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CT/PT Calibration Services

CT/PT Calibration Services

Precision Transformation. Dependable Protection. Accuracy in Every Current & Voltage Ratio.

Sarvashree Calibration Pvt. Ltd. offers comprehensive and accredited CT/PT Calibration Services to verify the accuracy and performance of Current Transformers (CTs) and Potential Transformers (PTs). Our advanced facility and high-precision on-site calibration equipment support power utilities, substations, generating stations, switchgear manufacturers, and heavy industries. Utilizing high-accuracy reference standards and automated test sets, Sarvashree guarantees exact ratio verification, phase angle analysis, and full compliance with national and international quality standards.

Comprehensive Instrument Transformer Calibration

Accurate Calibration for Current Transformers (CTs) & Potential Transformers (PTs)

Ensure the accuracy and reliability of your Current Transformers (CTs) and Potential Transformers (PTs) with our comprehensive calibration services. Our advanced CT/PT calibration facility is equipped to verify the performance of instrument transformers used in power generation, transmission, distribution, industrial plants, electrical testing laboratories, and utility applications.

Using precision reference standards and advanced calibration systems, we deliver accurate, repeatable, and traceable calibration results that help maintain measurement integrity, improve operational reliability, and support regulatory and quality compliance.

CT Analyzer and Instrument Calibration Setup
Precision On-Site and Laboratory CT Analyzer Systems

Our CT/PT Calibration Capabilities

We provide calibration services for:

  • Calibration of CTs from 1A to 3200A / 5A - 1A.
  • Calibration of PTs from 220V to 33kV.
  • Calibration of High Voltage Equipment’s up to 100 kV AC 40 kV AC (i.e. High Voltage Testers, Oil Test Kits).
  • Calibration of Automatic CT, PT and CT- PT Test Sets.
  • Calibration of CT Burdens and PT Burdens.
  • Calibration of AC High Current Source up to 3200Amperes.
  • Calibration of Transformer turn Ratio meter.
Transformer and Ratio Testing
Ratio & High Voltage Verification

Calibration of Transformer Turn Ratio meters and Burden Box

Calibration Infrastructure

High Voltage CT PT Testing Chamber
Testing by Calibration

High-voltage bushing and potential transformer lab station.

Current Transformer Unit Testing
Primary Injection & CT Calibration

High-current injection standards up to 3200 Amperes.

Automated Field CT Analyzer
Automated Test Sets

Automated verification of ratio, burden, and excitation curve.

Calibration Parameters

Our calibration setup is capable of evaluating:

Ratio Accuracy

Precise evaluation of primary to secondary turns ratio accuracy.

Phase Angle Error

Verification of phase displacement and angular measurement error.

Excitation Characteristics

Assessment of magnetic core excitation and knee-point curves.

Burden Performance

Accurate testing across rated and operational secondary burden impedances.

Measurement Accuracy

Complete measurement accuracy verification as per applicable national and international standards.

Why Choose Our CT/PT Calibration Services?

  • High-accuracy calibration using precision reference standards
  • Traceable measurements with comprehensive calibration certificates
  • Experienced calibration engineers and technical specialists
  • Fast turnaround to minimize equipment downtime
  • Support for quality assurance, audits, and compliance requirements
  • Customized calibration solutions for utilities, industries, and testing laboratories

Industries We Serve

Our CT/PT calibration services support:

Power Utilities
Electrical Manufacturers
Power Generation Plants
Transmission & Distribution
Renewable Energy
Industrial Manufacturing
Testing Laboratories
EPC Contractors
Government & Research Organizations

Frequently Asked Questions

Current and Potential Transformers supply critical inputs to revenue metering and protection relays. Regular calibration ensures high ratio accuracy, validates phase angle errors, prevents metering losses, and ensures protection systems trigger reliably during electrical faults.

We calibrate Current Transformers (CTs) from 1A up to 3200A, and Potential Transformers (PTs) from 220V up to 33kV. We also calibrate high voltage testers and equipment up to 100 kV AC / 40 kV AC.

Yes, our mobile calibration teams are equipped with portable automated CT/PT test sets and high current/voltage sources to perform on-site testing for substations, generating stations, and industrial plants with minimal downtime.

Yes, all calibration measurements are traceable to national/international standards and accompanied by detailed calibration certificates detailing ratio errors, phase displacement, burden performance, and excitation characteristics.

Request a CT/PT Calibration Quote

Share your CT/PT specifications, voltage/current ratings, burden details, and Calibration location. Our technical team will provide a tailored calibration proposal and timeline.

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NABL Accredited Calibration Laboratory providing precise and reliable calibration services in Bangalore since 2014.

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SCPL - Bangalore
Registered Office & NABL Accredited Lab:
Sarvashree Calibration Pvt Ltd.
L-95, Kirloskar Colony 3rd Stage, 5th Cross, 1st Main, Water Tank Road, Basaveshwarnagar, Bangalore - 560079. Landmark: Near BBMP Ward Office.
+91 99646 04352 / 080 2322 3936
calibration@sarvashree.com

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SCPL - Mangalore

Marketing Office & Instrument Collection Center:
#2-106, Acharya Bhadavane, Kulai, Mangaluru - 575019. +91 96633 04352 mng.calibration@sarvashree.com

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