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1747-L551/B is an Allen-Bradley Rockwell SLC 5/05 Processor from the SLC 500 series
Response Time: ≤ 2 ms (0→1)
Enclosure Type Rating: None (Open-style)
High-speed counters: 4 Type A (default)
Form Factor: Series C
RET521 ABB | RET 521 Protect Transformer Protection Terminal COMMS Module 1747-L551/B is an Allen-Bradley RockwellOverview 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: 301000 MHz Conducted range: 0. 1530 MHz Insulation Tests Dielectric test: 2. 0 kV AC, 1 min Impulse voltage test: 5 kV, 1. 2 50 s, 0. 5 J Insulation resistance: > 100 M at 500 V DC General Data
