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Transformer Winding Resistance Ohmmeter

Name: Transformer Winding Resistance Ohmmeter
Brand: CANGZHOU KENUO INTERNATIONAL CO., LTD.
Price: 10000 USD
Availability: InStock

Price 10000 USD ($)/ Set

Get a Price/Quote

MOQ : 1 Unit

Transformer Winding Resistance Ohmmeter Specification

Low Voltage
Applicable to low voltage windings

Voltage Booster Type
Solid state controlled booster

Load Loss
Measures load losses based on resistance

Rated Voltage
Test voltage up to 30V DC

Capacity
Suitable for transformers up to 1000MVA

Dimension (L*W*H)
360 x 300 x 180 mm

Coil Material
Copper or aluminum compatible

Operating Temperature
-10C to +55C

Standard
IEC 60076-1, IS 2026

Cooling Type
Air-cooled

High Voltage
Applicable to high voltage windings

Product Type
Digital Winding Resistance Ohmmeter

Material
High impact ABS plastic housing

Output
Test current up to 10A

Frequency (MHz)
DC operation (0 MHz)

Efficiency
High accuracy measurement

Phase
Three phase and single phase supported

Usage
Measurement of transformer winding resistance

Coil Structure
Independent test leads for each winding

Coil Number
Supports measurement per winding

Power Scope
85-265V AC, 50/60Hz, internal rechargeable battery

Weight
Approx. 7 kg

Display Type
Large LCD digital display

USB Interface
Provided for PC connectivity

Measurement Modes
Manual and automatic test modes

Calibration
Factory calibrated and user accessible

Auto Demagnetization
Automatic demagnetization after test

Battery Backup
Operating time up to 10 hours on battery

Resolution
1

Safety Features
Overcurrent and thermal protection

Data Storage
Internal memory for up to 2000 results

Test Leads
Four-terminal Kelvin connection

Measurement Range
1 to 2000

Transformer Winding Resistance Ohmmeter Trade Information

Minimum Order Quantity
1 Unit

Supply Ability
10 Units Per Month

Delivery Time
60 Days

About Transformer Winding Resistance Ohmmeter

Transformer winding resistance ohmmeter

Description of winding resistance ohmmeter

This ZRS series transformer winding resistance ohmmeter is the newest instrument for measuring DC resistance of windings of big power transformers. It may measure three windings simultaneously!
There is auto-discharge circuit for operator safety.
For OLTC transformer, there dont need discharge. Test duration is only one third of those by conventional single-phase DC meter.
It adopts large-size LCD displayer, graphical interface displaying.
It is equipped with built-in thermal printer and big-capacity storage.
It is portable, light weight, not more than 13kg!

Main parameters

Code		ZRS-10A	ZRS-20A
Output current	Single-phase	1A,5A,10A, 20A	1A,5A,10A,20A,40A
	3-phase	1A, 5A, 10A	1A, 5A, 10A, 20A
Measuring range	Single-phase	1A: 10m~20 5A: 1m~4 10A: 1m~2 20A: 1m~1	1A: 10m~20 5A: 1m~4 10A: 1m~2 20A: 1m~1 40A: 1m~0.5
	3-phase	1A: 10m~6 (each phase) 5A: 1m~1 (each phase) 10A: 1m~0.6 (each phase)	1A: 10m~6 (each phase) 5A: 1m~1 (each phase) 10A: 1m~0.6 (each phase) 20A: 1m~0.3 (each phase)
Accuracy		+/- 0.2%
Resolution ratio		0.1
Working temperature		0~40
Relative humidity		90%
Electric power		AC220V,50Hz
Data storage		150 units

Precision Measurement Across Wide Range

Measure transformer winding resistances with exceptional accuracy, thanks to a high-resolution 1 display and a range that accommodates both power and distribution transformers. The Kelvin four-terminal connection ensures low-resistance measurements are unaffected by lead or contact resistance, resulting in highly accurate readings for diagnostics and quality assurance.

User-Friendly Interface and Data Management

Equipped with a large LCD panel and intuitive controls, this ohmmeter offers both manual and automatic test modes. The internal memory can store up to 2000 measurement results, allowing users to review past tests, while the USB port streamlines data transfer to PCs for archiving, reporting, or further analysis.

Safety and Durability Built In

Overcurrent and thermal protection guard against test hazards, and automatic demagnetization ensures safe transformer handling post-test. Housed in high-impact ABS plastic and designed for robust field use, the instrument operates reliably from -10C to +55C ideal for challenging environments.

FAQs of Transformer Winding Resistance Ohmmeter:

Q: How does the auto demagnetization feature benefit transformer testing?

A: The automatic demagnetization function removes residual magnetism after measuring, ensuring safe handling of the transformer and preventing malfunction during subsequent operation. It also makes the process faster and safer by eliminating manual intervention.

Q: What types of transformers and windings can this ohmmeter test?

A: It is designed for measurement of both single-phase and three-phase transformer winding resistances, compatible with copper or aluminum windings, and suitable for transformers up to 1000MVAspanning high and low voltage windings.

Q: When should a transformer winding resistance test be performed?

A: Testing should be conducted during routine maintenance, after repairs, on commissioning new transformers, or if abnormal transformer performance is suspected. Regular testing helps identify issues like winding damage or contact problems early.

Q: Where can the resistance data be stored and how can it be accessed?

A: The ohmmeter can store up to 2000 sets of resistance results in its internal memory. Data is easily accessed, reviewed, and transferred to a PC via the provided USB interface for further analysis and record-keeping.

Q: What is the process for connecting the test leads to a transformer?

A: Use the four-terminal Kelvin connection: two leads are for current injection and two for voltage measurement on each winding. This setup minimizes measurement errors caused by lead resistance and ensures accurate readings.

Q: How long can the device operate on its battery backup?

A: With the internal rechargeable battery, the instrument operates for up to 10 hours, providing extended measurement capability in field locations without immediate AC power access.

Q: What standards does the ohmmeter comply with?

A: This device adheres to international standards IEC 60076-1 and IS 2026, ensuring reliable operation, safety, and compatibility for global distribution and field testing requirements.

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