216GD61a HESG324436R3/A ABB Control unit new automatic controller module

Description

The digitised measured variables derived from the primary system quantities are continuously compared by the processing unit
216VC62a with the pick-up settings of the protection functions. If
a protection function picks up, the corresponding signal or tripping command is transmitted via the B448C bus to the 216AB61
O/P unit resp. to the 216DB61 I/O unit. The allocation of the signals and tripping commands at the O/P’s of the protection functions to the various channels of the 216AB61 output unit or of the
216DB61 I/P signal and tripping unit is also determined by the
software installed in the 216VC62a processor unit.
The output signals from the 216AB61 unit (signalling channels)
and 216DB61 unit (trip channels) control the auxiliary relays
K1…K16 of the 216GA61 O/P relay unit or 216GA62 tripping relay unit. The auxiliary relays’ contacts are potentially-free and
wired to terminals for connection to external signalling and tripping circuits.
The external input signals connected to the protection energise
the auxiliary relays K1…K16 in the 216GE61 I/P relay unit. The
potentially-free contacts of K1…K16 transmit the external signals
to the 216DB61 unit and thence to the B448C bus. By appropriate configuration of the software in the 216VC62a processing
unit, external signals can be assigned to the various protection
functions, e.g. for logical combination (interlocking and blocking)
with trip signals or for exciting the tripping channels 1…8.
Tripping circuits 1…8 can be directly energised by all or just
some of the I/P channels 1…10 (K1…K10) of 216GE61 via the
diode matrix (tripping logic) of 216GA62 (see Section 2.6.).
Provision is also made for some of the channels 9…16
(K9…K16) of 216GE61 to be used for supervising the external
tripping circuits 1…8 instead of for the connection of external inputs. This is an option, which must be specified in the order to
enable the corresponding wiring to be included when engineering the protection.
In order to supply the electronic units with power the protection
must be connected to an external auxiliary d.c. supply (station
battery). The auxiliary d.c. supply unit 216NG61, 216NG62 or
216NG63 (DC/DC converters) steps the station battery voltage
down to 24 V and provides electrical insulation between input
and output voltages. The 24 V supply is distributed to the units
inserted in the protection equipment rack via the B448C parallel
bus. The 216NG61, 216NG62 or 216NG63 power supply unit
also supplies the electronic circuits on the I/O units. A 216MB66
equipment rack can be equipped with just one or with two redundant 216NG61, 216NG62 or 216NG63 auxiliary d.c.