Change-Over Switch Function Introduction

Function Category	Description	Key Feature
Power Source Switching	Transfers electrical load between two separate power sources (e.g., Main Grid ↔ Generator, Grid A ↔ Grid B).	Ensures continuous power supply during source failure or maintenance.
Manual Operation	Allows operator to manually select the active power source via a mechanical lever/knob.	Provides direct control without external control circuits.
Automatic Operation	Switches sources automatically upon signal from a controller (e.g., grid failure detection).	Minimizes downtime; requires control logic integration.
Electrical Isolation	Physically disconnects the inactive source from the load via break-before-make contacts.	Prevents backfeeding, ensuring safety & compliance.
Load Protection	Interrupts fault currents (short-circuit/overload) when integrated with protective devices.	Safeguards connected equipment (compliance: IEC 60947-6-1).
Status Indication	Visual flags/LEDs show active source position (e.g., "I", "0", "II").	Enables quick operational verification.
Emergency Power Control	Prioritizes backup source (e.g., generator) during primary source failure.	Critical for hospitals/data centers.

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Change-over swtich

SF series DIN-rail installation micro change-over switch is a kind of switch apparatus applicabl to
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Product features of change-over switch

The DIN-rail installation micro change-over switch realizes the changeover of O, l and Il
pasitions directly with manual handle. The turning slot of the internal handle and the
sliding position of the spindle are all coated with high grade lubricant to reduce
mechanical wear. The dynamic and static contact adopt the reasonable contact method
with good conductivity and stability. The modular and standard guide installation
structure is particularly suitable for the matching circuit of terminalcombination apparatus. Specification and Feature
■ON and OFF indicator
■Conform to standard IEC60947-3
■The position ON/OFF handle correspond to the state of the contacts
■Fast installation and removal

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Change-Over Switch Function Introduction

Change-over swtich

Product features of change-over switch

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