ata position of the Article No to Order code B4-FV-22-D Bevel-helical gear Reduction Boxes B4

Flender/Flender Gear Units/Bevel-helical gear Reduction Boxes B4

ystem shall be furnished in complete as required for each indi vidual elements, instrument or system unless spec ifically stated otherwise in th is specification. Redundancy of components and system shall be governed by availa bility criteria to ensure the system availability target as well as safety conside rations in critical applications. Separate sensors shall be provi ded for Control / protection and Monitoring and alarm If transmitters signal is used for control, there shall be nother transmitter furnished for measurement with facility for transfer of signal to use the measurement transmitter for control, in the event of loss of control transm itter. The transfer operations shall be noti fied in HMI by alarm. Any single failure of instrument or control equipment shall no affect the performance of the unit in anyway. For very critical application like protection of Gas Compressor and its auxiliaries, Governor Control system, 2 out of 3 redundant sensor / transmit ters shall be used. 2 out of 3 system modules shall al so be provided for this application. For balance protection rest of the closed loop controls, sequen tial logic and related measurement dual redundant hardware shall be used. For balance measurement non-re dundant hardware may be used. The common plant PLC shall have 1:1 hot bump less redundancy in following levels: Main processor, (CPU) Communication module, / modules (for cr itical /Os), Network interface module, Communication cable and Power supply other than those which are to be achieved through 2 out of 3 configuration. For all measurements, independent transmitters shall be connect tapping points. Operation & Maintenance 1 of 1 INDRADHANUSH GAS GRID LIMITED TECHNICAL SPECIFICATION FOR NATURAL GAS COMPRESSOR STATION FOR NORTH EAST GAS GRID PIPELINE PROJECT TS NO.: MEC//2UU/0/2/0 Control & Instru mentation (&) Chapter-0.0 2, MECON Limited,