In many communications and computer installations separate earth systems are often specified for three reasons - noise,security and local regulations can determine that separate earth systems are to be employed.
It is not uncommon for separate earths for lightning, mains power, computer (quiet earth) and communications to be installed.
ILSE's Transient Earth Clamp (TEC) prevents earth potential differences by operating only under transient conditions to effectively clamp all connected earths together.
Under normal condition the TEC presents an effective open circuit, once the earth potential difference exceeds the breakdown voltage of the TEC, conduction immediately occurs and the earth potentials are equalised. The TEC is a self-restoring device and has a life of over ten thousand operations.
| ILSE Transient Earth Clamp: ILSE TEC100 | |
| Technical Data | |
| Application: | Prevents earth potential differences |
| Ordering Code: | TEC100 |
| Rated DC Sparkover Voltage (100V/s): | 350V |
| Tolerance: | +/-20% |
| Impulse sparkover voltage (1kV/μs): | 1000V |
| Arc Voltage: | >80V |
| Insulation Resistance (at 100 Vdc) | >1G Ohms |
| Capacitance @ 1MHz: | 10pF |
| AC discharge current (50Hz; 1s; 5 times): | 100A |
| Rated Impulse discharge current (8/20μs): | 100kA |
| Max. Discharge current (8/20μs; 1 time): | 150kA |
| Max. Discharge current (10/350μs; 1 time): | 60kA |
| Dimensions: | 175mm (L) x 25mm (D) Cable Leeds: 300mm on each end |