Arc-Killer SV-25 - DF-2+ Range
Arc-Killer SV-25 – DF-2+ Range
Overview
1. General Overview
2. Drive Mechanism
3. Cubicle Integration
Arc-Killer SV-25 – DF-2+ Range
Overview
1. General Overview
2. Drive Mechanism
3. Cubicle Integration
Arc-Killer SV-25 – DF-2+ Range
General Overview
Arc-Killer SV-25 provides additional safety
by minimizing the effects of an internal arc.
 Less energy released
 Fewer architectural/structural demands
 Unit is reusable after an arc
Arc-Killer SV-25 – DF-2+ Range
SV-25 Basic Principles
Ionisation
Ignition
Pressure build
fault occurrence
Metal Short Circuit
SV-25 triggered
ms
0
18
Arc-Killer SV-25 – DF-2+ Range
Arc extinguished
48
Overview
1. General Overview
2. Drive Mechanism
3. Cubicle Integration
Arc-Killer SV-25 – DF-2+ Range
Drive Mechanism [1]
Energy required for operation stored in
compression spring
Stored energy is blocked until the system
receives a trigger signal
Arc-Killer SV-25 – DF-2+ Range
Drive Mechanism [2]
Trigger is not activated:
 Before arcing occurs in electrical unit
 As a result of environmental vibrations
RP 427-04: Test to demonstrate that arc-killers inside both units
will not operate during short-time current and peak withstand
current test
When an electrical fault occurs:
 Trigger signal is forwarded
 Stored energy is released
 Additional earthing knife action prevented
Arc-Killer SV-25 – DF-2+ Range
Drive Mechanism [3]
Front View
Rear View
Tension springs
Tension springs
Arc-Killer SV-25 – DF-2+ Range
Overview
1. General Overview
2. Drive Mechanism
3. Cubicle Integration
Arc-Killer SV-25 – DF-2+ Range
Integration of Arc-Killer SV-25
Expansion volume
Supplementary Earthing knife
Earthing knife
Drive mechanism SV-25
Trigger signal
Arc-Killer SV-25 – DF-2+ Range
Safety at all times
Cable compartment not accessible.
Interlock
Earthing
Paddle
Drive
Mechanism
SV-25
Released
Arc-Killer SV-25 – DF-2+ Range
Safety at all times
Cable compartment door freely accessible. (Door removed.)
Interlock
Earthing
Paddle
Drive
Mechanism
SV-25
Locked
Arc-Killer SV-25 – DF-2+ Range
Safety at all times
Arc-Killer SV-25 – DF-2+ Range
Safety at all times
Arc-Killer SV-25 – DF-2+ Range
Test & Certificates
Tests were carried out in accordance with IEC
62271-200
SV-25 meets the requirements:
 IAC AFL 20kA
 IAC BFLR 4.8kA
The Arc-Killer is activated quick enough to
reduce all harmful effects of an internal arc.
As a result, the consequences are negligible.
Arc-Killer SV-25 – DF-2+ Range