Deskripsi
Transformer Pressure Relief Valve / Pressure Relief Device
Product Introduction:
The YSF4II series pressure relief valves with φ80mm and φ130mm diameters are mainly used for liquid-filled main insulation transformers, instrument transformers, on-load tap changers, high-voltage switches, and other electrical products. When a fault occurs inside the electrical equipment, the valve will open to release the internal pressure; when the internal pressure drops to the closing pressure of the valve, the valve will reliably close, preventing external moisture and impurities from entering the equipment.
Conditions of Use:
Installation location: On the oil tank cover, on the riser, or on the side wall of the upper part of the oil tank;
Environmental requirements: -30℃～50℃; Operating environment requirements: -30℃～+115℃.
The sealing value is an important parameter for selecting a pressure relief valve for a transformer.
(Note: The sum of the highest normal pressure value that appears when the pressure relief valve is in operation plus 7 kPa should be less than the sealing value of the pressure relief valve).
Model Description:
*Note: D- indicates directional oil spraying, K- indicates electrical signal, SK (or KK)- indicates dual electrical signals, J- indicates mechanical signal, TH- indicates for humid and hot regions, TA- indicates for dry and hot regions, T- indicates for dry and humid hot regions, B- indicates with a locking device.
Example of marking: YSF4II-55/130KKJBTH refers to a type 4 pressure relief valve with a φ130mm oil spray diameter, an opening pressure of 55 kPa, with mechanical and dual electrical alarm signals, for use in humid and hot regions, and with a locking device.
Product Appearance and Dimensions:
Unit (units) mm
| Oil Spray Diameter | D | D1 | D2 | D3 | D4 | H1 | E | F | H | Valve Seat Mounting Bolts Diameter × Quantity |
| φ80 | φ122 | φ133 | φ149 | φ170 | φ200 | 56 | 150 | 14 | 185 | M12×6 |
| φ130 | φ176 | φ181 | φ199 | φ235 | φ260 | 60 | 180 | 18 | 196 | M16×6 |
Contact Capacity and Wiring Diagram:
| Power Type | Voltage (V) | Current A | |
| Resistive Load | Inductive Load | ||
| AC | 220V | 5 | 3（cos φ=0.4） |
| DC | 0.3 | 0.05（T=7ms） | |
Product Wiring Diagram:
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