How are transformers installed?
Table of Contents
How are transformers installed?
Provide proper clearance for cable and avoid installing them near blades or coils. Follow minimum wire bending space clearances at terminals for conductors per NEC. If required, follow NEMA standards for transformer sound control depending upon the kVA rating of a unit. Ground, ground and don’t forget to ground.
Which cable is used for 11kV line?
The cable is suitable for rated voltage 6/11kV according to IEC 60502-2….Technical Specification.
| Cable type | Cu/XLPE/SC/SWA/PVC | |
|---|---|---|
| According to regulation | BS 6622 | |
| Rated voltage (U) | (kV) | 11kV |
| Voltage to neutral (Uo) | (kV) | 6.35kV |
| Material of conductor | Copper |
Can transformers be installed indoors?
Ventilated dry-type transformers can be designed for installation indoors or outdoors. However, if a dry-type is still preferred, you should consider using a totally enclosed, non-ventilated unit; sealed coil unit; or cast coil transformer.
What size transformer shall be installed in a transformer room?
112 1/2 kva
Transformers of more than 112 1/2 kva rating shall be installed in a transformer room of fire-resistant construction unless they are constructed with 80o C rise (Class B) or 150o C rise (Class H) insulation, and are separated from combustible material not less than 6 feet horizontally and 12 feet vertically or are …
Where should transformers placed?
Transformers should be located at least 12 in. to 18 in. away from walls and other obstructions that might prevent free circulation of air through and around each unit, unless the unit is designed for wall mounting and installed per the manufacturer.
How do I know what size cable I need for my Transformer?
For Transformer, we should choose two types of cable such as the primary side and secondary side. The rating of the cable should be 150\% of the full load current. i.e if your transformer’s primary current is 450 Amps means, you should choose 450 *150\% = 675 Amps capacity size cable.
What are the installation procedures for a Transformers?
Installation Procedures Ensure the area is well ventilated and free from explosive or corrosive gas or vapors. Check the transformer nameplate and verify that it is the correct kVA, frequency, line and load voltage for the application Mount the transformer securely
Is it safe to install an electrical transformer at ground level?
The installation should not present any threat to the normal movement of personnel or equipment. If the electrical transformer is installed at ground level, it is important to evaluate soil characteristics and soil behavior. Poor soil conditions can lead to differential settlements damaging your transformer or electrical connections.
What size base do I need for a transformer?
For pad mount transformers with ratings of 75kVA through 500kVA, a typical concrete base would be 5 1/2 x 6 1/2 ft. and 10 in. For units with ratings above 500kVA to 2500kVA, a typical concrete base would be 8 ft x 9 ft and 10 in. thick.
How much psi do I need for an electrical transformer?
If the electrical transformer is to be installed over a concrete pad, it must have at least 3,000 psi, with chamfered edges on top of the base extending 20 inches down from each end, and a typical base should be 6 x 7 feet and 12 inches.