0102030405
Y2 Series Current Transformer from China Suppliers | Reliable CT Factory for Power Systems Monitoring
Product Overview
A CT is driven by electromagnetic induction and has two windings: a secondary winding (many turns linked to safety or measurement devices) and a primary winding (few turns connected in series with the high-current circuit). The secondary winding, which is normally defined at 5A or 1A for most industrial applications, receives a low current, whereas the primary winding receives a high current. This proportionality, also known as the transformation ratio, provides accurate current measurement while shielding workers and equipment from potentially hazardous voltages.
-
🎯High Precision Designed for energy metering with accurate current monitoring capabilities.
-
📐Good Linearity Minimizes measurement error for reliable and consistent readings.
-
🛡️Insulation Strength Maintains high voltage isolation between primary and secondary windings.
-
⚡Enhanced Fault Protection Enables accurate current monitoring and improved fault detection in modern electrical systems.
⚠️
Important Safety Notice: The secondary winding should never be open-circuited while using a CT. An open circuit may generate extraordinarily high voltages that can seriously harm electrical devices and pose safety risks to personnel.
Technical Parameters
| Type | Main Loop Current | (mm) Outline Size | ||||
|---|---|---|---|---|---|---|
| Y2-30 | <63A | 30 | 89 | 70 | 28 | 80 |
| Y2-45 | — | 45 | — | 85 | 28 | 95 |
| Y2-65 | <250A | 65 | 124 | 105 | 28 | 115 |
| Y2-80 | — | 80 | 142 | 122 | 28 | 132 |
| Y2-100 | <630A | 100 | 162 | 142 | 28 | 152 |
| Rated Primary Current: IA | Rated Secondary Current: 0.5mA | |||||
📌 All outline dimensions are in millimeters (mm). Specifications may vary by application requirements.
Frequently Asked Questions (FAQ)
Q
What is a Current Transformer (CT) and how does it work?
A Current Transformer (CT) operates on the principle of electromagnetic induction. It consists of a primary winding connected in series with the high-current circuit and a secondary winding linked to measurement or protection devices. The CT steps down high currents to a safe, measurable level (typically 1A or 5A) proportional to the primary current, enabling safe and accurate current monitoring.
Q
What are the rated secondary current values for this CT series?
The rated secondary current for this CT series is 0.5mA. For most standard industrial applications, CTs are typically rated at 1A or 5A on the secondary side, providing compatibility with a wide range of measurement and protection instruments.
Q
Why should the secondary winding of a CT never be left open-circuited?
If the secondary winding of a CT is left open-circuited while current flows through the primary, the transformer will attempt to drive the full primary current through an open loop. This results in extremely high voltage spikes that can damage insulation, destroy connected equipment, and create serious safety hazards for personnel. Always ensure the secondary is connected to a load or short-circuited when not in use.
Q
What main loop current ratings are available in the Y2 CT series?
The Y2 CT series supports a range of main loop current ratings: Y2-30 and Y2-45 support up to 63A; Y2-65 and Y2-80 support up to 250A; and Y2-100 supports up to 630A. This range makes the series suitable for a variety of industrial and commercial electrical applications.
Q
What key performance characteristics should a quality CT have?
A high-quality current transformer should exhibit three essential characteristics: high precision for accurate energy metering, good linearity to minimize measurement errors across the operating range, and strong insulation to safely isolate the high-voltage primary circuit from the low-voltage secondary measurement circuit and protect both equipment and operators.
Q
What is the transformation ratio in a current transformer?
The transformation ratio of a CT refers to the proportional relationship between the primary current and the secondary current. It is determined by the ratio of the number of turns in the primary winding to the secondary winding. This ratio ensures that the secondary current is always a precise, scaled-down representation of the primary current, enabling safe and accurate measurement without direct contact with high-current circuits.