H4-KH-15-A s to be lubricated are immersed in the oil or are Helical gear box H4

Flender/Flender Gear Units/Helical gear box H4

interlocked mode. () Remote control commands .. Open/Close/Stop shall be gener ated from PLC and shall be wired to CC through interposing relays. () Remote command are generated from TFT monitor function keyb oard using Video process control function or from automatic operatio of the drive on Interlock conditions that are realized in PLC. Int ermediate Stop PB shall be available in Process Control Function block in TFT for ON/OFF duty bidirectional drive. () Necessary electrical protecti ons and valve position limit witch/torque switch interlock shall be realized in MCC for local operation. For remote operation, process interlocks shall be realized in PLC. However, Limit Switches and Position Transmitters shall also connected to PLC for status feedback. Thus drive can be operate from remote provided all process and electrical interlocks conditions are fulfilled. The ope ration from LPBS is envisaged to facilita te trial run commissioning only, Hence, rocess permissive are not provided at MCC during trial mode of opera tion for bidirec tional drives. () While for ON-OFF duty Bidi rectional Drives, Open, Clos positions will be decided by Limit Switches and for inching dut drives additionally Position transmitter contact less or (LVDT , 2 Wire type) shall be provided with each drive for position feedb ack Information throughout the travel. () Following potential free signal exchange shall take place etween MCC & PLC. Valve Open and Close Command (2 DO) MCC Disturbance (Thermal overload/local/MCC not in service /sw itch fuse off) MCC selected for local operation (/ in Trial). MCC Run/ON feedback 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, Al