Project Description
FDB2-24
Description
Surge arrester with a low-capacitance protective circuit for protecting intrinsically safe measuring circuits and bus systems. Application: Flow sensors, temperature sensors.
- Easy to mount on the spare cable gland of field devices
- Self-capacitance and self-inductance negligibly small
- Stainless steel housing with pressure-resistant encapsulation
| Type | FDB2-24 |
| SPD according to EN 61643-21 / IEC 61643-21 | type 2 / class II |
| Nonimal voltage Un | 24 V |
| Max. continuous operating a.c. voltage Uc | 22.6 V |
| Max. continuous operating d.c. voltage Uc | 32 V |
| Max. input voltage acc. to EN 60079-11 Ui | 30 V |
| Max. input current acc. to EN 60079-11 Ii | 0.55 A |
| Nominal current IL | 0.55 A |
| D1 Lightning impulse current (10/350 μs) line-PG (Iimp) | 1 kA |
| C2 Total nominal discharge current (8/20 μs) (In) | 10 kA |
| C2 Nominal discharge current (8/20 μs) line-line (In) | 150 A |
| C2 Nominal discharge current (8/20 μs) line-PG (In) | 10 kA |
| Voltage protection level line-line for In C2 (Up) | ≤ 58 V |
| Voltage protection level line-PG for In C2 (Up) | ≤ 1700 V |
| Voltage protection level line-line at 1 kV/μs C3 (Up) | ≤ 50 V |
| Voltage protection level line-PG at 1 kV/μs C3 (Up) | ≤ 1200 V |
| Cut-off frequency line-line (fG) | 67 MHz |
| Capacitance line-line (C) | ≤ 25 pF |
| Capacitance line-PG (C) | ≤ 15 pF |
| Range of operating temperatures (TU) | -40/+80°C |
| Degree of protection | IP67 |
| For mounting on (field / device side) | M20 x 1.5 male thread |
| Connection | connecting lines (1.3 mm2) |
| Length of the connecting line | Approx. 150 mm |
| Earthing via | connecting line |
| Enclosure material | stainless steel |
