CR-10 Tap Changer
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 according to grid conditions, maintaining output within the range defined by the electronic controller. Motor-driven actuation ensures precise and automatic positioning in response to system variations.
CR-10 Actuation Mechanism
The CR-10 features a spring-driven mechanism in which a motor charges the springs and releases stored energy during tap change.
This design enables high-speed transition between taps, reducing arcing time and supporting operational safety.
The transmission system (chain drive) ensures that once contact movement begins, the switching sequence is completed independently of the motor, minimizing the risk of contact erosion.
With a simplified mechanical architecture and defined end-stop limits, the mechanism supports consistent and controlled tap operation over extended service life.
Control and Monitoring Signals
The CR-10 tap changer is equipped with three micro-switches for operation counting, neutral position indication, and polarity reversal, in addition to a position sensor and an External Mechanical Indicator (EMI).
The operation counter generates an electrical pulse at each tap change, enabling lifecycle tracking based on total switching operations.
Neutral position and polarity signals provide operational status to the control system, supporting safe and controlled operation.
A resistive position sensor (potentiometric disc) provides electrical tap position feedback, ensuring synchronization between the tap changer and the electronic controller.
The External Mechanical Indicator offers real-time mechanical position indication, allowing position verification even when the regulator is de-energized.
Applications in Single-Phase Voltage Regulators
- Power Distribution
Urban and rural feeders with voltage drop or load variation - Industrial Facilities
Processes requiring stable voltage control - Critical Systems
Applications requiring high service continuity - Electrical Substations
Medium-voltage regulation - Large Energy Consumers
Industrial plants and high-load systems
Technical Differentiators and Operational Reliability
- Position synchronization between the 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 NBR 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
Technical Specifications
Type:
On-load rotary tap changer for single-phase voltage regulators, spring-driven mechanism with motor actuationCurrent Rating:
Up to 1,100 AOperation:
On-loadOperation Time per Position:
6 secondsOperation Time (Neutral to Maximum Position):
96 secondsOperations Before First Contact Inspection:
150,000 operationsOperations Before Major Overhaul:
Up to 1,000,000 operationsStandards:
IEC 60076-21:2018
IEEE Std C57.15-2017
ABNT NBR 11809:1991- Mounting:
Integrated into TSEA voltage regulators
Frequently Asked Questions
What is the function of the CR-10 Tap Changer?
It enables on-load tap switching in single-phase voltage regulators, supporting uninterrupted voltage regulation.
What is the operation time per position?
6 seconds per tap position.
What is the current rating of the CR-10 Tap Changer?
Up to 1,100 A, designed for higher-current voltage regulator applications.
Does the CR-10 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-10 compatible with third-party electronic controllers?
Compatibility must be evaluated on a case-by-case basis. Technical consultation is recommended to ensure proper system integration.
