Ryan Labs Capabilities

 

Capabilities Energy Discharge Capability: 3.3 Million Joules Charge Discharge Capability: 300 Coulombs

Typical Waveforms: 8/20 µs, 0-200,000 A 10/350 µs, 0-25,000 A 10/1000 µs, 0-10,000 A 2 µs square wave, 0-500 A

 

 

Full Lightning Stroke Discharge Parameters:

Parameters of Lightning Flashes, Electra 80: 23-27, Berger, K., Anderson, R. B., and Kroninger, H.

• Mean discharge for Negative First Strokes: 5.2 Coulombs
• Mean discharge for Negative Subsequent Strokes: 1.4 Coulombs
• Mean discharge for Positive Strokes: 80 Coulombs
  Note: Negative strokes are associated with warm front storms, and predominate in the southeastern United States. Positive strokes, which are significantly larger, are associated with cold front storms, and are common in mountainous regions. Worldwide, 90% of all lightning strokes are negative, 10 % are positive.
• IEC Lightning Protection Level I, covers 99% of all Strokes: 100 Coulombs

Surge Protection Standards for AC Power Circuits:

IEEE C62.41.2 (2002), IEEE Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power Circuits:

• High Exposure Inductively Coupled Surge at Service Entrance: 10 kA 8/20 µs
• Level 3 Direct Lightning Flash to the Structure: 10 kA 10/350 µs

IEC 61643-1, Second Edition (2005), Low Voltage Surge Protective Devices – Part 1: Surge protective devices connected to low voltage power distribution systems – Requirements and tests.

• Class 1, Level 1 Test representing 99% Percentile Direct Strike to Facility, per mode AC surge: 20 kA 10/350 µs, 10 Coulombs.
• Class II discharge test, highest level: 20 kA 8/20 µs

Telcordia Technical Reference TR-NWT-001011, Issue 1, 1992, Generic Requirements for Surge Protective Devices (SPDs) on AC Power Circuits:

• Maximum Single Withstand Surge Current - 20 kA 8/20 µs

Surge Protection Standards for Telecommunications:

Bell System Experience

• Conducted lighting surges on short loops served by remote terminals: 2.5 kA 10/250 µs

IEC 61643-21, First Edition, (2000), Part 21, Surge protective devices connected to telecommunications and signaling networks – Performance requirements and testing methods:

• Maximum for single twisted pair, per conductor, 2.5 kA 10/350 µs

Conclusion

The surge generation capabilities of Ryan Labs™ easily exceeds the charge transfer of actual lightning discharges and all AC and telecommunications surge protection standards.