RET 521

Overview

RET521 is an ABB transformer protection terminal designed for reliable fault protection and monitoring in power systems.

Identification

• Product No.: RET521

• Type: Transformer Protection Terminal

• Manufacturer: ABB

Electromagnetic Emission

• Radiated range: 30–1000 MHz

• Conducted range: 0.15–30 MHz

Insulation Tests

• Dielectric test: 2.0 kV AC, 1 min

• Impulse voltage test: 5 kV, 1.2/50 μs, 0.5 J

• Insulation resistance: > 100 MΩ at 500 V DC

General Data

• Weight: ~10 kg

• Dimensions: Width 336 mm (¾ of 19"), Height 267 mm (6U), Depth 245 mm

• Protection level (front): IP40 (IP54 with sealing strip)

• Protection level (sides): IP30

• Protection level (back): IP20

• Storage temperature: −40 °C to +70 °C

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