all specifications... RESA Power. Actual photos of this 3,000 KVA Dry Substation Transformer in its current condition are shown above. Square "D" Dry Substation Transformer, power ratings of 3,000 KVA and 4,000 KVA, 60 Hz, 5.85 impedance, 3φ, primary side voltage of 13800v (5 taps), secondary side voltage of 4160v.
Where outdoor dry-type transformers are shown on the drawings, they shall include thermostatically controlled space heaters fed from [an external source which remains energized when the transformer is de-energized] [a fused control power transformer connected to the primary side of the substation transformer].
Altitude: ≤ 2000 m.
Temperature range: -5 °C to +40 °C, and the average temperature within 24 hours should not exceed +35 °C.
The relative humidity should not exceed 50% at +40 °C, and higher relative humidity is allowed at low temperature (90% at +20 °C). And air must be clean.
Workplaces should be free of fire, explosion, serious pollution, chemical corrosion and severe vibration.
Gradient: ≤ 5°, vertical installation.
Temperature range of transportation & storage: -25 °C to +55°C, and the temperature can be up to +70 °C in short time (within 24 hours).
Transformers are often one of the most costly and critical pieces of equipment installed in a power system. In order to achieve the greatest value out of this investment, it is vital that transformers are properly installed, designed, and manufactured. Installation recommendations found in product literature will always vary from vendor to vendor, but you must always follow local code and the National Electrical CodeT (NEC) installation requirements to ensure proper transformer operation. This paper will explore the most important aspects of dry-type distribution transformers installation and inspection in order to provide general guidelines when evaluating an existing installation or overseeing new construction.
Cabinet part: all right-angled parts that operators may come into contact with are all reversed at R angles to prevent scratching and hurting people; the improved busbar frame is more convenient to install busbars and has a more beautiful appearance; the ventilation grid installed on the top cover has anti- Drip function; the top cover is an open structure, which is convenient for users to place horizontal busbars on site;
2. Drawer part: the drawer adopts double-folding positioning groove rivet riveting process, and all parts are molded at one time, so that the drawer is 100% interchangeable. At the same time, the double-folding and rivet technology solves the defects of sheet burr and self-tapping screw tip injury;
3. Connectors: The first-time plug-in for the incoming and outgoing lines of the drawer can be directly used in conjunction with the function board and the metal channel, and the secondary connector is convenient to connect and the wiring is beautiful;
4. Vertical channel: half functional board or iron rectangular channel can be selected, and can be easily interchanged.