The Tektronix A6901 Ground Isolation Monitor connects between mains power and test equipment without connecting protective ground, in order to safely allow referencing measurements to a low voltage instead of ground, or break ground loops.
It monitors the floating equipment ground voltage. If the voltage exceeds 40 V peak, or ground current exceeds a selectable limit of 0.5, 3.5 or 5 mA, the A6901 disconnects mains power and grounds the test equipment.
|DC trip voltage||28 VRMS (40 V peak) or ±40 V DC|
|Current trip||±0.5 mA, ±3.5 mA and ±5 mA max. selectable|
|Trip delay||<200 ms|
|Line voltage||90-128 V; 180-250 V; 48-66 Hz|
|Load power||500 W max.|