EMR-4000
IM02602009E
If the VT measurement location is not at the bus bar side but at the output side, the
following has to be taken into account.
When disconnecting the line, it has to be ensured by an
»External Blocking« that
undervoltage tripping cannot happen. In order to block the 27M element in case that the
breaker is open:
Assign the »
Bkr.POS OPEN«
signal to a blocking input (»ExBlo1« or »ExBlo2« within
the Global Parameters) of the
27M
element,
and
»ExBlo Fc« has to be set to “active” within the parameter sets of the the
27M
element.
When the auxiliary voltage is switched on and the measuring voltage has not yet been
applied, undervoltage tripping has to be prevented by an
»External Blocking«.
Otherwise a continuous tripping would occur, disabling the ability to energize again.
If phase voltages are applied to the measuring inputs of the device and field
parameter
»
Main VT Con
« is set to »
Wye
«, the messages issued by the voltage
protection module in case of actuation or trip should be interpreted as follows:
»27M[1].P
ICKUP
A« or »27M[1].T
RIP
A« => pickup or trip caused by phase voltage
»VA«.
»27M[1].P
ICKUP
B« or »27M[1].T
RIP
B« => pickup or trip caused by phase voltage
»VB«.
»27M[1].P
ICKUP
C« or »27M[1].T
RIP
C« => pickup or trip caused by phase voltage
»VC«.
However, if line-to-line voltages are applied to the measuring inputs and field
parameter
»
Main VT Con
« is set to »Phase to Phase«, then the messages should be
interpreted as follows:
»27M[1].P
ICKUP
A« or »27M[1].T
RIP
A« => pickup or trip caused by phase-to-phase
voltage
»VAB«.
»27M[1]. P
ICKUP
B« or »27M[1].T
RIP
B« => pickup or trip caused by phase-to-phase
voltage
»VBC«.
»27M[1]. P
ICKUP
C« or »27M[1].T
RIP
C« => pickup or trip caused by phase-to-phase
voltage
»VCA«
Criterion - Measuring Method
For all protection elements it can be determined, whether the measurement is done on basis of the »
Fundamental« or if
»
True RMS« measurement is used.
Dropout Ratio
The dropout ratio is settable.
www.eaton.com
585
Содержание EMR-4000
Страница 61: ...EMR 4000 IM02602009E Ethernet RJ45 Terminal Marking www eaton com 61 1 8 TxD TxD RxD N C N C RxD N C N C...
Страница 423: ...EMR 4000 IM02602009E Name Description Logic LE23 Out inverted Signal Negated Latched Output Q NOT www eaton com 423...
Страница 493: ...EMR 4000 IM02602009E Motor Protection Curves Motor Protection Curve Example 1 www eaton com 493...
Страница 494: ...EMR 4000 IM02602009E Motor Protection Curve Example 2 without RTDs www eaton com 494...
Страница 495: ...EMR 4000 IM02602009E Motor Protection Curve Example 3 with RTDs www eaton com 495...