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Trihal - Cast Resin
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Trihal – Cast Resin

Dry-Type Transformer – Schneider Electric
Trihal – Cast Resin Distribution Transformer

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Trihal is a best-in-class range of dry-type cast resin transformers renowned for its safety, efficiency and reliability.
With a worldwide installed base of over 150 000 units in more than 100 countries, Trihal is an optimized transformer for contractors,
panel-builders and distributors from the mid and large sized buildings and industry to the renewables and electro-sensitive/intensive applications.
With more than 30 years of manufacturing experience, Trihal is engineered to minimize customer’s total cost of ownership and best return on investment for a dry transformer.
Key Features & Benefits
Best-in-Class Safety & Efficiency: Renowned for its superior safety, high efficiency, and consistent reliability in demanding environments.
Proven Global Reliability: Features a massive worldwide installed base of over 150,000 units across more than 100 countries.
Optimized ROI: Specifically engineered to minimize the Total Cost of Ownership (TCO), ensuring the best return on investment for dry-type transformers.
30+ Years of Engineering Expertise: A versatile solution optimized for contractors and panel-builders across various sectors, including large buildings, heavy industry, and renewabes.
Standard design Possible adaptation
Manufacturing standards IEC 60076-11, EN 50588, EN 50629 GOST-R, BS, IEEE
Efficiency (losses level) Eco-Design Every reduced losses required by customers
Class tests E4 , C4 , F1
HV/LV coils HV encapsulated in cast resin/LV impregnated HV and LV encapsulated in cast resin
Installations Indoor use: Outdoor use with properly designed enclosure:
* IPOO (without enclosure)/IP21,IP31 (with enclosure) * From IP35 up to IP44 (with enclosure)
ㆍUp to C5-Marine, Medium durability
(in compliance with ISO 12944-6)
Winding material According to manufacturer optimization (Cu or Al) Cu/Cu
Phases Three-phase Single-phase
Cooling system Standard: AFWF (air forced water forced)
ㆍ AN (natural air)
Option:
ㆍ AF (air forced)
ㆍ 40% performance reserves
Maximum T*C/altitude 40C at any time/1000 m Up to 65*C/Above 1000 m
Thermal class insulation According to IEC 60085, Class F
Temperature rise 100 K 80 K (for 40C)
Temperature rise adapted to maximum T”C
Temperature Rise < 100K upon request
Rated frequency 50 Hz or 60 Hz
Rated power Up to 3150 kVA Up to 15 MVA
Impedance voltage Uk From 4 to 6% ㆍ Lower than 4%
ㆍHigher than 6% – Up to 11%
Vector groups Dyn, YNd All others according to IEC
Rated HV insulation Up to 36 kV (IEC) Up to 40.5 kV (GOST-R)
HV tapping Off-circuit tapping links: 3 or 5 positions, 2.5% Off-circuit tapping links:
up to 9 positions, +/- 2.5% or higher
On Load Tap Changing (OLTC)
HV terminals Standard HV connections HV/MV plug-in or porcelain bushings through dedicated
Rated LV (MV) insulation cable boxes (IEC, BS or NEMA compliant)
LV terminals 1.1 kV Up to 7.2 kV
ㆍ Standard LV connections LV cable ducting interface (Canalis)
ㆍ Top or bottom entry (on request) ” Side entry through dedicated cable boxes
(IEC, BS or NEMA compliant)
Thermal protection ㆍ AN cooling system:
6 PTC sensors (or 3 PT100) + Thermal Relay
ㆍ AF cooling system:
6 PT100 sensors (or 9 PTC) + Thermal Relay

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