Application; Signals - ABB Relion SMU615 Technical Manual

Section 5
Supervision functions
5.4.5
5.4.6
150

Application

The arc detection information from this function can be used in the standalone
devices, for an alarm or protection logic. Also this information can be also be utilized
in centralized solutions, for station-wide arc protection scheme. The arc detection
consists of:
• Optional arc light detection hardware with automatic backlight compensation for
lens type sensors
• Light signal output ARC_FLT_DET for routing indication of locally detected
light signal to the protection device
The light from an arc is detected locally, by lens sensors connected to inputs Light
sensor 1, Light sensor 2 or Light sensor 3 on the communication module of the
merging unit. The lens sensors can be placed, for instance, in the busbar compartment,
the breaker compartment and the cable compartment of the metal-clad cubicle.
The light detected by the lens sensors is compared to an automatically adjusted
reference level. Inputs Light sensor 1, Light sensor 2 and Light sensor 3 have their own
reference levels. When the reference level of one of the inputs is exceeded, light has
been detected.
The light signal output from an arc detection stage ARC_FLT_DET is activated
immediately in the detection of light in all situations. A centralized arc protection
solution is realized by routing the light signal output to an output contact connected to
a binary input of the protection device, or by routing the light signal output through the
communication.
Cover unused inputs with dust caps.

Signals

Table 191: ARCDSARC Input signals
Name Type
BLOCK BOOLEAN
Table 192: ARCDSARC Output signals
Name Type
ARC_FLT_DET BOOLEAN
Default Description
0=False Block signal for all binary outputs
Description
Fault arc detected=light signal output
1MRS758407 B
SMU615
Technical Manual