Combination of a panel for accommodating a draw-out device, such as a vacuum circuit breaker or metering device, and such a draw-out device, which panel comprises: - a housing with an access opening for accommodating a draw-out device and with primary plugs and secondary plugs for the draw-out device to connect to; - a traveling system arranged in the housing for positioning the draw-out device within the housing in a connected position, a service position and a disconnected position; - a door arranged to the housing movable between a closed position for closing the access opening of the housing and an open position for providing access to the housing; and - primary blocking means for blocking the movement of the traveling system from the disconnected position to the service position with the door in the open position or between the open position and the closed position; the combination comprising: - secondary blocking means for blocking the door to move into the closed position with the draw-out device being disconnected from the secondary plugs, and wherein the secondary blocking means comprise: - a cover plate slidably arranged to the housing between a cover position covering at least partially the secondary plugs and a release position releasing the secondary plugs for connection with a plug of the draw-out device; - a blocking pin movably arranged between a blocking position blocking closure of the door and a pass position for allowing the door to close when the draw-out device is in the disconnected position, wherein the movement of the cover plate is coupled to the blocking pin, such that the blocking pin is in the blocking position with the cover plate in the cover position and such that the blocking pin is in the pass position with the cover plate in the release position; wherein the blocking pin is provided on a lever pivotably arranged on the draw-out device around a pivot point, wherein furthermore a guide roller is arranged on the lever and wherein the cover plate comprises a guide track for cooperation with the guide roller; and wherein a spring is arranged on the lever for urging the guide roller in contact with the guide track. - a housing with an access opening for accommodating a draw-out device and with primary plugs and secondary plugs for the draw-out device to connect to; - a traveling system arranged in the housing for positioning the draw-out device within the housing in a connected position, a service position and a disconnected position; - a door arranged to the housing movable between a closed position for closing the access opening of the housing and an open position for providing access to the housing; and - primary blocking means for blocking the movement of the traveling system from the disconnected position to the service position with the door in the open position or between the open position and the closed position; - secondary blocking means for blocking the door to move into the closed position with the draw-out device being disconnected from the secondary plugs, and wherein the secondary blocking means comprise: - a cover plate slidably arranged to the housing between a cover position covering at least partially the secondary plugs and a release position releasing the secondary plugs for connection with a plug of the draw-out device; - a blocking pin movably arranged between a blocking position blocking closure of the door and a pass position for allowing the door to close when the draw-out device is in the disconnected position, - a cover plate slidably arranged to the housing between a cover position covering at least partially the secondary plugs and a release position releasing the secondary plugs for connection with a plug of the draw-out device; - a blocking pin movably arranged between a blocking position blocking closure of the door and a pass position for allowing the door to close when the draw-out device is in the disconnected position,