DISTRIBUTION TRANSFORMERS
CHARACTERISTICS:
Power: 15 to 300 kVA
High Voltage: 15 and 24,2 kV
Low Voltage: 380/220 or 220/127V
Standards: according to ABNT / IEC
APPLICATION:Power Distribution
SELF-PROTECTED TRANSFORMERS
CHARACTERISTICS:
Power: 45 to 150 kVA
High Voltage: 15 or 24,2 kV
Low Voltage: 380/220; 220/127V
Standards: according to ABNT / IEC
APPLICATIONS:Protection of distribution systems against overloads;
Short-circuit Protection for the secondary network;
Protection against internal transformer faults.
UNDERGROUND TRANSFORMERS
CHARACTERISTICS:
Power: 150 to 2.000 kVA
High Voltage: 15 or 24,2 kV
Low Voltage: 216.5/125; 220/127; 380/220; 400/231V
Standards: according to NBR 9369/1986 ABNT
APPLICATIONS:Installation into chambers, at any level;
Can be eventually immersed in water.
INDUSTRIAL TRANSFORMERS
CHARACTERISTICS:
Power: 500 to 5000 kVA
High Voltage: 15; 24,2; 36,2 or 72,5 kV
Low Voltage: 4160/2402; 440/254; 380/220; 220/127V
or according to customer specifications.
Standards: according to ABNT / IEC
APPLICATIONS:Industrial Substations.
POWER TRANSFORMERS
CHARACTERISTICS:
High Voltage: up to 550 kV
Top Rate: from 5 to 300MVA
Standards: IEC / ANSI
APLICATIONS: Utilities Substations
We offer numerous Power Transformers in the toroidal design. For your convenience, we have added the expected DC output, should the transformer be rectified.
The DC output is calculated with a standard full-wave bridge rectifier with a large capacitor. Any of these primaries can be easily used to configure custom secondaries at a reduced cost compared to a full custom design.
For SCR (Silicon Control Rectifier) variable speed motor drive applications, a transformer is needed to magnetically isolate the incoming line from the motor drive. The transformer must also provide a voltage change to match the required voltage of the SCR Drive. Standard designs are delta primary and wye secondary to match the common power sources required in most three phase rectifier circuits.
The Sola/Hevi-Duty K-Factor design is a specialized transformer that offers these benefits:
Conductors capable of carrying the harmonic currents of non-linear loads without exceeding the temperature rating of the insulation system. Paralleled conductors are used to reduce and control skin effect losses.
A transformer design that takes into account the increase in naturally occurring "stray" losses caused by non-linear loads. These losses cause standard transformers to dramatically overheat and substantially shorten design life. The K-Factor is designed to function within safe operating temperatures.
A core and coil design that manages the DC flux caused by triplen harmonics*. As these harmonics increase, they cause additional current to circulate in the delta winding. This produces a DC flux in the core which leads to core saturation, voltage instability and overheating.
K-Factor transformers are UL 1561 listed.
Designed to supply non-linear loads without overheating the windings or saturating the core.
All Sola/Hevi-Duty K-Factor transformers have a rated temperature rise of 150°C.
