Sedecal SHF-310 - Line Powered Generators - Recommended Wire Size

HF Series Generators
Pre-Installation
PI-1005R3
15
3.4 LINE POWERED GENERATORS -- RECOMMENDED WIRE SIZE
Correct sizing of the feeder wires is critical to proper Generator operation. Wire
size is dependent on the Generator power, the line voltage and the distance
from the Distribution Transformer to the Generator Cabinet. The maximum
voltage drop during an exposure must not exceed 5% of the nominal mains
value.
It is recommended that the Distribution Transformer (Hospital) used as power
source have at least a power of the 25% more than the maximum power of the
X-ray Generator.
Recommended wire sizing is indicated in Table 3-1. These lengths are
measured from the Distribution Transformer to the Room Electrical Cabinet
(room disconnect). From the Room Electrical Cabinet to the Generator
Cabinet 16 mm
2
(AWG 6) may be used as long as that length does not
exceed 6 m (20 ft). The maximum wire size that can be connected to the
Generator Cabinet (Input Line Fuse Holder) is 35 mm
2
(AWG 2).
Table 3-1
Minimum Wire Size from Distribution Transformer to Room Electrical Cabinet
G
E
N
E
R
A
T
O
R
LINE
WIRE SIZE AT:
GENERATOR
L
I
N
E
VOLTAGE
15 m 30 m 45 m 60 m
208 VAC *
50 mm
2
AWG 1/0 95 mm
2
AWG 3/0 120 mm
2
AWG 4/0 -- --
32 kW, 1φ
230 VAC 50 mm
2
AWG 1/0 95 mm
2
AWG 3/0 120 mm
2
AWG 4/0 -- --
,
φ
240 VAC 50 mm
2
AWG 1/0 95 mm
2
AWG 3/0 120 mm
2
AWG 4/0 -- --
208 VAC *
35 mm
2
AWG 2 70 mm
2
AWG 2/0 95 mm
2
AWG 3/0 120 mm
2
AWG 4/0
230 VAC 35 mm
2
AWG 2 70 mm
2
AWG 2/0 95 mm
2
AWG 3/0 120 mm
2
AWG 4/0
240 VAC 25 mm
2
AWG 4 50 mm
2
AWG 1/0 83 mm
2
AWG 3/0 105 mm
2
AWG 4/0
32 kW, 3φ
400 VAC 16 mm
2
AWG 6 35 mm
2
AWG 2 50 mm
2
AWG 1/0 70 mm
2
AWG 2/0
,
φ
415 VAC 16 mm
2
AWG 6 35 mm
2
AWG 2 50 mm
2
AWG 1/0 70 mm
2
AWG 2/0
440 VAC 16 mm
2
AWG 6 35 mm
2
AWG 2 50 mm
2
AWG 1/0 50 mm
2
AWG 1/0
480 VAC 16 mm
2
AWG 6 25 mm
2
AWG 4 35 mm
2
AWG 2 50 mm
2
AWG 1/0
208 VAC *
70 mm
2
AWG 2/0 120 mm
2
AWG 4/0 120 mm
2
AWG 4/0 -- --
40 kW, 1φ
230 VAC 70 mm
2
AWG 2/0 120 mm
2
AWG 4/0 120 mm
2
AWG 4/0 -- --
,
φ
240 VAC 70 mm
2
AWG 2/0 105 mm
2
AWG 4/0 120 mm
2
AWG 4/0 -- --
208 VAC *
35 mm
2
AWG 2 70 mm
2
AWG 2/0 105 mm
2
AWG 4/0 120 mm
2
AWG 4/0
230 VAC 35 mm
2
AWG 2 70 mm
2
AWG 2/0 105 mm
2
AWG 4/0 120 mm
2
AWG 4/0
240 VAC 35 mm
2
AWG 2 70 mm
2
AWG 2/0 95 mm
2
AWG 3/0 120 mm
2
AWG 4/0
40 kW, 3φ
400 VAC 25 mm
2
AWG 4 50 mm
2
AWG 1/0 70 mm
2
AWG 2/0 83 mm
2
AWG 3/0
,
φ
415 VAC 25 mm
2
AWG 4 35 mm
2
AWG 2 70 mm
2
AWG 2/0 70 mm
2
AWG 2/0
440 VAC 16 mm
2
AWG 6 35 mm
2
AWG 2 50 mm
2
AWG 1/0 70 mm
2
AWG 2/0
480 VAC 16 mm
2
AWG 6 35 mm
2
AWG 2 50 mm
2
AWG 1/0 70 mm
2
AWG 2/0
NOTE: -- For lines at 210 VAC or below an auxiliary boost transformer is required to adequate the line voltage to the Generator input.