NK AG3-SDT-120-LA-LC - Ground Fault Sensor, AG-LC Series; 300-1500 mA

• NK AG-LC series
• Ground fault sensor - Large solid-core
• Range = 300-1500 mA
• Output Type = Single pole, double throw relay
• Power Supply = 120 VAC
• Contact Action = Latching normally de-energized

AG-LC series ground fault sensors are the latest design innovation from NK Technologies. The 2011 NEC added section 555.3 to require ground fault protection of the main over current device feeding marinas and boat yards. These services are often carrying up to 800 amps; most sensor designs will not allow the conductors to pass through a single sensing ring. By designing a sensor in a large solid-core housing, the conductors will not have to be passed through a separate sensing device like a zero-sequence current transformer. This design makes monitoring of larger circuits a breeze, whether to protect boaters or large equipment like amusement park rides or gantry cranes.

Sense Current to Earth in Marinas

Equipment on board a vessel can pass current to earth through water, causing a dangerous condition to swimmers and boaters in fresh water marinas and boat docking facilities. Use a ground fault sensor with a shunt trip breaker to shut off the power when excessive current flows to earth.

Ground Fault Sensor Applications

Monitor Large Machines

• Detect leakage to earth before the problem can cause damage.

Water Delivery and Treatment

• Keep pumping systems safe and in operation.
• Sense faulting stator windings prior to failure.

Generators

• Shut down equipment when leakage current exceeds hazardous levels.

Ground Fault Sensor Features

Electromechanical Relay Output

• Provides both normally open and normally closed contacts.
• Compatible with most automation and control systems.

Externally Powered

• A choice of fail-safe or standard operation.

Simple Field Setpoint Adjustment

• Single turn potentiometer with setpoint shown on label.
• Adjustable delay to mask out nuisance fault current.

Large Solid-Core Case

• Large sensing window provides ample space for multiple conductors.

DIN Rail Mount

• Simple snap onto DIN rail or attach with screws to a panel for secure mounting.

UL/cUL Approved, CE Pending

• Accepted around the world.
• Conformally coated circuit boards standard.

Ground Fault Sensor Connections

Output Contact Action