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Help CenterAcrel 500A Open Loop Current Transformer for Low Voltage Systems
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As a professional manufacturer of electrical measurement and control equipment, Jinhua Dika Electrical Equipment is proud to offer the Acrel 500A Open Loop Current Transformer. Engineered for precision and reliability in low-voltage applications, this device represents our commitment to providing robust solutions for energy management, power monitoring, and system protection. It is designed to simplify current measurement without the need to break the primary conductor, making installation safer and more efficient for system integrators, panel builders, and facility managers worldwide. Our focus on quality manufacturing ensures you receive a component that delivers accurate data for informed decision-making and optimized electrical system performance.
The core value of this open-loop current transformer lies in its ability to provide a safe, isolated measurement of AC current up to 500 Amperes. It is an indispensable tool for modern electrical systems where monitoring power consumption, detecting faults, or controlling processes is critical. By converting a high primary current into a standardized, low-level signal, it enables seamless integration with meters, PLCs, SCADA systems, and energy management software.
- Non-Intrusive Split-Core Design: The open-loop, or split-core, construction allows for quick installation and retrofitting around existing busbars or cables without disconnecting the circuit. This minimizes downtime and eliminates risks associated with working on live conductors.
- High Accuracy and Linearity: Utilizing advanced magnetic sensing technology, it provides stable and precise current measurement across its specified range, ensuring reliable data for billing, auditing, and protection functions.
- Excellent Isolation and Safety: Provides galvanic isolation between the high-voltage primary circuit and the low-voltage secondary output, protecting personnel and downstream equipment from high-voltage hazards.
- Wide Operating Range: Designed to perform consistently in diverse environmental conditions, with a broad operating temperature range suitable for both indoor panel mounting and certain outdoor applications with proper housing.
- Flexible Output Options: Available with various output signals (e.g., 0-5V, 4-20mA, or digital communication protocols like RS-485 with Modbus) to match the requirements of different data acquisition systems.
- Compact and Durable Construction: Housed in a robust, flame-retardant casing that is compact enough to fit into tight spaces within distribution boards, control panels, or machinery.
The technical specifications of the Acrel 500A Open Loop CT are detailed below. These parameters are key to ensuring compatibility and performance in your specific application.
| Parameter | Specification |
| Rated Primary Current (Ip) | 500A AC |
| Measuring Range | 0 ~ 600A (or as customized) |
| Accuracy Class | Class 1.0 or Class 0.5 available |
| Frequency Range | 50/60Hz |
| Output Signal | Selectable: 4-20mA, 0-5V, 0-10V, etc. |
| Aperture Size | Customizable to fit conductor diameter |
| Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +85°C |
Choosing this current transformer brings several tangible benefits to your projects. Enhanced Safety is paramount, as installation does not require direct contact with live parts. Cost and Time Efficiency are significantly improved due to the quick-clamp design, reducing labor hours and system interruption. Furthermore, the high-accuracy data it provides is crucial for energy-saving initiatives, predictive maintenance, and ensuring the stable operation of your electrical infrastructure. It is a versatile component suitable for applications in commercial buildings, industrial plants, renewable energy systems (solar/wind), data centers, and water treatment facilities.
Backed by Jinhua Dika Electrical Equipment's manufacturing expertise and a commitment to systematic quality management, the Acrel 500A Open Loop Current Transformer is a product you can trust. Our company's operations are guided by established management principles, and we have successfully served a global clientele across North America, Europe, Southeast Asia, and other key markets, with an annual export value reflecting our reliability and scale. We ship from major ports like Shanghai, Tianjin, Guangzhou, and Ningbo, ensuring flexible and efficient logistics for our international partners. This device is more than just a sensor; it's a gateway to smarter energy management and safer electrical operations. Contact us today to discuss how this current transformer can be integrated into your system, or to inquire about custom specifications to meet your unique project requirements.
Frequently Asked Questions (FAQ)
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Q: What is the main difference between an open-loop and a closed-loop current transformer?
A: An open-loop (split-core) transformer has a hinged or separable core that can be clamped around an existing conductor. A closed-loop (solid-core) transformer requires the primary conductor to be threaded through its center during installation, typically used in new builds. -
Q: Can this sensor measure DC current?
A: No, this specific model is designed for measuring alternating current (AC) in low-voltage systems. Different technology is required for DC current measurement. -
Q: Is external power required for this current transformer to operate?
A: Yes, most models with analog or digital outputs are active devices that require a separate DC power supply (e.g., 12V or 24V DC) to operate the internal electronics that condition the signal. -
Q: How do I select the right output signal (4-20mA vs. 0-5V)?
A: The choice depends on your data acquisition system. 4-20mA signals are highly resistant to electrical noise and are ideal for long-distance transmission. 0-5V/0-10V signals are common for shorter distances within a control panel. Please check your PLC or meter's input specifications. -
Q: What is the maximum size of the conductor or busbar that can fit through the aperture?
A: The standard aperture size is designed for common cable diameters. For specific busbar dimensions or large cables, we can provide customized aperture sizes upon request. Please provide your conductor dimensions when inquiring. -
Q: Can multiple conductors be passed through one sensor for total current measurement?
A: Technically, yes, but it is not recommended for accurate phase-specific measurement. The sensor measures the net magnetic field. For summing currents (e.g., in a neutral conductor), it can be used, but for individual phase monitoring, one sensor per phase is standard. -
Q: Is calibration required, and how often?
A: The sensor is factory-calibrated. The need for recalibration depends on the application's criticality and environmental conditions. For most commercial energy monitoring, annual or biennial calibration is sufficient. High-precision applications may require more frequent checks. -
Q: Are these suitable for outdoor use?
A: The standard housing offers a degree of protection. For permanent outdoor installation, an additional protective enclosure or a specific IP-rated model is recommended to shield it from direct rain, dust, and UV exposure.
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