3.3.15 Over Voltage Shutdown
The over voltage protection feature electronically shuts down the Module when a high voltage con
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dition on the output of the Module is identified. The minor alarm indicator Module fail indicator, & re
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lays will turn on, the message O/P HIGH VOLTAGE SHUTDOWN,&MODULE FAIL will be dis
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played on the LCD panel. The level of the high voltage shutdown condition is set by the setting
found in the submenu ADJUSTMENTS. This feature provides protection to the load from a over
voltage condition from the power source. The over voltage shutdown feature of the RSM is selective
and operates at 5% higher voltage in a less than 5% load condition. This provides the ability to iso
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late and shutdown a malfunctioning unit amongst a group of units operating in parallel. The level
cannot be adjusted to a voltage less than 0 volts to 0.5 volts above the highest of the float or equal
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ize voltage settings. The level is protected by fail safe circuitry in the unlikely event of micro-
controller failure.
3.3.16 Remote Equalize
When the external positive or negative polarity (with respect to the remote common termination)
D.C. signal is applied to the remote EQUALIZE input of the shelf all modules will enter the EQUAL
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IZE mode. The response to the external signal will be the same as if the front panel Float/Equal
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ize mode selection button was depressed. Upon removal of this signal the Module will automatically
go into FLOAT mode, even though it may have been in TEST mode prior to signal application. Re
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mote equalize via this hardware method cannot be disabled locally. The message REMOTE
EQUALIZE will be displayed on the LCD display.
3.3.17 Remote Shutdown
When a signal is applied, the unit “electronically” shuts down (breakers are not tripped). To the out-
side world the units appears as if the output breaker was turned off. All the appropriate trouble
alarms would be extended, such as Module fail. Removal of the signal will return the Module to the
condition prior to signal application. The feature requires the same type of input that is used for re-
mote EQUALIZE. Remote shutdown via this hardware method cannot be disabled locally. The con-
trol can be used to reset the unit after a High o/p shutdown condition. The message REMOTE
SHUTDOWN will be displayed on the LCD display.
3.3.18 Automatic High Voltage Shutdown Restart
After an over voltage shutdown condition has occurred the unit will attempt to restart three times at
five second intervals. The number of attempts is stored in an attempts counter. If the condition
clears for at least one minute the attempts counter is reset. If the module fails the third attempt the
unit will remain shutdown and require the input breaker to be turned “off” then “on” again to clear
the condition. The unit can be reset remotely by toggling the remote shutdown control signal.
3.3.19 Start Delay
The units are equipped with a delay timer in order to stagger start a series of modules to prevent
excessive loading of the standby generators in remote sites upon start up. The timer delays the
A.C. start of the Module depending on the values programmed for start delay. Delay times from 0 -
250 seconds (in 5 second increments) are available. Even in the zero position a one second delay
is introduced to allow for charging of the capacitors prior to initiation of the soft start. Delay will be
initiated upon application of A.C.. At the end of the delay period soft start is initiated and the Module
goes into FLOAT mode. The duration for the delay is set by the setting found in the submenu AD
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JUSTMENTS. When active the message DELAY START and the time remaining will be displayed
on the LCD panel.
010-030-C0 Rev E Page 10 of 42 ARGUS TECHNOLOGIES
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