prs ufes standard s3 en 4zu3 2011-0527 v4 amc nx
TRANSCRIPT
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ABB04.07.2011 UFES Ultraschneller Erdungsschalter | 1
Ultra Fast Earthing SwitchType UFES
ABB AG, PPMV, V11.05.27
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Ultra Fast Earthing Switch type UFES The new active internal arc protection
The new Ultra Fast Earthing Switch type UFES
Active internal arc protection in addition to available passive protection applicable for nearly all short-circuit proof, air-insulated switchgear
Highest possible protection for switchgear in regard to the hazardous impacts caused by an internal arc
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Ultra Fast Earthing Switch type UFES S Speed, Safety, Savings
Speed A question of (Operation-) time Nearly immediate extinction of an internal arc by fastest intervention of the Ultra Fast Earthing Switch.
Safety Greatly enhanced protection for personnel, switchgear and the environmentA drastically reduced internal arc duration ensures minimized pressure and temperature rise. This leads, as a consequence, to minimal impacts at the fault location.
Savings The insurance for your switchgearGreatly increased system and process availability in combination with drastically reduced repair costs.
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Internal arc faultsReasons of formation
1. Human errors
2. Pollution
3. Animals
4. Overvoltage
5. Bad connections
6. Mechanical faults
7. Defective devices(e.g. voltage transformer)
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Internal arc faultsEffects
Rapid pressure rise
Heavy injuries of the personnel possible
for switchgear systems without internal arc classification
Heavy damages possibleinside of the switchgear, for the integrated devices
and for the building
Burning and vaporizationof metal and insulation
material
Release of material fragments and hot
gases
Rapid temperature rise(up to 20.000C)
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Internal arc faultsImpacts
Circuit breaker compartment after internal arc impact
Cable connection compartment after internal arc impact
Contact terminal after internal arc impact
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Active internal arc protection by ABBThe basis for effective protection
Electronic detection and tripping unit type QRU1
Continuously monitoring of a defined protection area
Fast and reliable detection of an internal arc fault by light and fault current parameter
3 Primary switching elements type U1
Ultra-fast initiation of a 3-phase short-circuit earthing after detection of a fault by the electronic
Elimination of the arc by resulting breakdown of the internal arc voltage
Ultra Fast Earthing Switch type UFES
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Ultra Fast Earthing Switch type UFESSequence of tripping operation
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Active internal arc protection by ABB Ultra-fast reaction time
Effective limitation of damage requires fastest intervention
Extinction time of the Ultra Fast Earthing Switch:< 4 ms after fault detection
Short-circuit current IkDC component
Arcing time with UFES
Final clearing by upstream circuit-breaker 80 ms + time x
Reaching time for tripping criteria
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Ultra Fast Earthing Switch type UFES Electronic
Electronic detection and tripping unit typeQRU1
Completely in fast analogue technology
9 optical inputs for light detection by means of single lens sensors
3 current inputs for monitoring of the instantaneous current value
Up to 5 x 30 additional optical inputs with ABB arc guard type TVOC-2
Exact identification of the fault location
Continuous self monitoring
Testing mode
Simple configurationLens sensor for optical detection
Electronic detection and tripping unit type QRU 1
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8
9
Ultra Fast Earthing Switch type UFES Primary switching element
Primary switching element type U1
Vacuum interrupter and operating system integrated in one compact unit
Fast and reliable micro gas generator operating mechanism
Fast switching time of ~ 1.5 ms
Easy handling
Low-maintenance
Flexible installation
6. Piston7. Cylinder8. Moving contact system9. Micro gas generator
1. Epoxy insulator2. Fixed contact3. Ceramic insulator4. Moving contact pin5. Rupture joint
Primary switching element section view
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Ultra Fast Earthing Switch type UFES Switching principle
Position after trippingService position
Drive
Vacuum-interrupter
Current flowafter tripping
Movingdirection
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Ultra Fast Earthing Switch type UFES Speed Differentiation
Conventional protection device
Fault detection by standard relay
Clearing of the arc fault current by the upstream circuit-breakerFast-acting protection relay with supplementary equipment Fast fault detection by special protection relay Clearing of the arc fault current by the upstream circuit-breaker
Ultra Fast Earthing Switch type UFES
Ultra-fast fault detection by UFES electronic type QRU1
Ultra-fast extinction of an internal arc by switching of the UFES primary switching element type U1
Final clearing of the fault current by the upstream circuit-breaker
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Ultra Fast Earthing Switch type UFES Speed Differentiation
Warc [kVAs]*
* Constant arc voltage & fault current for the complete fault time Uarc Ik t = Warc (linear function)
Time in ms
Fast protection relay
Limited consequences for equipment and personnel (depending on switchgear design)
Conventional protection device
Dramatic consequences possible
Fire/Explosion hazard, heavy injuries of personnel (depending on switchgear design)
Ultra Fast Earthing Switch type UFES
Arc extinction < 4 ms after detection
Drastic reduction of thermal damages
Drastically reduced pressure rise
No consequences to be expected !
