4.2.3.2.
Selecting the power cables
The calculation rules used to choose the power connection cable size are defined below:
-
Identify the current shown on the generating set's identification plate.
-
From the table below, select the circuit breaker rating directly above the current shown on the generating set's identification
plate.
-
Choose the corresponding cable size.
.
Three-phase
Permitted drop in voltage = 5% / Multi-core conductors or connected single-core conductors where rating = 4X…(1) / Cable type
PVC 70°C (e.g. H07RNF) / Ambient temperature = 30°C.
Circuit breaker
rating
(A)
Cable sizes
0 - 50m
51 - 100m
101 - 150m
mm²/AWG*
mm²/AWG*
mm²/AWG*
10
1.5 / 14
2.5 / 12
4 / 10
16
2.5 / 12
4 / 10
6 / 9
20
2.5 / 12
4 / 10
6 / 9
25
4 / 10
6 / 9
10 / 7
32
6 / 9
6 / 9
10 / 7
40
10 / 7
10 / 7
16 / 5
50
10 / 7
10 / 7
16 / 5
63
16 / 5
16 / 5
25 / 3
80
25 / 3
25 / 3
35 / 2
100
35 / 2
35 / 2
4X(1X50) / 0
125
(1)
4X(1X50) / 0
4X(1X50) / 0
4X(1X70) / 2/0
160
(1)
4X(1X70) / 2/0
4X(1X70) / 2/0
4X(1X95) / 4/0
250
(1)
4X(1X95) / 4/0
4X(1X150) / 2350MCM
4X(1X150) / 2350MCM
400
(1)
4X(1X185) / 0400MCM
4X(1X185) / 0400MCM
4X(1X185) / 0400MCM
630
(1)
4X(2X1X150) / 2x 2350MCM
4X(2X1X150) / 2x 2350MCM
4X(2X1X150) / 2x 2350MCM
Single phase
Permitted drop in voltage = 5% / Multi-core conductors / Cable type PVC 70°C (e.g. H07RNF) / Ambient temperature =30°C.
Circuit breaker
rating (A)
Cable sizes
0 - 50m
51 - 100m
101 - 150m
mm²/AWG* mm²/AWG*
mm²/AWG*
10
4 / 10
10 / 7
10 / 7
16
6 / 9
10 / 7
16 / 5
20
10 / 7
16 / 5
25 / 3
25
10 / 7
16 / 5
25 / 3
32
10 / 7
25 / 3
35 / 2
40
16 / 5
35 / 2
50 / 0
50
16 / 5
35 / 2
50 / 0
63
25 / 3
50 / 0
70 / 2/0
80
35 / 2
50 / 0
95 / 4/0
100
35 / 2
70 / 2/0
95 / 4/0
125
50 / 0
95 / 4/0
120 / 2250MCM
* : AWG. American Wire Gauge, American standard for electrical cables.
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Страница 191: ...July 2009 Pub No 99610 29120 OPERATION MAINTENANCE MANUAL 189 242 ...
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