Description
The mechanical overpressure protection device ensures that oil is discharged from transformers when overpressure occurs, and automatically restores the tank's tightness after a drop in pressure. Supplied with a stainless steel protective housing and/or a sealed signal contact block (up to 2 pcs.).
Application
Overpressure protection in transformers, load switches and other liquid-filled equipment.
Advantages:
- Compact protection for personnel and equipment
- 100% testing ensures reliable operation throughout the entire service life
- Corrosion-resistant materials and resilient design provide reliable protection
- Customizable for specific applications
| SPECIFICATIONS | ||
| Dimensions | Recommended tank opening | 75 mm [2.95 in] |
| Cover/Plate Diameter | 162.9 mm [6.41 in] | |
| Cover/plate height | 98.9 mm (3.89 in); 122.4 mm (4.82 in) with switch | |
| Electrical parameters | Cable and cable gland | Cable entry PG-13.5, max. 2.5mm 2 Stranded Wires (14 AWG) |
| Dielectric insulation | DC voltage 2500 V, 50/60 Hz, for 1 minute | |
| Contact ratings | 6 A at 120 V (AC); 3 A at 240 V (AC); 0.55 A at 125 V (DC); 0.27 A at 250 V (DC) | |
| Materials | Flange | Iron Phosphate Coated Aluminum and ASA 70 Light Gray Heat Shrink Powder Coating |
| Ring | Primed Conversion Coated Aluminum | |
| Valve | Light gray heat shrink powder coated aluminum ASA 70 | |
| Indicator | Brass | |
| Sleeve | Nickel plated bushing | |
| Spring | Oil Tempered Spring Wire, Anti-Corrosion Primed and Galvanized, ASTM A229 | |
| Spring seat | Aluminum | |
| Valve stem | Carbon steel, anti-corrosion primed and galvanized | |
| Seals | Nitrile (standard) or Viton (optional) | |
| External equipment | Stainless steel | |
| Plate/cover | Stainless steel | |
| Pins | Stainless steel or nickel plated bushing | |
| Working conditions | Operating ambient temperature | -40 to +80°C (-40 to +176°F) at 30°C oil temperature |
| Operating oil temperature | -20 to +100°C (-4 to +212°F) | |
| Signal contact block housing | Meets IP66 requirements | |
| Operating temperature of signal contact block | -25 to +85°C (-13 to +185°F) | |
