1.0 OVERVIEW
The ED2.0 electronic control board is comprised of a Power Supply Recharge Unit, Control
Unit, and FET Switching circuit which connects the Storage Unit Capacitors to the Magnetic
Actuator coils.
The power supply recharge circuitry adapts whatever input voltage, within the specified range
(Section 2.0), is supplied to maintain an 80 V charge voltage across the capacitors. The
Control Unit monitors binary inputs and outputs, hardware and software configurations,
position sensors, capacitor charge, and switches the FET circuit to connect the capacitor
voltage to the Magnetic Actuator coils following an open or close command.
The Capacitor Storage Unit consists of two 0.1 microfarad Aluminum Electrolytic capacitors
connected in parallel to provide a total capacitance of 0.2 microfarads. The energy stored is
approximately 640 Joules. When called to energize the Magnetic Actuator coils, the
capacitors will deliver a peak current of approximately 35 A and a pulse width of 45
milliseconds for opening operations and 60 milliseconds for closing operations.
The ED2.0 board also provides access, through KM1003 for external charging and
discharging of the Storage Unit capacitors. A 10 kOhm capacitor discharge resistor is
mounted on the circuit board. Discharging is done by jumpering KM1003 pins 5 and 6. 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. 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 5 and 6. Approximately 40 seconds is needed to discharge the capacitors using the 10
ohm external resistor.
The MTTF for the ED2.0 Control Board (Mean Time To Failure) is 30 years.
The ED2.0, with external circuitry, system Block Diagram is given in Illustration 1 below.
ILLUSTRATION 1 – ELECTRICAL SYSTEM BLOCK DIAGRAM
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Summary of Contents for R-MAG Series
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Page 15: ...Page 11 Figure 3 Interrupter Assembly 1200 A 38 929M 15A 10 15 02 1 11 PM Page 15 ...
Page 16: ...Page 12 Figure 4 Interrupter Assembly 2000 A 38 929M 15A 10 15 02 1 11 PM Page 16 ...
Page 17: ...Page 13 Figure 5 Interrupter Assembly 3000 A 38 929M 15A 10 15 02 1 11 PM Page 17 ...
Page 20: ...Figure 8 Trip Handle Page 16 38 929M 15A 10 15 02 1 11 PM Page 20 ...
Page 21: ...Figure 9 High Voltage Cabinet Layout Page 17 38 929M 15A 10 15 02 1 11 PM Page 21 ...
Page 22: ...Figure 10 Typical Schematic Diagram Page 18 38 929M 15A 10 15 02 1 11 PM Page 22 ...
Page 23: ...Figure 11 Typical Connecting Diagram Page 19 38 929M 15A 10 15 02 1 11 PM Page 23 ...
Page 24: ...Figure 12 Typical Outline 1200 A Page 20 38 929M 15A 10 15 02 1 11 PM Page 24 ...
Page 25: ...Figure 13 Typical Outline 2000 3000 A Page 21 38 929M 15A 10 15 02 1 11 PM Page 25 ...
Page 30: ...Page 26 38 929M 15A 10 15 02 1 11 PM Page 30 ...
Page 44: ...Page 40 ILLUSTRATION 8 READY LED OFF 38 929M 15A 10 15 02 1 11 PM Page 44 ...
Page 45: ...Page 41 ILLUSTRATION 9 CB WILL EITHER NOT OPEN OR CLOSE 38 929M 15A 10 15 02 1 11 PM Page 45 ...