Line Isolation Monitor Testing Equipment

Testing equipment for line isolation monitors.

Line isolation monitor testing equipment.

Line isolation monitor testing. The nfpa required annual testing and logging of these lims instead of monthly. Lim testing isolated power systems equipment. The bender lt3000 line isolation monitor lim and gfci tester plugs into any wall outlet up to 240 v 50 or 60 hz.

The 1996 edition of nfpa changed the code to allow for self testing self calibrating line isolation monitors. This was a cost saving. Nfpa 99 6 3 3 3 2 says the line isolation monitor lim circuit shall be tested after installation and prior to being placed in service by successively grounding each line of the energized distribution system through a resistor whose value is 200 x v ohms where v equals measured line voltage. The lt3000 is an effective and versatile testing instrument for easily fufilling these requirements.

Nfpa 99 requires that line isolation monitor lim and ground fault circuit interrupter gfci tests be conducted at regular intervals. A lim provides both visual and audible alarm signals to alert medical staff of the presence of a line to ground fault on connected equipment. Additionally this resulted in better monitoring of the operating room s electrical system. In the standard view the lcd display shows the system voltage.

Line isolation monitors are continually operating and indicate possible leakage or fault currents from isolated conductor to ground. Testing isolation in emergency rooms is mandatory.