Voltage presence indicator - LED lamp with fuse holders SON WTA-3K 002471651

Voltage presence indicator SON WTA-3K is a practical solution for optical signaling of voltage in three-phase networks. The device, mounted on a TH-35 rail, indicates the presence of voltage in each phase using red, yellow, and green LEDs. Thanks to the built-in fuse holders (5x20 mm), it does not require additional protection, saving space in the distribution board.

Functionality and application

The WTA-3K indicator light is particularly useful during maintenance and repair of electrical installations. It quickly and clearly indicates which phases are energized and which are disconnected – increasing work safety. It finds application in both industrial installations and commercial and residential buildings. Thanks to its compact size (1 module – 18 mm wide), it is easy to install even in crowded distribution boards.

Construction and characteristic features

The device is made of high-quality materials, guaranteeing its durability and reliability. The kit includes time-delay fuse links 500/630 mA, but it is possible to use links with other currents and characteristics (available separately). It is worth noting the wide operating temperature range – from -25°C to 50°C – which allows operation in various environmental conditions. The power supply is 230 V AC. Connection cables are secured with 2.5 mm² screw terminals with a tightening torque of 0.4 Nm. Protection class IP20 provides basic protection against contact.

• Three-phase signaling: Red, yellow, and green LEDs for each phase.
• Built-in protection: Fuse holders eliminate the need for additional protective modules.
• Compact dimensions: 1 module (18 mm) facilitates installation in tight spaces.
• Wide operating temperature range: -25°C to 50°C ensures reliable operation in various conditions.
• Easy installation: On a standard TH-35 rail.
• Compliance with standards: The device meets the requirements of the Low Voltage Directive LVD 2014/35/UE and electromagnetic compatibility EMC 2014/30/UE.