Table of Contents
Learn more about split core current transformer
With the development of digital substations and smart grids, electrical current transformers have been widely used, mainly in the measurement, protection and monitoring of power systems.
Current transformers are widely used to convert a high voltage current input and produce a proportional low voltage, low current signal on the secondary side for measurement and monitoring.
In google trends, there is a lot of data on current transformers, while they have very little data on split core current transformers in the United States.
So what are split core CTs used for?
Split core current sensors are widely used to monitor AC currents for various devices, such as wireless energy monitors, energy meters, etc.
Also, split-core current transformers are primarily used at low voltages because the SCT has to be turned on and off, which prevents the SCT from being effectively sealed and insulated, so it is usually used in low-voltage distribution cabinets or low-voltage overhead lines. There are, of course, special cases..SCT can also be used at 10KV if the carrier of the primary current is a cable structure and the cable is sufficiently insulated..Since the opening and closing part of the SCT is extremely close to a bare busbar, that is, there is no effective isolation, and there is no sufficient safety distance, then there is no effective insulation, so normally the SCT installed on the busbar can only be used for low voltage.
The working principle of split core current transformer
The working principle of the open-ended low-voltage current transformer is that the primary winding of the open-ended current transformer is connected in series in the line under test, and Ip is the line current converted into the secondary current Is. In general, the output secondary current can be 5 Å, 1 Å or lower to 10mA etc..It depends on the number of secondary turns of the current transformer, which is the impedance of the secondary circuit device and the connecting wires.
The split core current transformer is based on the same electromagnetic induction principle as the current transformer function.. Simply attach a snap joint or clamp to the structure and it can be fixed directly to the cable.
Difference between current transformers and split core current transformers
Current transformers can be classified as high-voltage or low-voltage, which are mainly distinguished by the device’s maximum voltage.. Typically, 10KV or more is high voltage, 10KV is medium voltage and 1KV and below is low voltage.
Split core current transformers are primarily used at low voltages because the SCT has to be turned on and off, which prevents the SCT from being effectively sealed and insulated, so it is usually used in low-voltage distribution cabinets or low-voltage overhead lines.
There are, of course, special cases..A split-core current transformer at 10KV can also be used if the primary current carrier is a cable structure and the cable is sufficiently insulated.
Since the opening and closing part of split core current transformer is extremely close to a bare busbar, there is no effective isolation, and there is no sufficient safety distance, then there is no effective insulation, so typically the SCT installed on the busbar can only be used for low voltage.
In addition to being designed for quick installation, they are also excellent in:
DIGITAL NETWORKING
Our split core sensors can be connected with smart devices to make the power grid safer, more environmentally friendly, more profitable and even the entire power transmission and distribution system more smarter.
SMALL AND LIGHT
Split core current transformer is around 2.08 pounds to 7.3 pounds for different outputs and dimensions.
SNAP JOINT STRUCTURE
The diameter of the inner hole ranges from 6 mm to 35 mm. With the snap joint structure, it can be attached directly to the cable via a nylon tie.
GOOD MECHANICAL PROPERTIES
Completely enclosed, with excellent mechanical properties and environmental resistance, strong voltage isolation capability, safety and reliability.
INDIVIDUAL COMPONENT
The Split Core Current Transformer is not only part of the product, but a separate component for use..They could be easily bought from Amazon or Xiamen ZTC Technology Co., (Zentar) factory as sample order.
Typical Structural features of split core current sensors
Our split-core current sensor has an excellent design structure, attractive appearance, and a transparent flip-top design for easy wiring. The case material is made of PC / PA66 alloy, which has high temperature resistance, high mechanical strength, and environmental protection properties;;The iron core is made of oriented cold-rolled silicon steel sheets, which have stable properties, high mechanical strength and magnetic permeability; The enameled wire in the skeleton coil is of high-strength enameled wire, which has great insulation strength and strong temperature resistance.
