Marconi LORAIN RHM800E50, Manual

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RELTEC
Section 4387
Power Products
Issue , August 4.1997
MODEL RECTIFIER
SPEC. NO. 548502500
CONTENTS. . . . . . . . . . . . . . . . . . . .
PAGE
CONTENTS . . . . . . . . . . . . . . . . PAGE
1.
2.
3.
4.
5.
6.
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
TEST APPARATUS . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . 2
Electrical Connections. . . . . . . . . . . . . . . . . . .
Alarm and Control Connections. . . . . . . . . . . .
Initial Startup and Checkout. . . . . . . . . . . . . . . 4
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Starting and Stopping . . . . . . . . . . . . . . . . . . . 7
Controls and Indicators . . . . . . . . . . . . . . . . . . 7
Metering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Float Charging . . . . . . . . . . . . . . . . . . . . . . . . .
8
Equalize Charging . . . . . . . . . . . . . . . . . . . . . . 8
Automatic Shutdown . . . . . . . . . . . . . 8
Ripple Regulator Circuit. . . . . . . . . . . . . . . . . . 9
Batteryless Operation Option). . . . . . . . . .
9
Cooling Fans and Temperature Sensors . . . . . 9
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
Circuit Cards . . . . . . . . . . . . . . . . . . . . . . . . . .
9
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . 9
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Float Voltage Adjustment . . . . . . . . . . . . . . . . . 10
Equalize Voltage Adjustment . . . . . . . . . . . . . . 11
Current Limit Adjustment . . . . . . . . . . . . . . . . . 12
Low Voltage Alarm Adjustment . . . . . . . . . . . . 12
High Voltage Alarm Adjustment. . . . . . . . . . . .
13
Low Current Adjustment . . . . . . . . . . . . 13
Overvoltage Shutdown Adjustment . . . . . . . . . 14
Load Sharing Adjustment. . . . . . . . . . . . . . . . . 15
Ripple Regulator Adjustment. . . . . . . . . . . . . . 18
CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . 16
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
AC Input Circuit . . . . . . . . . . . . . . . . . . . . . . . . 16
Power Supply Assembly . . . . . . . . . . 17
Power Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Voltage and Current Regulation Circuitry. . . . . 17
Voltage Reference and Error Detection . . . . . . 17
Current Sensing and Current Regulation. . . . . 18
Pulse Generation and Phase
Control Circuits. . . . . . . . . . . . . . . . . . . . . . . . . 18
Current Walk-in Circuit. . . . . . . . . . . . . . . . . . . 21
Negative Load Sharing
. . . . . . . . . . . . . 21
Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . 22
Ripple Regulator Circuit Card Al 1. . . . . . . . . . 23
Fuse Alarm Circuit . . . . . . . . . . . . . . . . . . . . . . 23
Temperature Sensing Circuit . . . . . . . . . . . . . . 23
7.
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . 24
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Isolation Chart Use . . . . . . . . . . . . . . . . . 24
Testing Precautions . . . . . . . . . . . . . . . . . . . . . 24
Repair and Replacement Information. . . . . . . . 24
Test Procedures. . . . . . . . . . . . . . . . . . . . . . . . 31
8. MODEL DATA . . . . . . . . . . . . . . . . . . . . . . . . . 37
APPENDIX
1. DESCRIPTION
General
1.1 These Rectifiers operate from Hz three
phase to maintain a battery in a fully charged condi-
tion while powering a The Model Rec-
tifier can be operated from VAC input power.
1.2 Float This rectifier provides constant
output voltage; therefore, output current remains equal to
load current as
as load current does not exceed a
predetermined. adjustable value. This mode of operation
is known as float charging. Since, in normal operation,
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