TR FI ES M GM MK TN EG IQ SY S E YE M S TYPE MHM
GENERL SPECIFICTION These tap changers are available in one, two or three phase applications. Multi layer types are also available. The shaft length is fixed as 91 and 11mm. Driving mechanism can be either on the edge or in the middle the phases. Connection diagrams in page MHM 2 can be applied in any variation to all types. These tap changers are bolted together with supports, under transformer cover and allow strong construction. MTERILS Steel Parts : These parts can be stainless or mild steel. Mild steel parts are cadmium or zinc plated. Upon request galvanizing is also available. luminum Parts : GISi12Cu rass Parts : CuN0Pb2 Ms 0 F DIN 1 Copper Parts : E-Cu F2 DIN 000 Insulator Parts : Paper phenol-plastic resin based laminates, HP 1. DIN. SSEMLY notch is provided to mark each position. For operation, the notch must be released by applying an axial pull on the control knob. Once the knob is in the desired position it will drop into the respective space by the help a high tension spring.this process is clearly marked on control knob as; LIFT TURN SWITCH ON This description can be engraved in any language. ON REQUEST The aluminum parts can be protected by anodic oxidation. The mild steel parts can be supplied in stainless steel. The brass and copper parts can be tin or silver plated. CURRENT 0 1 CURRENT CONTCT INNER DI. (For cable connection) Ø.1 mm. Ø.1 mm. Ø 8.1 mm. Other.I.L. values are also available upon customer request. VOLTGE CLSS VOLTGE CLSS.I.L 10 1 9 0 10 1
Connection Diagrams setting for delta transformer setting for star transformer Typical combination: -1 stage, series - parallel coupling -2 stages, delta diagram - setting ± 2,%. seris - parallel coupling 2
Off-circuit operation can be used in oil Delta diagram -0 0- - positions Setting 2.% per position 0 Ø2 L 2 X 2 10 ± 9 9 1 F F F I F F F G F F F E D D E F G I 0 J:.1. K: J:.1. K: L=91 L=11 L=91 L=11 X=8 X=1 X=8 X=1 0 0 8 1 89 8 1 8 919 1 9 9 81 8 0 12 2 9 11 1 1 2 9 11 1 1 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D D D D D D D D D D D D D D D D D D D D D
Off-circuit operation can be used in oil Delta diagram -0 0- - positions Setting 2.% per position Ø2 9 9 L 12 0 1 1 C F F F G F F F G F F F E D C D E F G 0 J:.1. K: L=91 L=11 J:.1. K: L=91 L=11 0 9 8 01 8 89 9 10 9 2 0 8 1 11 800 8 11 11 11 11 11 2 9 11 1 1 2 9 11 1 1 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 12D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D
Off-circuit operation can be used in oil Delta diagram -0 0- - positions Setting 2.% per position 0 X Ø2 2 L 2 10 ± 9 9 1 F F F C E F F F I F F F 1 C E F I 0 J:.1. K: J:.1. K: L=91 L=11 L=91 L=11 X=8 X=1 X=8 X=1 0 1 2 9 19 8 89 2 81 22 22 22 28 29 2 2 2 29 1 10 10 1 1 10 1 118 9 12 111 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D D D D D D D D D D D D D D D D D D D D D
Off-circuit operation can be used in oil Delta diagram -0 0- - positions Setting 2.% per position 0 X Ø2 2 2 L 10 ± 9 9 F F I F F F F F E D D E F I 0 J:.1. K: L=91 L=11 J:.1. K: L=91 L=11 0 1 2 09 1 98 82 0 2 298 0 82 2 29 9 81 2 2 9 11 1 1 2 9 11 1 1 0 0 0 0 0 0 0 0 0 0 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S 2S S S S S S S S S S S S S S S S S S S S S
Off-circuit operation can be used in oil Delta diagram -0 1 - positions Setting 2.% per position 0 Ø2 X 2 0 L 11 29 10 ± 101 1 2 1 F F F I F F F G F F F E D 0 Current 1 1 D E F 8 99 811 8 899 0 9 2 8 11 12 8 11 12 10 10 10 G 1 1 1 9 9 9 I 1 1 1 9 9 9 1 J:8.1. K:12 L=91 L=11 X=8 X=1 D D D D D D D D D D D D
Off-circuit operation can be used in oil Delta diagram -0 1 - positions Setting 2.% per position Ø2 2 L 101 1 12 1 0 18 C F F F G F F F G F F F E D 1 2 Current C D E F G L=91 1 J:8.1. K:12 L=11 0 1 1 0 82 89 98 910 1022 0 9 8 82 82 82 82 122 122 122 8 11 12 8 11 12 10 10 10 1 1 1 9 9 9 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 1D 8
Off-circuit operation can be used in oil Delta diagram -0 1 - positions Setting 2.% per position 0 Ø2 X L 2 0 11 29 10 ± 101 1 2 1 F F F C E F F F I F F F 1 0 Current 1 1 C E F 0 1 2 809 9 2 2 21 9 1 10 10 10 10 10 10 I 1 1 1 9 9 9 1 J:8.1. K:12 L=91 L=11 L=8 L=1 D D D D D D D D D D D D 9
Off-circuit operation can be used in oil Delta diagram -0 1 - positions Setting 2.% per position Ø2 101 L 1 2 12 0 1 F F F E E F F F C C F F F 1 1 1 2 0 Current 1 1 C E F 0 1 98 8 98 2 12 92 82 82 82 122 122 122 10 10 10 1 J:8.1. K:12 L=91 L=11 L=8 L=1 D D D D D D D D D D D D 10
Off-circuit operation can be used in oil Series paralel coupling -0 1 Ø2 1 101 2 L 1 12 0 1 F F F F E E F F F F C C F F F F 1 1 2 Current C E F 1 J:8.1. K:12 L=91 1 J:8.1. K:12 L=11 10-882 0 82 2 108 P2 P2 1 2-0 112 8 122 10 9 12 P2 P2 11
Off-circuit operation can be used in oil askarel 1.series-parallel coupling 10-1 2.delta setting -0 1.Setting 2.% per position Ø2 Ø2 2 1 2 2 L 1 2 2 2 101 1 F F F F C C F F F F C C F F F F 1 1 12 0 101 1 F F F C E F F F E C F F F 2 1 1 Series Parallel Delta 1 2 C E F L=91 1 J:8.1. K:12 L=11 10-2-0 0 898 112 0 8 2 918 9 100 8 10 12 118 10 18 12 18 2 9 108 12 K K K K K K K K K K K K 12
CONTROL DEVICES CONTROL DEVICE CONTROL DEVICE 100 Ø0 max.10 91 Ø2 H12 91 or 11 Ø2 H12 91 or 11, max.10, 1
NUMERING 1 2 1 1 1 2 1
COMINTIONS ll type MHM tap changers can be paired by superimposing several tap changers whose purpose-buit steel brackets are assembled by nuts and bolts. Depending on the diagram adopted, the user can: *either operate the tap changers with one shaft *or operate part the tap changes with one shaft, and the other part with another If doing so, specify the positions the coupling taps shaft and the position the setting taps shaft. Note:It is essential, when ordering, to quote dimension W the minimum which to be set in each case depens on the insulation conditions and on the position the different tap changers. WHEN ORDERING PLESE QUOTE: 1-The changer unit no. 2-The voltage current and type setting or coupling. -Control device no. -The language on the control device. - positions. -The indication the repeater disc (1,1) -Dimensions the fixed contacts (J and K) 8-L,e,X,W dimensions from the tables. For special setups not shown in the catalogue plaese consult us. W (min 2) 1