AC loads
AC loads in the form of test and measurement equipment are used for simulation of electrical devices connected to an Alternating Current (AC ) power grid. They are often there for single phase and/or three phase systems.
By using AC loads, we can check the energy source for certain properties and see if the energy source also meets certain standards.
Think of simulating dimmers, testing switches, fuses, etc.
Besides components, AC sources such as UPS systems, (solar) inverters, frequency converters, AC generators and AC power supplies are also tested with AC loads.
Does the AC source work properly at a certain Power Factor, Crest Factor, phase shift in a three-phase system, or certain harmonic distortions?
In TTMS’ product portfolio, we still distinguish between pure resistance AC loads and electronic AC loads where we electrically simulate a certain load.
The AC loads come with capacities from single-phase 500VA to three-phase 1,200kVA systems.
In frequency range we look up to max 2400Hz with the exception of a small single phase bipolar unit up to 150kHz. Voltage ranges run from 277Vl-n to 440Vl-n allowing us to test any standard grid in the world.
Regenerative AC loads
Regenerative AC loads represent a more advanced category of AC electrical loads that are capable of not only electrically loading, but also feeding the energy released in the process back to the power grid. So where conventional loads converted the energy into heat, now the energy is reused. This results in double savings because the energy is reused and no air conditioning is needed to cool the test room.
Regenerative AC loads are mainly for higher power ratings.
These include power ratings from 7.5kVA to 1200kVA. The frequency range runs to max 2400Hz and the voltage ranges from 277Vl-n to 440Vl-n, allowing us to test any standard grid in the world.
The regenerative AC loads in our range can be used as a DC load in addition to AC. And with some units even with the addition of an AC+DC load and a DC+AC load. All loads have a Constant Current, Constant Voltage, Constant Power and Constant Resistance mode.
Applications of regenerative AC loads include testing UPS systems, (solar) inverters, frequency converters, AC generators and AC power supplies.
