Types of high-voltage electrodes:
- spring electrodes - D1
- rigid electrodes - FIBULAX, PIN
- pointed electrodes ISODIN - D5, D7, (D5-30), (D7-30)

Suspension and rapping:
High-voltage electrodes are fixed to tubular frames using bolts. The system of the high-voltage electrodes of each section is electrically separated from the grounded parts of the casing by means of conical porcelain insulators.
The individual frames of high-voltage electrodes and the actual electrodes are cleaned by means of mechanical rapping ensured by drop hammers attached to a shaft. The rapping is performed systematically at regular intervals.
