Application Guide

SAG582140000 System Application Guide
Issue AW, June 3, 2014 Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B)
Page 110 of 134
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Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
Note: If the current limit setting is greater than the maximum allowable output
current for the existing room ambient temperature, the current limit setting
will automatically be reduced. Refer to the following figure. Local and external
indications will be given.
Warning: The Rectifier is rated for continuous operation at full output current up to
+40°C (+104°F). Operation between +40°C and +80°C (+104°F and +176°F)
is considered abnormal and should be used on a temporary
1
basis only.
1
Temporary Operation at Abnormal Temperature: Temporary operation
refers to a period of not more than eight consecutive hours per day, and a
total of not more than 15 days in a year. (This refers to a total of 120 hours
in any given year, but no more than 15 occurrences in that one year
period.)
Typical Thermal Current Limit Curve
(D) High Temperature Inhibit: A thermal switch present in each Rectifier continuously
monitors the temperature of the power conversion circuit. If the temperature of the power
conversion circuitry exceeds the design limits a circuit will inhibit the Rectifier. Manual
restart is then required.
(E) High Voltage Shutdown
(1) Internal: If Rectifier output voltage exceeds an adjustable preset value and is
delivering more than 10% of its rated current, the Rectifier shuts down.
After approximately 3 seconds, the Rectifier automatically restarts. If Rectifier output
voltage again exceeds the high voltage shutdown value within 5 minutes, the Rectifier
shuts down and locks out. Manual restart is then required. If the Rectifier does not
experience a high voltage condition within the 5 minute time period, the restart circuit is
reset.
If two or more Rectifiers are installed in the Power/Distribution Bay, or if the
Power/Distribution Bay is paralleled with other Power/Distribution Bays, only the
Rectifier causing the high voltage condition shuts down.
The high voltage shutdown point can be checked and/or adjusted without removing a
Rectifier. One adjustment changes the setting of all Rectifiers.
Adjustable from 48.00 to 59.50 volts DC. Factory set at 57.50 volts, unless otherwise
specified.
(2) Remote: See Paragraph 4.1.13 (B).
AMBIENT TEMPERATURE
50 70
0
20
40
60
0
25 5545
NORMAL
CONTINUOUS
OPERATION
ABNORMAL
TEMPORARY
OPERATION
65 80
80
100
120
77 86 122 131 149 158 17632
°C
°F
PCU THERMAL CURRENT LIMIT CURVE
(TYPICAL)
30 35 40 60 75
95 113104 140 167
140
160
180
200
220
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