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"F3", AC Phase Failure Alarm: This module for 3Ø Input is activated when the supply voltage on any phase drops to zero or below a selected level; it is activated also when the phases are connected out of sequence.
"F", AC Failure Alarm: This relay for 1Ø Input is de-energized when there is an interruption in AC supply to the Charger.
"B", Low DC or Battery Voltage Alarm: This module is activated when the voltage on the DC Bus drops below a selected level; it is adjusted to a level that is significant to the Battery, the Bus, or some other Load. Several modules can be connected in order to monitor more than one level.
"H", High DC or Battery Voltage Alarm: This module is activated when the voltage on the DC Bus rises above a selected level; it is adjusted to a level that is significant to the Battery, the Bus, or some other Load. Several modules can be connected in order to monitor more than one level.
"R", DC Failure Alarm: This module is activated when the Voltage and Current on the DC Bus are simultaneously below their respective selected levels; the Voltage level is adjusted to a value that is significant to the Battery, the Bus, or some other Load, while the Current level is adjusted to a value that takes into account the sum of the minimum current demands on the DC Bus.
"G", Ground Fault Alarm: This module is activated when either of the DC Bus polarities leaks to Ground on a "Floating Ground" system; the polarity of the Ground is indicated. The level of Ground current required to activate the module is adjustable to between approximately 1 and 10 mA.
"C", Equalize Cycle Timer: This module selects between the "Equalize" and "Float" Charger Output modes and is activated on a selected cycle of 0, 7, or 30 days, or by depressing a "START" or "STOP" push-button; once Equalize is selected or "started", a period timer runs for a selected lenghth of time that ranges from 3.5 to 13 hours. When the selected Equalize time elapses, the Charger Output reverts to Float and awaits the next cycle. The Equalize mode can be cancelled at any time by depressing a "STOP" push-button.
"J", Equalize Timer: This module selects the "Equalize" Charger Output mode and is activated by depressing a "START" push-button; once Equalize is selected or "started", a period timer runs for a selected lenghth of time that ranges up to 24 hours. When the selected Equalize time elapses, the Charger Output reverts to Float and awaits the next activating signal. The Equalize mode can be cancelled at any time by depressing a "STOP" pushbutton.
"U", Automatic Equalize, (I/U): This module selects the "Equalize" Charger Output mode; "Equalize" is activated when the voltage on the DC Bus drops below a selected level, and is terminated when the voltage on the DC Bus rises above a second selected level; if the sum of the Load and Battery demands is high, the Charger Output current is limited to a selected maximum until the battery voltage can rise sufficiently for the Output current to start decreasing. This "recharge" system is often refered to as the "I/U" method.
"O", Manual Overide of Charge Mode: This circuit enables an operator to select between "AUTO", "EQUALIZE" or "FLOAT" by positionning a three position toggle switch. In the "AUTO" position an "I/U" system controls the charge mode; in the "EQUALIZE" position the mode is continuous "EQUALIZE"; In the "FLOAT" position the mode is continuous "FLOAT".
"Y", AC/DC Surge Voltage Suppressors: These devices clamp Transient Voltage Surges to an acceptable level for a short time in order to give a site's other levels of protection systems time to act. They are normally positionned at the input and output of the charger's rectifier.
"T", Audible Alarm Signal: This feature emits a local audible signal to warn personnel on site that an alarm condition exists. The signal can be silenced without affecting the alarm circuit by moving the "SILENCE/NORMAL" toggle to the "SILENCE" position; when the alarm condition disappears, the audible signal will "ring-back" as a reminder that the switch must be returned to the "NORMAL" position.
BACK
"L", Inductor/Capacitor Filter:
This circuit reduces or smooths the Output ripple of the Charger to a level
acceptable to sensitive Loads. Filters for various levels of ripple are
available on application; the most frequently requested levels are listed in the
RFQ form.
"HV" High Voltage Shut-Down: This feature opens the charger's Input Breaker thereby shutting down the charger in order to prevent Battery overcharging if the Output Voltage rises to a predetermined maximum level. The Input breaker must be manually closed once the cause of the High Voltage has been corrected.
"LV" Low Voltage Disconnect: This feature opens the Load circuit and prevents the Battery from discharging below a predetermined discharged value. The feature comprises a DC voltage monitor with seperately adjustable Low and Normal voltage values and a Load Contactor controled by the voltage monitor. The operation is automatic but has a manual override switch. The current carrying capacity (Amps) of the Contactor must be selected at time of quotation.
C.E.M.F. Cell (Voltage Droppers): This feature lowers the voltage delivered to a sensitive Load by inserting Diodes in series with the circuit until the voltage drops to an acceptable level; the Diodes are then removed.
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