Line Isolation Monitor Testing Equipment

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.

Line isolation monitor testing equipment. Line isolation monitors are continually operating and indicate possible leakage or fault currents from isolated conductor to ground. Additionally this resulted in better monitoring of the operating room s electrical system. The lt3000 is an effective and versatile testing instrument for easily fufilling these requirements. The bender lt3000 line isolation monitor lim and gfci tester plugs into any wall outlet up to 240 v 50 or 60 hz.

The nfpa required annual testing and logging of these lims instead of monthly. Testing isolation in emergency rooms is mandatory. A simple pretest confirms the integrity of the isolated power system and to ensure that the system is properly grounded. 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.

Line isolation monitor testing. The 1996 edition of nfpa changed the code to allow for self testing self calibrating line isolation monitors. The line isolation monitor lim continuously monitors the total hazard current thc of an isolated power system in the healthcare industry. Nfpa 99 requires that line isolation monitor lim and ground fault circuit interrupter gfci tests be conducted at regular intervals.

In the standard view the lcd display shows the system voltage. Health care facilities insist on lim line isolation monitor testing to ensure the safety of their patients.