Ditek D50-120/240HLFM Surge Protector 120 240V High Leg Delta

Product Description

The DITEK D50-120/240HLFM is a surge protection device engineered for 120/240 volt AC high leg delta electrical systems. High leg delta configurations are common in commercial and light industrial facilities where three-phase power is distributed alongside single-phase 120-volt branch circuits. This unit provides transient voltage surge suppression at the service entrance or panel level, protecting downstream equipment from voltage spikes caused by lightning, utility switching, and inductive load switching. Installation is handled by a licensed electrician as part of a coordinated surge protection strategy.

The D50-120/240HLFM is designed for use in 4-wire high leg delta systems, a configuration frequently found in older commercial buildings, agricultural facilities, and light manufacturing environments. These systems present unique protection challenges because the high leg (wild leg) carries a higher voltage to neutral than the other phases. This device addresses that specific electrical topology, making it appropriate where standard single-phase or wye-configured surge protectors would not provide correct protection.

Key Features

• Rated for 120/240 volt AC high leg delta service
• Designed for 4-wire high leg delta electrical configurations
• Provides transient voltage surge suppression at the panel or service entrance
• Sold as an individual unit (each)
• Suitable for commercial and light industrial surge protection applications

Compatibility

Designed as an OEM-style surge protection replacement or new installation device for 120/240 volt AC 4-wire high leg delta electrical distribution systems.

Installation Notes

Installation must be performed by a licensed electrician in accordance with NEC Article 285 governing surge protective devices. De-energize the panel and verify zero voltage at all terminals before making connections. High leg delta systems require careful phase identification, as the high leg carries elevated voltage to neutral and must be wired to the correct terminal. Verify local code requirements before installation, as some jurisdictions may require inspection of surge protection device additions to existing service equipment.