Thytronic XMR-T - Page 117

FUNCTION CHARACTERISTICS
117
Similarly the trip of the IE(H)>> element may be inhibited by start of the third element (IE(H)>>>) by
setting ON the Disable IE(H)>> by start IE(H)>>> (IE(H)>>disbyIE(H)>>>) parameter available
inside the Set \ Profile A (or B or C or D) \ Calculated residual overcurrent-50N(Comp)/51N(Comp)
side H \ IE(H)>>> Element \ Setpoints menus for side H element, the IE(L)>>disbyIE(L)>>> para-
meter available inside the Set \ Profile A (or B or C or D) \ Calculated residual overcurrent-50N(Com-
p)/51N(Comp) side L \ IE(L)>>> Element \ Setpoints menus for side L element and the IE(T)>>di-
sbyIE(T)>>> parameter available inside the Set \ Profile A (or B or C or D) \ Calculated residual
overcurrent-50N(Comp)/51N(Comp) side T \ IE(T)>>> Element \ Setpoints menus for side T element.
All the parameters can be set separately for Profile A, B, C, D.
E’ regolabile un tempo di ripristino costante per ciascuna delle soglie (t
E(H)
>
RES
, t
E(H)
>>
RES
,
t
E(H)
>>>
RES
per il lato H e t
E(L)
>
RES
, t
E(L)
>>
RES
, t
E(L)
>>>
RES
per il lato L).
Breaker failure (BF)
Each thresholds (IEC>, IEC>>, IEC>>>) can be associated to BF protection by activating the relative
parameter in the matrices “Selection of function tripping for BF” in relevant BF menus
[1]
:
• Set \ Profile A (or B or C or D)\ Breaker failure
Second harmonic restraint
For all elements, a block from the second harmonic restraint may be set by setting ON the IEC>2n-
dh-REST,IEC>>2ndh-REST,IEC>>>2ndh-REST.
The parameters are available inside the Set \ Profile A (or B or C or D) \ Residual overcurrent-50N(Com-
p)/51N(Comp) \ IEC> Element (IEC>> Element, IEC>>> Element) \ Setpoints menus.
Cold load pickup (CLP)
If the CLP function (Cold Load Pick-up) is enabled for element blocking, the element may be blocked
for an adjustable time interval, starting from circuit breaker closure.
If the CLP function (Cold Load Pick-up) is enabled for setting change, the selected threshold may be
changed for an adjustable time interval, starting from the circuit breaker closure.
The operating mode may be select by setting
ON-Elementblockingor ON-Changesetting the
IECCLP>Mode,IECCLP>>Mode,IECCLP>>>Mode parameter.
The operating modes and the CLP Activation time parameters (
tECCLP>, tECCLP>> e tEC-
CLP>>>) may be adjusted inside the Set \ Profile A (or B or C or D) \ Residual overcurrent-50N(Com-
p)/51N(Comp) \ IEC> Element (IEC>> Element, IEC>>> Element) \ Setpoints menus.
The threshold inside CLP (
IECCLP>def, IECCLP>inv,....) can be set inside the Set \ Profile
A (or B or C or D) \ Residual overcurrent-50N(Comp)/51N(Comp) \ IEC> Element (IEC>> Element,
IEC>>> Element) \ Definite time (Inverse time) menus.
For every of the four thresholds the following block criteria are available:
Logical block (Block1)
If the IEC>BLK1, IEC>>BLK1 and/or IEC>>>BLK1 enabling parameters are set to ON and
a binary input is designed for logical block (Block1), the concerning element is blocked off whe-
never the given input is active.
[2]
The enabling parameters are available inside the Set \ Profile
A (or B or C or D) \ Residual overcurrent-50N(Comp)/51N(Comp) \ IEC> Element (IEC>> Element,
IEC>>> Element) \ Setpoints menus, while the Block1 function must be assigned to the selected
binary input inside the Set \ Board1(2) inputs \ Binary input IN1-1...INx-x) menus .
Selective block (Block2)
All along the protective elements the selective block may be set.
The logic selectivity function may be performed by means any combination of the following I/O:
• One committed pilot wire input (BLIN1).
• One or more binary inputs designed for input selective block.
• One committed pilot wire output (BLOUT1).
Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu.
Note 2 The description of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITORING section
IEC> element residual overcurrent 50N(Calc)/51N(Calc) - Timers
IEC> Start
IEC> Trip
RESET
INPUT
t
EC
t
EC
t
EC>RES
t
EC>RES
t
EC>RES
t
XMR-T EQUIPMENT MANUAL
Ed. 2.9 - 02/2021