Transformer Oil HTO

available

High Temperature Transformer Oil (HTO)

“The silent guardian of the grid: high-performance dielectric oil for the world’s most critical transformers.” Arnico’s HTO Transformer Oil is a highly refined, inhibited mineral insulating oil engineered for the most demanding thermal and electrical stresses. It provides superior cooling, exceptional dielectric strength, and long-term oxidation stability, ensuring the safe, uninterrupted, and efficient operation of power and distribution transformers. When the reliability of the electrical grid is non-negotiable, our HTO is the unseen protector within.

Description More

1. Product Introduction & Main Application

Arnico’s High Temperature Transformer Oil (HTO) is a highly refined mineral dielectric oil with exceptional oxidation stability, specifically designed for the cooling and electrical insulation of power transformers, reactors, and other high-voltage equipment. With its ultra-low viscosity and resistance to sludge formation, this oil guarantees the safe and long-term performance of equipment under high temperatures and heavy loading conditions.

2. Technical Specifications

Technical Parameter	Standard Grade (Class I)	Inhibited / Premium Grade	Unit
Viscosity at 40°C	≤ 12	≤ 10	cSt
Viscosity at -30°C	≤ 1800	≤ 1400	cSt
Pour Point	≤ -40	≤ -45	°C
Flash Point	≥ 140	≥ 150	°C
Total Acid Number (TAN)	≤ 0.03	≤ 0.01	mg KOH/g
Dielectric Breakdown Voltage	≥ 40	≥ 60	kV
Dielectric Dissipation Factor (DDF) at 90°C	≤ 0.005	≤ 0.002	–
Water Content (at delivery)	≤ 30	≤ 20	ppm

3. Features & Benefits

Unmatched Oxidation Stability: The Inhibited Grade, with antioxidant additives, drastically extends the oil’s service life and prevents the formation of acid and sludge at high operating temperatures.
Excellent Dielectric Properties: High breakdown voltage and low dissipation factor ensure the electrical safety of the transformer, even under fault conditions.
Superior Heat Transfer: The low viscosity and very low pour point enable effective oil circulation and cooling of the core and windings, even in harsh winter conditions.
System Compatibility: Non-corrosive to copper components and fully compatible with transformer seals and gaskets.

4. Industrial Applications

Power Transformers: The primary insulating and cooling fluid in large transmission and sub-transmission transformers.
Distribution Transformers: Used in pole-mounted and ground-level urban distribution transformers.
Reactors & High-Voltage Equipment: Cooling and insulating current-limiting reactors.
High-Voltage Oil-Filled Cables: The dielectric fluid in OF and HPFF power cables.

5. Safety & Handling

MSDS (Material Safety Data Sheet): This material is a mild skin irritant. Hot oil causes burns. The Arnico MSDS file must be obtained.
Storage Conditions: Store in clean, sealed containers, away from moisture, dust, and direct sunlight. Contamination with water and solid particles must be strictly prevented.
Personal Protective Equipment (PPE): When sampling and decanting, the use of oil-resistant gloves and safety goggles is recommended.

6. Quality Assurance & COA

All Arnico HTO shipments are supplied with a complete Certificate of Analysis (COA) including breakdown voltage, DDF, and pour point tests, in accordance with IEC 60296.

Technical documents for the product Transformer Oil HTO including the Technical Data Sheet (TDS), Material Safety Data Sheet (MSDS), and Certificate of Analysis (COA), are available to customers upon request.

To receive these documents and further information, please contact our technical or sales department, or reach out to us via email.