TUNKIA’s Advanced Harmonic Transformer Calibration Solutions-Part 2

Inquire

1. Introduction to TUNKIA’s Advanced Harmonic Transformer Calibration Solutions

TUNKIA’s Advanced Harmonic Transformer Calibration Solutions

This system adopts a dual-channel digital sampling method, which can refer to the calibration procedures outlined in JJG 1177-2021 to meet the requirements for ratio error, phase displacement, and harmonic performance of voltage transformers in the wide frequency range of 10 kV, 50 Hz to 3 kHz. Similarly, it can refer to JJG 1176-2021 calibration procedures to fulfill the requirements for ratio error, phase displacement, and harmonic performance of large current transformers in the wide frequency range of 600 A, 50 Hz to 3 kHz. These procedures are intended for evaluating the performance and accuracy testing of high-voltage and high-current measuring devices used in power systems rated at 0.1 class and below.

Table 1 Test Items That Can Be Completed by The Test System

	Power Frequency Output/Measurement	Harmonic Function	Remarks
JJG 1177-2021	• Fundamental error measurement • Stability test	• Measurement of fundamental wave superimposed harmonic error	• Fundamental wave 50 Hz, • Highest harmonic 50th
JJG 1176-2021	• Fundamental error measurement • Stability test • Magnetic saturation margin test	• Single harmonic error measurement	• Fundamental wave 50 Hz, • When the highest harmonic is 50th, the harmonic current accounts for >10%
Test System	• Basic error measurement • Stability test • Operation variation test • Magnetic saturation margin test	• Single harmonic error measurement • Single/multiple harmonic superposition measurement	• Frequency 50 Hz～3 kHz, • Supports 2nd to 50th harmonics • Harmonic current ratio >10% at 50th

2. System Composition - Harmonic Voltage and Current Transformer Test System

Harmonic Voltage Transformer Test System

1. Wideband Source Cabinet	2. Signal source: Signal generation, output settings
	3. Power amplifier: Amplifies voltage signals
4. Step-up Transformer	Step-up output, up to 12 kV
5. Transformer Under Test	Capable of testing 0–10 kV, 50 Hz–3 kHz
6. Voltage ratio standard (class 0.02)	Including 10 kV, 1 kV, and 200 V specifications, 50 Hz–3 kHz
7. Metering Cabinet	8. Calibrator (class 0.02): Dual channel, 50 Hz ~ 3kHz
	9. Voltage divider: 100:5 voltage divider ratio
Note: The above constitutes a single set of voltage transformer testing system accessories. If a complete set of voltage/current transformer testing systems is assembled, the signal generator component in the signal source cabinet can be shared. When voltage and current transformers are not being tested simultaneously, the power amplifier component in the signal source cabinet can also be shared.

Harmonic Current Transformer Test System

1. Wideband Source Cabinet	2.Signal source: Signal generation, output settings
	3. Power amplifier: Amplifies current signals
4. Current Booster	Step-up output, up to 600 A
5. Transformer Under Test	Capable of testing 0 ~ 600A, 50 Hz–3 kHz
6. Current ratio standard (class 0.02)	Including 600 A, 100A, 20 A, 5 A specifications, 50 Hz–3 kHz
7. Metering Cabinet	8. Calibrator (class 0.02): Dual channel, 50 Hz ~ 3kHz
	9. Shunt: I/V conversion
Note: The above constitutes a single set of current transformers testing system accessories. If a complete set of voltage/current transformer testing systems is assembled, the signal generator component in the signal source cabinet can be shared. When voltage and current transformers are not being tested simultaneously, the power amplifier component in the signal source cabinet can also be shared.

3. Application of Harmonic Voltage and Current Transformer Testing System

The Application of Harmonic Voltage Transformer Testing System

TUNKIA’s Advanced Harmonic Transformer Calibration Solutions

• Test Items: Fundamental error, single harmonic error, fundamental superimposed harmonic error, multiple superimposed harmonic error

• The harmonic voltage transformer is tested using a dual-channel digital sampling method.

• Wideband voltage source: 0–10 kV, fundamental frequency: 50 Hz / 60 Hz, with the ability to set 2nd–50th harmonic overlays.

• Testing software: Users can customize testing protocols, including basic error measurement, stability tests, operational deviation tests, magnetic saturation tests, single harmonic tests, fundamental wave superimposed harmonic tests, etc., to achieve automatic testing of the measurement performance of harmonic voltage transformers.

The Application of Harmonic Current Transformer Testing System

TUNKIA’s Advanced Harmonic Transformer Calibration Solutions

• Test Items: Fundamental error, single harmonic error, fundamental superimposed harmonic error, multiple superimposed harmonic error

• The harmonic current transformer is tested using a dual-channel digital sampling method.

• Wideband current source: 0–600 A, fundamental frequency: 50 Hz / 60 Hz, with the ability to set 2nd–50th harmonic overlays.

