双电源切换装置从产品结构、性能及所遵循的标准三个方面，分别将CB级与PC级双电源切换装置；PC级双电源切换装置与刀开关（电动）进行对比和分析。
从中不难发现，PC级双电源切换装置是理想的双电源切换开关。
两者机械设计理念不同
CB级是由断路器组成，而断路器是以分断电弧为已任，要求它的机械应快速脱扣。因而断路器的机构存在滑扣、再扣问题；而PC级产品不存在该方面问题。PC级产品的可靠性远高于CB级产品。
YSD-PA4H4P210A,YSD-PA4H4P210B,YSD-PA4H4P210C,YSD-PA4H4P210D,YSD-PA4H4P210E,
YSD-FV4H1P37A,YSD-FV4H1P37B,YSD-FV4H1P37C,YSD-FV4H1P37D,YSD-FV4H1P37E,
WRRGN-4411G,WRRGN-4411S,WRRGN-4412G,WRRGN-4312S,
YBD-TCBBA4V3Y,YBD-TCBBA4YD,YBD-TCBBA4YA2,YBD-TCBBA4YA1,YBD-TCBBA4YD2, 热电偶温度变送器
YSD-NV0R4Y7A,YSD-NV0R4Y7B,YSD-NV0R4Y7C,YSD-NV0R4Y7D,YSD-NV0R4Y7E,
YQH33A5YPA2,YQH33A5YPA1,YQH33A5YPD2,YQH33A5YPD1,YQH33A5YPD,YQH33A5YPY,
YBDFV5V3VEA4D,YBDFV5V3VEA4A2,YBDFV5V3VEA4A1,YBDFV5V3VEA4D2,YBDFV5V3VEA4D1,
CW-XMT-535-3Z,CW-XMT-535-3Y,CW-XMT-535-4M,CW-XMT-535-4SM,CW-XMT-535-4F,CW-XMT-535-4X,CW-XMT-535-4Z,
YWA33A1V5W6A2,YWA33A1V5W6A1,YWA33A1V5W6D2,YWA33A1V5W6D1,YWA33A1V5W6D,YWA33A1V5W6Y,
WSSNE-513LW,WSSNE-513F,WSSNE-513FW,WSSNE-514N,WSSNE-514NW,WSSNE-514L,WSSNE-514LW,
XMF-PT100-250-M,XMF-PT100-251-M,XMF-PT100-252-M,XMF-PT100-253-M,
1151GP8M23,1151GP8M24,1151GP8M25,1151GP8M33,1151GP0M23,1151GP0M24,
XTMA-100-D,XTMA-102-D,XTMA-103-D,XTMA-104-D,XTMA-105-D,XTMA-106-D,智能数字显示调节仪
WRN-8426D,WRN-8427D,WRN-8428D,WRN-8429D,
WSSC-B414FW,WSSC-B415N,WSSC-B415NW,WSSC-B415L,WSSC-B415LW,WSSC-B415F,
TH-LCD-L801-01-V,TH-LCD-L801-01-W,TH-LCD-L801-01-G,TH-LCD-L801-01-O,TH-LCD-L801-01-E,
YSD-AV2H3Y8A,YSD-AV2H3Y8B,YSD-AV2H3Y8C,YSD-AV2H3Y8D,YSD-AV2H3Y8E,
XMTE212-C0,XMTE212-C3,XMTE212-C4,XMTE212-C5,XMTE212-C6,XMTE212-C7,XMTE212-C9,
WRPLN-1410N,WRPLN-1410G,WRPLN-1410C,WRPLN-1411N,WRPLN-1411G,WRPLN-1411C,
WREH-62414N,WREH-62414G,WREH-62414L,WREH-62414C,WREH-62415N,WREH-62415G,
WZG-241D,WZG-241A,WZG-242D,WZG-242A,WZG-251D,WZG-251A,WZG-252D,WZG-252A,
CW-PMC131AISPMM2,CW-PMC131AISPMM3,CW-PMC131AISPMLM,CW-PMC131AISPMQ,压力变送器
断路器不承载短路耐受电流，触头压力小供电电路发生短路时，当触头被斥开产生限流作用，从而分断短路电流；而PC级ATS应承受20Ie及以上过载电流。触头压力大不易被斥开，因而触头不易被熔焊。这一特性对消防供电系统尤为重要。
