NEW PRODUCT FROM THYTRONIC PRO N ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH...
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Transcript of NEW PRODUCT FROM THYTRONIC PRO N ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH...
NEW PRODUCT FROMTHYTRONIC
PRONND10 – 64REF
ND10
LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT
ND10
LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT
NEW PRODUCT FROMTHYTRONIC
PRONND10 – 64REF
2
PROTECTIVE FUNCTIONSPROTECTIVE FUNCTIONS
•50/51 Phase overcurrent
•50N/51N - 87NHIZ. Residual
overcurrent or high impedance
restricted differential ground fault
•64REF Biased restricted
differential ground fault
•BF Breaker Failure
NEW PRODUCT FROMTHYTRONIC
PRONND10 – 64REF
3
64REF – MOST COMMON APPLICATIONS64REF – MOST COMMON APPLICATIONS
•Like every differential
protective function
64REF is largely adopted
in case of high selectivity
needs.
•Common applications
are generator protection
and transformer
protection.
G~64REF
64REF
NEW PRODUCT FROMTHYTRONIC
PRONND10 – 64REF
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BEFORE ND10 – 87NHIZ ONLYBEFORE ND10 – 87NHIZ ONLY
50 51
NAXX
87N3 CT’s
Low leakage reactance type
according to IEC Class PX, TPS or
BS Class X
METROSIL
STABILIZING RESISTOR
3 CT’sPhase Currents
SEVERAL CONS
• Design
• Large cubicle
• Connections
• Low liability
• External devices
EXPENSIVE SOLUTION
NEW PRODUCT FROMTHYTRONIC
PRONND10 – 64REF
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ND10 – ONE DEVICE ONLYND10 – ONE DEVICE ONLY
50 51
ND10
3 CT’sPhase Currents
CHEAPER SOLUTION
CTResidual current
NEW PRODUCT FROMTHYTRONIC
PRONND10 – 64REF
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ND10 – 64 REF LOW IMPEDANCE FROM SAME INPUTS
ND10 – 64 REF LOW IMPEDANCE FROM SAME INPUTS
50 51
ND10
64 REF
RELIABLE SOLUTION
•Separate inputs for phase
current and current from earth
connection.
•Earth overcurrent and biased
restricted earth fault protective
functions both
contemporaneously performed.
•Phase overcurrent protective
function from same 3 CT’s set.
50N 51N
NEW PRODUCT FROMTHYTRONIC
PRONND10 – 64REF
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ND10 – MANY ADVANTAGESND10 – MANY ADVANTAGES
50 51
ND10
64 REF
EASIEST SOLUTION in case of EARTH FAULT
DIFFERENTIAL FUNCTION
•Biased 64REF is internally calculated.
•Easy connections.
•RS and METROSIL design is not required.
•No one external device is needed for stabilization.
•Smaller cubicles.
50N 51N
NEW PRODUCT FROMTHYTRONIC
PRONND10 – 64REF
8
Piazza Federico Mistral, 7
20139 Milano (MI)
ITALY
Tel: +39.02.5749571
Fax: +39.02.57403763
e-mail: [email protected]
company web site: www.thytronic.it
products web site: www.pro-n.it
External Market SupportOscar Ornago
tel. +39.02.57495753e-mail: [email protected]