Precision Current Sensing Transformers

Hero Section: The Solution

Headline:

Custom Current Sensing Transformers: Precision Monitoring for Power Systems

Sub-headline:

Engineered for accurate signal detection in 50Hz/60Hz circuits. As a specialized Custom Transformer Manufacturer, we deliver Low-Frequency Transformers and Current Sensors with high turn ratios (e.g., 1:1000) and reinforced insulation, ensuring safety and precision in metering applications.

Key Highlights:

High Precision Sensing: Features high turn ratios (up to 1:2000) to convert high AC currents into readable low-voltage signals for MCUs.

Safety & Isolation: Designed with 1500Vac - 3000Vac dielectric strength to safely isolate low-voltage control circuits from high-voltage power lines.

Compact Reliability: The EI28 structure offers a robust, cost-effective platform for mass production of Instrument Transformers.

Request a Quote for Your Specs

Reference Case Study: Model PTX00EI28-125MINa 1000-turn secondary winding (0.11mm wire) to accurately detect currents flowing through the 1-turn primary windings (1.0mm wire). The high inductance (>1.2H) ensures excellent signal fidelity at low frequencies.

Note: The specifications below are from our production model PTX00EI28. This demonstrates our manufacturing capability for Precision Current Sensing Transformers.

Engineer's Insight: The PTX00EI28 is a dedicated sensing component. It uses

Tailor This Transformer to Your Needs

We customize Low Frequency Transformers for metering, protection, and control.

Sensing vs. Power Application

● Current Sensing (CT): As seen in the reference, we optimize for Turn Ratio Accuracy and Phase Shift. We use high-permeability Silicon Steel or Permalloy cores to ensure linearity at 50/60Hz.

● Voltage Sensing (PT): We can also design Potential Transformers (Zero Phase CTs) for voltage monitoring, utilizing thousands of turns of ultra-fine wire (0.03mm - 0.05mm).

Structure & Material

● Primary Winding: Options for Integrated Primary (pins on bobbin) for lower currents (< 20A) or Through-Hole (busbar pass-through) for high currents (> 50A).

● Encapsulation: While the reference is Varnish Impregnated, we offer Epoxy Potting for enhanced environmental protection and vibration resistance in industrial applications.

Industries We Serve

Typical applications for our Low-Frequency Sensing Transformers.

Quality Assurance & Testing

Strict verification for Precision Instruments.

1. Ratio Accuracy: 100% verification of Input/Output ratio (e.g., 1:1000).
2. Phase Error: Tested to ensure minimal phase displacement for accurate power calculation.
3. Hi-Pot Isolation: 1500Vac tested for 60 seconds to guarantee isolation barrier integrity.
4. DCR & Inductance: Measured to ensure consistency in signal response.

Start Your Custom Project

Need a Precision Current Transformer?

Partner with a specialized Custom Transformer Manufacturer. Send us your requirements today.

♦ Step 1: Upload your datasheet or describe your specs (Ratio, Primary Current, Accuracy).

♦ Step 2: Our engineers select the optimal core material and winding structure.

♦ Step 3: Rapid prototyping (3-5 days) for your approval.

Upload Drawing / Contact Engineer