BuyLog Flippingbook FEB 2025

LOW VOLTAGE POWER & INSULATED CASE CIRCUIT BREAKERS, BUYLOG SECTION 8

8-144

— Gerapid high speed DC circuit breakers

Typical Traction Electric Power System

Rectifier CBs protect converters

Feeder CBs distribute DC to the track

AC bus duct

DC bus duct

Electric utility Primary switchgear, 5kV-38kV Transformer

Heavy duty traction rectifier DC switchgear

Third rail or overhead contact system

In addition to traction substation applications, Gerapid can be used as a feeder breaker in various other installations such as industrial plants (metals industry), as field breakers for motor and generator field applications, and as disconnects for DC drives, to name a few.

Circuit Breaker Features and Accessories - Insulated side plates with adjustable dial for setting over current trip (OCT) (optional) - Mechanical forced tripping - Electrodynamic trip device (with or without capacitor and charging unit) - Shunt trip - No-voltage release - Breaker auxiliary contacts (up to 10 form C) - Additional auxiliary contacts for signaling (optional) - Main terminal configurations variable - Plug connectors for auxiliary circuits (optional) - Hand lever for manual actuation from front (for mainte nance purposes only) - Position indication (optional) - Internal power supply with a wide range of supply volt age options - Integrated current measurement unit (SEL) (optional) - Mechanical counter

Key Benefits - Standard dimensions from 2,600A to 6,000A (feeder models GER2607 – GER8007) - Operating voltages from 1,000 to 3,600Vdc - Mining and traction compliant (ANSI C37.14, IEC 947-2, EN 50123-2). Also available with UL label. - High speed OPEN/TRIP (opening delay <3ms) - Direct acting instantaneous and adjustable trip unit works without imported energy and is available as bidi rectional symmetrical (for line feeder) or undirectional (for rectifier breaker) - High speed CLOSE (approximately 150 ms) - Solenoid drive (integral control unit, mechanically latched, no auxiliary power required to keep contacts closed) - 2-stage contact system minimizes contact wear - Compact, enclosed construction - Modular, serviceable design - Easily accessible control and auxiliary connections

- Fixed and draw-out versions - Extensive accessories/options

General Information Rated Temperature -5° to 40°C ambient (55°C with reduced ratings) Relative Humidity 90% @ T<20°C; RH=130-2*T @ T>20 °C Altitude -120m to 2000m above sea level