°120.01°0.01°Uc0.01°30.01°89.99°120.01°0.01°Uz0.01°30.01°90.01°120.01°0.01°Ia-0.01°29.99°89.99°119.98°0.02°Ib-0.02°30.01°89.99°119.98°0.02°Ic-0.03°29.98°89.98°119.99°0.02°注：Ua为基准、相位为0°,输出电压57.7V、电流5.0A6．3出厂编号：99120501温度：25℃±5℃相对湿度：20%RH—85%RH6．3．1电流放大器技术参数测试6．3．1．1项目：增益、线性度、最大输出值、负载稳定性、失调电流输出通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ia计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200040.400071.99984.000912.00520.01130.0310.140.2相对误差％0.020.02-0.010.030.040.060.110.06注:通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ib计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200010.400041.99954.000512.00320.00930.0290.150.4相对误差％0.010.01-0.030.010.020.040.100.07注:通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ic计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200030.400061.99974.000812.00420.01030.0250.150.5相对误差％0.020.02-0.020.020.030.050.080.05注:6．3．1．2项目：总谐波失真输出电流1.0A10.0A20.0A30.0AIaTHD%0.31%0.08%0.04%0.03%IbTHD%0.30%0.07%0.04%0.03%IcTHD%0.29%0.08%0.04%0.03%注：6．3．1．3项目：最大输出功率通道输出电流THD≈1%时最大输出功率<VA>正常高功率Ia5.0A≥54≥9020.0A≥180≥32030.0A≥240≥420Ib5.0A≥54≥9020.0A≥180≥32030.0A≥240≥420Ic5.0A≥54≥9020.0A≥180≥32030.0A≥240≥4206．3．1．4项目:幅频特性、输入输出延时、阶跃响应通道频率Hz20.050.0100.01K5KIa2.0A输出电流<A>2.00051.99961.99931.99861.9932输入输出延时<μs>≤8.85.0A输出〔50Hz阶跃响应<μs>≤6.9Ib2.0A输出电流<A>2.00031.99941.99921.99821.9935输入输出延时<μs>≤8.85.0A输出〔50Hz阶跃响应<μs>≤6.7Ic2.0A输出电流<A>1.99961.99901.99851.99761.9921输入输出延时<μs>≤8.85.0A输出〔50Hz阶跃响应<μs>≤7.16．3．2电压放大器技术参数测试6．3．2．1项目：增益、线性度、最大值、负载稳定度、失调电压输出通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Ua20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00031.99989.998819.98860.010120.010.030.5相对误差%0.03-0.01-0.02-0.00.020.010.04通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Ub20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00022.00029.999419.98960.014120.030.04-0.4相对误差%0.020.01-0.01-0.050.030.030.04通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Uc20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00032.000510.00119.99260.018120.030.040.4相对误差%0.030.030.01-0.040.030.020.04通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Uz20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00042.00029.999819.99060.017120.020.04-0.3相对误差%0.040.01-0.01-0.050.030.020.046．3．2．2项目：总谐波失真、最大输出功率通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Ua20V/VTHD%0.11%0.05%0.03%0.02%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Ub20V/VTHD%0.11%0.06%0.04%0.02%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Uc20V/VTHD%0.10%0.05%0.04%0.02%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Uz20V/VTHD%0.12%0.05%0.04%0.02%≥626．3．2．