PT877A-1X1，PT877A-1X2，PT877A-1X3，PT877A-1X4，PT877A-1X5，有功電能數顯表
PT877A-1X6，PT877A-1X7，PT877A-1X8，PT877A-2X1，
PT877A-2X2，PT877A-2X3，PT877A-2X4，PT877A-2X5，
PT877A-2X6，PT877A-2X7，PT877A-2X8，PT877A-3X1，
PT877A-3X2，PT877A-3X3，PT877A-3X4，