Product Description
Buchholz relay type QJ is a kind of protective device used for oil immersed transformer with conservator and on-load tap changer. If a fault generated inside the transformer(or the on-load tap changer), cause gases generated from oil decomposed. When the amount of gas accumulate up to a stated level, the signal contact of buchholz relay turns on and send alarm signal. When a serious fault generates inside transformer or on-load tap changer,the transformer oil surge will happen, oil flow heavily in the pipeline and result in the operation of baffle plate of buchholz relay leads to the trip contact turning on, so trips the transformer. If the oil level is low due to the oil losses, the alarms is also initiated.
| assembling method |
the relay's pipe axis should be parallel to the transformer case cover,and it is allowed for the end leading to the conservator is highter,however the inclination between the axis and level surface may not exceed 4% |
| structure of the gas relay |
the relay's core structure is shown in fig.1 and the relay's upper core consist of gas lock1,gas lock nut 2,probe 3,blocking 4,snap ring(float) 5,weight drop6,guard board 7,magnet 8, connecting terminal 9,spring 10,regulating rod11 and dry reed contact12.formin a flow device that acts on tripping,
gas lock 1 in the cover is used for exhaustion in the case of assembly and extracting gas out of order. probe 3 is used to check flexibility and reliability of the tripping mechanism. |
Application
The Gas relay series QJ is protective device for oil immered transformer. If a fault causes gas to be generated in the transformer or a heavy surge of insulating oil the Gas relay shall be in operation, thealarm signal is initeated and/or the transformer is tripped automatically.
Principle of design
When the transformer is operating normally, the Gas relay is completely filled with insulating oil .If a fault causes gas to be generated in the transformer,the bubble will filter along towards the conservator and accumulated at the highest point in the Gas relay. As the amount of gas coquette increases and the oil level in relay fall as a result, the cup also falls and eventually reaches point where it actuates the magnetic switch with the permanent magnet and so initiated the alarm signal. If the oil loses, the alarm signal is also initiated A violent generation of gas accompanied by a heavy surge of insulating oil results in operation of baffle plate. the magnetic is actuated by the permantmagnet on the baffle plate so it trips the transformer.
Product Parameters
(1) Working temperature: -30°C~95°C
(2) Switch Capacity: AC 220V 0.3A COSφ≤0.6
DC 220V 0.3A S≤5×10-3S
(3) Operation Character:Table
| Type |
QJ-80 |
QJ-50 |
QJ-25 |
| Range of flow(m/s) |
0.7~1.5 |
0.6~1.2 |
1.0 |
| Gas accumulation (ml) |
250~300 |
<250 |
(4) Sealing character: filling transformer oil into the relay, Pressurizing normal temperature 200kPa,Continued 20 min and without any leakage.
(5) Insulation Character:Table
| Test item |
Voltage between contacts |
Voltage between terminal and earth |
Voltage between signal and trippingterminal |
| Bring to bear on industry voltaye |
2000v /1 min |
2000v /1 min |
2000v /1 min |
(6) Antivibration capacity
When acceleration is 4g at vibration frequency of 4~20Hz,the relay shall not do any.
Installation and application
The overall size of QJ4-25 Relay is shown as Fig. A. The overall size of QJ1-50 ,80,QJ4-50,80 Relay is shown as Fig. B. Seeing Table 3 for the size.
The Gas relay is fitted in pipeline between the tank and conservator. pay special attention to the arrow on the housing the conservator.
For filling oil, please all valves in the pipeline between the tank and conservator, blled the housing via the bleeder and then ciosed.
Air pumped form the air plug, the reliability of "Signal" contacting motion can bechecked.
Cover twisted down, pinprossed, the reliability of "Trip" contacting motion can bechecked.
Note
Before the newly-produced relay installed and used, the relay chip must be taken out and the locked banding used during the transportation should be demolished.
The Gas relay must be checked by special device, then can mounted.
The spring on the baffle plate can changed the length, adjusting the value for tripping. The other parts of the Gas relay can`t change at will.
