QJ8-50 type gas relay
Application
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.
Feature
| 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. |
Workshop & Facility
Our Services
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Pre sale service |
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a. |
make technical solution |
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b. |
send quotation, technical data sheet and drawing |
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c. |
prepare power transmission plan, testing plan and shipment plan |
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2. |
In sale service |
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a. |
supervise the manufacturing schedule totally in accordance with the plan |
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b. |
send photos to customer during every manufacturing process(hold point) |
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c. |
inform the customer one week before testing. |
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3. |
After sale service |
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a. |
installation and commissioning, training the workers |
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b. |
quick response within 12 hours any time |
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c. |
provide 12 months guarantee period normally. |
FAQ
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What is your delivery time ? |
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A: |
Depend on the type of transformer. |
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2. Q: |
What is your payment term? |
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A: |
30% advance by T/T , 70% before delivery by T/T or L/C or we can discuss about it. |
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3. Q: |
What kind of standard you follow? |
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A: |
IEC, ANSI, CSA, GB, etc |
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4. Q: |
What kind of supporting documentation you can provide normally |
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A: |
Quotation, outline drawing, manufacturing plan, quality control plan |
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5. Q: |
What is your normal warranty period? |
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A: |
12 months after transformer operation. |
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6. Q: |
Can u do installation and commission in user's site? |
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A: |
Yes, we can send our installation team to user's country for service. |
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7. Q: |
Do you have any experience in this kind of transformer? |
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A: |
Yes, we can provide reference list for check. |
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