双电源在转换过程中存在电源叠加问题
PC级双电源切换装置充分考虑了这一因素。PC级ATS的电气间隙、爬电距离的180%、150%（标准要求）。因而PC级ATS**性更好。
双电源切换装置触头材料的选择角度不同
LSG13-3,液面放烟花蒸汽夹套接头
WSSNC-515FW,WSSNC-B400N,WSSNC-B400NW,WSSNC-B400L,WSSNC-B400LW,WSSNC-B400F,
YSD-VA4H2P34A,YSD-VA4H2P34B,YSD-VA4H2P34C,YSD-VA4H2P34D,YSD-VA4H2P34E,
CW-1151HP3S24E-M1,CW-1151HP3S24E-M2,CW-1151HP3S24F-J,CW-1151HP3S24F-s,
YBDTV6A4YND,YBDTV6A4YNA2,YBDTV6A4YNA1,YBDTV6A4YND2,YBDTV6A4YND1,
LSG11-6,表面热电偶连接头
UBG-2124,UBG-2126,
3351TG0SAM3B13I1,3351TG9SAM3B13I1,3351TG8SAM3B13I1,3351TG7SAM3B13I1,
WSSE-404L,WSSE-404LW,WSSE-404F,WSSE-404FW,WSSE-405N,WSSE-405NW,WSSE-405L,
YSU-424,YSU-425,YSU-426,YSU-524,YSU-525,YSU-526,YSU-624,YSU-625,YSU-626,
YBD-TCuAYA2D2,YBD-TCuAYA2D1,YBD-TCuAYA2Y,YBD-TCuAYA1D,YBD-TCuAYA1A2,
1151GP6E12,1151GP6E53,1151GP6E54,1151GP6E55,1151GP6E22,1151GP0S33,
WRE-8426I,WRE-8427I,WRE-8428I,WRE-8429I,
XMTA-7903,XMTA-7902,XMTA-7901,
LSG14-6,内外接头
WRQGN-2413G,WRQGN-2413S,WRQGN-2414G,WRQGN-2414S,
CW-BP2088AIIERM2,CW-BP2088AIIERM3,CW-BP2088AIIERZ,CW-BP2088AIIERQ,
YBD-TCSAV2YD1,YBD-TCSAV2YY,YBD-TCSAV3A4D,YBD-TCSAV3A4A2,YBD-TCSAV3A4A1,
WRNGN-3311G,WRNGN-3311S,WRNGN-3312G,WRNGN-3312S,
CW3351LT6SB0,CW3351LT6SB2,CW3351LT6SB4,CW3351LT6SB6,CW3351LT6SC0,
YWH33V22V0CA2,YWH33V22V0CA1,YWH33V22V0CD2,YWH33V22V0CD1,YWH33V22V0CD,YWH33V22V0CY,
WRNLN-1210N,WRNLN-1210G,WRNLN-1210C,WRNLN-1211N,WRNLN-1211G,WRNLN-1211C,循环硫化床锅炉专用热电偶
WZP-1212A,WZP2-1212A,WZP-1312A,WZP2-1312A,装配式铂电阻
CW-PMC131AIS0C1M2,CW-PMC131AIS0C1M3,CW-PMC131AIS0C1LM,CW-PMC131AIS0C1Q,
WRN-140A,WRN-240A,WRN-440A,WRN-640A,WRNK-140A,WRNK-240A,WRNK-440A,WRNK-640A,隔爆热电偶
YW12V1V1W1A2,YW12V1V1W1A1,YW12V1V1W1D2,YW12V1V1W1D1,YW12V1V1W1D,YW12V1V1W1Y,
WREK-841n﹡D,WREK-842n﹡D,隔爆型多对式热电偶
断路器常常选择银钨、银碳化钨材料配对，这有利于分断电弧。但该类触头材料易氧化，备用触头长期暴露在外，在其表现易形成阻碍导电、难驱除的氧化物，当备用触头一但投入使用，触头温升增高易造成开关烧毁甚至爆炸；而PC级ATS充分考虑了触头材料氧化带来的后果，尤其是日本共立的ATS其接点有硅合金制成，高度抗燃烧，而且当开关运行时，每一次接触自滑触点可以清理灰尘和氧化，这大大提高了ATS的使用寿命，降低了风险。
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