Since the introduction of dedicated GPO’s for computer systems, there has been an ongoing battle with ‘Nuisance Tripping’. The reason for this has been identified as the inherent transient created by the computer when it is switched on.
General Electric has addressed this issue with the introduction of the high immunity Residual Current Device. IPD Industrial Products supply high immunity Residual Current Device. The device can withstand higher surge currents (up to 3000A).
Some features of the high immunity Residual Current Device include:
- High frequency earth leakage protection
- Filtering of transient earth leakages
- Over voltages
Commercial and industrial applications of the high immunity Residual Current Device include:
- Computer GPO circuits
- Protection for lighting circuits when electronic ballasts are used
- Protection for motor control circuits where solid state devices are utilised such as VSD’s and Soft Starters