MR VACUTAP VMS - Page 4

Table of contents
Maschinenfabrik Reinhausen GmbH 20204 5993419/02 ENVACUTAP
®
VMS
®
5 Operation........................................................................................................................... 38
5.1 Operating the motor-drive unit with the hand crank.......................................................................... 38
6 Fault elimination ............................................................................................................... 40
6.1 Tripping the protective relay and re-commissioning the transformer................................................ 42
6.1.1 Flap valve in OPERATION position ....................................................................................................................43
6.1.2 Flap valve in OFF position ..................................................................................................................................43
6.1.3 Re-commissioning the transformer .....................................................................................................................43
6.2 Tripping the pressure monitoring device and putting the transformer back into operation............... 44
6.2.1 Sensor in the OPERATION position ...................................................................................................................44
6.2.2 Sensor in the OFF position .................................................................................................................................44
6.2.3 Re-commissioning the transformer .....................................................................................................................45
7 Maintenance...................................................................................................................... 46
7.1 Inspection ......................................................................................................................................... 47
7.2 Maintenance intervals....................................................................................................................... 48
7.3 Changing the insulation fluid............................................................................................................. 50
7.3.1 Moving on-load tap-changer to adjustment position ...........................................................................................50
7.3.2 Removing horizontal drive shaft..........................................................................................................................50
7.3.3 Emptying the oil compartment and oil conservator .............................................................................................52
7.3.4 Filling the oil compartment and oil conservator with fresh insulating fluid...........................................................54
7.3.5 Installing horizontal drive shaft............................................................................................................................56
7.3.6 Centering on-load tap-changer and motor-drive unit ..........................................................................................57
7.4 Performing DC resistance measurement on transformer ................................................................. 57
8 Technical data................................................................................................................... 59
8.1 Technical data for on-load tap-changer ............................................................................................ 59
8.1.1 On-load tap-changer properties ..........................................................................................................................59
8.1.2 Permissible ambient conditions...........................................................................................................................59
8.2 Technical data for protective relay.................................................................................................... 60
8.3 Special models of protective relay .................................................................................................... 62
8.3.1 Protective relay with CO change-over contact as tripping switch .......................................................................62
8.3.2 Protective relay with several dry-reed magnetic switches...................................................................................63
8.4 Technical data for pressure monitoring device ................................................................................. 63
8.5 Limit values for dielectric strength and water content of insulating fluids ......................................... 65