China Y2 Series Current Transformer - Reliable Suppliers and Factory for Power Monitoring Solutions
⚡ 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
Essential for accurate energy metering in industrial and commercial applications.
Good Linearity
Minimizes measurement error across the full operating range.
Insulation Strength
Maintains high voltage isolation between windings for safe operation.
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 harm electrical devices and endanger personnel.
To summarize, current transformers are critical for ensuring the dependability, efficacy, and safety of modern electrical systems because they allow more accurate current monitoring and enhanced fault protection.
📋 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 | |||||
❓ Frequently Asked Questions
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 measuring or protection devices. The CT steps down high primary currents to a safe, measurable secondary current — typically 1A or 5A — proportional to the primary current via the transformation ratio.
Why should the secondary winding of a CT never be left open-circuited?
When the secondary winding of a CT is open-circuited during operation, the magnetic flux in the core is no longer balanced by the secondary current. This causes the core to saturate and generates dangerously high voltages across the secondary terminals, which can damage insulation, destroy connected equipment, and pose a serious safety risk to personnel.
What are the key performance requirements for a Current Transformer?
The three primary performance requirements for a CT are: High Precision — to ensure accurate energy metering; Good Linearity — to minimize measurement errors across the operating range; and Insulation Strength — to safely isolate the high-voltage primary circuit from the low-voltage secondary measurement circuit.
What is the rated secondary current for the Y2 series Current Transformers?
The Y2 series Current Transformers have a rated secondary current of 0.5mA. This low secondary current output is suitable for interfacing with sensitive measurement and protection devices in modern electrical systems.
Which Y2 series model is suitable for circuits with currents up to 630A?
The Y2-100 model is designed for main loop currents up to 630A, with an outline size of 100mm and overall dimensions of 162 × 142 × 28 × 152mm. It is the largest model in the Y2 series and suitable for high-current industrial applications.
What role do Current Transformers play in electrical system safety and protection?
Current Transformers are essential safety components in modern electrical systems. They allow protective relays and monitoring devices to accurately measure high currents without direct exposure to hazardous voltages. By enabling precise fault detection and current monitoring, CTs significantly enhance the dependability, efficiency, and overall safety of electrical infrastructure.