Littelfuse Startco SE-330HV, Руководство пользователя

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Page 5
SE-330HV Neutral-Grounding-Resistor Monitor
Rev. 5-M-101817
communications. The default mode is non-fail-safe. In
non-fail-safe mode, relays energize on fault.
Network-enabled SE-330HV’s can be remotely tripped
and reset by the network master. The red DIAGNOSTIC
LED indicates a network-initiated trip. See Section 2.7.
Refer to the appropriate SE-330HV communications
manual.
2.5 R
ELAY
K1 LED
The yellow RELAY K1 LED follows the state of relay
K1 and is on when K1 is energized (contact closed).
2.6 U
NIT
H
EALTHY
O
UTPUT
UNIT HEALTHY relay K4 is energized when the
processor is operating. It can be ordered with N.O. or
N.C. contacts. See Section 7.
N
OTE
: The output changes state momentarily during a
processor reset.
N
OTE
: K4-contact rating is 100 mA maximum.
2.7 D
IAGNOSTIC
LED
The DIAGNOSTIC LED is used to annunciate trips
without individual LED indication. The number of short
LED pulses between pauses indicates the cause of the trip.
By default, both critical and non-critical diagnostic flash
codes are shown. Non-critical diagnostic codes include SD
Card status and USB Error status. All other diagnostic
codes are considered critical.
Starting with SE-330HV firmware version 2.60 and SE-
MON330 software version 3.8, the SE-330HV can be
configured to show only critical diagnostic codes. In this
configuration, non-critical diagnostic codes will not be
indicated with the DIAGNOSTIC LED.
Diagnostic messages are always visible with the SE-
MON330.
See Sections 4.2 and 5.
2.8 A
NALOG
O
UTPUT
An isolated 4-20-mA output indicates NGR current with
full-scale output corresponding to the CT rating. An
internal 24-Vdc supply allows the analog output to be
connected as a self-powered output. Power from an
external supply is required for loop-powered operation.
See Fig. 2. A PGA-0520 analog meter can be panel-
mounted to display the NGR current. See Fig. 19 and
Section 7.
FIGURE 2. Analog-Output Connections.