描述
屏蔽地(AG,Analog Grounding)
也叫模拟地,它可以把现场信号传输时所受到的干扰屏蔽掉,以提高信号精度。DCS系统中信号电缆的屏蔽层应做屏蔽接地。线缆屏蔽层必须一端接地,防止形成闭合回路干扰。铠装电缆的金属铠不应作为屏蔽保护接地,必须是铜丝网或镀铝屏蔽层接地。接入公共接地极。
SQUARE D HVL LOAD CURRENT INTERRUPTER SWITCH, NEW
SQUARE D HVL LOAD CURRENT INTERRUPTER SWITCH, NEW
SQUARE D AT7000 TFRC ReatiVar POWER FACTOR CAPACITOR
ROBINSON EB124A 40½” INDUSTRIAL BLOWER, NEW
FALK 2080Y-L ENCLOSED GEAR DRIVE, NNB
FALK 2070Y3-B ENCLOSED GEAR DRIVE
FALK 2080Y3-L ENCLOSED GEAR DRIVE, REMAN