Prevent AC current overload in equipment such as motors and heaters.

These relays sense current flowing through wires routed through the opening. If the current exceeds a set trip point, the relay trips and starts the adjustable delay timer. After the timer's cycle, the relay cuts power to the equipment to protect against overload. Once current drops below the trip point, the relay allows power to flow again to the equipment.

To determine the current trip range for more than one wire, divide the listed trip range by the number of wires passed through the opening.

Run current-carrying wires through these rings to monitor AC current flow.

Measure current without interrupting the circuit by connecting these test leads to a multimeter or current meter.

The connection end is a 4 mm banana plug, which is the standard for connecting to a multimeter or current meter.

These test leads step down the sensed current to a level that works with a multimeter or current meter—the signal reduction ratio is the factor by which they reduce current.

Check for the presence of AC current and voltage without making direct contact with a wire. The detector has light and sound alerts that indicate current when it is held near the electrical component.

Protect electrical equipment from overcurrent and undercurrent damage—these relays continuously monitor current flow. When current is outside a set range, they trip and cut power to prevent overheating, fire hazards, and stalling. Rated IP20, these relays have recessed terminals that keep fingers and other objects from touching live circuits. Mount them on a 35 mm DIN rail (also known as DIN 3 rail) for fast installation.

Ready to mount on DIN rail, these conditioners reduce high AC current, creating an output signal that can be used by panel monitors and other electrical measuring equipment.

They have true RMS sensing capability for accurate readings of the AC input current.

Measure current without interrupting the circuit by connecting these test leads to a multimeter or current meter.

The connection end is a 4 mm banana plug, which is the standard for connecting to a multimeter or current meter.

These test leads step down the sensed current to a level that works with a multimeter or current meter—the signal reduction ratio is the factor by which they reduce current.

Detect and mitigate ground faults to prevent harm to equipment, circuits, and people. These relays monitor the differential between incoming and outgoing current, also known as residual current. When the balance is off, they trip and cut power to the circuit. These relays are highly sensitive, so you can trust them to de-energize faulty circuits before a minor issue becomes a major one. Rated IP20, they have recessed terminals that keep fingers and other objects from touching live circuits. Mount them on 35 mm DIN rail (also known as DIN 3 rail) for fast installation.

These relays require a current-indicating ring (sold separately) to operate. Choose a ring that is large enough for your lines to pass through. Feed the lines of the circuit through the center of the ring and connect the indicating ring output to the relay.

Prevent changes in frequency from damaging sensitive equipment. Often used with motors, fluorescent lighting, and controllers, these relays cut power to your device if the frequency falls outside the set range. Switches on the front of these relays let you set your trip frequency and time. You can see that they're wired correctly and when they're actuated based on the LED indicators. Rated IP20, these relays have recessed terminals that keep fingers and other objects from touching live circuits.

Monitor phase, voltage, and frequency at the same time to protect motors, generators, and other three-phase circuits from burning out or overheating. They'll switch the circuit off if they detect voltage or frequencies outside of the set range or phase loss, imbalance, or reversal. Rated IP20, they have recessed terminals that keep fingers and other objects from touching live circuits. Mount them on a 35 mm DIN rail (also known as DIN 3 rail) for fast installation.

These relays use IO-Link, so they can be programmed, monitored, and reset remotely by connecting them to a programmable logic controller (PLC), human-machine interface (HMI), or computer. If you want to program them locally, they have a keypad.

Remotely control these relays through an app on your smartphone—they simultaneously monitor phase, voltage, and frequency. The downloadable app lets you change the tripping range, modify settings, and save programs to apply to multiple relays. Tap your smartphone or tablet to the relays to connect to them. They use NFC (near field communication), so you don’t need to manually pair them like Bluetooth devices.

You’ll often see these relays used to protect motors, generators, and other three-phase circuits from burning out or overheating. They'll switch the circuit off if they detect voltage or frequencies outside of the set range or phase loss, imbalance, or reversal. You can see that they're wired correctly and when they're actuated based on the LED indicators. Rated IP20, they have recessed terminals that keep fingers and other objects from touching live circuits. Mount them on a 35 mm DIN rail (also known as DIN 3 rail) for fast installation.

Clip these detectors to your hard hat to identify voltage and current from 360°. Without making physical contact, they flash light in the direction of the electrical threat and beep louder as you get closer to it. These lightweight detectors are comfortable to wear all day. They’re often used to identify live conductors, energized lines underground, and residual voltage.

Set the sensitivity level to determine when the detector alerts you. While the battery life varies depending on the number of alerts, a full charge can last up to five days. Recharge the battery with the included USB charging cable or a standard USB 2.0 Micro-B charger.