YTYJ1 type Pressure and Sudden Pressure Relay
The pressure and sudden pressure relay is a newly developed pressure relay by Shenyang Kochi Electric Appliance Co., Ltd. for protecting the safety of oil tanks in transformers, power capacitors, reactors, and other equipment. It consists of two parts: a sudden pressure relay (also known as a pressure gradient relay) and a static oil pressure relay, which respectively measure the speed of oil tank pressure change and the static oil pressure of the oil tank as signal sources.
When the pressure inside the fuel tank rises at a rate greater than 3 ± 1kPa/sec, the emergency pressure relay can act first and send an electrical signal, so that the fuel tank can be in a low-pressure zone and give an alarm in case of a sudden malignant accident. The response time of the sudden pressure relay decreases with the increase of pressure rise speed, and its action characteristic curve is shown in Figure 1. When a sudden pressure relay is activated, the net increase in pressure, which is the product of the rate of pressure rise and the response time, generally does not exceed 25kPa ± 20%. For example, when the pressure rises at a gradient of 500kPa/sec, the action response time is about 0.05 seconds, while when the pressure rises at a gradient of 100kPa/sec, the action response time is about 0.25 seconds.
YTYJI-80-55-25 indicates that the oil passage diameter of the relay connected to the transformer or reactor is 80mm, the static pressure alarm value is 55kPa, and the sensitivity is 25 kPa.
working environment
1. Scope of use: Suitable for oil immersed transformers or oil immersed reactors.
2. Technical requirements
a) Environmental requirements: -30 ℃ -+50 ℃
b) Relative humidity: not exceeding 95% at+20 ℃; c) The wiring terminals and conductive parts of the micro switch should be able to withstand a power frequency voltage of 2000V for 1 minute without insulation heating, breakdown, or flashover phenomena; d) When the vibration frequency is 4-20Hz (sine wave) and the acceleration is 2g~4g, the relay contacts do not move.
