ETOS MD-IV Operation Sequence PDF

ETOS® MD-IV. Switching sequence © MR 01/30/2025 | RM-SOR E. Espitia Agenda 1. RM motor drive evolution 2. Switching sequence motor circuit 3. Switching sequence control circuit Jan 30, 2025 | 2 1. RM motor drive evolution Jan 3...

ETOS® MD-IV. Switching sequence © MR 01/30/2025 | RM-SOR E. Espitia Agenda 1. RM motor drive evolution 2. Switching sequence motor circuit 3. Switching sequence control circuit Jan 30, 2025 | 2 1. RM motor drive evolution Jan 30, 2025 | 3 Motor drive evolution MD-III (2014) MD-IV (2024) - Modular construction - No mechanical shaft needed - Safety circuit (self diagnostic of MD-II (2005) electrical control devices) - Communications (SCADA) - Control functions - Complete drive - OLTC drive - with electrical control devices - AVR - with controller in-house - Cooling control - VIM with self-monitoring function - Monitoring functions MD-I (1990) - Transformer temperature - OLTC monitoring - Motor drive function - DGA - with mechanical control devices - VAM - w/o electrical control devices - BM - VIM (Vacuum Interrupter 01/30/2025 | 4 Monitoring MD-III vs MD-IV. Motor MD-III + Motor circuit (single phase) + Heater (permanently connected) 01/30/2025 | 5 MD-III vs MD-IV. Motor MD-IV + Motor circuit (three phase) + Heater (thermostatically controlled) + Verification switches (186, 187) 01/30/2025 | 6 MD-III vs MD-IV. VIM MD-III + VIM circuit (86X) + Runback circuit (86XA) + Verification switches (186, 187) 01/30/2025 | 7 MD-III vs MD-IV. VIM MD-IV + VIM circuit (86X) + Runback circuit (86XA) + Brake circuit (88) 01/30/2025 | 8 MD-III vs MD-IV. Control MD-III + Brake circuit (88) + Control circuit + Without step-by-step circuit (continuous operation) 01/30/2025 | 9 MD-III vs MD-IV. Control MD-IV + Control circuit + Without step-by-step circuit (continuous operation) 01/30/2025 | 10 MD-III vs MD-IV. Signalling MD-III + Signals 01/30/2025 | 11 MD-III vs MD-IV. Signalling MD-IV + Signals - On terminals 01/30/2025 | 12 MD-III vs MD-IV. Signalling MD-IV + Signals - Outputs on ISM modules 01/30/2025 | 13 MD-III vs MD-IV. Signalling MD-IV + Signals - Inputs on ISM modules 01/30/2025 | 14 MD-III vs MD-IV. Signalling MD-III + Position Signals 01/30/2025 | 15 MD-III vs MD-IV. Signalling MD-IV + Position Signals 01/30/2025 | 16 2. Switching sequence Control circuit Jan 30, 2025 | 17 Direction impulse direct to DI |  after the ism check DO running direction closes 84L contactor closes Motor is not starting! Break contactor will start the operation thru ISM |  84L goes to electrical self- sealing DO last direction closes Motor starts running S13 operates after 2 sections (of 33) |  auxiliary contactor 84Z closes thru cam S13 -> mechanical sealing |  84L is held thru running cam S13 |  Cam S13 switches back at the end of operation (section 31 of 33) |  84L opens -> motor stops |  84Z opens -> ready for next operation | 3. Switching sequence Motor circuit Jan 30, 2025 | 26  Phase shift capacitor Starting capacitor Run back contactor-VIM lockout Raise / Lower contactors Brake contactor Brake & start circuit 3PH Motor  ISM DO  operating capacitor Starting capacitor  200ms  Ready for next operation