Transcript Presentazione di PowerPoint

ND10
LOW IMPEDANCE RESTRICTED
DIFFERENTIAL EARTH FAULT
PRON
ND10 – 64REF
NEW PRODUCT FROM
THYTRONIC
PROTECTIVE FUNCTIONS
•
•
50/51 Phase overcurrent
50N/51N - 87NHIZ. Residual
overcurrent or high impedance
restricted differential ground fault
•
64REF Biased restricted differential
ground fault
•
PRON
ND10 – 64REF
BF Breaker Failure
NEW PRODUCT FROM
THYTRONIC
2
64REF – MOST COMMON APPLICATIONS
•
Like
every
differential
protective function 64REF is
largely adopted in case of
high selectivity needs.
64REF
•
G
~
generator
64REF
PRON
ND10 – 64REF
Common applications are
protection
and
transformer protection.
NEW PRODUCT FROM
THYTRONIC
3
BEFORE ND10 – 87NHIZ ONLY
3 CT’s
Low leakage
reactance type
according to IEC
Class PX, TPS or
BS Class X
•
•
•
•
•
SEVERAL CONS
STABILIZING
RESISTOR
Design
NAXX
Large cubicle
87N
Connections
Low liability
External devices
METROSIL
50 51
3 CT’s
Phase Currents
EXPENSIVE SOLUTION
PRON
ND10 – 64REF
NEW PRODUCT FROM
THYTRONIC
4
ND10 – ONE DEVICE ONLY
ND10
CT
Residual current
50 51
3 CT’s
Phase Currents
CHEAPER SOLUTION
PRON
ND10 – 64REF
NEW PRODUCT FROM
THYTRONIC
5
ND10 – 64 REF LOW IMPEDANCE FROM SAME INPUTS
•
and current from earth connection.
ND10
50N
51N
Separate inputs for phase current
64
REF
•
Earth overcurrent and biased
restricted earth fault protective
functions both contemporaneously
50 51
performed.
•
Phase overcurrent protective
function from same 3 CT’s set.
RELIABLE SOLUTION
PRON
ND10 – 64REF
NEW PRODUCT FROM
THYTRONIC
6
ND10 – MANY ADVANTAGES
•
ND10
50N
51N
64
REF
50 51
•
•
•
•
Biased 64REF is internally
calculated.
Easy connections.
RS and METROSIL design is not
required.
No one external device is needed
for stabilization.
Smaller cubicles.
EASIEST SOLUTION in case of
EARTH FAULT DIFFERENTIAL
FUNCTION
PRON
ND10 – 64REF
NEW PRODUCT FROM
THYTRONIC
7
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 Support
Oscar Ornago
tel. +39.02.57495753
e-mail: [email protected]
PRON
ND10 – 64REF
NEW PRODUCT FROM
THYTRONIC
8