ARE Series Chargers
RS-759, Rev. 11
5-4
5.6
HIGH VOLTAGE ALARM WITH ADJUSTABLE TIME DELAY
5.6.1
High Voltage Alarm Connection Diagram
This alarm has an adjustable time delay from approximately 1 to 180 seconds. One set of form C contacts are
available for remote indication. An optional local alarm light can be provided.
LEGEND:
NOTES:
HVA
HIGH VOLTAGE ALARM BOARD
1. ALL WIRING IS SIZE #18.
HVPL
HIGH VOLTAGE PILOT LIGHT
2. TS3 IS ON ACCESSORY PANEL.
LVPL
LOW VOLTAGE PILOT LIGHT
3. PILOT LIGHTS ARE ON INSTRUMENT PANEL.
TS-3
TERMINAL BLOCK SENSING
4. TS4 IS LOCATED ON BOTTOM OF CABINET.
TS-4
TERMINAL BLOCK CUSTOMER
CONNECTIONS
5.6.2
Connections
The high voltage form C contacts are terminated at terminal strip TS4, points 1, 2, & 3.
5.6.3
Operation
Relay is energized under normal conditions. When high voltage conditions occurs relay drops out after desired
time delay.
5.6.4
Adjustment Procedure
1.
Connect digital voltmeter, 20 VDC scale to + TP & - TP where indicated.
2.
Energize power supply and adjust output voltage to desired alarm voltage.
3.
Adjust pot R6 clockwise to raise operating point, counterclockwise to lower operating point. Slowly
adjust R6 clockwise to cause voltmeter to change abruptly from approximately 6.8V to 0V (high to
low); if voltmeter already reads low, adjust R6 counterclockwise to obtain high condition.
4.
Check setting by reducing power supply voltage until relay resets then slowly raise voltage until
voltmeter reads low. Note that trip is a desired voltage level readjust if necessary.
5.
Set pot R14 to desired time delay. Note: Scale on board is approximate time.
5.6.5
Specifications
Adjustment Range
±20% to 2.2 volts per cell
Contact Rating
Maximum current 2A, Maximum voltage 220V AC/DC,
Maximum switching power 60W/100VA
Operating Temperature
0 to 65 C
Temperature Coefficient
.02% per C
Differential – Operate to Restore
2% typical
Factory settings – Low Voltage
2.08 volts per cell
Factory settings – High Voltage
2.41 volts per cell
Current Drain: up to 48V System
28MA Relay Deenergized
130 & Higher System
13MA Relay Deenergized
