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The ED2.0 board provides access through KM1003 for discharging the Storage Unit capacitors.
Make sure the ED2.0 Control Board Power is removed before attempting to discharge the capac-
itors.
PROCEDURE:
A 10 kOhm capacitor discharge resistor is mounted on the circuit board. Discharging is done by
jumpering KM1003 pins 4 and 5. The time constant is 33 minutes. An external resistor can be
used for quicker discharging, but the discharge current should be restricted to 10 A maximum.
This means that no lower than 10 Ohms external resistance should be used to perform capacitor
discharging. In this case an external 10 Ohm, 25 watt resistor can be connected to KM1003 Pins
4 and 6. Approximately 30 seconds is needed to discharge the capacitors using the 10 Ohm
external resistor.
6.2 Capacitor Life
The 0.1 Farad Electrolytic capacitors are designed to be operated in the temperature range of -
40°F to 185°F. The End of Life corresponds to the point at which the capacitance decreases by
20% or more.
It is recommended that replacement of capacitors be performed every 15 years for tropical cli-
mates and 20 years for an average yearly temperature (in the outdoor breaker enclosure) of less
than 122°F.
6.3 Breaker Ready / Not Ready Binary Output Contacts and Ready Light Status
CIRCUIT BREAKER POSITION
CONDITION CLOSE OPEN
Capacitor Energy sufficient Ready LED: on Ready LED: on
For O-CO operations Ready contact: closed Ready contact: closed
Not ready contact: opened Not ready contact: opened
Capacitor Energy sufficient for Ready LED: blinking Ready LED: blinking
CO operations Ready contact: closed Ready contact: closed
Not ready contact: opened Not ready contact: opened
Capacitor Energy sufficient for Ready LED: blinking Ready LED: off
O operations Ready contact: closed Ready contact: opened
Not ready contact: opened Not ready contact: closed
Capacitor Energy insufficient for Ready LED: off Ready LED: off
any operations Ready contact: opened Ready contact: opened
Not ready contact: closed Not ready contact: closed
Close Coil continuity not right Ready LED: blinking Ready LED: off
Ready contact: closed Ready contact: opened
Not ready contact: opened Not ready contact: closed
Open Coil continuity not right Ready LED: off Ready LED: off
Ready contact: opened Ready contact: opened
Not ready contact: closed Not ready contact: closed
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