IG-245-EN version 05; 13/02/2020
3
General Instructions
mb
.m
Contents
Contents
1. Description and main characteristics .......................4
1.1.
Elements of the
mb
.m . . . . . . . . . . . . . . . . . . . . . . .4
1.1.1. Medium voltage switchgear . . . . . . . . . . . . . . . . . .6
1.1.2. Power transformer . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.1.3. Low voltage switchgear . . . . . . . . . . . . . . . . . . . . . .7
1.1.4. Metal frame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.2.
Name plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.3.
Mechanical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.3.1. Dimensions and weight of
mb
.m for
transformer power below 2500 kVA. . . . . . . . . . .8
1.3.2. Dimensions and weight of
mb
.m for
transformer power equal to or above
2500 kVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
1.3.3. Dimensions and weight of
mb
.m with low
voltage outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2. Transport ..................................................................17
2.1.
Location of accessories during transport. . . . .17
2.2.
Road haulage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.2.1. Transport agents. . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.2.2. Selecting the route for road transport . . . . . . .18
2.2.3. Checking impact detectors. . . . . . . . . . . . . . . . . .18
2.2.4. Responsibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.2.5. Packing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.3.
Sea transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3. Storage ......................................................................20
4. Normal service conditions .......................................21
5. Installation ...............................................................22
5.1.
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5.2.
Planning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
5.3.
Preparing the ground . . . . . . . . . . . . . . . . . . . . . . .24
5.4.
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
5.4.1. Handling the
mb
.m . . . . . . . . . . . . . . . . . . . . . . . . .28
5.4.2. Removing from an HC-type sea container. . . .29
5.5.
Cable access and sealing . . . . . . . . . . . . . . . . . . . .32
5.6.
Door adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . .34
5.7.
Earthing circuit connection. . . . . . . . . . . . . . . . . .35
5.7.1. Recommended exterior protective earth
network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
5.8.
Replacing the electrical equipment . . . . . . . . . .36
5.8.1. Replacing the medium voltage switchgear. . .36
5.8.2. Replacing the transformer unit . . . . . . . . . . . . . .37
5.8.3. Access to the transformer site . . . . . . . . . . . . . . .37
5.8.4. Transformer secondary connection . . . . . . . . . .39
6. Recommended sequence of operations .................40
7. Maintenance .............................................................40
8. Annex: recommended tightening torques ............41
