Understanding Medium Voltage Switchgear Drawings – Schematics

Hi,

Medium Voltage drawing is basic drawing for start understanding Schematics.

In this training I have covered the following topics.

• Symbols Used in drawings
• Component List
• Relay & Metering Single Line Diagram
• AC Loop Circuit
• DC loop Circuit
• Current & Voltage Transformers
• Concept of Short time and continuous ratings
• CT & VT Accuracy Class
• CT & VT Capacity
• Control Voltage Loop
• Trip Coil 1 Circuit
• Control Coil Circuit
• Trip Coil 2 Circuit
• Close Block
• Lockout Relay
• DC Supervision Relay at End of Loop
• Normally Open & Close Contact
• Concept of Anticipating
• Opening and closing coil saving feature
• Signalling circuit
• Local & Remote Selection
• Tripping from Remote & Local
• Spare contacts arrangements
• Under Voltage Trip Feature of the CB trolley
• Incoming Feeder Drawing
• Outgoing Feeder Drawing
• Heating & Lighting Circuit
• Circuit Breaker Operations from Local & Remote
• Binary Input & Outputs
• Watch Dog Contact
• CT Polarity

I hope that this will really increased your knowledge & improve your skills.

Best Regards

Muhammad Kashif