75 kVA ~ 2500 kVA UL-Listed Explosion-Proof Standard Pad-Mounted Transformer
Key attributes
| Brand | Vziman |
| Model NO. | 75 kVA ~ 2500 kVA UL-Listed Explosion-Proof Standard Pad-Mounted Transformer |
| Rated frequency | 50/60Hz |
| Rated capacity | 2500kVA |
| Primary voltage | 33kV |
| Secondary voltage | 0.4kV |
| Series | ZGS |
Product descriptions from the supplier
Description:
The UL-Listed Explosion-Proof Standard Pad-Mounted Transformer is an explosion-proof oil-immersed pad-mounted transformer certified by Underwriters Laboratories (UL), designed specifically for hazardous environments. Its core certifications and standards include:
UL Certification: Complies with UL 506 (Transformer Standard) and UL 1203 (Explosion-Proof Equipment Standard), ensuring safe operation in dangerous environments.
Explosion-Proof Rating: Typically marked as Class I, Division 1 (for flammable gas environments) or Class II, Division 1 (for combustible dust environments), adhering to the National Electrical Code (NEC 500/505).
Structural Standards: Based on IEEE C57.12.20 (American Pad-Mounted Transformer Standard) and NEMA 3R/4X (Enclosure Rating Standards).
Core Design Features:
Explosion-Proof Enclosure: Constructed with cast aluminum or stainless steel, joint surfaces and gaps strictly comply with UL 1203 (e.g., gap ≤0.15mm) to prevent flame propagation during internal arcing.
Pressure Relief System: Equipped with dual redundant pressure relief valves (operating pressure 55±5kPa) and spark arrestors to prevent tank rupture and secondary explosions.
Oil-Immersed Insulation: Utilizes high-flash-point insulating oil (e.g., silicone oil with flash point >300°C) or β-fluid (complying with UL 3406) to reduce fire risks.
Sealing Rating: Features fully welded construction with corrugated tanks, passing UL 50E explosion tests (methane-air mixture explosion test) to prevent ingress of combustible substances.
Electrical Connections: Equipped with explosion-proof cable glands (UL 1203 certified) and Ex d-type flameproof joints to ensure sparks at terminals do not ignite ambient gases.
Functions and Core Applications:
Safe Power Supply: Enables electrical energy conversion in flammable environments while preventing sparks or high temperatures from triggering explosions.
Fault Isolation: Contains internal faults (e.g., arcing, oil decomposition) within the enclosure through explosion-proof design.
Environmental Adaptation: With IP66 protection rating, resists ingress of corrosive gases and dust.
Parameter:
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