Arc Protection Arcsarc - ABB REF615 Applications Manual

Section 5
Protection functions
5.4
5.4.1
5.4.2
5.4.3
162

Arc protection ARCSARC

Identification
Table 68: Function identification
IEC 61850 identification:
IEC 60617 identification:
ANSI/IEEE C37.2 device number:
Functionality
The arc protection (ARCSARC) detects arc situations in air insulated metal-clad
switchgears caused by, for example, human errors during maintenance or insulation
breakdown during operation.
The function detects light from an arc either locally or via a remote light signal. The
function also monitors phase and residual currents to be able to make accurate
decisions on ongoing arcing situations.
The function contains a blocking functionality. Blocking deactivates all outputs and
resets timers.
Application
The arc protection can be realized as a stand-alone function in a single relay or as a
station-wide arc protection, including several protection relays. If realized as a
station-wide arc protection, different tripping schemes can be selected for the
operation of the circuit breakers of the incoming and outgoing feeders. Consequently,
the relays in the station can, for example, be set to trip the circuit breaker of either
the incoming or the outgoing feeder, depending on the fault location in the switchgear.
For maximum safety, the relays can be set to always trip both the circuit breaker of
the incoming feeder and that of the outgoing feeder.
The arc protection consists of:
• Optional arc light detection hardware with automatic backlight compensation for
lens type sensors
• Light signal output FLT_ARC_DET for routing indication of locally detected
light signal to another relay
• Protection stage with phase- and earth-fault current measurement.
The function detects light from an arc either locally or via a remote light signal.
Locally, the light is detected by lens sensors connected to the inputs Light sensor 1,
Light sensor 2, or Light sensor 3 on the serial communication module of the relay.
ARCSARC
ARC
50L/50NL
1MRS756378 D
REF615
Application Manual