User manual

26 Specifications
UM6C28C P0728920 Standard 11.00 April 2001 Emerson Energy Systems
Electrical specifications of the MPR25 rectifier
The electrical specifications of the MPR25 rectifier are listed inTable 7.
Table 7 – Electrical specifications of the MPR25 rectifier
Parameter Specifications
Input voltage:
208/240 V ac, one phase, 47-63 Hz
Input voltage range: 176 to 264 V ac
Input current:
12 A nominal at 208 V ac input and –56 V dc, 25 A output
Recommended
AC service input:
50 A, 2-pole AC circuit breaker for each shelf for common
AC feed
20 A, 2-pole AC circuit breaker for each rectifier for
individual AC feed
Output voltage:
Float: –46 to –57 V dc
Equalize: 0 to 2.5 V dc above Float
Maximum: –59.5 V dc
Output current:
25 A for each rectifier
75 A for a three position shelf
Input protection:
A 2 pole / 20 A circuit breaker opens both lines.
Output
protection:
The rectifier is protected by a single pole 30 A circuit
breaker at the output. The output current limiting circuit is
factory set 27.5 A and is not field adjustable.
Efficiency:
Efficiency is 88% at a nominal input voltage of 208 V ac
and loads greater than of 15 A.
Power factor:
Power factor is 0.60 at a nominal input voltage of 208 V ac
and an output load of 25 A.
Heat dissipation:
190 W ( 649 Btu/hr )
Helios Rectifier 25/48
Mechanical specifications Helios Rectifier 25/48
The mechanical specifications of the Helios Rectifier 25/48 are listed in
Table 8.
Table 8 – Mechanical specifications of the Helios Rectifier 25/48
Figure Height Depth Width Weight
8 6.60 inches
( 16.76 cm )
11.25 inches
( 28.58 cm )
6.0 inches
( 15.24 cm )
14.3 lbs
( 6.49 kg )