ABB 216AB61 HESG324013R101 Control Panel-Specifications

216NG61/: Auxiliary supply units; DC/DC converters 

216NG62 

216NG63 

216VC62a : Processor unit 

216EA61 : Analogue I/P unit (A/D converter) 

216AB61 : Binary O/P unit 

216DB61 : Binary I/P and tripping unit

The primary system c.t's and v.t's are connected directly to the 216GW61 input transformer unit. The signals of the measured input variables are stepped down to a suitable level for process ing by the electronic circuits (analogue signals) and transferred via the system cable to the 216EA61 unit, which digitises them and transmits them to the B448C parallel bus.

The digitised measured variables derived from the primary sys tem 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 trip ping command is transmitted via the B448C bus to the 216AB61 O/P unit resp. to the 216DB61 I/O unit. The allocation of the sig nals and tripping commands at the O/P’s of the protection func tions 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 re lay unit. The auxiliary relays' contacts are potentially-free and wired to terminals for connection to external signalling and trip ping 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 appropri ate 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 in puts. This is an option, which must be specified in the order to enable the corresponding wiring to be included when engineer ing 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 re dundant 216NG61, 216NG62 or 216NG63 auxiliary d.c. supply

units. Redundant units can be connected to the same or to two different station batteries.

All software configuration, i.e. selection and setting of the pro tection functions and the assignment of signals to the inputs and outputs, is performed via the RS-423 serial interface on the 216VC62a processing unit. The corresponding connector is the 25 pin socket X2 on the front of the unit, to which a personal computer is connected.

Layout of equipment rack Type 216MB66

shows an example of the arrangement of the electronic units in the equipment rack. The equipment rack is sub-divided into 21 divisions (T). Divisions 1-3 and 19-21 are always used for auxiliary d.c. supply units 216NG61, 216NG62 or 216NG63. In principle, the electronic units may be located in any of the re maining divisions 4-18, providing that the system cable con nections were correspondingly installed. For reasons of stan dardisation, however, the various types of units are always lo cated at the same position in the equipment rack.

The designations and numbering of the I/O signals for the I/P and O/P units of a protection system are given in the column "I/O channel definition". Note that the quantity of I/O channels given for each group of the same type of units refers to the particular equipment rack and not the entire system. The total quantity of I/O channels for the entire system is given by the number of I/O units installed (see also Section 2.2.3. and the set of specific plant diagrams).

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