new product from thytronic pro n nd10 – 64ref nd10 low impedance restricted differential earth...

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NEW PRODUCT FROM THYTRONIC PRON ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT

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Page 1: NEW PRODUCT FROM THYTRONIC PRO  N ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT 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

Page 2: NEW PRODUCT FROM THYTRONIC PRO  N ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH

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

Page 3: NEW PRODUCT FROM THYTRONIC PRO  N ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH

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

Page 4: NEW PRODUCT FROM THYTRONIC PRO  N ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH

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

Page 5: NEW PRODUCT FROM THYTRONIC PRO  N ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH

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

Page 6: NEW PRODUCT FROM THYTRONIC PRO  N ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH

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

Page 7: NEW PRODUCT FROM THYTRONIC PRO  N ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH

NEW PRODUCT FROMTHYTRONIC

PRONND10 – 64REF

7

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

Page 8: NEW PRODUCT FROM THYTRONIC PRO  N ND10 – 64REF ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH FAULT ND10 LOW IMPEDANCE RESTRICTED DIFFERENTIAL EARTH

NEW PRODUCT FROMTHYTRONIC

PRONND10 – 64REF

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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]