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Product Data Sheet
MODULAR SWITCHED MODE RECTIFIER
RM4850
DESCRIPTION
The RM4850 Modular Switch-Mode Rectifier is one of C&D
Technologies’ family of rectifiers that may be used in modular
power plants. This high power unit will function in parallel
with any rectifier with similar current sharing capacities. This
versatile and efficient rectifier is ideal for use in advanced
telecommunications applications. Its small size allows the
user to plan economically for system expansion at minimum
cost and makes it ideal for use in fiber optic, microwave
and other applications where space is at a premium.
50 AMP
FEATURES
• SWITCHED MODE
• >.99 PFC
• >90% EFFICIENCY
• AUTOMATIC LOAD SHARING
• HOT-SWAP CAPABLE
• COMPACT SIZE
• SHELF MOUNTED
• SOFT START TURN-ON
• ESD TO 20,000 VOLTS
• -40°C TO 65°C FULL OPERATION WITHOUT DERATING
• REMOTE EMERGENCY POWER DISCONNECT !
• TELECOM BULK POWER RATED!
•
BELLCORE COMPLIANT
• INFINITE, FULL CURRENT SHORT CIRCUIT
CAPABLE!
•
BUILT-IN AC & DC DISCONNECTS
• FRONT PANEL METER
• BATTERY OR BATTERYLESS OPERATION
•
INTELLIGENT HIGH VOLTAGE SHUTDOWN
• GUARANTEED NO SINGLE COMPONENT FAILURE
CAN LEAD TO OUTPUT HIGH VOLTAGE!
•
GUARANTEED SAFE OPERATION TO 300 VAC
• ENVIRONMENTALLY HARDENED!
• THD <5%
RM4850 4/98 REV A
Power Electronics Division, United States
3400 E Britannia Drive, Tucson, Arizona 85706
Phone: 800.547.2537 Fax: 520.770.9369
AGENCY APPROVALS
Internet: http://www.cdpowerelectronics.com
Power Electronics Division, Europe
C&D Technologies (Power Electronics) Ltd.
132 Shannon Industrial Estate, Shannon, Co. Clare, Ireland
Tel: +353.61.474.133 Fax:+353.61.474.141
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Input Specifications
Parameter Conditions Min Typ Max Units
Operating Range 45 - 65 Hz, single phase, no taps required 176 264 VAC
Current Adjustable 0 50 A
Efficiency >90 %
Power Factor Correction (PFC) >.99
MEASUREMENTS OF RM4850
Module
Weight 25 lbs.
Height 7U (12.25”)
Depth 15.25”
Width 5”
Shelf* Weight 18 lbs.
Height 7U (12.25”)
Depth 15.25” maximum
Width 23” rack mount
* These measurements are specifically for the 200A Power Shelf for up to 4 quantity RM4850
Please contact the factory for other shelf and power plant options.
GENERAL FEATURES
Hot Swappable Modules
These shelf-mounted modules are easy and safe to install
or remove while system is operational without affecting
the overall system’s performance.
Parallel Operation and Automatic Load Sharing
Forced or passive load sharing is available between
modules of the same operating voltages in parallel
applications.
Alarm Outputs
Rectifier Fail Alarm (RFA)
Equalize Occurring (EQO)
High Voltage Occurring (HVO)
Temporary Restraint Occurring (TRO)
Thermal Shutdown Occurring (THSD)
Open Sense Lead Has Occurred (OS)
Low Current Alarm (LCA)
AC Power Has Failed Alarm (ACF)
Rectifier Fan Has Failed Alarm (FF)
DC Breaker Is Open Alarm (DCBKR)
AC Breaker Is Open Alarm (ACBKR)
Current Limit
The Current Limit is adjustable between 0A to 50A. Upon
exceeding this limit, the rectifier automatically reduces
output voltage.
Safety
UL/CUL Recognized: UL 1950/CSA 950.
File Number: E181908
Control Inputs
High Voltage Shutdown (HVSD)
Restart (RS)
Equalize (EQ)
Temporary Release (TR)
Emergency Shutdown (EMSD)
All control inputs
are initiated with
a ground closure
}
24VAC voltage
}
reference to
ground
Note: All alarms are “Fo r m A” relay type contacts
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RM4850 4/98 REV A
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Output Specifications
Parameter Conditions Min Typ Max Units
Voltage Adjustment Range
float voltage 48 60 VDC
equalize voltage 48 60 VDC
Regulation 0-100% load within
specified input voltage and frequency range ± 0.5 %
Load Current within a 10 - 100% rating ±10 %
Hold-Up Time nominal AC line >16 mS
Filtering
Voice band <32 dBrnc
Wide band noise @20 MHz <250 mV p-p
ENVIRONMENTAL
Temperature
Operating -40 +65 °C
-40 149 °F
Storage -50 +85 °C
-58 185 °F
Humidity non-condensing 0 95 %
Altitude 0 7000 ft.
0 2133 m
Heat Dissipation @54V 1025 Btu/hr
Audible Noise 5 ft. from any vertical surface <55 dBa
PROTECTION, ALARM AND CONTROL SYSTEMS
Rectifier Failure Alarm (RFA)
Problems occurring because of an unacceptable relationship between the output power and load conditions will
cause a Rectifier Failure Alarm (RFA). Conditions which
may lead to an RFA include:
Low Current - Output current has decreased to below
5% of its rated value.
Unit Shutdown - Any shutdown occurrence due to
overvoltage, external shutdown command, unacceptable
ambient temperature conditions or out of bounds AC input
voltage.
Fan Malfunction - The fan has stopped operating or is
not providing the airflow needed to cool the unit.
Over Temperature - The ambient temperature has
exceeded 65°C.
High Voltage Shutdown (HVSD)
The unit’s high voltage limit is adjustable up to 60VDC.
Shutdown occurs while voltage is high and the rectifier is
delivering greater than 10% rated current. When internal
shutdown occurs, the unit may be restarted by a local
switch or by a remote signal.
Surge Protection
The unit will withstand lightning and input surges of
6000V/3000A.
Under Voltage Protection
When input voltage is below 176 VAC, the rectifier’s
operation is automatically inhibited.
RM4850 4/98 REV A
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Mechanical
All measurements are in inches
Standard Options are shown, consult factory for other available options.
The information provided herein is believed to be reliable; however, C&D Technologies assumes no responsibility for inaccuracies or omissions. C&D Technologies assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without
notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. C&D Technologies does not authorize or warrant any C&D
Technologies product for use in life support devices/systems or in aircraft control applications.
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RM4850 4/98 REV A
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