HL120-22
Article number: 10 240- Voltage limiting device VLD – O + F for AC or DC traction systems public transportation as are tram or trolleybus systems.
- Intended for the protection of non-live parts of metal structures.
- Ensure the equipotential bonding between inactive parts, which are not conductively interconnected due to the operating conditions.
- Used for effective protection of persons who may get in touch with these parts in the event of a lightning strike or traction line failure.
- Installed directly on the protected construction structure with connection to the track.
- In the event of a fault by short-circuiting the structure with the track, a quick-release switch will react and interrupt the power supply of the traction line.
- Resistant to vandalism, acid rain and mechanical damage.
| Class of VLD according EN 50526-2 | 2.2 | |
| Polarity | Bidirectional | |
| Type of VLD according EN 50122-1:2011 | VLD-F, VLD-O | |
| Maximum non-triggering AC voltage | UW | 60 V |
| Nominal triggering DC voltage | UTn | 120 V |
| Short time withstand current DC (25 ms repeatable) | IW | 4.7 kA |
| Short time withstand current DC (100 ms unrepeatable) | IW | 20 kA |
| Rated current DC (60 min) | Ir | 105 A |
| Lightning current impulse (8/20) | Iimp-n | 40 kA |
| High charge impulse (10/350) | Iimp-hc | 35 kA |
| Varistor voltage DC at 1 mA | UV | 180 V |
| Residual voltage at Iimp-n | Ures | ≤ 500 V |
| Response time at lightning current impulse | tR | < 25 ns |
| Response time of thyristor | tR | < 1.2 ms |
| Housing material | Stainless steel | |
| Degree of protection | IP67 | |
| Product placement environment | External | |
| Operating temperature | ϑ | - 40 ÷ 55 °C |
| Altitude | Without limits | |
| Operating position | Vertical | |
| Installation | On the flange, Using two M12 screws | |
| Tightening torque for mounting to the structure | 56 Nm | |
| Tightening torque for equipotential bonding conductor connection | 32 Nm |