Steel fire
Copper fire
Cable fire
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Ultra Fast Earthing Switch type UFES Speed & Safety Pressure curves
Exemplary pressure curve, with and without UFES, in a compartment of an air insulated medium voltage switchgear, for an internal arc fault current of 130 kA (peak) / 50 kA (rms)
Overpressurein bar
Pressure risewithout UFES
Pressure risewith UFES
Reaching time fortripping criteria
tTC
Time in mstTC + 4 ms
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Ultra Fast Earthing Switch type UFES Safety & Savings The internal arc test with UFES
Busbar compartment afterinternal arc impact with activeUFES protection
Point of fault initiation in the busbar compartment
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Ultra Fast Earthing Switch type UFES S - Comparison
Busbar compartment afterinternal arc impact with activeUFES protection
Busbar compartment afterinternal arc impact withoutactive UFES protection(50 kA / 100 ms)
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Ultra Fast Earthing Switch type UFES The formula for effective internal arc protection
Speedy arc suppression
Safety for investment and personnel
Savings in regard of repair and downtime costs
UFES = S
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Ultra Fast Earthing Switch type UFES Applicable for highest requirements
Maximum rated voltage:
Ur = 40.5 kV Ik = 40 kA (3s)
Maximum rated short-time withstandcurrent for medium voltage:
Ik = 50 kA (3s), 63 kA (1s) Ur = 17.5 kV
Maximum rated short-time withstandcurrent for low voltage :
Ik = 100 kA (0.5s) Ur = 1.4 kV
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Ultra Fast Earthing Switch type UFES Available as loose components
Electronic detection and tripping unit typeQRU1
3 Primary switchingelements (PSE) type U1
1 set (3 off) Trippingcables (10 m) withspecial plug for PSE and electronic
UFES-kit as OEM product, consisting of:
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Ultra Fast Earthing Switch type UFES Available as ABB Service retrofit solution
Service-Box
Service-Box(Illustration: Side-mounted)
Draw-out technology
Draw-out unit
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Ultra Fast Earthing Switch type UFES Available for ABB switchgear (AIS)
UFES in UniGear Top-Box installation
UFES in UniGear -Installation in
cable compartment
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Ultra Fast Earthing Switch type UFES S - Unbeatable advantages
Indirect benefit
Greatly increased system and process availability byavoidance of heavy damages inside the switchgear, of theequipment and the direct environment
Drastic reduction of downtimes and repair costs
Example for a production site(e.g. chemical-, paper- or oil industry)
Risks: Exchange of damaged switchgear panel(s) orequipment necessary
Consequence: Loss of production for possibly some daysor weeks
Costs: Up to multiple 100.000 EUR / day possible
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Ultra Fast Earthing Switch type UFES S - Unbeatable advantages
Direct benefit
Greatly increased operator safety for switchgears
Minimization of pressure rise and gases in the faultycompartment and surrounding switchgear building
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Ultra Fast Earthing Switch type UFES UFES = S
Are you attracted by theUFES?
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