The open-type current transformer was developed based on the conventional low-voltage bus-type current transformer..It is compatible with cable and copper strip installation methods. Based on the range of primary current measurements, the main specifications are as follows:
Regular circuit connection diagram of split core current transformers
The working principle of the open-ended low-voltage current transformer is that the primary winding of the open-ended current transformer is connected in series in the line under test, and Ip is the line current converted into the secondary current Is. In general, the output secondary current can be 5 A, 1 A or lower to 10mA, etc., depending on the number of secondary turns of the current transformer, which is the impedance of the secondary circuit device and the connecting wire.
Split core current transformer, as its name implies, is a current transformer that can be opened and closed on the primary circuit (the side of the measured current circuit, normally a cable or parent card), and is a secondary device by sensing the current on the primary circuit Take measurements or protect relays.
How to choose split core current transformer
Split-core current transformers (CTs) are used to measure electrical current in a circuit by providing an isolated, low-voltage output that is proportional to the current flowing through the primary conductor.They are also typically used in electrical panels, motor control centers, and other electrical devices to monitor and control the flow of electrical current.
When choosing a split-core CT, there are several factors to consider:
Current range:
Make sure the CT has a current range that covers the range of currents you want to measure.
Choose a CT with a high accuracy rating to ensure the measurement is as accurate as possible.
Split core CTs and stability are related to the safe and stable operation of power systems. In our product, accuracy can be as high as 0.5% to 2% and you can choose the level of accuracy you need.
Frequency:
Make sure the CT is compatible with the frequency of the electrical system you are using.
Mounting:
Consider mounting options for the CT. Some split-core CTs can be mounted on a single DIN rail, while others may require a separate mounting bracket.
Size:
Make sure the CT fits in the space available for installation. The sizes of our series of split-core current sensors range from 6 mm to 36 mm. It can meet the different size requirements of customers.
Choose a CT that is built to withstand the environmental conditions in which it will be used, such as temperature and vibration.
Burden:
The burden of a CT is the load placed on the secondary circuit by the CT. Make sure the burden of the CT is compatible with the load you will be measuring.
Primary conductor size:
Choose a CT with a primary conductor size that is compatible with the size of the conductor you will be measuring.
Environmental factors:
Consider the environmental conditions in which the CT will be used, such as temperature and humidity. Make sure the CT is rated for use in these conditions.
Price:
Compare prices from different manufacturers to find the best value for your needs.
Why should the price of a split core current sensor be higher than other current transformers for measurement? This is due to the special design used for the installation. Non-invasive split-core current transformers are ideal for installation on existing electrical wiring because they can be snapped and clamped around individual conductors without cutting any cables.
Cost:
Determine your budget and choose a CT that meets your measurement needs and is within your budget.
How to use split-core current transformers for metering and energy monitoring
In recent years, while the development of global distribution networks has improved significantly, the development of urban and rural areas has been uneven, and the quality of electricity needs to be improved. At the same time, the country has been making constant demands for energy management..In such a general environment, we urgently need In the second transformation, the current transformer is needed to measure or protect the line in the transformation project, but the ordinary current transformer is a fully enclosed structure because this current transformer is a closed loop The structure, so the line must be disassembled once in use, and the line must be disassembled again, and the power must be cut off.
Some shopping malls and supermarkets will have a hard time if the power is cut off for a few days or even half a month for the purpose of the conversion. The damage to businesses has been extreme. Thus the clamp on current transformer comes into being.The split core sensor current transformer is characterized by a clamped or split-on structure on the primary side of the current transformer. Material and financial resources, and considerably improved efficiency.
Xiamen ZTC Technology Co., Ltd made a kind of split core current transformer (CT) is a type of electrical device that is used to measure the current flowing through a conductor. It is commonly used in electrical metering and energy monitoring applications to measure the electrical usage of a particular circuit or device.
