ABB R-MAG 38kV 1250/2000A - Apx Figure 1 Electrical System Block Diagram; Overview

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1. OVERVIEW
The actuator 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
(see
CONTROL BOARDS AVAILABLE/MAGNETIC ACTUATOR COIL ENERGIZING CAPACITOR),
is supplied to maintain an 80 V charge voltage across the capacitors. The Control Unit monitors
binary inputs and outputs, hardware and software configurations, auxiliary contacts, 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 four 0.1 farad aluminum electrolytic capacitors
connected in parallel to provide a total capacitance of 0.4 farads. When called to energize the
Magnetic Actuator coils, the capacitors will deliver a peak current of up to 100A and a pulse
width of 45 milliseconds for opening operations and 60 milliseconds for closing operations.
The actuator control board system Block Diagram is given in
Apx Figure 1 Electrical System Block Diagram
Apx Figure 1 Electrical System Block Diagram