TR Three-Phase High-Precision Split Core Open Type AC Current Transformer CT 400A~1200A/1A, 5A

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Product Description

📋 Basic Information
Model NO.
TRFK-50C
Phase
Single
Operation Condition
Indoor
Usage
Protection, Measurement
Winding Form
Small Fixed Type
Insulating Medium
Common Insulating Materials
Installation
Active Type
Magnetic Circuit Structure
Combined Type
Voltage Transformation
Electromagnetic Type
Rated Primary Current
400A~1200A
Rated Secondary Current
1A, 5A
Overload
1.2 Times
Aperture
50mm
Transport Package
Carton
Specification
HOLE 50
Trademark
TR
Origin
China
HS Code
850450
🔍 Product Description

Main Characteristics

  • The buckle structure is fixed and the stability is good
  • Adopt high magnetic permeability core, good linearity and high sensitivity
  • Terminal output, easy to install
Current Transformer Main
Current Transformer Detail
Current Transformer View

Applications

  • Rural power grid reconstruction project
  • Online environmental monitoring
  • Smart fire-fighting power consumption

Certificates

  • RoHS/REACH compliant
  • CE certificate
  • UL flame retardant rating 94-V0 (For the housing)
⚡ Electrical Parameters
ParameterValue
TypeTRFK-50C
Rated primary current400A~1200A
Rated secondary current1A, 5A
Overload1.2 times
Rated capacity1VA, 2.5VA, 3.75VA, 5VA, 10 VA
Aperture50mm
Secondary load≤ 0.2Ω
Ratio error @ rated primary±0.5%
Phase error @ rated primary≤60′
Working frequency50/60 Hz
AC isolation test (primary/secondary)3kV AC/1mA 10s
Operating temperature-25ºC~+75ºC
Storage temperature-40ºC~+85ºC
WeightAround 880g
🎯 Accuracy Parameters
Input current(A) 1%In 5%In 20%In 100%In 120%In
Ratio error(%) - ±1.5 ±0.75 ±0.5 ±0.5
Phase error(′) - ≤180 ≤90 ≤60 ≤60
Accuracy Chart

Example: For 200A/5A specification, when input is 200A, S1/S2 output (S1-S3 parallel, S2-S4 parallel). For 400A, S1/S4 output (S2-S3 series).

🛠️ Installation Instructions

⚠️ Warning: Please use professional protective equipment to prevent electric shock and ensure safety.

Step 1: Ensure power failure or use professional personnel for live installation.
Step 2: Connect wires to terminal output and measuring equipment.
Step 3: Open the transformer latch.
Step 4: Place cable inside, match current direction arrow, lock latch, and fix with nylon ties.
Installation Fig 1
Installation Fig 1 Detail
Installation Fig 2
Installation Fig 2 Detail
Installation Fig 3
Installation Fig 3 Detail
📐 Technical Drawings
Dimension 1
Dimension 2
Dimension 3
Full Specification Sheet
❓ Frequently Asked Questions
What is the rated primary current range for the TRFK-50C?
The rated primary current for this model ranges from 400A to 1200A.
What is the aperture size of this current transformer?
The TRFK-50C features a 50mm aperture, suitable for various cable sizes.
Can this transformer be used outdoors?
No, this specific model is designed for indoor operation conditions.
What safety certifications does the product hold?
The product is RoHS/REACH compliant, CE certified, and the housing has a UL flame retardant rating of 94-V0.
What is the operating temperature range?
The operating ambient temperature range is -25ºC to +75ºC.
What is the secondary output type?
The TRFK-50C uses a terminal output type for easy installation.

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