4. Layout and Power Supply

TUNKIA’s Advanced Harmonic Transformer Calibration Solutions

Dimensions	Single Cabinet	800 mm(W) x 800 mm(D) x 2100 mm(H)
	System footprint	6000 mm(L) x 2200 mm(W)
	Recommended Laboratory Area	7500 mm(L) x 5000 mm(W)

Power Supply	Signal Source Cabinet	Three-phase five-wire system, AC 380 V ± 38 V, 50 Hz ± 2 Hz, ≤16 A
	Measurement Cabinet	Single-phase, AC 220 V ± 22 V, 50 Hz ± 2 Hz
	Other Supporting Equipment, Computers, Printers, etc.	Single-phase, AC 220 V ± 22 V, 50 Hz ± 2 Hz

5. Equipment List of Harmonic Voltage and Current Transformer Testing System

Equipment	Specification	Qty
Harmonic Voltage Transformer Testing System
High-stability Harmonic Voltage Source	• Output voltage up to 12 kV; • Frequency range 50 Hz to 3 kHz; • Automatic software control.	1 set (including signal source, power amplifier, step-up transformer)
10 kV Wideband Voltage Ratio Standard	• Maximum primary voltage specifications 10 kV, • 1 kV, 200 V; • Frequency range 50 Hz～3 kHz; • Accuracy better than 0.02% @ 50 Hz; • Ratio difference better than 0.1% @ 50 Hz～3 kHz; • Angular difference better than 0.001 rad @ 50 Hz～3 kHz.	3 sets
Wideband High-accuracy Transformer Tester	• Dual channel input; • Frequency range 50 Hz～3 kHz; • Accuracy better than 0.02% or 0.6’ @ 50 Hz～3 kHz; • Rated input voltage: 50 mV～6 V (RMS).	1
Auxiliary Equipment	• Contains programmable voltage transformer load box, voltage divider, test cables, adapter terminals, cabinets, programmable control software, etc.	1 set
Harmonic Current Transformer Test System
Wideband High-Current Harmonic Source	• Output current 1A～600A; frequency range 50 Hz～3 kHz; • Automatic software control.	1 set (including signal source, power amplifier, current booster)
Wideband Current Ratio Standard	• Maximum primary current specifications 5 A, 20 A, 100 A, 600 A; • Rated secondary current 1 A; • Frequency range 50 Hz ~ 3 kHz; • Ratio difference better than 0.02% @ 50 Hz～3 kHz; • Angular difference better than 0.6’ @ 50 Hz～3 kHz.	4 sets
Wideband Standard Shunt	• Nominal output: 1 V; • Resistance: 1 Ω or 0.2Ω • Frequency range: 50 Hz ~ 3 kHz; • Accuracy better than 0.02% or 0.6’ @ 50 Hz to 3 kHz.	2
Wideband High-Accuracy Transformer Calibrator	• Dual channel input; • Frequency range 50 Hz～3 kHz; • Accuracy better than 0.02% or 0.6’ @ 50 Hz～3 kHz; • Rated input voltage: 50 mV～6 V (RMS).	1
Auxiliary Equipment	• Contains programmable current transformer load box, test cables, transfer terminals, cabinets, programmable control software, etc.	1 set

Equipment	Specification	Qty
Harmonic Voltage and Current Transformer Comprehensive Test System
High-Stability Harmonic Voltage Source	• Output voltage up to 12 kV; frequency range 50 Hz ~ 3 kHz; • Automatic software control.	1 set (including signal source, power amplifier x2, step-up transformer, current booster)
Wideband High-Current Harmonic Source	• Output current 1A to 600 A; frequency range 50 Hz ~ 3 kHz; • Automatic software control.
10 kV Wideband Voltage Ratio Standard	• Maximum primary voltage specifications 10 kV, 1 kV, 200 V; • Frequency range 50 Hz ~ 3 kHz; • Accuracy better than 0.02% @ 50 Hz; • Ratio difference better than 0.1% @ 50 Hz ~ 3 kHz; • Angular difference better than 0.001 rad @ 50 Hz ~ 3 kHz.	3 sets
Wideband Current Ratio Standard	• Maximum primary current specifications 5 A, 20 A, 100 A, 600 A; • Rated secondary current 1 A; • Frequency range 50 Hz ~ 3 kHz; • Ratio difference better than 0.02% @ 50 Hz ~ 3 kHz; • Angular difference better than 0.6’ @ 50 Hz ~ 3 kHz.	4 sets
Wideband Standard Shunt	• Nominal output: 1 V; • Resistance: 1 Ω or 0.2Ω • Frequency range: 50 Hz ~ 3 kHz; • Accuracy better than 0.02% or 0.6’ @ 50 Hz ~ 3 kHz.	2
Wideband High-Accuracy Transformer Calibrator	• Dual channel input; • Frequency range 50 Hz ~ 3 kHz; • Accuracy better than 0.02% or 0.6’ @ 50 Hz ~ 3 kHz; • Rated input voltage: 50 mV ~ 6 V (RMS).	1
Auxiliary Equipment	• Includes programmable voltage/current transformer load box, voltage divider, test cable, transfer terminal, cabinet, programmable control software, etc.	1 set

Harmonic Transformer Harmonic Transformer test Harmonic Transformer testing Harmonic voltage Transformer Harmonic current Transformer how to test Harmonic Transformer Transformer Calibration Transformer Calibration Solutions Application of Harmonic Voltage and Current Transformer Testing System Composition of Harmonic Voltage and Current Transformer Test System

TUNKIA’s Advanced Harmonic Transformer Calibration Solutions-Part 2

1. Introduction to TUNKIA’s Advanced Harmonic Transformer Calibration Solutions

2. System Composition - Harmonic Voltage and Current Transformer Test System

3. Application of Harmonic Voltage and Current Transformer Testing System

4. Layout and Power Supply

5. Equipment List of Harmonic Voltage and Current Transformer Testing System

SIGN UP FOR NEWSLETTER

INFORMATION

PRODUCT CATEGORY

CONTACT US