Avid Technology MV3000 DELTA - Interbridge Transformer for DFE Drives; Losses

T1689 Technical Manual Rev 07 Specification
MV3000 Air Cooled DELTA Reactors, Inductors & Transformers
Page 65
2.13.5 Interbridge Transformer For DFE Drives
When using DELTA rectifier modules in a 12-pulse DFE drive, it is mandatory that an interbridge transformer
replaces the d.c. link inductor. In addition to performing the same functions as a d.c. link inductor, the
interbridge transformer forces sharing between the two rectifier bridges (one supply phase-shifted by 30°).
These naturally ventilated transformers are used with 12 pulse input rectifier systems - see Table 2-14.
Reactor Order
Number
Drive (1.5 x
Overload)
Drive (1.1 x
Overload)
Nominal
Supply
Voltage (V)
Approx. Weight
R
reactor
(m
Ω
)
kg
lb
33Z0352/10
1 x MVD500
380 - 525
52
114.6
1.5
33Z0354/10
2 x MVD500
380 - 525
65
143
0.6
50Z0021/10
3 x MVD500
380 - 525
130
286
0.25
50Z0043/01
1 x MVD300
1 x MVD300
690
110
242
2.5
50Z0043/02
2 x MVD300
2 x MVD300
1 x MVD500
690
160
352
1.0
50Z0043/03
3 x MVD300
3 x MVD300
2 x MVD500
690
190
419
1.0
50Z0063/04
4 x MVD300
690
NA
0.8
50Z0063/01
5 x MVD300
4 x MVD300
3 x MVD500
690
170
374
0.6
50Z0063/02
6 x MVD300
5 x MVD300
4 x MVD500
690
215
473
0.5
50Z0063/03
6 x MVD300
690
NA
0.4
Table 2–33. – Interbridge Transformers – Weight & Resistance
2.13.6 Losses
Power loss = Idc² x R
reactor
x 0.325 Watts
Where R
reactor
is in ohms
Idc is in amperes.