CTY2 Series Current Transformer - Reliable Power Monitoring from China Suppliers & Factory
Product Overview
A CT employs electromagnetic induction and consists of two windings: a main winding with a few turns linked in series to a high-current circuit and a secondary winding with several turns connected to safety or measurement devices. The secondary winding, which is normally tuned to 5A or 1A for the bulk of industrial applications, receives very little current, whereas the main winding receives a lot. This proportionality, also known as the transformation ratio, protects people and equipment from unsafe voltages while allowing for accurate current monitoring.
CTs require high precision for energy metering, linearity to minimize measurement error, and enough insulation to sustain a high voltage between windings. Lastly, since they enable more precise current monitoring and problem diagnosis, current transformers are essential to the reliability, efficiency, and safety of modern electrical systems.
Critical Safety Notice: When using a CT, the secondary winding should never be left open circuit. This is because an open circuit has the potential to produce extremely high voltages that might damage electrical equipment.
Technical Parameters
| Type | Specification | (mm) Outline Size | |||||
|---|---|---|---|---|---|---|---|
| c | A | B | C | D | M | ||
| CTY2-30 | 60A/5A | 30 | 89 | 70 | 28 | 80 | c5*7 |
| CTY2-45 | OOA/5A | 45 | 104 | 85 | 28 | 95 | c5*7 |
| CTY2-65 | 250A/5A | 65 | 124 | 105 | 28 | 115 | c5*7 |
| CTY2-80 | 400A/5A | 80 | - | 122 | 28 | 132 | c5*7 |
| CTY2-100 | 630A/5A | 100 | 162 | 142 | 28 ln | 152 | c5*7 |
| Accuracy Grade: 1.0 | Overload Current: ≥1.2%ln | ||||||
Frequently Asked Questions
What is the main function of a Current Transformer (CT)?
A Current Transformer (CT) uses electromagnetic induction to step down high currents to a lower, safer level. This allows for accurate monitoring and protects safety or measurement devices from unsafe high voltages.
Why must the secondary winding of a CT never be left open circuit?
Leaving the secondary winding open circuit can produce extremely high voltages. These high voltages pose a severe safety hazard and can damage the electrical equipment connected to the circuit.
What are the typical secondary winding current ratings?
For the majority of industrial monitoring and safety applications, the secondary winding of a current transformer is standardly tuned to either 5A or 1A.
What performance qualities are required for CT energy metering?
CTs used in energy metering require high precision, excellent linearity to minimize measurement errors, and sufficient electrical insulation to withstand high voltages between the windings.
What are the accuracy and overload specifications for the CTY2 series?
The CTY2 series current transformers feature an Accuracy Grade of 1.0 and are rated for an Overload Current of ≥1.2%ln.