ABB eVM1, Installation And Service Instructions Manual

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6. Structure
6.1. Drive structure
The drive is of the magnetic type and basically consists of the magnetic actuator (8) (fig. 4), the
control module (10), the current sensors (3), the capacitor/s (2) and the kinematics which transmit
the movement to the circuit-breaker poles.
The actuator (8) acts on the circuit-breaker poles by means of special kinematics. The capacitor/
s (2) provides/provide the energy required for the operation.
The mechanical operating positions of the circuit-breaker are detected by two due sensors (14).
The basic version of the circuit-breaker is fitted with the following controls and instruments:
• coupling for manual emergency operation (9)
• mechanical state indicator (6)
• mechanical operation counter (5)
• control panel (7) with opening and closing pushbuttons.
6.1.1. Structure of the control module
The control module (10) of the circuit-breaker consists of:
• a microprocessor
• opto-electrical input couplers
• output relay
• electronic power system for controlling the actuator coils.
1 Pole: vacuum interrupter
embedded in epoxy resin
2 Capacitor
3 Current sensor (Rogowski
coil)
4 Truck of withdrawable circuit-
breaker
5 Operation counter
6 Mechanical Open/Closed
signalling device
7 Control panel
8 Magnetic drive
9 Coupling for emergency
manual operating lever
10 Protection and control unit
11 Binary inputs/outputs
12 Communication
13 Socket for auxiliary circuits
14 Position Open/Closed
sensors
Fig. 4