Oil immersed test transformer (hereinafter referred to as the test transformer), also known as booster, it is the power station, power supply and distribution system and scientific research units and other users of the basic test equipment. It is used to test the insulation strength of various electrical products, electrical equipment, insulation materials, etc. under the specified voltage, assess the insulation level of the product, find the insulation defects of the tested product, and measure the ability to withstand overvoltage.

Classification:

Key words:

test

power

insulation

Hotline:

400-068-3818

Download Product Brochure:

Message

Product Description
Technical parameters
Product selection
Manual Resources
Test wiring
ACCESSORIES LIST

- Commodity name: 10KVA and above, can be customized
Oil immersed test transformer (hereinafter referred to as the test transformer), also known as booster, it is the power station, power supply and distribution system and scientific research units and other users of the basic test equipment. It is used to test the insulation strength of various electrical products, electrical equipment, insulation materials, etc. under the specified voltage, assess the insulation level of the product, find the insulation defects of the tested product, and measure the ability to withstand overvoltage.

1. Overview:

Oil immersed test transformer (hereinafter referred to as the test transformer), also known as booster, it is the power station, power supply and distribution system and scientific research units and other users of the basic test equipment. It is used to test the insulation strength of various electrical products, electrical equipment, insulation materials, etc. under the specified voltage, assess the insulation level of the product, find the insulation defects of the tested product, and measure the ability to withstand overvoltage.

　　

2. structure

AC type test transformer, AC and DC dual-purpose light high-voltage test transformer is made of high-quality cold-rolled silicon steel sheet. The coil is a concentric pagoda-shaped multi-layer cylinder, with low-voltage coils inside and high-voltage coils outside; the shell is portable, with the advantages of small size, light weight, beautiful appearance, and convenient movement.

　　

3. working principle

The power frequency 220V (380V above 10KVA) power supply is connected to the control box (set) (for supporting equipment of the test transformer, please refer to the instruction manual of the control box (set) for details), and the voltage of 0-220V/380V adjusted by the self-coupling voltage regulator is input to the primary winding of the test transformer. According to the principle of electromagnetic induction, the voltage amplitude of the same multiple-power frequency high voltage-is obtained in the secondary (high voltage) winding according to its ratio to the number of turns of the primary winding. This power frequency high voltage can be obtained by high-voltage silicon stack rectification and capacitor filtering, and the amplitude is twice the effective value of the power frequency high voltage.

This series of products are divided into three categories: AC type, AC and DC dual-purpose type, at the same time can be connected with a 200V tap into a series test transformer.

ACCESSORIES LIST

1. Technical parameters of AC test transformer

Capacity (KVA)	High voltage output voltage (KV)	High Voltage Output Current (mA)	Low voltage input		transformation ratio	Temperature rise ℃ 30 minutes
Capacity (KVA)	High voltage output voltage (KV)	High Voltage Output Current (mA)	V	A	transformation ratio	Temperature rise ℃ 30 minutes
1.5	50	30	200	7.5	500	10
3	50	60	200	15	500	10
5	50	100	200	25	500	10
10	50	200	220/380	50/26	500	10
20	50	400	380	53	500	10
30	50	600	380	79	500	10
40	50	800	380	105	500	10
50	50	1000	380	132	500	10
5	100	50	200	25	1000	10
10	100	100	200/380	50/26	1000	10
20	100	200	380	53	1000	10
30	100	300	380	79	1000	10
40	10	400	380	105	1000	10
50	100	500	380	132	1000	10
100	100	100	500	263	1000	10
150	100	1500	500	300	1000	10
200	100	2000	500	400	1000	10
250	100	2500	380	500	1000	10
20	150	133	380	53	1500	10
30	150	200	380	79	1500	10
50	150	333	380	132	1500	10
100	150	666	500	263	1500	10
150	150	1000	500	300	1500	10
200	150	1333	500	400	1500	10
250	150	1666	380	500	1500	10
30	200	150	380	79	2000	10
50	200	250	380	132	2000	10
100	200	500	380	263	2000	10
150	200	750	500	300	2000	10
200	200	1000	500	400	2000	10
250	200	1250	500	500	2500	10
30	250	120	380	79	2500	10
50	250	200	380	132	2500	10
100	250	400	380	263	2500	10
150	250	600	500	300	2500	10
200	250	800	500	400	2500	10
250	250	1000	500	500	2500	10

Note: The input voltage of 100KVA and above can be increased to 3000V or proposed by the user.

2. Technical parameters of AC/DC test transformer:

Capacity (KVA)	High voltage output (KV)		High Voltage Current (mA)		Low voltage input		transformation ratio	Temperature rise ℃ 30 minutes
Capacity (KVA)	AC	DC	AC	DC	Voltage V	Current A	transformation ratio	Temperature rise ℃ 30 minutes
1.5	50	70	30	15	200	7.5	500	10
3	50	70	60	15	200	15	500	10
5	50	70	100	15	200/380	25	500	10
10	50	70	200	100	380	50/26	500	10
20	50	70	400	100	380	53	500	10
30	50	70	600	100	380	79	500	10
40	50	70	800	100	380	105	500	10
50	50	70	1000	100	380	132	500	10
5	100	140	100	50	200/380	25	1000	10
10	100	140	200	100	380	50/26	1000	10
20	100	140	300	100	380	53	1000	10
30	100	140	400	100	380	79	1000	10
40	100	140	600	100	380	105	1000	10
50	100	140	1000	100	380	132	1000	10

2
Attachment Download:ZYDJ-10kVA-100kV test transformer user manual. doc.
Test wiring

1. AC (power frequency) withstand voltage test wiring diagram

Note: When doing AC withstand voltage test, either AC test transformer or AC/DC test transformer can be used. However, when using AC and DC to do AC withstand voltage test, it is not necessary to pull out the short-circuit rod on the high-voltage column.

