The ring current transformer depends on the structure of the closed magnetic ring core, which can accurately detect the ground fault current and the current remaining in the power lines. The RCT series is a residual current conveyor based on the ring current transformer technology, which plays a crucial role in detecting leaks in three main scenarios: light collection boxes, data center rooms and intelligent street lighting.
1. Light container box: milliamp level outlet line control
1.1 Background of application
Light-emitting power plants are exposed to the outside environment for a long time, and the insulation layer of the cables is subject to aging and damage. In a light energy project spread over an area of 11.66 MW, the failure rate of conventional integrated control solutions is 45%. In the event of a channel failure, all equipment must be replaced, which significantly affects energy generation revenues. If a grounding fault on the DC side is not detected in time, this can lead to a loss of power generation and even an arc fire.
1.2 RCT solution
The RCT series is mounted as a power converter for energy control at the input stations of each light box branch to control the residual current of each light series in real time. This product is based on the ring current transformer technology and has a design that separates the monitoring host from the processor. If a channel fails, only the corresponding converter must be replaced. The RCT provides output signals from the 5A output current transformer, which are seamlessly integrated into the interfaces of the converter protection. The fully enclosed design of the plastic shell is suitable for harsh outdoor environments such as humidity and salt radiation. Due to the separate distribution of the RCT in several chain circuits, operation and maintenance personnel can accurately determine the location of insulation fault chains and blind closures in a wide range of areas. Avoid the scope. The low outlet properties of the magnetic ring current transformer guarantee a precise milliampere outlet detection.
2. Room data center: early warning of leaks
2.1 Background of application
The data center serves the core business with energy-intensive distribution systems and continuous long-term commissioning of IT equipment, UPS, etc. which can easily accumulate with problems such as heating lines and aging insulation. After an earthing leak, the protection can malfunction and cause work interruptions and, in severe cases, lead to an electrical fire. An accurate warning of light power outages before a fire is the key to preventing electrical fires.
2.2 RCT solution
The RCT series is integrated into the low voltage distribution cabinet of the data center and on the output side of the power supply circuit in the IT cabinet, the power supply circuit for precise air conditioning and the input/output circuit of the UPS. The product collects the remaining current signals from each circuit and sends data in real time to the electrical host for fire monitoring via the RS485 interface via the Modbus protocol. The accuracy of the RCT reaches the level of 0.5, fully complies with the standard of the power carrier with high accuracy current transformer class 0.5 and guarantees data reliability even in complex harmonic environments. If the RCT detects an incorrect increase in residual current in a particular circuit, the monitoring system immediately issues an audible and optical alarm and pinpoints the exact location of the fault. It should be noted that the equivalent design of the ring current transformer allows it to maintain a stable conversion ratio on a large scale, which makes it particularly suitable for scenarios of dense multi-time assembly in data centers.
3. Intelligent street light: safety protection against air leakage
3.1 Background of application
The city’s street lighting system is widely distributed and the environment is complicated. Lamp poles are exposed to wind, rain and sunlight for a long time, and the insulation of the cables is prone to aging and cracking. The crucifix is also susceptible to water and moisture. During the rainstorm and the spread of water, the accumulated water sank the base of the street lamp and the metal pole of the electric lamp was a serious danger to a electric shock to pedestrians. According to GB 55024-2022, other protective devices currently operating in the vicinity of outdoor lighting stations must: with a rated operating value of no more than 30mA.
3.2 RCT solution
The RCT series is mounted in each circuit from the distribution box of a street lamp to monitor the residual current for each street lamp area in real time. If the leakage exceeds the 30mA threshold, the RCT displays a millisecond travel signal connected to the circuit section to the fault circuit section. to prevent electric shock and fire. The product adopts a fully enclosed plastic structure, suitable for outdoor environments such as humidity, salt spraying and large temperature differences. The standard output signal 5A RCT can be connected to an intelligent gateway to transmit the leak status to the IoT platform in the cloud, and management staff can view the status of each circuit remotely. Thanks to the high sensitivity of the ring current transformer, RCT can detect small leakage currents up to 0.1 mA and significantly exceed the requirements of national standards. As a professional industrial current transformer supplier, Heyi Electric can provide complete solutions for RCT selection for industries such as city lighting, light energy and data centers.
Compay: WENZHOU HEYI ELECTRICAL CO.,LTD
Brand: HEYI/ASCT
Contact: Bethy
E-mail: heyi@heyiele.com
Tel: 86-13968747975
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