Description Of 1 Ph Package B20A - ABB REB670 Applications Manual

1MRK 505 337-UUS -
3.1.7
Application manual

Description of 1 ph package B20A

One-phase version of the IED with two low-impedance differential protection zones and
twelve CT inputs B20.
• Due to three available binary input modules, the B20A is intended for applications
without need for dynamic Zone Selection such as substations with single busbar with
or without bus-section breaker, breaker-and-a-half or double breaker arrangements.
Three such IEDs offer cost effective solutions for such simple substation
arrangements with up to twelve CT inputs.
• This version can be used with external auxiliary 3-phase to 1-phase summation
current transformers with different turns ratio for each phase.
Section 3
Configuration
53