2. DC leakage and DC withstand voltage test wiring diagram

Description:

2.1 When doing DC leakage and DC withstand voltage test, only AC and DC test transformer can be used, and the short-circuit rod on the high-voltage column must be pulled out during use.

2.2 do cable withstand voltage does not need another and capacitor, available voltage divider, voltage divider more intuitive, accurate readout of high voltage voltage value.

When 2.3 do DC leakage, the micro-ammeter can directly read out the DC leakage value.

After 2.4 the DC leakage, the DC withstand voltage test can be carried out directly without removing the wire.

2.5 The capacitor shall be added during the lightning arrester test.

3. Wiring of series excitation combination test transformer

3.1 AC series high voltage test transformer, several test transformers can be formed by appropriate combination of extremely high voltage test transformers. The principle is to wind the excitation winding in the high-voltage winding of the test transformer, and the winding has the same parameters as the primary coil of the next test transformer.

Schematic diagram of 3.2 two test transformer series excitation wiring

3. Schematic Diagram of Series Connection of Three Test Transformers

Description:

The control box (set) supplies the power supply for the primary winding of the first-stage test transformer. The tail end of the first-stage high-voltage winding is grounded to the shell, and the head end is connected to the high-voltage tail end of the second-stage test transformer and the shell. The excitation power supply of the second stage low voltage winding is supplied by the first stage series tap. Similarly, the third stage can be superimposed, then the output voltage of the third stage test transformer is the sum of the three test transformer voltages, I .e. u total = u1 + u2 + u3, and the capacity of the three test transformer meets the relation s total = s3 × 3.

3.4 can form a DC series excitation test transformer, only the silicon stack with 2u is added to the test transformer with the highest voltage after AC series excitation.

Note:

1. The test transformer shall be used together with the control box (Taiwan). For how to use the control box (Taiwan), please refer to the Operation Manual of the Control Box (Taiwan).

2. DC test application of shielded wire, in order to eliminate stray leakage. After the test, the stored charge shall be discharged with a discharge rod.

3. The grounding wire at the end of the high-voltage filter capacitor and the protective grounding wire (control box shell) should be reliably grounded.

4. The high-voltage test site should comply with the high-voltage test operating procedures, pay attention to equipment and personal safety.
ACCESSORIES LIST

1.1 high voltage output line (to be indicated when ordering, generally not equipped);

2.1 instruction manual;

3. One test report;

4. Product certificate/warranty card 1 copy.

Quality first, service first

Tree industry standards, do a hundred years of enterprises.

Cooperation cases

Wuhan Zhongke Xinyi Electric Power Technology Co., Ltd.

Brand: ZECERS/Zhongke Xinyi

Wuhan Zhongke Xinyi Electric Power Technology Co., Ltd. (brand: ZECERS/Zhongke Xinyi) is a high-tech enterprise focusing on the design, development, manufacturing and technical services of high-voltage test equipment and secondary test equipment for power systems.

The company is located in the Optics Valley New District of the High-tech Development Zone, with 5600 square meters of modern standard production plants and perfect manufacturing, processing and testing equipment. The company has a strong research and development, solid technology, excellent quality team, and Wuhan universities have close ties and technical cooperation, laying a solid foundation for technological innovation. The company has successively obtained ISO9001:2015 international quality management system certification and high-tech enterprise certification. Based on domestic power system testing, the company explores high-tech cutting-edge information technology, and is committed to the research of various new power technologies and the formulation and promotion of relevant standardization.

The company adheres to the business philosophy of "quality-oriented, pioneering and innovative, honest and pragmatic, and win-win cooperation", regards product quality and independent innovation as the core competitiveness of the enterprise, and continuously strives for the standardization, humanization, intelligence, refinement and diversification of products. The products cover all aspects of power testing, and widely serve the State Grid, South Grid, Inner Mongolia Power Grid and other power systems, major power generation groups, photovoltaic wind power new energy enterprises, railway petrochemical enterprises, metallurgical industrial and mining enterprises, electrical complete sets of enterprises, transmission, transformation and distribution engineering construction units, scientific research institutions, third-party testing institutions and other enterprises and institutions. The power testing equipment produced by the company provides a reliable data basis for the safe operation of the power system. The company's products have covered all provinces and cities in the country, and have been exported to Laos, Myanmar, Cambodia, Vietnam, Pakistan, East Africa, Russia, Malaysia, Brazil, Europe and other countries, and have been widely recognized.

"Technology to create the future, innovation to change the present", would like our professional to provide you with satisfactory products and services and create more value.

2014 Year

Company establishment

3060 Wan yuan

Registered capital

5600 ㎡

Production plant

8372 +

Customer Service