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SCR Training at the Zeefax Academy

The table below shows the detailed content and course schedule for the main SCR training course. In this course, we have tried to provide a broad spectrum of technical and operational information relating to the use and maintenance of a typical SCR system.

The course includes detailed discussion and functional analysis of the various electronic circuits, and therefore we strongly recommend that course delegates have some prior knowledge of electronics and electrical engineering.

The course is ideal for rig electrical maintenance and support engineers, who also have some prior knowledge of the workings of the installed SCR system, although it is also of great value as an introduction for those engineers who may be new to SCR systems.

Moving forward, it is hoped that the course will provide clarity and insight, enabling the rig engineers to better support and maintain their systems, thereby improving the reliability and ROI for the organisation.


Day 1


,Basics of Rectification

,,Diode Operation

,,Single and Three phase circuits

,,SCR Rectification Principals

,,Single and Three Phase SCR Bridge

,,Testing a Diode

,,Testing an SCR

,,SCR Failure Modes

,,SCR Protection (snubbers)

,,Anatomy of an SCR Stack

,,Basic Electronics

,DC Motor Control

,,The DC Module – Electronics Features and Functions

,,DC Motors

,,Auxiliary Circuits

,,            Voltage and Current Feedback Circuits

,,            Fault Protection Circuits

,,            Control Loops

Day 2

,AC Generator Control

,,AC Module – Electronics Features and Functions

,,Exciter Control

,,Actuator Control


,,Oscilloscope Training,

,,Module testing using O’Scope


Day 3

,SCR System Logic


,,SCR Control Circuits

,,Logic Indicators

,,Purge Cycles and Remote Auxiliaries


,,Passive Field Supply

,,Active Field Supply

,,Mud Pump Active Load Sharing


,,Changing a Thyristor Puck

,,Using a fault finding simulator


Day 4

,SCR System Circuits

,,Power Limit

,,Driller’s Console

,,Sprocket Slip

,,AC Ground Fault Detection

,,DC Ground Fault Detection

,,Dynamic Braking

,,Regenerative Braking

,,Surge Suppression

,,Schematic Drawings

,Q&A Session


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