800 amp, -48 VDC Rectifier Description Key Features ® The Lorain RHM rectifier is available in an 800 amp model to provide regulated power and    •  UL Listed UL Listed UL Listed—compliance to UL Listed UL Listed high operating efficiencies in a -48 volt system. local codes Performance is assured with Marconi produced transformers, gold printed circuit board      Paralleling and Load Paralleling and Load Paralleling and Load Paralleling and Load Paralleling and Load contacts to resist oxidation and specially rated filter capacitors that last four times longer Sharing Sharing Sharing—for increased load Sharing Sharing than standard capacitors. capacity or rectifier redundancy The units have full metering with ±2% output voltmeter and ammeter for monitoring rectifier operation. Voltmeter reads zero when the rectifier is turned off. They also offer vital      Selective High Voltage Selective High Voltage Selective High Voltage Selective High Voltage Selective High Voltage system alarms with LED indicators for power on, low current, high voltage, low voltage and Shutdown Shutdown Shutdown Shutdown Shutdown—provides greater fuse failure. 800 amp models have one set of contacts for rectifier failure alarms and signals reliability for end cell switch inhibit, high voltage shutdown alarm and low current alarms.      Remote Operation Remote Operation Remote Operation Remote Operation Remote Operation—remote control of float/equalize Application operation The RHM rectifiers are ideal for a wide range of large communications power systems      Current Walk-In Current Walk-In Current Walk-In Current Walk-In Current Walk-In—delivers requirements. smooth start-up and eliminates step loading Accessories      Remote Voltage Sensing Remote Voltage Sensing Remote Voltage Sensing— Remote Voltage Sensing Remote Voltage Sensing External battery eliminator filter: provides precise voltage Reduces noise to less than 32dBrnC with resistive load. The filter is 5.22" (13.26cm) high x control at the battery 15" (38.1cm) deep and is available on panels for 19" (48.26cm), 23" (58.42cm), 27.5" (69.85cm) and 30" (76.2cm) relay rack mounting.  Battery Eliminator Filter  Battery Eliminator Filter  Battery Eliminator Filter—  Battery Eliminator Filter  Battery Eliminator Filter externally mounted Spare fuse and spare parts kits: Recommended spare parts and spare fuse kits.      Phase Shifting Phase Shifting Phase Shifting Phase Shifting Phase Shifting—low line Spare fuse kits — 548502500FK, Spare parts kits — 548502500PK distortion when operating rectifiers in parallel (400 and Additional Information 800 amp models only) For additional specification, engineering and installation      Remote Rectifier On/Off Remote Rectifier On/Off Remote Rectifier On/Off Remote Rectifier On/Off Remote Rectifier On/Off information, specify model number 548403300 or 548502500. Control Control Control Control Control Specifications Input Voltage: D models — taps for 208 (184-220) and 240 (212-254) VAC E models — 480 (424-508) VAC Frequency: 3 phase, 60 (57-63) Hz. For 50 Hz models, consult the factory. Circuit Protection: Refer to rectifier specifications for recom- mended external fusing. LLP 4-13 LLP 4-13 LLP 4-13 LLP 4-13 LLP 4-13 800 amp, -48 VDC Rectifier Specifications (continued) Output Environmental Voltage: Operating Temperature: 0° C to +50° C (+32° F to +122° F) Float — 48.0 to 54.0 VDC Storage Temperature: -40° C to +85° C (-40° F to +185° F) Equalize — 48.0 to 57.0 VDC Humidity: 0-95% relative humidity Current: 800 amps Heat Dissipation: Refer to rectifier specifications for rating Regulation: Steady-state ±Ѕ% from no load to full load over Ventilation Requirements: Ventilation openings must be the specified input voltage, frequency, and ambient temp- unobstructed and air entering the unit should not exceed erature ranges +50° C (+122° F). Floor mounted rectifiers require 3' (.91m) Dynamic Response (on battery): Maximum voltage transient in front and 2' (.61m) of top free air space. will not exceed ±5% of initial steady-state voltage for a step Altitude: Unit is capable of operation from sea level, load change of 250 amps within the range of 5% to 100% of maximum ambient temperature +50° C (+122° F) to 10,000' full load. Recovery to steady-state voltage regulation range (3,048m), maximum ambient temperature +40° C (+104° F). does not exceed 200 ms and all transient behavior disappears within 500 ms. Filtering: M0 odelR0 HM800D5 RHM800E5 Voice band noise — less than 32dBrnC on batteries rated in amp-hours at four times the rated charger current S0 pec. No.50 4840330 54850250 Wide band noise — less than 500 mv peak to peak over the DC Output: frequency range of 10 Hz to 14 MHz when measured on a Volts -48 -48 battery rated in amp-hours at four times the rectifier output Amps 800 800 current Audible Noise: Less than 65dBA at any point 5' (1.52m) AC Input: from any vertical surface of the rectifier Volts 208/240 480 requency 60 Hz 60 Hz Protection Amps* 144.0 62.2 Current Limit: Circuit prevents the further application of E% fficiency9% 2.7 92.9 current to the load if output current exceeds a preset value (adjustable from 90% to 125% of rated load) Heat Dist. Fusing: Refer to rectifier specifications for output fuse ratings (6 Btu/hr) 16 1,25 11,66 High Voltage Shutdown: Circuit causes shutdown if output voltage exceeds a preset (adjustable) value Protection: Input** 200A 100A Thermal: Circuit reduces output current to 66% of rated Output 1000A 1000A load if heat sink temperature reaches +85° C (+185° F) Disconnect: RHM Rectifiers are furnished with an output *Data taken at 52.08 VDC, 208 VAC or 480 VAC, fulll load. (fuse, switch, or bus link) disconnect which provides a **Recommended input fusing, external to rectifier. readily available means for disconnecting the load from the rectifier for maintenance, testing, etc. LLP 4-14 LLP 4-14 LLP 4-14 LLP 4-14 LLP 4-14 800 amp, -48 VDC Rectifier Overall Dimensions D) imensions - inches (cm) Weight - lbs. (kgs. Model AB C Np et Shi RHM800D50 84.25 36 15 1470 1570 (214.00) (91.44) (38.1) (666.79) (712.15) RHM800E50 C C C C C B B B B B A A A A A LLP 4-15 LLP 4-15 LLP 4-15 LLP 4-15 LLP 4-15 ® Lorain is a trademark of Marconi Communications Inc. www www.marconi.com .marconi.com/pow /power er www www www.marconi.com .marconi.com .marconi.com/pow /pow /power er er Marconi Communications Marconi Communications Marconi Communications Marconi Communications Marconi Communications 1122 F Street © 2000 Marconi Communications Inc. Lorain, OH 44052 Printed in the USA. All rights reserved. Any unauthorized 800-800-1280 reproduction or transmission without the prior consent of LLP 4-16 LLP 4-16 LLP 4-16 LLP 4-16 LLP 4-16 Fax: 440-246-4876 Marconi Communications Inc. is prohibited.