User manual

30 Specifications
UM6C28C P0728920 Standard 11.00 April 2001 Emerson Energy Systems
Table 10 – Mechanical specifications of the Helios Rectifier 50/48
Figure Height Depth Width Weight
10 12.9 inches
( 32.77 cm )
12.0 inches
( 30.48 cm )
6.0 inches
( 15.24 cm )
22.0 lbs
( 9.98 kg )
Electrical specifications Helios Rectifier 50/48
The electrical specifications of the Helios Rectifier 50/48 are listed in
Table 11.
Table 11 – Electrical specifications of the Helios Rectifier 50/48
Parameter Specification
Input voltage:
208/240 V ac, 1-phase, 47-63 Hz
Input voltage range: 176 to 264 V ac
Input current:
15 A nominal at 208 V ac input and –56 V dc, 50 A output
Recommended AC
service input:
20 A, 2- pole AC circuit breaker
Output voltage:
Float: –46 to –56 V dc
Equalize: 0 to 4 V dc above Float
Maximum: –59.5 V dc
Output current:
50 A for each rectifier
150 A for a three position shelf
Input protection:
A two pole / 20 A circuit breaker opens both lines.
Output protection:
The rectifier is protected by a 60 A circuit breaker at the
output. The output current is limited to a value adjustable
from 50% to 105% of the rated capacity of the rectifier
( factory set to 52.5 A ).
Output regulation:
The rectifier output voltage is automatically regulated to
remain within ± 0.5% of the selected value under all load
conditions and within the specified input voltage,
frequency, and ambient temperature ranges. And within
+ 1% for any combinations of specified input, output and
environmental conditions.
Efficiency:
Efficiency is better than 88% at a nominal input voltage of
208/240 V ac and an output load greater than 20 A.
Power factor:
Power factor is 0.99 at a nominal input voltage of 208 V
ac and an output load of 50 A.
Electromagnetic
interference (EMI):
The rectifier meets the FCC requirements for conducted
and radiated EMI for Class “A” equipment.
Heat dissipation:
380 W ( 1298 Btu/hr )