Transformer Winding Resistance Test Equipment

HMR40E transformer winding resistance test equipment is specially designed for the temperature rise measurement of three-core five-column large transformers. The charging and measuring speed is fast, and it can meet the time requirements of the transformer temperature rise test. Dual-channel measurement, real-time sampling, printout, and temperature The test is no longer a problem.

1. The instrument has large output current and high voltage.

2. Dual-channel measurement, measuring two resistance values at the same time.

3. It has a complete protection circuit and strong reliability.

4. The horizontal structure is convenient for on-site operation of the transformer factory.

5. With audible discharge alarm and clear discharge indication to reduce misoperation.

High-voltage side output current：<15mA、40mA、200mA、1A、5A、

Low-voltage side output current：2A、5A、10A、20A

Range：

High voltage side：

1mΩ～2Ω （5A）

5mΩ～10Ω （1A）

100mΩ～50Ω （200mA）

1Ω～250Ω （40mA）

10Ω～20kΩ （<15mA）

Low voltage side：

100μΩ～500mΩ （20A）

200μΩ～1Ω （10A）

1mΩ～1.6Ω （5A）

5mΩ～4Ω （2A）

Accuracy：±(0.2%+2字)

Resolution：0.1μΩ

Operating temperature：0～40℃

Ambient humidity: ≤90%RH, no condensation

power：AC220V±10%，50HZ±1HZ

Dimensions：448*463*177(mm)

net weight：17.6KG

Length of test line： 10m

1.The front panel of the instrument is shown in Figure 1.

Switch: This switch is the power switch, I press it means power on, O press means power off.

Display: 800×480 dot matrix liquid crystal display, displaying menus and measurement results.

Printer: Print test results.

2.The rear panel of the instrument is shown in Figure 2

1. The grounding pole is used for the grounding of the instrument shell and is a protective ground.

2. Power supply: 220V AC input port, power supply to the whole machine, power supply specification AC220V±10%, 50Hz.

3. Il+, Il-: Low-voltage side current output terminals.

4. IH+, IH-: High-voltage side current output terminals.

5. VL+, VL-: Low-voltage side voltage input terminals.

VH+, VH-: High-voltage side voltage input terminals.

V、Test and wiring method

Connection between the machine and the test product: Connect the test product to the test terminal of the machine through a dedicated cable, and the connection is firm, and the ground wire is connected.

a. The wiring method of single-channel measurement is shown in the figure below.

Single channel measurement wiring diagram

b. The wiring method of dual-channel measurement is shown in the figure below

Dual-channel measurement of high-voltage RAO, low-voltage Rac wiring diagram

1. It is necessary to wait for the discharge to end and the alarm sound stops before removing the wire, otherwise it is dangerous.

2. When measuring the no-load tapping transformer, the discharge must be reset before tapping, and the tapping point can be switched only after the alarm sound stops.

3. Refer to the test range when selecting the current, and do not use over-range or under-range. When using over-range, the instrument is always in the "charging" state because the current cannot reach the set value.

4. Pay attention to the range when using the magnetic method. Because the high-voltage coils are connected in parallel and in series, 1.5 times the resistance of the high-voltage coil is added to the entire test loop, which should be taken into account when selecting the range. If the output current cannot reach the set value or the output current is unstable if the range is exceeded.

5. When the short contacts of the three wires of the magnetic assist method are removed after the discharge is completed, there may be residual current, and may spark and discharge when removed. This is a normal phenomenon.

The instrument will be repaired free of charge for product quality problems belonging to the company within one year from the date of purchase, and lifetime warranty and technical services will be provided. If you find that the instrument is abnormal or malfunctions, please contact the company in time to arrange the most convenient solution for you and provide you with the fastest on-site service.

Founded in 2008 ,as predecessor is the State owned tertiary Enterprises enterprises. our primary business was sale, design and manufacture high-voltage transmission and insulation test set.

Our factory is located in Wuhan Huading Industrial Park, (Economic and Technological Development Zone Hubei), it covers area of more than 4000 square meters, the main products include: hipot tester, GIS PD test system, AC/DC high-voltage test transformer, primary current injection test set ,insulation resistance test meter, Insulation withstａnd voltage test device and other testing instruments. Products are mainly used in Power Supply department, Power plant, Power construction, Railways, Petroleum, Chemical, Metallurgy, Coal and other sectors.

The factor has continued to develop overseas markets in recent years, , and some of its best products have been exported to Europe, America, Southeast Asia and other countries, which are well received by customers.

Our factory has always put quality as the lifeline, product quality, working quality and service quality are in strict accordance with the ISO9001: 2015 management system.

Our factory will as always adhere to Truth-seeking, Refinement, Innovation, adhere to technology as an advantage, quality assurance, integrity to win market, innovation and development. Dedicated to power sector, large factories and mines, electrical testing workers to provide first-class products, first-class service.

FAQ

Q1.How long is your delivery time ?

It depends on you product.

Conventional products we have it in stock,it can be delivery within 3-5 working days

customized product can be delivery within 10-15 working days.

Q2. Do you accept OEM order ?

Yes, OEM & ODM are acceptable.

Q3. What's your payment terms?

We accept T/T(50% down payment and 50% paid before delivery), Paypal, Western union, Money Gram and via Alibaba Insurance(Credit card(Visa,Master),E-checking,TT)

Q4. What's the minimum order quantity? How long is the delivery time?

Both MOQ and delivery time need to refer to the specific products. Usually, we have stock for our brａnd products, please contact our sales for details.

Q5. Do you test all your goods before delivery?

A: Yes, we have 99% test before delivery

Q6. Why I choose you?

A. We are manufacturer of kinds of electric test equipment . You can buy what you need here at very reasonable price.

B. With 20years experience in this filed, we have the ability to provide good service and products in low cost.

C. Adequate inventory to make sure that our clients can obtain goods in a short period.