3项目：幅频特性、输入输出延时、阶跃响应通道频率Hz20501001K5KUa30V输出电压<v>30.00530.00229.99829.99229.756输入输出延时<μs>≤5.857V输出〔50Hz阶跃响应<μs>≤9.6Ub30V输出电压<v>30.00430.00129.99229.99329.770输入输出延时<μs>≤5.857V输出〔50Hz阶跃响应<μs>≤9.6Uc30V输出电压<v>30.00830.00630.00129.99529.754输入输出延时<μs>≤5.857V输出〔50Hz阶跃响应<μs>≤9.6Uz30V输出电压<v>30.00430.00129.99129.99329.745输入输出延时<μs>≤5.857V输出〔50Hz阶跃响应<μs>≤9.66．3．3系统相位精度Ua为基准0°30°90°120°最大误差<°>Ua—————Ub-0.01°29.98°89.99°119.99°0.02°Uc-0.01°29.99°89.99°119.99°0.01°Uz-0.01°29.99°89.98°119.99°0.02°Ia-0.02°29.98°89.99°119.98°0.02°Ib-0.02°29.98°89.98°119.98°0.02°Ic-0.02°29.98°89.98°119.98°0.02°注：Ua为基准、相位为0°,输出电压57.7V、电流5.0A6．4出厂编号：99120511温度：25℃±5℃相对湿度：20%RH—85%RH6．4．1电流放大器技术参数测试6．4．1．1项目：增益、线性度、最大输出值、负载稳定性、失调电流输出通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ia计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200160.400191.99984.002011.99620.00130.0200.15-0.6相对误差％0.080.05-0.010.05-0.030.010.070.05注:通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ib计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200150.400181.99974.001811.99519.99930.0130.13-0.3相对误差％0.070.04-0.010.04-0.04-0.010.040.06注:通道输入值Vin<v>0.050.100.501.003.005.007.50线性度负载稳定性失调<mA>Ic计算值<A>0.200.402.004.0012.0020.0030.00实测值<A>0.200140.400161.99954.001311.99419.99830.0150.12-0.4相对误差％0.070.04-0.020.03-0.05-0.010.050.05注:6．4．1．2项目：总谐波失真输出电流1.0A10.0A20.0A30.0AIaTHD%0.30%0.08%0.03%0.03%IbTHD%0.29%0.07%0.04%0.03%IcTHD%0.29%0.08%0.04%0.03%注：6．4．1．3项目：最大输出功率通道输出电流THD≈1%时最大输出功率<VA>正常高功率Ia5.0A≥54≥9020.0A≥180≥32030.0A≥240≥420Ib5.0A≥54≥9020.0A≥180≥32030.0A≥240≥420Ic5.0A≥54≥9020.0A≥180≥32030.0A≥240≥4206．4．1．4项目:幅频特性、输入输出延时、阶跃响应通道频率Hz20.050.0100.01K5KIa2.0A输出电流<A>2.00051.99961.99931.99861.9932输入输出延时<μs>≤9.25.0A输出〔50Hz阶跃响应<μs>≤5.6Ib2.0A输出电流<A>2.00031.99941.99921.99821.9935输入输出延时<μs>≤9.25.0A输出〔50Hz阶跃响应<μs>≤6.2Ic2.0A输出电流<A>1.99961.99901.99851.99761.9921输入输出延时<μs>≤9.25.0A输出〔50Hz阶跃响应<μs>≤6.46．4．2电压放大器技术参数测试6．4．2．1项目：增益、线性度、最大值、负载稳定度、失调电压输出通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Ua20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00062.000510.00319.99960.016120.040.050.5相对误差%0.060.030.03-0.010.030.030.04通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Ub20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00062.000510.00320.00160.019120.040.05-0.4相对误差%0.060.030.030.010.030.030.03通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Uc20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00022.000410.00220.00360.022120.070.040.4相对误差%0.020.020.020.010.040.060.03通道输入值Vin<V>0.050.100.501.003.006.00线性度负载稳定性失调<mv>Uz20V/V计算值1.002.0010.0020.0060.00120.00实测值1.00022.000410.00320.00360.022120.070.04-0.3相对误差%0.020.020.030.020.040.060.026．4．2．2项目：总谐波失真、最大输出功率通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Ua20V/VTHD%0.11%0.04%0.04%0.02%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Ub20V/VTHD%0.11%0.05%0.04%0.02%≥62通道输出电压20.0V50.0V70.0V120.0V最大输出功率<VA>Uc20V/VTHD%