Replacing or adding some parts near the permanent magnet and magnetic switch, the non-magnetic material must be used.
The permanent magnet can be not intensely vibratied or in strong magnetic field, The permissible operating temperature is from -40°C to 100°C.
The magnetic switch can`t dismantle and the end of leads can`t bend at will.
Structure outline and dimensions:Table
| No. |
Type |
Connection pipe(mm) |
Gas Volume
(ml) |
Set oil flow speed range (m/s) |
Magnet contact tube |
Connection
diagram |
| 1 |
QJ4-25 |
25 |
250 |
1.0 |
Single signal; Single trip |
4 |
| 2 |
QJ4G-25 |
|
Single trip |
5 |
| 3 |
QJ6-25 |
Double trips |
6 |
| 4 |
QJ1-50 |
50 |
250~300 |
0.6~1.2 |
Single signal;
Double trips |
7 |
| 5 |
QJ1-80 |
80 |
0.7~1.5 |
| 6 |
QJ2-50 |
50 |
0.6~1.2 |
| 7 |
QJ2-80 |
80 |
0.7~1.5 |
| 8 |
QJ3-50 |
50 |
0.6~1.2 |
Single signal ;Double trips |
8 |
| 9 |
QJ3-80 |
80 |
0.7~1.5 |
| 10 |
QJ4-50 |
50 |
0.6~1.2 |
Single signal ;Double trips |
7 |
| 11 |
QJ4-80 |
80 |
0.7~1.5 |
| 12 |
QJ5-50 |
50 |
0.6~1.2 |
Single signal ;Double trips |
8 |
| 13 |
QJ5-80 |
80 |
0.7~1.5 |
| 14 |
QJ6-50 |
50 |
0.6~1.2 |
| 15 |
QJ6-80 |
80 |
0.7~1.5 |
| 16 |
QJ7-50 |
50 |
0.6~1.2 |
Single signal ;Double trips |
7 |
| 17 |
QJ7-80 |
80 |
0.7~1.5 |
| 18 |
QJ8-50 |
50 |
0.6~1.2 |
Double signal;
Double trips |
9 |
| 19 |
QJ8-80 |
80 |
0.7~1.5 |
| 20 |
QJ9-50 |
50 |
0.6~1.2 |
| 21 |
QJ9-80 |
80 |
0.7~1.5 |
| 22 |
QJ10-50 |
50 |
0.6~1.2 |
Single signal ;Double trips |
7 |
| 23 |
QJ10-80 |
80 |
0.7~1.5 |
| 24 |
QJ11-50 |
50 |
0.6~1.2 |
Single signal ;Double trips |
8 |
| 25 |
QJ11-80 |
80 |
0.7~1.5 |
| 26 |
QJ12-50 |
50 |
0.6~1.2 |
| 27 |
QJ12-80 |
80 |
0.7~1.5 |
| 28 |
QJ13-50 |
50 |
0.6~1.2 |
| 29 |
QJ13-80 |
80 |
0.7~1.5 |
| 30 |
QJ14-50 |
50 |
0.6~1.2 |
Double signal;
Double trips |
9 |
| 31 |
QJ14-80 |
80 |
0.7~1.5 |
| 32 |
QJ15-50 |
50 |
0.6~1.2 |
Single signal ;Double trips |
8 |
| 33 |
QJ15-80 |
80 |
0.7~1.5 |
| 34 |
QJ16-50 |
50 |
0.6~1.2 |
Double signal;
Double trips |
9 |
| 35 |
QJ16-80 |
80 |
0.7~1.5 |
| 36 |
QJ17-50 |
50 |
0.6~1.2 |
Double signals ;Single trip |
10 |
| 37 |
QJ17-80 |
80 |
0.7~1.5 |
| 38 |
QJ18-50 |
50 |
0.6~1.2 |
| 39 |
QJ18-80 |
80 |
0.7~1.5 |
| 40 |
QJ19-50 |
50 |
250~300 |
0.6~1.2 |
Double signals ;Double trips |
11 |
| 41 |
QJ19-80 |
80 |
0.7~1.5 |
Company Profile
Company Introduction
NingboVille Enterprise Co.,Ltd.is a combination of Transformer R&D center, production, sales and after sales service,possesses of strong technical strength and excellent manufacturing equipments, as well as modern Office facilities. It specially produces large scale power transformer and industrial transformers of high quality and reliability. A large share of its resources are devoted to research and development of industrial and special transformers and reactors for any special application,such as
the iron and steel and electrometallurgical industries.The company main working is suppling,engineering,designing,manufacturing, executing, and commissioning for transformer .
