ABB ATS022, Installation And Operating Instructions Manual

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1SDH000760R0002, L4106
Installation and operating instructions, ATS022
3.2.2 CB Withdrawn
In the case of withdrawable circuit breakers, the auxiliary contacts for the CB inserted are connected
to these inputs (withdrawn=open contact). In the case of a withdrawn circuit breaker, the transfer
switch logic is disabled (DO6 activated, Alarm LED is ON) and the unit goes in the Manual Mode (DO10
activated, Auto LED is OFF). When a CB is re-inserted, the logic is enabled (DO6 disactivated, Alarm LED
is OFF) and the ATS022 is in the Manual Mode (DO10 activated, Auto LED is OFF).
To set the ATS022 in the Automatic Mode the RESET key must be pushed (DO10 disactivated, Auto LED
is ON).
3.2.3 CB Trip, DI4, DI5
The signalling contacts for tripping the normal and emergency line circuit breakers are wired to these
inputs. In the case of CB tripping, the automation logic is disabled (DO6 activated, Alarm LED is ON).
After resetting the signals of CBs trip the logic is enabled again (DO6 disactivated, Alarm LED is OFF).
3.2.4 Gen-Set Alarm, DI8
A Gen-set alarm prevents switching to the emergency line. In the case of the power supply from the
emergency line, when an alarm occurs, ATS022 keeps the line 2 with logic OFF; to enable the logic the
alarm must be reset.
This input can be used to wire several alarms coming from the Gen-set in parallel: oil pressure loss, over
temperature, etc.
An alarm is signaled by the Alarm LED on the front of the device, and the relative electrical contact is
closed.
3.2.5 Forced switching to the emergency supply line, DI9
Some short-period industrial processes require power supplied from a Gen-Set rather than normal line
power, to avoid any possible supply anomalies and to guarantee a higher level of reliability.
Forced switching to the emergency line can be easily carried out keeping this input closed (only in the
Automatic Mode).
This operation starts the complete transfer to the emergency line switching procedure:
Gen-Set start
Normal line circuit breaker opening
Emergency line circuit breaker closing
The power supply from the emergency line remains as long as this command is active. When the
command is disarmed, the reverse transfer to the normal supply line switching procedure is started.
3.2.6 Switching logic enable/disabled, DI3
When this input is closed, the switching logic is enabled. The function is used for integrating general
alarms originating from the plant.
3.2.7 The command to startup the generator, DI10
When this input is activated the generator is started.
3.2.8 Third CB status input, DI11
This input is connected to the bus tie circuit breaker auxiliary contact.
3. Description