|
D
50S - W Rectangular Bus Bar: Current Ratings |
| Size |
I Bar
|
II Bars
|
III Bars
|
IIII Bars
|
| (in) |
50 c/s
|
50 c/s
|
50 c/s
|
50 c/s
|
| . |
D.C
|
A.C
|
D.C
|
A.C
|
D.C
|
A.C
|
D.C
|
A.C
|
|
1 x1/4
|
355
|
355
|
710
|
705
|
980
|
970
|
1120
|
1100
|
|
1 1/2 x1/4
|
520
|
520
|
1030
|
1020
|
1380
|
1350
|
1585
|
1535
|
|
21/2 x
1/4 |
670
|
670
|
1315
|
1290
|
1765
|
1705
|
2050
|
1940
|
|
3 x1/4
|
970
|
960
|
1805
|
1740
|
2440
|
2310
|
2860
|
2620
|
|
4 x1/4
|
1260
|
1235
|
2260
|
2140
|
3060
|
2800
|
3640
|
2300
|
|
5 x1/4
|
1545
|
1505
|
2700
|
2510
|
3660
|
3240
|
4410
|
3700
|
|
6 x 1/4
|
1840
|
1780
|
3130
|
2860
|
4290
|
3680
|
5250
|
4240
|
|
2 x1/4
|
840
|
830
|
1560
|
1500
|
2090
|
1970
|
2460
|
2260
|
|
3 x 3/8
|
1210
|
1180
|
2180
|
2050
|
2940
|
2660
|
3510
|
3030
|
|
4 x 3/8
|
1550
|
1495
|
2710
|
2480
|
3660
|
3150
|
4400
|
3560
|
|
5 x 3/8
|
1940
|
1860
|
3290
|
2930
|
4450
|
3660
|
5400
|
4200
|
|
6 x 3/8
|
2260
|
2120
|
3770
|
3340
|
5140
|
4080
|
6320
|
4680
|
|
8 x 3/8
|
2940
|
2750
|
4800
|
4150
|
6500
|
4900
|
8060
|
5740
|
|
3 x 1/2
|
1405
|
1355
|
2450
|
2240
|
3290
|
2830
|
4000
|
3240
|
|
4 x 1/2
|
1830
|
1740
|
3100
|
2720
|
4170
|
3360
|
5100
|
3900
|
|
5 x 1/2
|
2230
|
2080
|
3720
|
3120
|
5040
|
3900
|
6170
|
4550
|
|
6 x 1/2
|
2620
|
2420
|
4300
|
3500
|
5850
|
4400
|
7200
|
5100
|
|
8 x 1/2
|
3380
|
3060
|
5450
|
4450
|
7420
|
5300
|
9110
|
6150
|
|
10 x 1/2
|
4080
|
3640
|
6500
|
5000
|
8860
|
6000
|
10900
|
6850
|
Notes
- Ratings
for 50C rise over 35C ambient temperature instill but unconfined
air.
- For multiple-bar arrangements,
the space between bars is equal to the bar thickness
- A.C ratings are based on
spacing at which proximity effect is negligible
|
COMPARISON
OF REFRIGERANTS |
|
Refrigerant
|
C.O.P
|
Relative
efficiency |
H.P / Ton
|
Evaporating
press |
Condensing
press |
|
Ideal
|
5.74
|
100
|
0.82
|
.
|
.
|
|
Ammonia
|
4.75
|
82.7
|
0.97
|
19.6
|
154.5
|
|
Carbon
dioxide |
2.59
|
45.1
|
1.83
|
316.8
|
1028.3
|
|
Freon -
12 |
4.69
|
81.6
|
1.01
|
11.8
|
93.2
|
|
Methyl
Chloride |
4.62
|
80.5
|
1.02
|
6.5
|
80.0
|
|
Sulphur
dioxide |
4.74
|
82.5
|
0.99
|
2.9
|
51.8
|
|
