When the transformer pressure relief valve YSF16-70*130KKJ is triggered by internal overpressure, correct reset operation is the key to ensure the continued safe operation of the equipment. This article will combine industry standards and field experience to explain the complete process and precautions of the reset operation.

I. Immediate response after action: safety confirmation and preliminary inspection

1. Cut off the power supply and hang a warning sign

Immediately disconnect the transformer power supply and hang an “equipment maintenance” warning sign in the operation area. At this time, please note:

- If the pressure relief valve has obvious oil spray marks, it is necessary to keep it still for at least 30 minutes to wait for the oil mist to settle

- Check whether there are unextinguished fire sources around, and use a carbon dioxide fire extinguisher to warn if necessary

2. Triple confirmation of the action status

- Mechanical signal pole: observe whether the yellow flagpole pops up. If it is not fully reset, the offset angle needs to be recorded

- Oil spray marks: measure the splash radius. If it exceeds 1.5 meters, the insulating oil pollution range needs to be evaluated

- Micro switch status: use a multimeter to check whether the normally open contact is closed

II. Core reset operation: mechanical and electrical synchronous processing

(I) Mechanical reset operation specifications

1. Reset rod operation skills

- Wear oil-proof gloves and push the reset rod inward steadily

- After hearing the “click” sound, keep the thrust for 3 seconds to ensure that the spring is fully returned

- Check the valve disc sealing surface: wipe it with a white cloth and observe whether there is any residual oil stains

2. Special working condition processing

- Low temperature environment (<-10℃): The valve body must be heated to above 5℃ before resetting

- Repeated action record: If the action exceeds 2 times within half a year, the maintenance cycle must be shortened to 3 months

(II) Key points for electrical signal reset

1. Junction box inspection process

- Mark the cable position before removing the junction box

- Test the relay contact resistance: the normal value should be ≤0.1Ω

- Adjust the iron sheet spacing: maintain a gap of 0.5-1mm to ensure flexible action

2. Signal verification method

- Short-circuit the test terminal to simulate the action and observe whether the DCS system alarm is released

- Use an insulation resistance meter to measure the insulation of the secondary circuit: ≥10MΩ is required

III. Key tests after reset: Eight must-check items

1. Sealing performance test

- Apply 1.2 times the set pressure (about 84kPa), maintain pressure for 30 minutes, and the leakage volume is ≤5mL

- Use a helium mass spectrometer leak detector for detection, and the sensitivity must reach 1×10−6Pa\cdotpm3/s

2. Mechanical property verification

- Action pressure deviation: Repeat the test three times, fluctuation range ≤±5%

- Reset pressure value: should be 10-15kPa lower than the action pressure

3. System linkage test

- Simulate overpressure triggering to verify that the protection system response time is ≤200ms

- Check oil chromatography analysis data: acetylene content should be <0.1μL/L

By strictly implementing the above reset operation process, the reliability of the YSF16-70*130KKJ pressure relief valve can be improved to 99.9%. Remember: every standardized operation is a solemn commitment to the safe operation of the power system!

When looking for high-quality, reliable pressure relief valves, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:

E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229

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