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Schneider AEG A203G
1. Overview
The A203G is a compact medium-voltage fuse launched by Schneider Electric, mainly designed for circuit protection in power systems. When overcurrent or short circuit occurs, the fuse element melts and blows to cut off the current promptly, effectively preventing equipment damage and electrical fires. This series is renowned for its high reliability, wide applicable voltage range and convenient maintenance.
2. Specifications
Rated Voltage: Typically covering multiple grades including 5kV, 12kV, 15kV and 24kVRated Current: Ranging from 100A to 800A (some series extend up to 1250A)Rated Breaking Capacity: From 25kA to 100kA or higher, subject to specific modelsRated Service Life: The service life of fuse elements is usually 2.5 million operations (for electrically held type) or over 4 million operations
3. Product Features
The A203G series boasts the following outstanding advantages:
High Safety: Adopts five-proof design (anti-electric shock, anti-misoperation, anti-wrong connection, anti-theft & security protection, dustproof & waterproof), fully complying with stringent safety standards.
Long Service Life: Fuse elements feature an extra-long lifespan; especially the electrically held type can achieve millions of breaking operations, significantly reducing maintenance costs.
Compact Structure: With rational layout and compact size, it is easy to install in switchgear rooms or cabinets with limited space.
High Breaking Current: Utilizes high-voltage current-limiting fuse technology to quickly interrupt short-circuit current and minimize harm to the power system.
Cost-Effectiveness: Enables reduction of feeder cable cross-section, lowering overall investment costs.
4. Structure & Components
The A203G fuse mainly consists of the following key components:
- Base: Serves as the supporting and mounting foundation, generally made of robust metal materials.
- Fuse Element (Core Component): The core part responsible for fusing under overcurrent conditions. The A203G commonly adopts copper rod fuse elements with low resistance and high heat capacity.
- Shell: Usually a metal shell that provides protection and heat dissipation function.
- Terminals/Cable Junction Box: Used for connecting cables or wires to ensure reliable electrical connections.
5. Application Fields
This series is widely applied in various industrial and infrastructure projects:
- Power Plants: Protection for incoming and outgoing lines of generator sets and transformers.
- Substations: Protection for transformers, busbars and switchgear.
- Industrial Power Distribution: High-voltage power distribution systems in large-scale factories and mines.
- Urban Power Grids: Protection for distribution network transformers and power supply lines.
6. Installation & Maintenance
Installation: The A203G features flexible design, which can be directly installed in Schneider-manufactured VCB cabinets (cabinet combination) or used as an independent module. It supports diverse incoming and outgoing connection schemes, including top-in top-out and bottom-in bottom-out wiring methods.Maintenance: Thanks to the ultra-long service life of fuse elements, replacement is generally not required. Regular inspection of shell sealing status to ensure no dust and moisture is sufficient.Operating Environment: Suitable for ambient temperatures ranging from -15℃ to +40℃, with certain adaptability to humidity (average relative humidity not exceeding 95%).
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