Sales: 1-800-221-7665
Service: 1-217-563-8333
Sales: 1-800-221-7665
Service: 1-217-563-8333
Stray Voltage Isolator – BLOCKER
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.
Tech Spec | Installation Instructions | Stray Voltage Investigation
| Model: | SVI-50 22V |
| Series: | BLOCKER Stray Voltage Isolator |
| Blocking Volts: | 22 V |
| Energy: | 6,000 Joules |
| Impedance: | 0.01% |
| Peak Current: | 50,000 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).
Toll Free: 1-800-221-7665
Phone: 1-217-563-8333
Fax: 217-563-8336
