Pre-emptive Power and Lightning Protection

1. Pre-emptive Power and Lightning Protection

2. Ever More Sophisticated Equipment Deployed Drives Greater Power Protection Needs • Tower and site standards • Grounding program • Equipment protection improvements Traditional Grounding and Surge Protection Devices (SPDs) alone do not fully protect service integrity

3. BlitzGuard • BlitzGuard is the final line of defense for electrical systems vulnerable to lightning induced surges and protracted AC Supply fluctuations • BlitzGuard isolates vulnerable systems from the threats of: - Grid supply fluctuations - Ground Potential Rise (GPR) - Direct or near Lightning Strike

5. Why Pre-emptive Protection? Unstable AC Grid Supply Voltage is a Common Problem Worldwide • Exposing the AC Power components to high or low voltage affects site reliability • Protect through isolation of selected site equipment

6. Why Pre-emptive Protection? The most effective protection for sensitive electronic systems during lightning events is disconnection • Surge Protection Device’s (SPDs) allow some surge voltage/energy to pass through: known as “let through” • Repeated exercise of an SPD often leads to failure • SPDs are designed to cope with specific surge events

7. The results of a near lightning strike

8. The effects of lightning on electronics • Can either come through the AC grid or from the site ground to grid following an AC line or local ground strike • Results in some level of GPR • These multi-frequency electrical surges burn up electrical equipment and their power supply circuitry • Microprocessor circuitry can be damaged by a nearby strike even if they are not in use

9. Even the best of grounding systems can fail to provide the intended and expected protection

10. Why Pre-emptive Protection? • Isolation before the event is the only effective protection against Ground Potential Rise (GPR) • The combination of suitable SPDs and Pre-emptive Isolation provides the best possible level of protection

11. What does Pre-emptive Isolation deliver? • Reduced capital costs through virtual elimination of site equipment failure due to power issues • Reduced service down time • Reduced operational costs through fewer site visits; 50% reduction typical due to • Fewer equipment replacements • Fewer breaker trips requiring unnecessary site visit

12. BlitzGuard SG01 : Single Phase SG02 : Two Phase SG03 : Three Phase All models: 120V or 230V per Phase

13. Microwave & Cellular Installation in South Africa • BlitzGuard deployed in front of rectifiers • Protects Power shelf and site electronics • Lightning Sensor mounted on site building to detect threatening lightning activity

14. BlitzGuard Installation AC Supply To facility Lighting Rings & other non critical areas Meter & Breakers/ Fuses SensorGuard BlitzGuard U P S IT: Servers, PC’s, LAN Isolates AC Supply SPD’s PABX, Phones,Alarm System Building Ground Connections

15. Voltage Gradient Between Remote Locations 40KV 30KV 10KV 20KV Current Flow 40KV 10KV

16. Cell Site Power and Protection Scheme (1) Tower Strike with Conventional Protection Comment: Connections to the site grounding system are the lowest impedance path to ground for lightning fault currents. The fault will divide and flow through all available paths to the point of greatest potential difference. GPR at the tower base will find paths into the equipment as it seeks the lowest impedance path to ground. Also, the SPD may fire backwards under these conditions. Battery Co-Axial Protector - Base Transceiver Φ AC Supply Phase DC Power Supply + N Neutral AC Surge Protector (SPD) GPR Power System Grounds Tower Ground Building & Equipment Ground AC Service Ground

17. Cell Site Power and Protection Scheme (2) Tower Strike with BlitzGuard Comment: By opening the path between the site electronics and the AC power system ground (the greatest potential difference from the fault), fault currents equalize over the remaining available paths. Battery Co-Axial Protector BlitzGuard - Base Transceiver Φ AC Supply Phase DC Power Supply + N Neutral AC Surge Protector (SPD) GPR Power System Grounds Tower Ground Building & Equipment Ground AC Service Ground

18. Applications of BlitzGuard Industry Applications include: • Telecoms, both fixed line and wireless • Radio Communications (emergency services) • Energy pipeline infrastructure • Transportation Signalling • Media: TV and Radio Transmission sites • General IT and Equipment protection

19. Telecoms Fixed Line & Wireless • Protects Cellular systems against GPR • Complements Site Grounding and SPD • For DLC cabinets, mitigates against substandard grounding • Virtually eliminates rectifier/Power shelf damage • Substantially reduces line card failure • Reduces unnecessary site breaker trips

20. Telecoms Fixed Line & Wireless

21. Radio and Media Sites • Suitable for Television and Radio transmission sites • Protects site equipment from GPR when site struck by Lightning • Used to protect radio communication sites where mast exposed to lighting strike - e.g. Emergency services radio systems

22. Radio and Media Sites

23. Pipeline Infrastructure • AC Service • Rectifiers • Control Electronics • Pipeline Skin DC output terminal • Anode Bed DC output terminal All these have connections to Grounded, metallic elements – pipeline, anode bed, and local AC Service ground

24. Transportation Signalling • Signalling and communication systems on Rail systems exposed to Lighting surges • Motorway/Highway signalling infrastructure exposed by multiple dispersed grounds • Sophisticated monitoring and communications exposed

25. Many Thanks Questions? CONTACT US: EGC International Corp. 6788 N.W. 17 Ave. Fort Lauderdale FL. USA 33309 Tel: (954)979-5510 Fax: (954)979-5515