The eccentric weight (pendulum) interlocking with a large motor of the HIB series of dam-use vibrators (optional) is revolved to produce a powerful centrifugal force.
Experiments and other experiences demonstrate that the frequency range of 117 to 133 Hz in concreting is desirable in concreting.
The inverter HD 2100A as a special-purpose power supply unit is designed specifically for vibrators, producing a high frequency of 125 Hz.

More than one vibrator is used on a worksite at the same time. Inverter output can be connected to a special-purpose distribution board HIB-BS (optional) for use.

With an output capacity of 10 kVA apiece, four dam-use vibrators HIB100A can be used at the same time.
The HIB-BSA incorporates four circuit-breaker circuits.

Concreting worksites are often faraway locations with cords extended from the power supply. These vibrators are therefore equipped with operation display PATLITE lamps.
This provision allows workers to see the status of the power supply (on or off), which ensures safety and convenience. If no PATLITE lamp is needed, it can be easily detached from the vibrator.

The inverter protector comes equipped with overload, open-phase, abnormal heat-up, and various other protection features.
At the same time as an inverter trip, the causes of abnormality are displayed on the operation panel display.
That can be compared with the table, attached to the inside of the panel, of causes of trouble and actions to be taken at an abnormal stop.