Human Machine Interface, Hmi; Arc Monitor; Dip Switch; Detector Inputs - ABB Arc Guard System TVOC-2 Installation And Maintenance Manual

ABB ARC GUARD SYSTEM™ – T VOC-2 INSTALL ATION AND MAINTENANCE GUIDE
3.2.1

Arc Monitor

The Arc Monitor is the heart in the system and handles
signalling and detection. The HMI handles conditions,
errors, and more. The system can be configured to trip
selected breakers, depending on which sensor detects
light. The DIP-switches that take care of this function
also handle settings like auto-reset and Current Sensing
Units. Energy is stored in the Arc Monitor for operation
up to 20ms for TVOC-2-48. This is sufficient to close the
tripping contacts even during a short time of power loss.
3.2.2

Human Machine Interface, HMI

The Human Machine Interface is used for all
communication with the user and also to confirm any
changes. It can be mounted both on the product and
on the cabinet door. This is preferred to be able to get
information about trips without opening the cabinet after
a trip. The HMI has a non-erasable memory which holds
trip logs and error logs even after power loss including a
time stamp.
The Arc Monitor can handle a second HMI module.
3.2.3

DIP switch

The DIP switch is a physical switch on the Arc Monitors
front. DIP switches are used to activate the CSU,
auto reset and assigning trip contacts. DIP switch
configuration is only possible in power off mode.
3.2.4

Detector Inputs

Detector inputs are used to connect the detectors to the
Arc Monitor.
3.2.5 Current Sensing Unit input
The Current Sensing Unit (CSU) is an accessory needed
only in those few specific applications where strong light
is expected on a regular basis. Current Sensing Units are
connected with an optical fibre using light as signal for
normal current. If the connection to CSU is lost an error
message will appear on the HMI display after 10 seconds.
The safety function of the Arc Guard System™ will not be
affected.
INFORMATION
DIP Switch 1 or/and 2 must be configured if the
CSU is in use.
To read more about the CSU configuration;
See: "One (1) CSU connected" on page 31.
3.2.6 Current Sensing Unit output
This output is used to pass the CSU signal forward to
another Arc Monitor.
3.2.7 External HMI connection
HMI can be mounted separately or a second module can
be connected (option).
INFORMATION
Only use the included three meter (118 inch)
cable for communication.
To learn more about the HMI functions;
See: "5 Human Machine Interface (HMI)" on
page 37.
3.2.8 Solid state tripping contacts (IGBT)
The three solid state trip contacts, K4, K5 and K6 are used
to trip the circuit breakers. This will stop the energy from
feeding the arc.
At normal condition:
• K4 Open, no arc detected
• K5 Open, no arc detected
• K6 Open, no arc detected
3.2.9

Signal Relays

The Internal Relay Fault (IRF), K1 indicates the system
status. At normal condition the K1 is energized and signals
that no diagnostics error is detected on the Arc Guard
System.
The two trip signal relays, K2 and K3 are used to signal
when a trip occurs. The relays can be used to activate
an alarm or to pass the trip information to a supervised
system.
The signal relays are called K2 and K3.
• K2 de-energized, no arc detected
• K3 de-energized, no arc detected
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