PT877D-1X5，PT877D-1X6，PT877D-1X7，PT877D-1X8，PT877D-2X1，有功電能數顯表
PT877D-2X2，PT877D-2X3，PT877D-2X4，PT877D-2X5，
PT877D-2X6，PT877D-2X7，PT877D-2X8，PT877D-3X1，
PT877D-3X2，PT877D-3X3，PT877D-3X4，PT877D-3X5，
PT877D-3X6，PT877D-3X7，PT877D-3X8，