All the available protection and logic functions described in Section 3 are stored as a software module library in the 216VC62a processing unit.
All the user settings for the activated functions and the configuration of the protection, i.e. assignment of I/P and O/P signals (channels) to the protection functions, are also stored in this unit. The software is downloaded using the operator program. The protection functions and their associated settings necessary for a particular plant are selected and stored with the aid of the portable user interface (PC). Every activated function requires a certain percentage of the total available computing capacity of the processing unit (see Section 3).
The processing unit 216VC62a has a computing capacity of 425%. The 216VC62a is used both as a processor and as an interface to the interbay bus (IBB) in the substation monitoring system (SMS) and the substation automation system. The available communication protocols are: SPA BUS LON BUS MCB interbay bus MVB process bus.
The SPA BUS interface is always available. The LON and MVB protocols are transferred by PC cards. The supply to the memory in the 216VC62a is maintained in the event of an interruption by a gold condenser so that the event list and disturbance recorder data remain intact. The disturbance recorder data can be read via either the interface on the front of the 216VC62a or the object bus. The data can be evaluated using the “EVECOM” evaluation program. The internal clock of the RE. 216 can be synchronised via the object bus interface of SMS/SCS systems or by a radio clock. I/P signals (channels) from the B448C bus:
digitised measured variables: primary system currents and voltages logic signals: external I/P signals 24 V auxiliary supply and data exchange with the B448C bus. O/P signals (channels) to the B448C bus: signal O/P’s from the protection and logic functions selected tripping O/P’s from the protection and logic functions selected data exchange with the B448C bus. The designation of the I/O channels is identical to that of the I/O unit (see Table 2.1). The main components of the unit are
216VC62A HESG324442R13
Post time: Sep-27-2024