TECHNICAL DOCUMENTATION
Do you need technical documentation for your equipment?
In the product datasheet you will find drawings and certifications that you can download in PDF, DXF and STP format.
Access all the documentation for your equipment by searching for the reference.
MAINTENANCE OF TRANSFORMERS
Dry type transformers, unlike oil-filled transformers, offer advantages and ease of maintenance. However, they require a series of checks to maintain the service life of the transformer. The frequency of these checks depends on the environmental and operating conditions of the transformer.
It is also important to check the connection of the wires to the connections and to make sure that the terminal bolts are still tight. If not, all connections should be retightened.
Learn more about how to protect a transformer with our online resources.
FAQ’s
Do you have a problem with your equipment?
Explore these frequently asked questions and technical doubts and find the answer you need. Or contact us.
Converting an installation with two phases (two-phase network) to another network with phase and neutral (single-phase network) is very easy to do thanks to our single-phase isolation transformers (“P”, “Q”, “N”, “PXR” and “TK5IN” series).
This need arises mostly because a machine (air conditioning, boiler, etc.) whose control board requires an isolated neutral must be supplied.
To carry out this procedure: we will use a single-phase transformer with the appropriate power, which we will connect in the primary with the two phases and at the output, we will make a bridge between one of the phases of the output and earth. From this moment on, this line will act as neutral.
When a three-phase network does not have a neutral, there are different options for generating it.
- We can generate a neutral with artificial neutral autotransformers, which allow us to create a floating neutral, thus providing 230V between phase and neutral for single-phase loads. This will not be referenced to earth to avoid problems and differential tripping, so between neutral and earth we will find floating voltage.
- If we need to reference the neutral to earth, we can generate neutral through three-phase isolation transformers, which have 400V input and 400V + Neutral output. Thanks to circuit isolation, we can reference the neutral to earth, achieving a grounded neutral.
When a three-phase network does not have a neutral, there are different options for generating it.
- We can generate a neutral with artificial neutral autotransformers, which allow us to create a floating neutral, thus providing 230V between phase and neutral for single-phase loads. This will not be referenced to earth to avoid problems and differential tripping, so between neutral and earth we will find floating voltage.
- If we need to reference the neutral to earth, we can generate neutral through three-phase isolation transformers, which have 400V input and 400V + Neutral output. Thanks to circuit isolation, we can reference the neutral to earth, achieving a grounded neutral.
If you have a 230V network, it is possible to switch to a 400V + neutral network. At POLYLUX we have the TTU series, isolation step-up transformers that can raise the voltage from 230V to 400V, as well as generating neutral and being able to reference it to earth thanks to the isolation of the circuits.
Another option is to use our AUT series reversible autotransformers for voltage changes and to generate artificial neutral. In this case, the neutral will be floating (between earth and neutral we will find floating voltage) and will not be referenced to earth to avoid problems and differential tripping.
This situation can occur for two reasons:
- Incorrectly dimensioned transformer input protection. When the transformer is connected, the circuit breaker jumps due to the current peak when the transformer is connected due to the magnetization of the core, whether the core has a load.
- Higher consumption than expected. Although the transformer input protection is well dimensioned, the consumption causes the secondary circuit breaker protections to trip.
Solutions to prevent the transformer circuit breaker from tripping:
- In the first case, we must ensure that the transformer input protection is correctly sized.
- In the second case, the connected loads must be checked to ensure that consumption is below the maximum admissible current. In the case where the connected loads cannot be reduced, the choice of transformer power has not been correct and a higher transformer power must be chosen.
Click for more information on how to protect a transformer.
The choice of the power of a transformer depends on the consumption of the loads to be connected. It is important to choose a power rating that is suitable for the loads connected so that their consumption does not exceed the admissible nominal parameters. Otherwise, a higher consumption than expected will cause the circuit breaker protections to trip and the transformer to burn out.
Furthermore, if the equipment chosen has a higher power rating than necessary, its consumption and no-load losses will be higher, entailing an unnecessary extra cost. Also, the connection to the mains is made difficult or impossible due to the connection point of the starter, which makes it impossible to connect the equipment because it causes the head-end protection to trip.
The transformer is the only static machine that exists. When voltage is applied to it, it experiences a consumption peak due to the energy used to energize the core, to create the magnetic field that makes it possible to have the voltage at the transformer output.
One of the reasons why this phenomenon may occur is because the transformer is at the end of the line and, at certain times of the day line and, at certain times of the day, more or less voltage arrives depending on the number of users connected. If we want to maintain a constant voltage, we should install a voltage stabilizer to ensure a constant supply voltage.
The IP values are the different degrees of protection of the equipment against external elements, such as water or dust:
- IP-00: Not protected from solids and water.
- IP-20: Protected from solids over 12 mm in diameter, but not protected from water.
- IP-23: Protected from solids over 12 mm in diameter and from water spray no more than 60º from the vertical.
- IP-31: Protected from solids with a diameter greater than 2.5 mm and from vertically dripping water.
- IP-42: Protected from solids with a diameter greater than 1.0 mm and from water srpay less than 15º from the vertical.
- IP-54: Protected from contact with external elements and from dust ingress (deposits in quantities harmful to the appliance) and from water spray in any direction.
- IP-65: Fully protected from dust ingress and from any contact. Protected from pressure water jets in any direction.
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