ACME DTHA0112S TFMR 3PH 11KVA 575-230Y133

DRIVE ISOLATION TRANSFORMERS
The Acme Drive Isolation Transformers are specifically designed to accommodate the special voltages and kVA sizes unique to AC and DC motor drive applications.

Why use a Drive Isolation Transformer?
Motor drives are popular because they are easy to control and help save energy. The basic motor drive uses a rectifier, made up of diode bridges or silicon controlled rectifiers (SCR), to convert AC to DC. In three-phase circuits, there is a brief moment when more than one SCR is on at the same time creating a momentary short. This short puts stress on the upstream transformer and causes a distorted voltage waveform, which can have a damaging effect on the transformer itself and electrical equipment connected to the circuit.

What is a Drive Isolation Transformer?
The Acme Drive Isolation Transformers are specifically designed to handle the mechanical stresses, voltage distortions, and harmonics associated with AC and DC variable speed drives.

Acme’s Drive Isolation Transformers maximize the power quality benefits gained from standard isolation transformers by:

• Preventing overheating due to harmonics
• Limiting harmonic peaks
• Increasing the ground fault tolerance of connected variable frequency drives
• Minimizing the transfer of inverter switching noise

Features

• UL Type 3R Enclosures with Weather Shield on Ventilated Units (above 20 kVA). Type 2 Enclosure without weather shield. UL Listed and CSA certified. 7.5–20.0 kVA are encapsulated, UL 3R.
• 3-Phase 60 Hertz.
• 180°C and 220°C insulation systems.
• Encapsulated and ventilated designs. All ventilated units, are of strip wound construction. Acme’s reinforced core assemblies enhance quiet operation.
• Nominally 6% impedance.
• Designed for use with AC, adjustable frequency or DC drives.
• Full capacity taps are featured on all units. On 7.5 through 20 kVA units, taps are 1-5% ANFC and 1-5% BNFC. On 27 through 880 kVA units, taps are 2-21/ 2 % ANFC and 2-21/ 2 % BNFC.
• Full range of kVA ratings cover all standard drive systems.
• Ample wiring compartment for easy cable entry.
• Optional wall mounting brackets for certain sizes.

Please note that this product does NOT qualify for free shipping and may require truck freight.

Selection Table:

• Primary 575V Delta Secondary 230Y/133
• Primary 575V Delta Secondary 460Y/266