Why Choose Us
FIRST-CLASS PROCESSING AND TEST EQUIPMENT
We have more than 500 sets of sophisticated, advance production and test equipments, complete and perfect processing equipments, and scientific and rational processing technology, which guarantee first-class products, Authorized by the Bureau of Zhejiang Technology Supervision, Quzhou Fangyuan Inspection Company of Power Transmission and Transformation Equipment, whick is based on our testing center, undertakes the quality inspection of the industry in our province, this is a solid guarantee for our excellent product quality.
BEAUTIFUL ENVIRONMENT
We are confident that good products come from good personnel, and good environment makes qualified personnel. The company is committed to creating a garden-like working environment for employees. We have green belts, modern standardized workshops and well-planned parks where we sow our youth; we work hard, so we are harvesting the future.
With the first-class quality products, reasonable price and excellent after-sale services.product not only best-selling all over the country,but also in the international market have higher credit, such as Thailand, Vietnam, Myanmar, Indonesia,alaysia,Philippines, Ethiopia and Nigeria, Saxonstan,Uzbekistan, Korea, Turkey, Sudan, Iran etc. especially in the steel enterprises, VILLE production of transformers already have high reputation.
Our Performance:
| 1. |
Pre sale service |
| a. |
make technical solution |
| b. |
send quotation, technical data sheet and drawing |
| c. |
prepare power transmission plan, testing plan,and shipment plan |
| 2. |
In sale service |
| a. |
supervise the manufacturing schedule totally in accordance with the plan |
| b. |
send photos to customer during every manufacturing process(hold point) |
| c. |
inform the customer one week before testinng. |
| 3. |
After sale service |
| a. |
installation and commissioning, training the workers |
| b. |
quick response within 12 hours any time |
| c. |
provide 12 months gurantee period normally. |
FAQ For You
| 1. Q: |
What is your delivery time ? |
| A: |
Depend on the type of transformer. |
| 2. Q: |
What is your payment term? |
| A: |
30% advance by T/T , 70% before delivery by T/T or L/C or we can discuss about it. |
| 3. Q: |
What kind of starndard you follow? |
| A: |
IEC, ANSI, CSA, GB, etc |
| 4. Q: |
What kind of supporting documentation you can provide normally |
| A: |
Quotation,outline drawing,manufacturing plan, quality control plan,testing plan, financial report, type test report(KEMA, CESI),reference list,etc |
| 5. Q: |
What is your normal wanrranty period? |
| A: |
12 months after transformer operation. |
| 6. Q: |
Can u do installation and commissioningin user's site? |
| A: |
Yes, we can send our installation team to user's country for service. |
| 7. Q: |
Do you have any experience in this kind of transformer? |
| A: |
Yes, we can provide reference list for check. |
| 8. Q: |
Are you manufacturer or trading company? |
| A: |
Manufacturer and Trading company. |
Our advantages:
Quality Assurance
--From the very beginning, VILLE ensures quality in every step to achieve the best quality.
Experience Sharing
--With more than 30 years' experience in power industry, VILLE brings you an optimized solution.
Global Service
--Wherever you are, VILLE global network will support and provide you with value.
Quick Response
--In response to your needs without delay, VILLE knows the value of your time.
Thanks for choosing VILLE as your reliable partner and please trust both of us will create a brilliant future!
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