מתקנים ביתיים ותאורה
✦ בנוי על ידי פהד גאנם ✦
العربية
☀ מצב בהיר
1
▾
✕
I =
P
U
| n
x
= n − 2 | U = 230 V | f = 50 Hz
1.0×
0
0
0
0
n = 3 | n
x
= n − 2 = 1
S1
X
S2
L
1
=
1
●
1
=
2
○
1
×
1
○
1
×
2
●
2
=
1
○
2
=
2
●
2
×
1
●
2
×
2
○
I =
P
U
=
8 W
230 V
= 0.03 A
2
▾
✕
I =
P
U
| ΔU = I · R | R =
ρ · 2L
A
| U
end
= U − ΔU | U = 230 V | ρ
Cu
= 0.0175 Ω·mm²/m
16 A
40 A
20 m
2.5 mm²
10 A
0
0
0
0
I
1
=
P
1
U
=
2000 W
230 V
= 8.70 A
I
2
=
P
2
U
=
900 W
230 V
= 3.91 A
I = I
1
+ I
2
= 8.70 A + 3.91 A = 12.61 A
R =
ρ · 2L
A
=
0.0175 · 2 · 20
2.5
= 0.28 Ω
ΔU = I · R = 12.61 A · 0.28 Ω = 3.53 V
U
end
= 230 V − 3.53 V = 226.47 V
ΔU
U
=
3.53 V
230 V
= 1.54 %
3
▾
✕
Φ = η · P | P =
Φ
η
| E =
Φ
A
| [η] =
lm
W
[E] = lux
800 lm
2400 lm
20 m²
0
0
0
P =
Φ
η
=
800 lm
13 lm/W
= 61.5 W
P =
Φ
η
=
800 lm
120 lm/W
= 6.7 W
ΔP = 61.5 W − 6.7 W = 54.8 W
P
inc
P
LED
=
η
LED
η
inc
=
120 lm/W
13 lm/W
= 9.2
E =
Φ
A
=
2400 lm
20 m²
= 120 lux
4
▾
✕
E = P · t | E [kWh] =
P [W] · t [h]
1000
| ΔE = (P
1
− P
2
) · t |
ΔE
E
1
· 100 % | Φ = η · P
10
5.0 h
0.50 ₪
0
0
0
0
0
0
t = 5 h · 365 = 1825 h
P
1
= 10 · 60 W = 600 W
P
1
=
600 W
1000
= 0.6 kW
E
1
= P
1
· t = 0.6 · 1825 = 1095 kWh
P
2
= 10 · 8 W = 80 W
P
2
=
80 W
1000
= 0.08 kW
E
2
= P
2
· t = 0.08 · 1825 = 146 kWh
ΔE = E
1
− E
2
= 1095 − 146 = 949 kWh
ΔE
E
1
· 100 =
949 kWh
1095 kWh
· 100 = 86.7 %
Cost = ΔE · T = 949 kWh · T
★
▾
✕
I =
P
U
| ΔU = I·R | R =
2ρL
A
| Φ = η·P | E =
Φ
A
| U = 230 V
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