Page 15 - Arc Guard System - TVOC-2

ABB ARC GUARD SYSTEM™ – TVOC-2 INSTALLATION AND MAINTENANCE GUIDE 15

3.2.1 Arc Monitor INFORMATION
DIP Switch 1 or/and 2 must be configured if the
The Arc Monitor is the heart in the system and handles CSU-2 is in use.
signalling and detection. The HMI handles conditions,
errors, and more. The system can be configured to trip To read more about the CSU-2 configuration;
selected breakers, depending on which detector detects
light. The DIP-switches that take care of this function See: “One (1) CSU-2 connected” on page 31.
also handle settings like auto-reset and Current Sensing
Units. Energy is stored in the Arc Monitor for operation 3.2.6 Current Sensing Unit output
up to 20ms for TvOC-2-48. This is sufficient to close the 03
tripping contacts even during a short time of power loss. This output is used to pass the CSU-2 signal forward to
another Arc Monitor.
3.2.2 Human Machine Interface, HMI and
HMI-COM 3.2.7 External HMI connection

HMI can be mounted separately or a second module can
The Human Machine Interface is used for all be connected (option).
communication with the user and also to confirm any
changes. It can be mounted both on the product and on INFORMATION
the cabinet door (not HMI-COM). This is preferred to be Only use the included 3 meter (118 inch) cable
able to get information about trips without opening the for communication.
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. HMI-COM is a connected version To learn more about the HMI functions;
of HMI available using Modbus RTU. HMI-COM shall not be See: “5 Human Machine Interface (HMI)” on
mounted on the door. page 37.

The Arc Monitor can handle a second HMI module. 3.2.8 Solid state tripping contacts (IGBT)

3.2.3 DIP switch The three solid state trip contacts, K4, K5 and K6 are used
to trip the circuit breakers. This will stop the energy from
The DIP switch is a physical switch on the Arc Monitors feeding the arc.
front. DIP switches are used to activate the CSU-2,
auto reset and assigning trip contacts. DIP switch At normal condition:
configuration is only possible in power off mode.
• K4 Open, no arc detected

3.2.4 Detector Inputs • K5 Open, no arc detected

Detector inputs are used to connect the detectors to the • K6 Open, no arc detected
Arc Monitor. There are two types of detectors. One type
that is used for the base unit and E1/E3 extension module.
A second type of detectors with a duplex fiber is used
solely for the E6-S extension module.

3.2.5 Current Sensing Unit input

The Current Sensing Unit (CSU-2) 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 fiber using light as signal for
normal current. If the connection to CSU-2 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.