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China RCT Series Current Transformer Suppliers - High-Quality Factory Solutions for Power Monitoring and Protection

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Discover our high-quality Current Transformer (CT), a crucial electrical device designed to effectively monitor, control, and protect your power supply systems. These transformers are vital for managing significant volumes of detectable alternating current (AC) involved in various applications. At our China-based factory, we specialize in manufacturing current transformers that cater to high-current power circuits used in power production, transmission, distribution, and industrial settings. With trusted local suppliers providing premium materials, our CTs are perfect for enhancing safety and precision in your electrical operations.

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    Product Details

    Product Overview

    A CT employs electromagnetic induction and consists of two windings: a secondary winding with several turns linked to safety or measurement devices, and a primary winding with a few turns connected in series to a high-current circuit. In comparison to the primary winding, the secondary winding, which is usually tuned to 5A or 1A for most industrial applications, receives incredibly little current.

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    Key Requirements: CTs require enough insulation to handle a high voltage between windings, linearity to minimize measurement mistakes, and high precision for energy metering.

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    Important Warning: When using a CT, never leave the secondary winding open circuit. An open circuit can produce extremely high voltages that can damage electrical equipment.

    Finally, current transformers are crucial to the reliability, efficiency, and safety of modern electrical systems because they enable more precise current monitoring and problem identification.

    Technical Parameters

    📋 Rated Current by Model
    Type Rated Current (A)
    RCT-35 100/5A, 120/5A
    RCT-58 1000/5A, 1200/5A
    RCT-90 800/5A, 1000/5A, 1200/5A, 1500/5A, 1600/5A
    RCT-110 1000/5A, 1200/5A, 1500/5A
    📐 Dimensional Parameters (mm)
    Type A B C D E F G
    RCT-35 93 78 25 78 2 55 9
    RCT-58 93 78 60 104 2 41 9
    RCT-90 93 78 90 136 2 41 9
    RCT-110 102 86 111 157 2 52 9

    Frequently Asked Questions (FAQ)

    Q
    What is the purpose of a Current Transformer (CT)?
    A Current Transformer (CT) is used to measure high currents by converting them into a smaller, safer secondary current (typically 5A or 1A) that can be safely used by measuring instruments, protection relays, and other monitoring devices.
    Q
    Why should the secondary winding of a CT never be left open circuit?
    Leaving the secondary winding open circuit is dangerous because it can generate extremely high voltages across the secondary terminals. These voltages can damage insulation, destroy connected equipment, and pose a serious safety hazard to personnel.
    Q
    What are the standard secondary current ratings for CTs used in industrial applications?
    For most industrial applications, the secondary winding of a CT is standardized to either 5A or 1A. The RCT series models listed here are all rated at a 5A secondary output (e.g., 1000/5A, 1200/5A).
    Q
    What is the difference between the RCT-35, RCT-58, RCT-90, and RCT-110 models?
    The main differences between these models lie in their dimensional parameters (such as window size C and overall height D) and their supported rated current ranges. Larger models like RCT-110 support higher current ratings and have larger physical dimensions to accommodate greater insulation and core requirements.
    Q
    What key performance requirements must a CT meet for energy metering?
    For energy metering applications, a CT must provide high accuracy to minimize measurement errors, excellent linearity across its operating range, and sufficient insulation to safely handle the high voltage present between primary and secondary windings.
    Q
    How do current transformers contribute to electrical system safety?
    Current transformers isolate high-voltage, high-current circuits from sensitive measurement and protection equipment. They enable precise current monitoring and fault detection, which are essential for maintaining the reliability, efficiency, and safety of modern electrical power systems.