1 I. I. (1) (2) in power in Joule Rt I H R I P 2 2 () 1.
2 (1) (2) 2. ( ) ( ) ( ) ( )
10 25 50 1. 1. 150V 2. 100 3. 2. 151V 4. 300V50 3. 301V 10 3
4 (1) (2) (3) () 1. (1) ( Tracking) ( )
5 ( ) (2) ( ) ( ) ( ) ( ) ( )
6 2. (1) 10-3 cm 10 (2) (Partial Discharge)
7 ( ) 1. 2. (MP) (MF)
3. () 1. 8
9 2. (1) (2) (3) () 1. 10%
10 2. (1) (2)
11 3. (Cu 2 O) 10151041 10 0.1 mm 3 () 1. 110V ( ) 110V
2. ( ) 1.73 () 1. (Corona Discharge) 12
2. (Streamer Discharge) 3. () 1. 2. 13
14 (1) (2) 10,000-20,000 15 () 1. 2. 3.
15 ( ) 1. (1) (2) (3) (4) 2. (1) 1~10 (2) 5 20 600A~11,700A (3) 200C (4) 4~100kwh (5) 0.5~1.0 ( ) ( ) 3. (1) (2)
(3) (4) 4. (1) (2) 16
10 9 cm 10 9 cm ( ) Q V Q CV K V d C k d 10-7 mm 10-3 ~10-1 1 mm 10 3 ~10 5 1 W CV 2 2 1/4 t1/ 2 0. 693RC R C 0.012 0.012 17
() () () () ( ) 18
19 () () () () () ()
20 Q( ) C( = / ) V( ) () 1. 40~50% 1000-3000V V Q C 2. 100-300V 18,400V 3.
( ) 1 () 21
22 ( ) (b) (c) B B (d) B B
23 ( ) 1. 2. 3. 4. 5. 100g 1m () 1. 2. 3.
10 12 ~10 13 cm l 4 6 10 8 cm () 24
25 1. (1) (2) (3) (4) (2)(3) 2. 10g 10kV 40kV 0.15~0.01mm 12mJ
3. 10000V (E) (P) E = 1140 P -2.65 15kg/cm 2 0.56mJ 2 m/sec () 1. 26
27 2. 3. (1) E- ( )V- ( )Q- ( )C- ( ) VQC C V 12cm350V QV C Q CV E 2 1 2 1 2 1 2 2
(2) 1 J 1KV 1 10-7 C/m 2 100 J 5KV 1 10-6 C/m 2 1 10-4 C/m 2 100 J () 1. 2. 3. 4. (1) (2) ( ) 28
29 ( ) l. (Bonding) 2. 60~70% CO 2 30%
( ) l. 2. 30
31 ( ) II. II. 3,390 1,121 33% () 1. 2. MI 3. ( ) ( )
32 ( ) 1. 2. 3. 4. 5. 6. ( ) () 60 C
Q I 2 R I ( )R ( )Q ( 40% T1 T 2 QW T 1 T 2 W 1.6 mm 27 8.931 10-5 27 27 8.931 10-5 = 0.065 W 1.6m/m 415 0.065 415 = 27 33
34 () () () () 1.6 mm (2 mm 2 )
35 () 1. 2. 3. 4. () 1. 2. 3. 4. 5. 6. 7. () 1. 2. 3.
( ) 1. 2. 3. 4. 5. 6. () 1. 2. ( ) 3. 4. 5. 36
III. ( ) (Step Voltage) 37
1. (Protective Earthing) R A RK VK V S R R / 2 K R and / 2 B R K F R F I K R R A RA RK VK V S RA R B RK R F / 2 R A and R B R K and R F / 2 R A I K R K K VS R VS R F F / 2 / 2 RA R R A B 38
2. (Protective Multiple Earthing, PME) TN-C TN-S TN-C 39
(1) R G (2) (3) 40
(1) (2) (3) (4) (1) (2) 3. (Earth Leakage Circuit Breaker, ELCB) (1) (2) 41
1. (Ungrounded System) 25 42
2. (Resistance Grounded System) 25 3. (Solidly Grounded System) 43
Group A: Class I Group B: Group C: Group D: Class II Group E: Group F: Group G: Class III NFPA 44
(IEC) IEC IEC 79-10 Zone 0 Zone 1 Zone 2 Zone 0 Zone 1 Zone 2 IP Zone 0 ( ) Zone 1 Zone 2 1000 / 10~1000 / 10 / Zone 0 Zone 1 Zone 2 45
(Hazard Radius) IP A (1) (2) 40% B A C AB G VDE 0165 ( ) Zone 0 Zone 1 Zone 2 Zone 10 Zone 11 VDE 0165 IEC Zone 0 Zone 1 Zone 2 46
Class 1 NEC 500 Division 1 NEC 505-7 (1996) Class 1 ( ) Division 2 Class 1 Zone 0 Class 1 Zone 1 Class 2 Zone 0 Class 2 Zone 1 Class 2 Zone 2 Class 1 Zone 2 Class 1 Zone 0 Class 1 Zone 1 (1) (2) (3) (4)Class 1 Zone 0 47
Class 1 Zone 2 (1) (2) (3) (4)Class 1 Zone 1 RIIS-TR-85-1 0 ( ) 1 2 0 1 2 48
49 (IEC) 0 1 2 (1) (2) (3) (4) (5) (6) (7) 1. (d)
Threaded-joint enclosures Ground-joint enclosures 2. (o) 3. (p) 50
4. (e) 5. (q) 6. (ia, ib) 1.3W IEC 0 Ex ia Ex ia Ex ib ia 100mA 0 1 2ib 150mA 1 2 51
7. (m) 630A 8. (s) Explosion proof switch Explosion proof motor 52
53
CCTV UV-IR 54
1. 2. 3. 4. 5. 6. 7. 8. 1. 2. 3. 4. 5. 6. 1. 2. 3. CO 2 55
56