AREVA 49.102.110-20/30 Trip / Close Shunt Coil

AREVA 49.102.110-20/30 Trip / Close Shunt Coil

Introduction

The AREVA 49.102.110-20/30 (often cataloged under legacy brands Alstom Grid, AEG, or General Electric) is a heavy-duty, high-integrity Trip/Close Shunt Coil (Opening and Closing Release Coil). Specifically developed for high-voltage and medium-voltage circuit breakers—such as the prominent Alfa / GL series SF6 gas-insulated circuit breakers—this electro-magnetic actuator transforms remote electrical switching commands into the rapid physical kinetic strokes required to split or join heavy electrical contact breakers safely.

Unique Product Description

Engineered to operate at the absolute frontline of grid protection, the AREVA 49.102.110-20/30 coil solves the problem of high-speed mechanism execution under extreme fault profiles. It features a finely wound, highly dense magnetic copper coil block optimized at a nominal 35.5 Ohms resistance. Designed to handle high-current, short-duration pulse excitation from a 125 VDC control grid, it delivers instant mechanical actuation force to breaker latches within milliseconds. This robust design prevents slow arcing and protects massive grid substations from sustained downstream fault arcs.

Technical Parameter Table

Parameter,Specification / Value
Brand / Manufacturer,AREVA / ALSTOM Grid / General Electric
Part Number,49.102.110-20/30 (Alt: CC49.102.110-20/30)
Component Category,Trip/Close Magnetic Shunt Coil Assembly
Nominal System Control Voltage,125 VDC (Direct Current Operating Loop)
Internal DC Resistance,35.5 Ω (Tolerance rating of ±8%)
Equipment Compatibility,”Alfa Series Circuit Breakers, GL-Series SF6 Gas Breakers, DT1 Gas Circuit Breakers”
Insulation Class,Class H / High-Temperature Epoxy Encapuslated
Duty Cycle Rating,Intermittent duty (Pulse-rated excitation)
Net Weight,Approx. 0.65 kg
HS Code / Commodity Code,8505.90.00 (Electromagnets; Coils; Actuators)

Product Advantages and Features

Instantaneous Actuation Velocity: Generates powerful magnetic flux lines in a fraction of a millisecond, driving the breaker spring release instantly to break high-power faults.

Thermal Overload Resilience: The heavy-duty winding shell is sealed with a robust potting material that prevents structural micro-shorts or insulation degradation caused by high ambient substation heat or cold seasonal transitions.

Tight Resistance Calibration: Operating at an exact 35.5 $\Omega$ resistance window prevents unpredictable control power draw, ensuring the protection line always matches station battery circuit breaker sizing profiles.

Drop-In Mechanical Fit: Features pre-engineered mounting brackets and plug-type terminal nodes that fit right into legacy Alstom/AREVA spring operating mechanisms (e.g., FK3 or FKG platforms).

Application Cases

1. High-Voltage Substation Grid Protection

Deployed inside standard AREVA GL-series SF6 gas-insulated breakers in utility networks, the 49.102.110-20/30 serves as the primary trip actuator. When a remote protective relay senses a lightning strike down the line, it pulses this coil to drop the main contactor grid line inside milliseconds.

2. Metallurgical Plant Cogeneration Breakers

An industrial steel mill utilizes these trip coils within its local substation breaker frames. The robust insulation barrier protects the inner copper loops against heavy, conductive atmospheric metal dust and massive electromagnetic interference (EMI) loops generated by nearby arc furnaces.

Related Models & Other Models in the Same Series

The 49.102.110-20/30 operates inside a modular framework of breaker mechanism spare parts and control linkages:

AREVA CC49.102.110-16: A lower-voltage configuration variant optimized for 48 VDC utility switching stations.

ALSTOM 49.102401-01 / 49.102.110-10: Alternative sequence production variants with alternate resistance steps tailored for custom industrial trip topologies.

AREVA CC49.105.100-01 (FK3-X): Heavy-duty auxiliary switches and position indicators mounted directly adjacent to the coil package to manage trip loop interlocks.

Installation and Maintenance

Installation Guidelines

Total Isolation Verification: Before unbolting or adjusting breaker mechanisms, ensure the primary high-voltage busbar is isolated and grounded. Ensure all local mechanism energy storage springs are fully discharged.

Control Fuse Extraction: Pull the auxiliary 125 VDC distribution fuses in the marshalling kiosk panel to ensure the control line cannot accidentally fire during the replacement process.

Mechanical Alignment: Slide the coil frame smoothly into the dedicated operating housing block. Ensure the internal iron plunger lines up cleanly with the latch trigger plate to avoid kinetic binding during a trip sequence.

Terminal Polarity Check: Connect the control wires securely. Ensure the integrated anti-surge freewheeling diodes (if deployed on the terminal block) match the polarity lines to prevent immediate circuit shorts.

Maintenance Recommendations

Resistance Validation Tracking: During bi-annual substation diagnostic intervals, use a calibrated digital multimeter to measure the coil resistance across its leads. Any deviation away from the base 35.5 $\Omega$ parameter highlights internal winding breakdown.

Plunger Cleansing: Ensure the inner core shaft area stays free of evaporated old grease or gummy aerosol lubricants that collect dust and slow down physical response speeds.