The EPZU-300 and EPZU-470 devices are designed to protect birds from electric shock on overhead power lines (OHL) through fecal streams. Additionally, their use prevents OHL outages caused by electrical flashovers of insulators due to contamination by bird droppings, corrosion products, and other pollutants flowing from the crossarm onto the insulators.

Design and Installation
EPZU devices are manufactured with internal (seating) diameters of 16, 20, 24, and 32 mm; the seating diameter size is indicated in the product marking. EPZU-300 devices are installed on the upper end fitting of polymer insulators up to 110 kV inclusive. EPZU-470-16 is mounted on the neck of the clevis tongue of class 70 kN or 120 kN, and EPZU-470-20 on the neck of the clevis tongue of class 160 kN or 210 kN, on which the upper insulator of the string or polymer insulator is fixed. EPZU-470-24 and EPZU-470-32 are mounted on the upper end fitting of a polymer insulator for voltages of 110–220 kV.

Standards Compliance
The devices comply with STO 34.01-2.2-011-2015 requirements by PAO Rosseti and are manufactured according to TU 3449-001-52819896-2013.

Technical Specifications

• EPZU-300-24:
  • OHL Voltage Class: 6–110 kV
  • Device Diameter (D): 300 mm
  • Wind Area: I–VII
  • Version: UHL1
  • Weight: 0.9 kg
• EPZU-300-32:
  • OHL Voltage Class: 6–110 kV
  • Device Diameter (D): 300 mm
  • Wind Area: I–VII
  • Version: UHL1
  • Weight: 0.9 kg
• EPZU-470-16:
  • OHL Voltage Class: 6–750 kV
  • Device Diameter (D): 470 mm
  • Wind Area: I–VII
  • Version: UHL1
  • Weight: 2.1 kg
• EPZU-470-20:
  • OHL Voltage Class: 6–750 kV
  • Device Diameter (D): 470 mm
  • Wind Area: I–VII
  • Version: UHL1
  • Weight: 2.0 kg
• EPZU-470-24:
  • OHL Voltage Class: 6–750 kV
  • Device Diameter (D): 470 mm
  • Wind Area: I–VII
  • Version: UHL1
  • Weight: 1.9 kg
• EPZU-470-32:
  • OHL Voltage Class: 6–750 kV
  • Device Diameter (D): 470 mm
  • Wind Area: I–VII
  • Version: UHL1
  • Weight: 1.8 kg