A Current Transformer (CT) is a type of instrument transformer designed to measure alternating current (AC) by stepping down high primary currents to a lower, standardized secondary current. It is widely used in power systems, metering, protection, and monitoring applications.
Primary Winding – Carries the actual current to be measured (high current, e.g., 100A, 1000A).
Secondary Winding – Provides a reduced, proportional current (typically 5A or 1A) for measurement or protection devices.
Magnetic Core – Uses electromagnetic induction to transfer current from the primary to the secondary side while maintaining isolation.
The CT operates based on the principle of Faraday's Law of Induction:
Where:
Is = Secondary current
Ip = Primary current
N = Turns ratio (e.g., 100:5 means N=20)
- Isolation: Provides electrical separation between high-voltage primary circuits and low-voltage secondary instruments.
- Accuracy: Used for precise current measurement in energy metering (class 0.2, 0.5) and protection (class 5P, 10P).
- Burden: The load connected to the secondary must not exceed the rated burden to avoid errors.
- Saturation: Must avoid core saturation during fault conditions (important for protection CTs).
- Energy metering (utility billing, sub-metering)
- Protection relays (over-current, differential, earth fault protection)
- Power quality monitoring (harmonics, load studies)
- Industrial control systems (motor current monitoring)
Never open-circuit a live CT secondary! This can induce dangerously high voltages, risking equipment damage and personnel injury. Always short-circuit the secondary before disconnecting.
Independent Innovation with Superior Performance
DIXSEN's 0.5S busbar-type current transformers model ABO-B (CTs) represent a breakthrough in precision measurement, combining independent R&D innovation with over 30 years of engineering expertise in electrical instrumentation. Designed for high accuracy, durability, and versatility, these CTs are ideal for energy metering, power monitoring, and industrial applications.
Innovations
1. High Accuracy (Up to 0.2S Class)
Compliant with IEC 61869-2 and other international standards.
Standard 0.5 accuracy class, with select models achieving 0.5S, 0.2, 0.2S for ultra-precise metering.
Minimal phase & ratio errors, ensuring reliable billing and power quality analysis.
2. Unique Structural Design
Transparent Cover for Nameplate – Allows easy identification without disassembly, improving maintenance efficiency.
Lead Seal Hole – Prevents tampering, ensuring security and compliance in utility metering.
Two Installation Options – Supports panel fixing, and busbar direct mounting, offering flexibility across different applications.
3. Wide Current Range (5A – 1000A)
Covering low to high current measurements.
Suitable for commercial, industrial, and utility-scale power systems.
4. Robust & Reliable Construction
High-quality silicon steel or nanocrystalline core for low losses and high linearity.
Self-extinguishing Class V0 casing for enhanced safety.
- Proven Expertise – A decade of R&D ensures top-tier performance.
- Customizable Options – Multiple installation methods and accuracy classes.
- Tamper-Proof Design – Lead seal hole enhances anti-theft compliance.
- Global Standards Compliance – Meets IEC and other certifications.
With DIXSEN's busbar type current transformers model ABO-B, customers gain a highly accurate, secure, and adaptable solution for modern power measurement needs.
|
Model |
Ratio(A) |
Burden(VA) |
|
|
Class:0.5S |
Class:0.5 |
||
|
ABO-B |
5/5 |
5 |
5 |
|
ABO-B |
10/5 |
5 |
5 |
|
ABO-B |
20/5 |
5 |
5 |
|
ABO-B |
30/5 |
5 |
5 |
|
ABO-B |
40/5 |
5 |
5 |
|
ABO-B |
50/5 |
5 |
5 |
|
ABO-B |
60/5 |
5 |
5 |
|
ABO-B |
80/5 |
5 |
5 |
|
ABO-B |
150/5 |
5 |
5 |
|
ABO-B |
200/5 |
5 |
5 |
|
ABO-B |
250/5 |
5 |
5 |
|
ABO-B |
300/5 |
5 |
5 |
|
ABO-B |
400/5 |
5 |
5 |
Dimension (mm)
https://www.dixsen.com/