ORBITAL's compact CESE active lightning rod with direct mast-mount design. ΔT = 30µs, up to 78m protection radius, 200kA tested. NFC 17-102:2011 certified.
The CONTRA 30 is ORBITAL's compact CESE (Conventional Early Streamer Emission) active lightning rod. Featuring a direct mast-mount base with integrated threaded connection, the CONTRA 30 is designed for installations where minimal footprint and fast deployment are priorities — telecom masts, rooftop equipment platforms, temporary structures and retrofit installations.
With a certified ΔT of 30µs and 200kA current withstanding, the CONTRA 30 provides full NFC 17-102 compliant active protection across all four protection levels. Its compact cylindrical body and threaded base allow direct mounting onto standard mast sections without additional hardware.
The CONTRA 30 requires no external power source, no batteries and no electronic control unit. It is entirely autonomous — once correctly installed, it operates indefinitely with only periodic inspection. All components are manufactured from 304L inox stainless steel, ensuring reliable performance in marine, industrial and tropical environments.
Independent certification: The CONTRA 30's ΔT value was verified by METU (Middle East Technical University) laboratory — an accredited NFC 17-102 test facility. Current withstanding tests conducted at HIZAL Lightning Test Lab. Full test reports available on request. Contact ORBITAL →
| Electrical Performance | |
| Advance Time (ΔT) | 30 µs — certified per NFC 17-102 Annex C test |
| Peak Current Withstanding | 200 kA (10/350µs waveform) — 2× NFC 17-102 minimum |
| Operating Principle | Ion generation — electroatmospheric capacitor + high-voltage impulse emitter |
| Protection Levels | Level I (98%), Level II (95%), Level III (90%), Level IV (80%) |
| Power Source | None — fully autonomous, powered by atmospheric electric field |
| Mechanical & Environmental | |
| Construction Material | 304L Inox Stainless Steel — all external components |
| Operating Temperature | −40°C to +85°C |
| Ingress Protection | IP67 |
| Wind Resistance | Tested to 220 km/h |
| Min. Installation Height | 2m above highest point of protected structure (NFC 17-102 minimum) |
| Recommended Height | 4–6m for optimal Rp |
| Compliance & Certification | |
| Primary Standard | NFC 17-102:2011 — Early Streamer Emission |
| CE Marking | Yes — Declaration of Conformity available upon request |
| ΔT Test Laboratory | METU (Middle East Technical University), Turkey — accredited |
| Current Test Laboratory | HIZAL Lightning Test Lab, Turkey — accredited |
| Quality Management | ISO 9001:2015 |
| Compatibility | |
| Down Conductors | Tape/strip, round conductor, insulated HVSC cable — all standard types |
| Test Equipment | ORBITAL ORB-ONE ESE Test Unit, ORB-X Strike Counter Test Unit |
| Strike Counters | VIRTU and STELLAR (all ORBITAL series) |
| Warranty | 20 years |
Protection radius Rp calculated per NFC 17-102 formula: Rp = √[h(2r − h) + ΔT(2r + ΔT)]
h = mast height above structure · r = standard radius per level · ΔT = 30µs (CONTRA certified value)
| Height (m) | Level 1 — r=20m Protection Radius (m) |
Level 2 — r=30m Protection Radius (m) |
Level 3 — r=45m Protection Radius (m) |
Level 4 — r=60m Protection Radius (m) |
|---|---|---|---|---|
| 2 | 47 | 53 | 61 | 69 |
| 3 | 47 | 54 | 62 | 70 |
| 4 | 47 | 54 | 63 | 70 |
| 5 | 48 | 55 | 63 | 71 |
| 6 | 48 | 55 | 64 | 72 |
| 8 | 49 | 56 | 65 | 73 |
| 10 | 49 | 57 | 66 | 75 |
| 15 | 50 | 58 | 69 | 78 |
107m is the maximum protection radius recognised under NFC 17-102 regardless of calculated value. For project-specific calculations use the ORBITAL Risk Calculator or contact our engineers.
