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Current Transformer

Marsz Electricals > Products > Current Transformer
Product

Tape-Wound Current Transformers

MARSZ offers high-quality, reliable current transformers designed for accurate measurement and protection in electrical systems. Constructed with premium CRGO silicon steel cores and encased in durable resin, these transformers excel in performance and durability. Suitable for a wide range of applications including metering, protection, and control, MARSZ current transformers provide precise current measurement and are essential components for safe and efficient electrical systems.

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CONSTRUCTION

Robust Construction for Reliable Power Delivery

Core is made from best grade imported cold rolled grain oriented silicon steel lamination. Laminations are cut at an angle of 45°C. Interleaved & mitered joints reduce the core losses & magnetizing current. Core is clamped with steel channel rigidly to reduce the cartile sound level.

Windings are designed to optimize dynamic, thermal Mechanical & Electrical strives depending upon the current & voltage requirement. The coils are wound with electrolytic grade high conductivity annealed wire & stripe covered with high quality insulation. Colling ducts are provided between windings & oil to minimize hot spot temperature & temp gradient.

Interior & Exterior surface are cleaned by chemical & coated with red oxide & 2 final coat of paint outside of tank body is coated for better & long life.

Core is made from best grade imported cold rolled grain oriented silicon steel lamination. Laminations are cut at an angle of 45°C. Interleaved & mitered joints reduce the core losses & magnetizing current. Core is clamped with steel channel rigidly to reduce the cartile sound level.

Windings are designed to optimize dynamic, thermal Mechanical & Electrical strives depending upon the current & voltage requirement. The coils are wound with electrolytic grade high conductivity annealed wire & stripe covered with high quality insulation. Colling ducts are provided between windings & oil to minimize hot spot temperature & temp gradient.

Interior & Exterior surface are cleaned by chemical & coated with red oxide & 2 final coat of paint outside of tank body is coated for better & long life.

Suggested Burden Guide

Reliable Current Transformers for Protection

  • Moving Iron Ammeters 1.5 VA to 5 VA
  • Recording Ammeters 2 VA to 10 VA
  • Recording Thermal Demand Wattmeters 0.7 VA to 1.4 VA
  • KWH Meters 0.3 VA to 0.6 VA
  • Thermal Demand Ammeters 3 VA
  • Thermal Maximum Demand Ammeters 4 VA to 8 VA
  • Cable 7/029 5 Amp Secondary 0.05 VA/ft
  • Cable 7/029 1 Amp Secondary 0.002 VA/ft

Applications

  • Suitable for Ammeters.
  • Power Factor meters and Protective Relays.

Specifications

  • Designed in accordance to : BS 3938, IS 2705 and IEC 185
  • Dielectric Test : 2500 V/4000 V r.m.s.
  • Temperature range : -40 to + 70C Ambient
  • Rated Frequency : 50/60 Hz
  • Line Voltage : 660/11000 Volts max
  • Test Voltage : 2500 Volts / 4000 V r.m.s.
FAQS

MARSZ Current Transformers: FAQs

01. What are the key factors to consider when selecting a current transformer?

When choosing a current transformer, several factors are crucial:

  • Primary current rating: The transformer must be capable of handling the expected current flow.
  • Secondary current rating: The secondary current should match the requirements of the connected metering or protection device.
  • Accuracy class: The transformer’s accuracy class determines its suitability for specific applications.
  • Burden: The total impedance of the secondary circuit, including the connected devices, should be within the transformer’s specified burden.
  • Installation environment: The transformer’s construction and insulation should be appropriate for the operating conditions.

Proper installation and grounding of a current transformer are essential for safety and accurate performance. The secondary circuit must always be grounded to prevent dangerous high voltages from occurring when the secondary is open-circuited. Additionally, correct installation ensures that the transformer operates within its specified parameters and provides reliable measurements.

MARSZ current transformers undergo rigorous testing and calibration to meet specified accuracy classes. The use of high-quality materials and precise manufacturing processes contributes to the overall accuracy of the product.

We are always ready to help you and answer your questions

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