Product Introduction
To obtain a test transformer with a higher voltage, a cascade method can also be adopted to achieve a higher voltage.
Figure 2 shows the principle wiring diagram of the three-stage series test transformer. The relationship between the capacity and voltage of three of the transformers is satisfied: P1=2P2=3P3,U(total)=U1+U2+U3S,

The test system mainly includes the above 4 parts: oil-immersed test transformer YDJ-20KVA/120KV,YDJ-10KVA/120KV, matching TCJH-20KVA control unit,240KV insulating support, please check below parameters
Product Parameter
1. Oil immersed test transformer(first cascade)
Model:YDJ-20KVA/120KV 1set
parameters:
capacity:20KVA
Input voltage:2 phase AC:200V 50Hz
Input current:100A
Output voltage:AC:120KV output current::160mA cascade voltage 200V
Meter voltage:100V
No-load current accounts for the rating:≤6%
impedance:8.4%
Working form: intermittent short-time working, oil cooling.
Shape: Iron shell octagonal structure with movable casters at the bottom.
Surface coating: internationally popular light gray
2. Oil-immersed test transformer:(second cascade)
model:YDJ-10KVA/120KV 1set
parameters:
capacity:10KVA
Input voltage:2 phase AC:200V 50Hz
Input current::50A
Output voltage:AC 120KV output current:100mA Meter voltage:100V
No-load current accounts for the rating:≤6%
impedance:8.4%
Working form: intermittent short-time working, oil cooling.
Shape: Iron shell octagonal structure with movable casters at the bottom.
3. voltage control unit:
Model:TCJH-20KVA 1 SET
capacity:20KVA control unit
Main parameter:
Input voltage: AC:380V 50Hz
Input current:50A
Output: AC0~450V 50A
Work form: intermittent short-time work
Main functions: high voltage indicator, low voltage current indicator, voltage timing setting and timing alarm, low voltage overcurrent protection and setting, zero start protection, start, stop, timing,
Product Feature And Application
1. The high-voltage tail, grounding column, one end of the instrument terminal, and one end of the input terminal of the 10KVA test transformer must be connected with wires, but must not be connected to the ground.
2. If there is no cascade high-voltage output, the A and B lines connected to the 20KVA test transformer and the 10KVA test transformer can be cross-switched. The polarity of the like-name terminals of a general transformer is usually marked with terminals of the same color.
Accessory
|
No |
Product name |
Model |
unit |
Qty |
remark |
|
1 |
Control unit |
TCJH-20kVA/0.22kV |
set |
1 |
|
|
2 |
Cascade test transformer |
YDJ-20kVA/120kV/0.2kV |
set |
1 |
|
|
3 |
Test transformer |
YDJ-10kVA/120kV/0.2kV |
set |
1 |
|
|
4 |
120KVinsulation support |
60KV |
set |
1 |
|
|
3 |
Connecting cables |
Based on needs |
set |
1 |
|
|
6 |
Accessories and shield ring |
Test onsite


About Us
Wuhan Huayi Electric Power Technology Co., Ltd
HUAYI is a professional manufacturer in China that researches and manufactures electric testing equipment. Established in 2005, the company is one of the earliest manufacturers of high-voltage testers in China. HUAYI insists on developing and marketing its products independently and makes efforts to improve product quality, reduce costs, and enhance efficiency.
HUAYI is committed to preventative, maintenance, troubleshooting, and commissioning. With ISO-certified professional engineering support and Satisfactory customer service, our brand has been recognized and supported by a wide range of users.
large enterprise scale
Efficient and precise processing and testing equipment. We have our factory, engineers, and service team.
Standardized Production
Passed ISO9001 certification and obtained relevant patent certificates.
High-Quality Customized Services
No intermediate links, providing one-stop service from design, processing, mold trial to mass production.

Our certification

Our engineering team

Customers visiting

Our workshop

Our Service
Create a comprehensive solution for customers
01
Pre-sale service
Conduct product consultation, product promotion, and marketing activities, and provide technical support for customer needs.
02
Delivery service
Packing with wooden cases, provide different solutions of shipping way, accept different payment way. Save shipping cost and make sure the products arrive well.
03
After-sales service
Installation and commissioning of specific products; Respond to consumer questions, answer consumer inquiries, and deal with consumer comments.

FAQ
1. Delivery: Fast delivery and Flexible mode of transportation
2. Payment: Choose payment terms and a convenient payment method
3. Sales service: 24-hour online contact, choose the right model of equipment according to your request, give the best offer, support customization
4. Warranty period: All machine quality guarantees for one year, and lifetime technical support for you. Online response to customers' technical problems.
Please get in touch with us if you have any questions about products, prices, technology solutions, or services. We will always be with you.
Our address
Gaoxin 4th Road, No.40, Wuhan City, China
Phone Number
(86)-18062012971/+8618064115448 WhatsApp
sales@sinohipot.com/ tina@sinohipot.com


One-stop high voltage test equipment Factory in China
Send your inquiry about test equipment to us and experience the professional solutions it can have on your business or brand. With our technology solutions and products, you can elevate your products, captivate your customers, and unlock new opportunities for growth and success in the electric industy.
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