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14 Specifications
UM5C05C P0745680 Standard 6.00 October 2001 Emerson Energy Systems
2.2. Operation specifications and ambient conditions
Table 3 - Operation specifications of the rectifier
Output regulation :
At the output terminals, the voltage is within ±0.5% of
the set voltage value for all specified input and output
variations, and within ±1% for any combination of
specified input, output and ambient conditions.
Temperature drift :
Unless otherwise stated, all input and output
parameters such as input voltage range, output current
and voltage, current limit, etc. shall not vary more than
2% over the operating temperature range.
Output noise and
ripple :
• less than 22 dB of random noise on C band at voice
frequency over the entire operating range of the
rectifier, including operation in the current limit mode,
and at low, nominal and high input voltage conditions
( with or without batteries and measured at the point
of regulation )
• less than 20 mV RMS in any 3 kHz band between 10
kHz and 20 MHz ( measurements made with or
without batteries at the output terminals of the
rectifier and with the rectifier in the local sensing
mode )
• less than 250 mV peak to peak switching voltage
spikes ( measured differentially with an a 100 MHz
oscilloscope )
Total harmonic
distortion ( THD ) :
Less than 5%.
Efficiency :
Better than 89% at a nominal input voltage of 350 V ac
and for an output current ( load ) greater than 80 A.
Power factor :
Better than 99% with an output current ( load ) greater
than 80 A.
Heat dissipation :
The maximum heat dissipation is 1420 watts
( 4846 BTU / hr ) for an output current ( load ) of 200 A
at –58 V dc ( when the ac input is 330-475 V )
Electromagnetic
interference ( EMI ) :
The NT5C05CA / CB rectifiers when used in the
rectifier cabinet NT6C43CA / CB ( equipped with the
ac EMI filter kit NT6C18KB, or the NT5C05CC without
external EMI filter ) meet the CISPR requirements for
conducted and radiated EMI as specified in Publication
22 for Class "A" equipment.
Reliability:
The rectifier has an MTBF greater than 120 000 hours
under normal operating conditions, at 77°F ( 25°C ) as
per Telcordia Technologies TR332 method.