9
Efficiency
The efficiency of the whole RCB1200 power supply is determined by the efficiency of each of its sections which, in turn, is
dependent on several parameters such as input voltage, load level and on the combination of output modules. The plots below
show typical efficiencies of one section of the power unit over the full line voltage and load range and fitted with four of each
type of output module, equally loaded.
An estimate of the efficiency for any particular system may be obtained from these graphs using the procedure outlined in the
example below.
Example:
Estimate the efficiency of an RCB1200-AABCDDDD, at 160 V
RMS
input, 100 W load on each output of the first
section and 140 W on each output of the second section.
1.
Define load efficiencies for each output module at specified load and 220 V
RMS
.
2.
Define change in efficiency from 220 V
RMS
to 160 V
RMS
for each output module.
3.
Sum the values from step one and two for each output module.
4.
Calculate the average efficiency for the total system.
Step
Details
Slot 1
OP-A
Slot 2
OP-A
Slot 3
OP-B
Slot 4
OP-C
Slot 5
OP-D
Slot 6
OP-D
Slot 7
OP-D
Slot 8
OP-D
1
Є
220
(Load chart)
0.85
0.85
0.88
0.88
0.89
0.89
0.89
0.89
2
∆Є
(220-160)
(Line chart)
-0.01
-0.01
-0.01
-0.01
-0.01
-0.01
-0.01
-0.01
3
Є
x
= Є
220
+
∆Є
(220-160)
0.84
0.84
0.87
0.87
0.88
0.88
0.88
0.88
4
Є
AVE
= (Є
1
+ Є
2
+ Є
3
+ Є
4
+ … + Є
8
)/8
0.867
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