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MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit
MR Type Current Transformer Unit

MR Type Current Transformer Unit

  • Frequency：50/60Hz
  • Rated Input：30A-5000A
  • Rated Output：1A,5A
  • Measuring range：5%In-120%In
  • Ratio Voltage：0.72KV (AC)
  • Dielectric strength：3.0KV/1mA/1min
  • Insulation Resistance：DC500V/100MΩ min
  • Case：PC/UL94-V0
  • Bobbin：PBT
  • Core：Silicon steel

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Current Transformer unit Introduction to MR Series: Revolutionizing Current Measurement and Protection

In the realm of electrical engineering, the MR series current transformer stands as a remarkable innovation, catering to diverse applications such as current measurement, monitoring, and protection for electrical wiring and equipment. This indispensable device serves a crucial purpose in transforming high AC currents into smaller, more manageable values. With its primary winding, secondary winding, magnetic core, and insulated body, the MR current transformer unit presents a comprehensive solution for accurate and efficient current management.

One notable advantage of the MR series current transformer lies in its versatility. Designed to adapt to various electrical setups, it offers the flexibility of connecting with both cables and bus bars. This adaptability ensures seamless integration within different power distribution systems, making the MR current transformer a preferred choice for engineers and technicians alike.

When it comes to precision, the accuracy class of a measuring current transformer plays a pivotal role. The accuracy class is determined by the highest permissible percentage current ratio error at the rated current prescribed for the specific accuracy class. In the case of the MR current transformer, accuracy classes such as 0.5, 1.0, and 3.0 are available, offering engineers the opportunity to select the appropriate level of accuracy for their particular requirements.

The applications of the MR series current transformer unit are extensive and diverse. Not only does it serve as a crucial tool for current measurement, but it also plays a vital role in monitoring and protecting electrical wiring and equipment. Additionally, this device finds utility in measuring current, power, and energy consumption in electric motors, lighting systems, air compressors, heating systems, and ventilation setups. Furthermore, the MR current transformer serves as a reliable component in relay protection devices, ensuring the safe operation of electrical systems and preventing potential damage.

With its wide-ranging capabilities, the MR series current transformer unit has become an indispensable asset in the realm of electrical engineering. Its ability to convert high AC currents into manageable values, combined with its adaptability, accuracy, and multifaceted applications, make it an essential tool for professionals seeking reliable and efficient current measurement and protection solutions. As the demand for precise and effective electrical management continues to grow, the MR current transformer unit emerges as a pioneering device, driving progress in the field and revolutionizing current measurement and protection practices.

Features:

  • The accuracy class is designed by the highest permissible percentage current (ratio) error at the rated current perscribed for the accuracy class concerned.
  • The  Electronic Transformer s the standard sillicon steel core models,tape wrapping current transformer, low cost.
  • The  measuring current transformers can be used with or without foot and plastic cover.

Applications:

