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16 Specifications
UM5C06D ( 169-2071-504 ) P0831010 Standard 7.00 May 2001
Table 1 - Electrical specifications ( continued )
Output Protection:
A single pole 35 A circuit breaker is connected in series with the
negative output lead of the rectifier.
The rectifier contains an adjustable output current limit circuit for
protection against damage from overloads. This circuit is factory set to
limit the output current to 30 A. It can, however, be adjusted from
12.5 A to 30 A.
Output Regulation:
At point of regulation: within ± 0.5% of the selected value for all
specified input and output variations and within ± 1% for any
combination of specified input, output, and environmental conditions.
Output noise and ripple
Less than 22 dBrnC at voice frequency (with or without batteries and
measured at the point of regulation) from a 1 A load current to full load,
including the current limit mode. Less than 32 dBrnC for loads less than 1 A.
Less than 10 mVrms in any 3 kHz band between 10 kHz and 20 MHz.
Measurements are made with batteries at the output terminals of the power
shelf and with the rectifier in the local sensing mode.
Less than 250 mV peak to peak switching voltage spikes measured
differentially by an oscilloscope with a 100 MHz bandwidth.
Efficiency and Power Factor
Efficiency is better than 90% at a nominal input voltage of 240 V AC, -54 V
DC and an output load greater than 15 A.
The power factor is 0.98 at loads greater than 10 A and 0.99 for loads greater
then 20 A.
Reliability
The rectifier has a predicted mean time before failures (MTBF) greater than
120,000 hours under normal operating conditions at 30°C.
Heat Dissipation
The maximum heat dissipation is 156 W or 8.87 BTU’s / minute at -56 V /
25 A.
Electromagnetic interference (EMI)
The rectifier meets the EN50081-1 (CISPR22 and EN55022) class "B"
requirements for conducted and radiated EMI.