Schneider AEG 557VIC12620

The Schneider AEG 557VIC12620 is a modular current transformer (CT) engineered for medium and low-voltage distribution systems. Boasting a compact design, it delivers high-precision current measurement and protection capabilities, and is widely integrated into switchgear cabinets, substations, and industrial automation systems.

Key Specifications

• Secondary Rated Current: 5 A
• Primary Rated Current Range: 0.5 A – 2500 A (optional)
• Secondary Rated Voltage: 5 V (50 Hz)
• Accuracy Class: 0.5 % (Class 0.5)
• Frequency Range: 45 Hz – 65 Hz
• Insulation Class: Class B (withstand voltage: 5 kV)
• Operating Temperature: -15 ℃ – +40 ℃ (average temperature ≤ 35 ℃)

Product Features

1. Five Protection Functions
    

   Short-circuit protection, overload protection, misoperation prevention, moisture resistance, and dust resistance ensure maximum operational safety.

2. Compact Structure
    

   Small footprint enables easy installation in space-constrained environments.

3. Extended Service Life
    

   Core components (contactors) support up to 2.5 million electrical operations and allow high-frequency cycling (600 operations/hour).

4. High-Voltage Current-Limiting Fuses
    

   Rapidly interrupt short-circuit currents to minimize impact on system and equipment integrity.

5. Flexible Modular Integration
    

   Directly compatible with Schneider AEG VCB cabinets, offering multiple wiring configurations: top-in top-out, bottom-in bottom-out, top-in bottom-out, and bottom-in top-out.

6. Technical and Economic Efficiency
    

   Reduces feeder cross-sectional requirements and cuts material costs for system design.

Structure and Components

• Primary Coil: Handles high current loads and is constructed with high-strength insulating materials.
• Secondary Winding: Provides standard 5 A output, wound with low-impedance copper wire for stable performance.
• High-Voltage Current-Limiting Fuse: Installed at the primary side inlet, featuring fast-break functionality.
• Housing and Mounting Bracket: Metal or plastic enclosure with pre-drilled bolt holes for secure fixation inside switchgear cabinets.
• Terminal Blocks: Dedicated terminals for primary and secondary sides ensure reliable wiring connections.

Typical Applications

• Current measurement and protection in switchgear cabinets and low-voltage distribution boards
• Secondary circuit monitoring in substations
• Power metering and load monitoring in industrial automation systems
• Integration with Energy Management Systems (EMS) and Distribution Management Systems (DMS) platforms

Installation and Maintenance Guidelines

Environmental Requirements

• Ambient air temperature shall not exceed 40 ℃ (average temperature ≤ 35 ℃)
• Relative humidity ≤ 95 %
• Minimum operating temperature: -15 ℃

Wiring Precautions

• Use wires rated for the specified primary current for primary-side connections
• Maintain standard 5 A output on the secondary side and avoid short-circuiting the secondary circuit

Mounting Requirements

• Secure the enclosure to switchgear cabinets using supplied bolts to ensure vibration and dust resistance

Routine Inspection

• Inspect high-voltage current-limiting fuses and primary-side insulation condition every 6 months; replace components as needed

Replacement of Wear Parts

• Conduct preventive replacement of contactors and other consumable components before cumulative operations approach 2.5 million cycles

If you would like to learn more about our products and services, please feel free to contact us at any time!

• Sales Manager : Jinny
• Email : sales5@xrjdcs.com
• Whatsapp/Mobile:+86 15359273791

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