Off-site stray, or neutral-to-earth (NE), voltage can result from primary neutral currents, off-site faults, or marginal groundings. Ronk BLOCKER is designed to reduce the off-site contributions to the stray voltage, allowing the utility to focus on the on-site sources.
The device operates directly on the principle of magnetic saturation and does not depend on external controls or internal logic signals; therefore, it reacts instantaneously, providing immediate, continuous protection at all times.
|Series:||BLOCKER Stray Voltage Isolator|
|Blocking Volts:||11 V|
|Peak Current:||80,000 A|
|Peak RMS:||100 V|
|Weight:||14 lbs. (approx.)|
|Enclosure:||NEMA 3R aluminum|
BLOCKER is installed between the primary and secondary neutrals of the distribution transformer.
BLOCKER has a very low impedance (less than .5 Ohms) for a voltage level above 12 V. This provides the fault current path in the event of a primary to secondary short in the distribution transformer (with a 7,200 V primary, the voltage drop of 12 V across the BLOCKER is less than 0.2% and is, therefore, negligible).