ABB PR112 Protection Trip Unit

Feature & Principle

It is an electronic protection trip unit for ABB SACE air circuit breaker. It collects current signals from the current transformer, judges overload, short circuit and earth fault conditions according to protection curves, and sends trip signal to cut off the circuit when fault occurs. It supports adjustable protection parameters and fault memory function, protects cables, transformers and downstream electrical equipment in power distribution network.

Specifications

Model: PR112 Brand: ABB Series: SACE Compatible breaker: Emax series ACB Protection function: Overload L, Short circuit I, Earth fault G Current range: Adjustable setting Communication: Optional communication module Power supply: Self-powered by CT Protection class: IP40 Mounting: Built-in installation on air circuit breaker Certification: CE, IEC, UL

Components & Diagnostics

Signal sampling circuit, protection processing chip, parameter setting DIP switch, LCD indicator panel, trip drive circuit, plastic housing. Common faults: protection false tripping, no trip on fault, display blank, protection parameter loss.

Product Brief

ABB PR112 protection trip unit, electrical distribution spare widely used for low voltage air circuit breaker overhaul and replacement.