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CR-3 Tap Changer

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The CR-3 is designed for single-phase voltage regulators, enabling tap adjustments without interrupting power supply. Engineered in-house, it provides mechanically robust and precise operation, compliant with IEC, IEEE, and ABNT standards. Rated up to 668 A, it supports reliable performance in distribution and industrial applications requiring continuous operation.

Role of Tap Changers in Voltage Control

The on-load tap changer adjusts the regulator winding ratio, enabling voltage regulation without service interruption. By selecting different winding taps, it raises or lowers voltage in response to grid conditions, maintaining values within the range defined by the electronic controller. Motor-driven actuation ensures precise and automatic positioning based on system demand.

Applications in Single-Phase Voltage Regulators

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  • Power Distribution 
    Urban and rural feeders with voltage drop or load variation
  • Industrial Facilities
    Operations requiring stable voltage control
  • Oil & Gas
    Systems requiring high service continuity

Technical Differentiators and Operational Reliability

  • Position synchronization between tap changer and TSEA electronic controllers via resistive measurement
  • Mechanically robust design supporting consistent switching precision over extended operating cycles
  • Compliance with IEC, IEEE, and ABNT standards, meeting defined mechanical, thermal, and dielectric requirements
  • Engineering-led technical support throughout the asset lifecycle
  • Designed for up to 1,000,000 operations before major overhaul

Regulatory Compliance and Integration

The CR-3 Tap Changer complies with applicable IEC, IEEE, and ABNT standards. It integrates with TSEA single-phase voltage regulators and electronic controllers, forming a coordinated solution for voltage regulation and grid automation.

Technical Specifications

  • Type:
    On-load rotary tap changer for single-phase voltage regulators, spring-driven mechanism with motor actuation

     

  • Current Capacity:
    Up to 668 A

     

  • Operation:
    On-load

     

  • Operation Time per Position:
    4 seconds

     

  • Operation Time (Neutral to Maximum Position):
    64 seconds

     

  • Operations Before First Contact Inspection:
    150,000 operations

     

  • Operations Before Major Overhaul:
    Up to 1,000,000 operations

     

  • Standards:
    IEC 60076-21:2018
    IEEE Std C57.15-2017
    ABNT NBR 11809:1991

  • Mounting:
    Integrated into TSEA single-phase voltage regulators

Frequently
Asked Questions

What is the function of the TSEA CR-3 Tap Changer?

It enables on-load tap switching in single-phase voltage regulators, supporting uninterrupted voltage regulation.

What is the operation time per position?

4 seconds per tap position.

What is the current capacity of the CR-3 Tap Changer?

Up to 668 A, according to design and test parameters.

Does the CR-3 Tap Changer comply with applicable standards?

Yes. It is designed in accordance with IEC 60076-21, IEEE Std C57.15, and ABNT NBR 11809.

What is the expected service life?

Designed for up to 1,000,000 operations before major overhaul. Preventive maintenance intervals specified in the technical manual must be followed.

Is the CR-3 compatible with third-party electronic controllers?

Compatibility must be evaluated on a case-by-case basis. Technical consultation is recommended to ensure proper integration.

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TSEA engineer