Perfection Guarantee Security Ground is science SPDSurge Protection

Perfection Guarantee Security Ground is science!! SPD(Surge Protection Devices, 서지 보호기)의 기술이해 2007년 PGS & eca 3 G 연구소 http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800

Perfection Guarantee Security Ground is science!! SPD의 기술 자료 과도전압의 발생원 Lightning Static discharges Switching transients Power cable induction Nuclear Electro Magnetic Pulse I PK Source Field Density Rise Time Lightning Static discharge NEMP 3 V/m @10 km 20 k. V at impact 50 k. V/m @500 km 600 V/µs 2 k. V/ns 5 k. V/ns V PK (10 KA) 90% 50% 10% 8µs 20µs t 8/20µs Short-circuit Current Pulse - IEC 60 -1 1. 2µs t 50µs 1. 2/50µs Open-circuit Voltage Pulse http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800

Perfection Guarantee Security Ground is science!! SPD의 기술 자료 Service Entrance Category C 3 Panelboard Category B 3 10 k. V(1. 2, 50µs) 6 k. V(1. 2, 50µs) 10 k. A(8/20µs) 3 k. A(8/20µs) Branch Panel Category A 1 Impulse Ringwave 6 k. V/500 A 100 k. Hz IEEE C 62. 41 -1991 http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800

Perfection Guarantee Security Ground is science!! SPD의 기술 자료 1 1 2 Electronic Apparatus 2 -electrode GDT in 2 -wire loop 2 3 -electrode gas discharge tube Metal oxide particles Surge Suppression diode 1500 W surge rating Conventional diode 5 W steady state rating Surge Diodes Power absorption throughout pellet volume Multiple current paths Varistors (MOV) http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800

Perfection Guarantee Security Ground is science!! SPD의 기술 자료 V V MOV I Surge Diode Secondary Element Characteristics Multi-stage SPD Operation I Device Speed Sensitivity Energy Air Gap GDT Zener Transorb Varistors Relays Fuses Fast V Fast V Slow Poor Good Poor Good Fair High Low Medium High Medium Stability Poor Good Excellent Poor Good SPD의 내부 MOV소자 http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800

Perfection Guarantee Security Ground is science!! SPD의 기술 자료 Cat A Cat C Cat B IEEE C 62. 41 Locations Incoming Surge SPD DC Power http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800

Perfection Guarantee Security Ground is science!! SPD의 기술 자료 SPD SPD http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800

Perfection Guarantee Security Ground is science!! SPD가 열화 및 노화되어 화재 • 폭발 사례 http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800

Perfection Guarantee Security Ground is science!! SPD가 열화 및 노화되어 화재 • 폭발 사례 http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800

Perfection Guarantee Security Ground is science!! SPD가 열화 • 노화되어 기능을 못 하면 ? SPD SPD http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800

Perfection Guarantee Security Ground is science!! SPD의 열화 및 노화를 진단한 사례 http: www. ground. co. kr Tel: 02 -572 -0008/080 -558 -8800