Transformer holding device (10, 40) for an electric locomotive having a transformer, comprising: - at least one transformer support (11, 12, 13, 14, 42, 43, 44) which is designed to the effect - that the transformer can be displaced on an underframe of the electric locomotive in a maintenance operation in order to achieve a predetermined center of gravity position of the electric locomotive, - and the transformer is fixed to the underframe of the electric locomotive during operation, - in which the at least one transformer support (11, 12, 13, 14, 42, 43, 44) comprises: - at least one holder (12, 42) which can be fastened to a locomotive longitudinal member or a locomotive crossmember of the electric locomotive, - a transformer claw (14, 44) which can be arranged between the transformer and the holder (12, 42) and can be displaced relative to the holder (12, 42) in the longitudinal direction and in the transverse direction during a maintenance operation, characterized - in that an intermediate element (13, 43) is arranged between the holder (12, 42) and the transformer claw (14, 44) and is designed in such a way that the transformer claw can be displaced relative to the holder (12, 42) in the longitudinal direction and in the transverse direction in a maintenance operation, - in that the intermediate element comprises a clampable dovetail fixing, and - in that the clampable dovetail fixing comprises at least two dovetail elements (43a, 43b) which are displaceable in different directions with respect to one another. - at least one transformer support (11, 12, 13, 14, 42, 43, 44) which is designed to the effect - that the transformer can be displaced on an underframe of the electric locomotive in a maintenance operation in order to achieve a predetermined center of gravity position of the electric locomotive, - and the transformer is fixed to the underframe of the electric locomotive during operation, - in which the at least one transformer support (11, 12, 13, 14, 42, 43, 44) comprises: - at least one holder (12, 42) which can be fastened to a locomotive longitudinal member or a locomotive crossmember of the electric locomotive, - a transformer claw (14, 44) which can be arranged between the transformer and the holder (12, 42) and can be displaced relative to the holder (12, 42) in the longitudinal direction and in the transverse direction during a maintenance operation, characterized - in that an intermediate element (13, 43) is arranged between the holder (12, 42) and the transformer claw (14, 44) and is designed in such a way that the transformer claw can be displaced relative to the holder (12, 42) in the longitudinal direction and in the transverse direction in a maintenance operation, - in that the intermediate element comprises a clampable dovetail fixing, and - in that the clampable dovetail fixing comprises at least two dovetail elements (43a, 43b) which are displaceable in different directions with respect to one another. - that the transformer can be displaced on an underframe of the electric locomotive in a maintenance operation in order to achieve a predetermined center of gravity position of the electric locomotive, - and the transformer is fixed to the underframe of the electric locomotive during operation, - in which the at least one transformer support (11, 12, 13, 14, 42, 43, 44) comprises: - at least one holder (12, 42) which can be fastened to a locomotive longitudinal member or a locomotive crossmember of the electric locomotive, - a transformer claw (14, 44) which can be arranged between the transformer and the holder (12, 42) and can be displaced relative to the holder (12, 42) in the longitudinal direction and in the transverse direction during a maintenance operation, characterized - at least one holder (12, 42) which can be fastened to a locomotive longitudinal member or a locomotive crossmember of the electric locomotive, - a transformer claw (14, 44) which can be arranged between the transformer and the holder (12, 42) and can be displaced relative to the holder (12, 42) in the longitudinal direction and in the transverse direction during a maintenance operation, - in that an intermediate element (13, 43) is arranged between the holder (12, 42) and the transformer claw (14, 44) and is designed in such a way that the transformer claw can be displaced relative to the holder (12, 42) in the longitudinal direction and in the transverse direction in a maintenance operation, - in that the intermediate element comprises a clampable dovetail fixing, and - in that the clampable dovetail fixing comprises at least two dovetail elements (43a, 43b) which are displaceable in different directions with respect to one another.