Siemens 8DA10 User Manual

Medium-Voltage Switchgear
Type 8DA, Extendable Fixed-Mounted Circuit-Breaker Switchgear up to 40.5 kV
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OPERATING
INSTRUCTIONS
PART 1/2
Description, Operation
and Servicing
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Siemens 8DA10 Specifications

General

Type	Gas-insulated switchgear
Frequency	50 Hz / 60 Hz
Insulation medium	SF6
Installation	Indoor
Modular design	Yes
Maintenance	Low maintenance

Summary

Safety Instructions and Personnel Requirements

Due Application and Safety Rules

Specifies correct usage, conditions for safe operation, and essential safety rules to prevent hazards.

Qualified Personnel Requirements

Outlines the necessary qualifications and training for personnel handling the equipment.

Circuit-breaker Panel Components

Panel Function, Frame, and Compartments

Switchpanel Pole and Assembly

Circuit-breaker and Operating Mechanism

Circuit-breaker Design and Mechanical Interlocks

Operating Mechanism Box Function and Design

Three-Position Switch Functionality

Three-Position Switch Function and Control Elements

Switch Positions and Indications

Gas Compartments and Technical Data

Technical Data Summary

Summarizes rated voltages, currents, protection ratings, and SF6 gas properties.

Circuit-breaker Operation Procedures

Control Board Overview and Manual Operations

Identifies controls and details manual closing, opening, and test operations.

Test Operations and Spring Charging

Three-Position Switch Operation Procedures

Control Elements and Manual Disconnector Operations

Manual Earthing Switch Operations

Details manual earthing and de-earthing procedures for the three-position switch.

Emergency and Feeder Operations

Emergency Operation of Three-Position Switch

Guides on manual operation using the emergency lever when motor power fails.

Feeder Earthing and De-earthing Procedures

Outlines the steps for safely earthing and de-earthing feeders.

Busbar Make-Proof Earthing Switch

Control Elements and Operation

Identifies operating controls and provides procedures for closing and opening the switch.

Interlocks and Switching Safety

Interlocks for Switching Operations

Safe Isolation and Terminal Connections Verification

Details procedures for verifying safe isolation and correct terminal-phase connections.

Switching Operations Overview

Circuit-breaker Panel and Bus Sectionaliser Switching

Top-mounted Busbar Sectionaliser and Voltage Transformer Switching

Servicing and Maintenance

Switchgear Maintenance and Safety Instructions

Inspection Schedule and Procedures

Cable Testing and Accessories