Presentation of a demonstration of how split-core CTs can be used for energy measurements
Using a wireless energy monitor as the demonstration device
Home energy monitors are widely used to give power consumption insights and save energy usage, monitoring electricity in real time.
Xiamen ZTC Technology is a manufacturer of OEM/ODM services for energy monitor HARDWARES ONLY for customers who intend to launch and develop customized/own brand devices in the local market.
If you need hardware with Apps for use or direct distribution on your local market, we currently do not have an existing developed device that can provide it.
Regular energy monitor specifications
Three-phase split core current sensor with WIFI communication module
WiFi @ 2.4 GHz 802.11b/g/n transfer protocol
Support for current, voltage and power measurements on up to 3 phase lines.
Support TCP/UDP network transmission mode
Support Simple Config/Airkiss/usrlink for fast networking configuration.
The antenna is externally mounted on our device. This results in an excellent signal against electromagnetic shielding.
Device Image
Video Demonstration
- This video demonstrates how to connect a wireless energy monitor to the TUYA app.
- As you can see, this is a three-phase energy monitor. To give you a better idea, we put the hardware onto a sketch to show you a layout of the con
If you do not have a TUYA app, you can scan a QR code and download it to your phone. - Use a pin inserted in the pin hole to launch the energy monitor.
- The open tuya app then scans the QR code to connect the monitor to set the WIFI configuration.
- Connect to your WIFI network
- Insert the reset pin hole for about 5 seconds until the red light gradually flashes
- Choose the option (slow flash) on the app
- The WIFI hot spot of the monitor emission is then reconnected.
- The WIFI configuration between the monitor and the phone will be successfully set up after a short time.
- Data from three phase CTs can be seen.
- When setting 5 and 10 Amp, you can see that the app shows the same results.
To use a split-core CT for electric metering and energy monitoring, you will need to follow these steps:
- Determine the size of the CT you need based on the current you are trying to measure. CTs are available in various sizes and can only measure a certain range of currents.
- Install the CT around the wire you want to measure. Split core CTs can be turned on and off around the conductor, making them easy to install without interrupting power flow.
- Connect the CT to your metering or energy monitoring device. This may involve running wires from the CT to the device and connecting them using appropriate connectors.
- Calibrate the CT according to the instructions provided by the manufacturer. This will ensure that the CT accurately measures the current flowing through the conductor.
- Monitor the current flowing through the conductor using your metering or energy monitoring device. The device will typically display the current in real-time, allowing you to track changes in electrical usage over time.
When installing and using a split-core CT, it is important to follow the manufacturer’s instructions and any local electrical codes. If you are unfamiliar with electrical work, it is recommended that you hire a qualified electrician to install and calibrate your CT.
Please use the clamp on current sensor in strict accordance with the product instructions. If you have any questions, please come to us for feedback and questions. Our reliable after-sales service will give you the perfect shopping experience.
1.Determine the size of the CT that you need based on the current that you are trying to measure. CTs are available in various sizes and can only measure a certain range of current.
2. Install the CT around the conductor that you want to measure. Split core CTs can be opened and closed around the conductor, making them easy to install without interrupting the flow of electricity.
3. Connect the CT to your metering or energy monitoring device. This may involve running wires from the CT to the device and connecting them using appropriate connectors.
4. Calibrate the CT according to the instructions provided by the manufacturer. This will ensure that the CT is accurately measuring the current flowing through the conductor.
5. Monitor the current flowing through the conductor using your metering or energy monitoring device. The device will typically display the current in real-time, allowing you to track changes in electrical usage over time.
It is important to follow the manufacturer’s instructions and any local electrical codes when installing and using a split core CT. If you are not familiar with electrical work, it is recommended to hire a qualified electrician to install and calibrate the CT for you.
Please use the clamp on current sensor in strict accordance with the product instructions. If you have any questions, please come to us for feedback and enquiries. Our reliable after-sales service will provide you with the perfect shopping experience.
