Multi Transformer | 200VA (K-Factor)

1. Multi Transformer 200 VA
Multi Transformer (or Multi-Voltage Transformer) refers to a transformer with multiple primary and/or secondary taps, allowing it to be connected to or output a variety of different voltages (e.g., a primary that can accept 230V, 380V, or 415V input).

200 VA is the Apparent Power Rating of the transformer (200 Volt-Amperes). This is a very small rating, suggesting it is a Control Transformer or an Isolation Transformer used for:

Industrial control panels (supplying low-voltage power to relays, timers, and indicators).

Small-scale power supply applications for electronic equipment.

In the context of the search results, a 200VA Multi Transformer is a common product.

2. K-Factor
The K-factor is a rating that measures a transformer’s ability to withstand the additional heating effects caused by harmonic currents generated by non-linear loads.

Non-linear loads include modern electronic devices like computers, LED lighting, variable frequency drives (VFDs), and switch-mode power supplies, which draw current in distorted pulses instead of a smooth sine wave.

These distorted currents contain harmonics, which cause extra heat (particularly eddy-current losses) in a standard transformer, potentially leading to overheating and premature failure.

The K-factor is a numerical index calculated based on the harmonic content of the load.

K-1: Suitable for linear loads only (pure sine wave).

K-4, K-9, K-13, K-20, etc.: Indicate the transformer is specially designed (K-rated) with features like a 200% neutral bus and optimized windings to safely dissipate the extra heat from increasingly severe non-linear loads.

For a small 200VA Multi Transformer to have a K-factor rating means it is specifically designed to be used in an environment where it will be powering these types of non-linear electronic loads without having to be “de-rated” (oversized) to compensate for the harmonic heating.