  • Current measurement, monitoring and piotection for electrical wiring and equipment.
  • Current and power measurement for electric motors, lighting, air compressor, heating and ventilation system,air-condition equipment and automation-control system.
  • Current, power and energy monitoring device.
  • Relay protection device.
Electrical Parameter Mechanical Parameter
Frequency 50/60Hz Case PC/UL94-V0
Rated Input 30A-5000A Bobbin PBT
Measuring range 5%In-120%In Core Silicon steel
Rated Output 1A,5A Construction Screw
Ratio Voltage 0.72KV (AC) Operating Temp －25℃～＋75℃
Dielectric strength 3.0KV/1mA/1min Operating Humidity ≤85%
Insulation Resistance DC500V/100MΩ min Output Connection Terminal
Model Primary / Secondary Busbar Hole Dimensions(mm) Rated Burden (VA) Accuracy Class Rated Voltage
RCT-35 30/5A~300/5A φ=35mm 1.5~10 0.5 / 1.0 0.72KV(AC)
RCT-58 300/5A~1200/5A φ=58mm 2.5~15 0.5 / 1.0 0.72KV(AC)
RCT-90 800/5A~1600/5A φ=90mm 5~15 0.5 / 1.0 0.72KV(AC)
RCT-110 1000/5A~3000/5A φ=110mm 10~20 0.5 / 1.0 0.72KV(AC)
RCT-130 2000/5A~6000/5A φ=130mm 20~30 0.5/ 1.0 0.72KV(AC)
Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-28 50/5A – 1.5
60/5A – 1.5
75/5A – 1.5
100/5A 1.5 2.5
50/1A – 1.5
60/1A – 1.5
75/1A – 1.5
100/1A 1.5 2.5
Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-40 100/5A 1.5 2.5
150/5A 1.5 2.5
200/5A 2.5 5
250/5A 3.75 5
300/5A 3.75 5
100/1A 1.5 2.5
150/1A 1.5 2.5
200/1A 2.5 5
250/1A 3.75 5
300/1A 3.75 5
Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-42 100/5A 1.5 2.5
150/5A 1.5 2.5
200/5A 2.5 5
250/5A 3.75 5
300/5A 3.75 5
100/1A 1.5 2.5
150/1A 1.5 2.5
200/1A 2.5 5
250/1A 3.75 5
300/1A 3.75 5
Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-45 250/5A 3.75 5
300/5A 5 7.5
400/5A 5 7.5
250/1A 3.75 5
300/1A 5 7.5
400/1A 5 7.5
Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-60 300/5A 3.75 5
400/5A 5 7.5
500/5A 5 10
600/5A 7.5 10
800/5A 7.5 10
300/1A 3.75 5
400/1A 5 7.5
500/1A 5 10
600/1A 7.5 10
800/1A 7.5 10
Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-70 600/5A 5 1
800/5A 7.5 10
1000/5A 10 15
1200/5A 10 15
1500/5A 10 15
1600/5A 10 15
600/1A 5 10
800/1A 7.5 10
1000/1A 10 15
1200/1A 10 15
1500/1A 10 15
1600/1A 10 15
Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-85 600/5A 5 10
800/5A 7.5 10
1000/5A 10 15
1200/5A 10 15
1500/5A 10 15
1600/5A 10 15
600/1A 5 10
800/1A 7.5 10
1000/1A 10 10
1200/1A 10 10
1500/1A 10 10
1600/1A 10 10
Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-125 2000/5A 15 20
2500/5A 15 20
3000/5A 15 20
4000/5A 20 30
5000/5A 20 30
2000/1A 15 20
2500/1A 15 20
3000/1A 15 20
4000/1A 20 30
5000/1A 20 30

Diagram

MR-28

MR-40

MR-42

MR-45

MR-60

SDH-70

MR-85

MR-125

FAQ

1. How do I select the right MR current transformer for my application?

Select an MR current transformer based on the primary current, required secondary output, accuracy class, rated burden and installation dimensions. Check that the window accommodates your cable or busbar and that the overall dimensions fit your panel. Send HEYI your requirements for model selection support.

2. Should I choose a 1A or 5A secondary output?

Choose the secondary output that matches your energy meter or measuring instrument. MR current transformers offer 1A and 5A options. For longer secondary cable runs, a 1A output can reduce cable burden, provided the connected instrument accepts a 1A input.

3. What accuracy classes and rated burdens are available for MR current transformers?

The MR specification tables list Class 0.5 and Class 1.0 options, with rated burden varying by model and current ratio. Specify the required accuracy and VA when ordering. The connected instrument and secondary wiring must be considered when checking the total burden.

4. Can MR current transformers be used with both cables and busbars?

MR current transformers can accommodate cables or busbars when the conductor dimensions match the selected model’s window. Before ordering, check the window dimensions, mounting arrangement and available panel space. Provide your cable outside diameter or busbar width and thickness so HEYI can help confirm the fit.

5. What information is needed for an MR current transformer quotation?

Please provide the current ratio, 1A or 5A secondary output, accuracy class, rated burden in VA and order quantity. Include the preferred model or conductor dimensions, installation requirements and any required certificates or test reports. These details help HEYI prepare an accurate quotation.

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