Control and Isolation Transformers
Isolation transformer is one that contains two windings: Primary and Secondary winding, that are separated from each other but wound on the same Iron core. The secondary that governs the output is, in this manner, separated from the input. Input and output are totally independent of each other except for the magnetic linkage between the two.
Power line isolation can be provided to avoid component damages when using test instruments.
There are two kinds of Isolation Transformers:
1. Shielded type Isolation Transformer
2. Ultra Isolation Transformer
The results of an Ultra Isolation transformer are:
- It provides a perfectly balanced neutral at zero potential and neutral can be used by grounding it.
- The supply of the output is free from all surges/spikes and so called electrical noise, which predominantly is present on the input side.
- Since the output is totally isolated from the input, any short circuits or faults on the primary side are not reflected on the secondary, thus avoiding damage to the sensitive electrical equipment.
Key Features
- High efficiency, high reliability and accuracy. Compact, rugged in construction, free standing, floor mounting model and housed in sturdy metal casing with sufficient ventilations.
- Double wound with copper conductor with low coupling capacitance to isolate the voltage spikes and noise from the mains.
- Suitable for use with modern sophisticated micro processor based equipment, CNC machines, computers and other Industrial processing.
- Supply and outgoing terminals brought out with proper brass bolts and double nuts and washers under sheet secured cover with proper marking.
- The main body of the equipment shall have double earth arrangement.
- To withstand the ambient temperature up to 55 centigrade and 95% humidity.
- Transformers shall be provided with rating plate giving the details.
- No spare required for 2 years of normal operation.
SPECIFICATIONS
- Isolation resistance shall be greater than 1000 M. Ohms at 500 V DC.
- The transformer regulation shall be less than 7.5%
- Noise/Spike suppression shall be more than 135 db.
- The magnetizing current shall be less than 10% of the full current load.
- The transformer shall in general meet IS:2026.
- The transformer is provided with one electrostatic shield between the primary and the secondary.
