Two base models are offered:
A ground fault relay, combined with a shunt trip circuit breaker provides a ground fault circuit interrupter (GFCI) solution that meets the intent of 2020 & 2023 National Electric Code (NEC) Article 210.8 (B) through (F), ground fault protection for branch circuits within wet locations. The system includes an AC ground fault relay that trips at 5 mA and separate circuit interrupter device.
A shunt trip breaker combined with a ground fault relay is a common configuration widely adopted across multiple market segments with decades of reliable operation. The GFCI solution is suitable for single or three-phase, 15 A to 100 A branch circuits and will protect against both overload current and ground fault currents greater than 5 mA.
A cost effective, compact ground fault circuit interrupter solution can be installed in, or adjacent to the existing panelboard. Depending on the relay used, the relay can be either panel mounted or DIN Rail mounted with easy installation and setup and is compatible across all OEM panel boards. The GFCI solution can service the NEC GFCI requirements for branch circuits, including:
Single phase 120 VAC to 240 VAC (30 A to 50 A)
3-Phase 208 VAC to 240 VAC (15 A to 100 A)
Our Ground Fault Relay Selection Guide provides additional guidance.
When a ground fault current exceeds 5 mA, the NK Technologies AGU or AGL ground fault relay will respond “within an established period of time” (refer to Figure 2). When the circuit interrupter (CI) receives a fault signal from the relay, it will de-energize the branch circuit or portion thereof.
When a shunt trip breaker is manually reset and the ground fault current incidence has not been cleared, then the ground fault relay will command the CI to again de-energize the branch circuit.
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Here is what Engineers have to say about our technical expertise...
“Changes to NEC 210.8 B-F have challenged all of us in the industry to find new GFCI solutions. When NK Technologies reached out to us recently, we decided to invest a few hours into meeting with their application experts. Five of our electrical engineering designers attended the session and considered it time well spent. NK Technologies has an in-depth understanding of the new NEC requirements and ground fault products designed to meet them. We are thankful for their time.”
PK Electrical
One of the top electrical and low voltage/communications design firms,
in both the private and public sectors, based in Reno, NV and Denver, CO.