Customer Query on Semi EOT crane for ASH system A/c Dr.NTTPS
1. Any IS STD reference which quotes semi EOT is a mix of electrical operation (motor operated) & mechanical operated (chain pulley block), If any. Plz share the same.
Reply : Please note that EOT Crane is a fully customised product based on the application, no. of operation, type of loading, atmospheric requirement, utilisation, required life hours etc.
Crane have majorly 3 motions & if any motion out of 3 is manual than crane will be Semi EOT Crane. Based on the required pulling effort, any motion can be selected manual subjected to a man pull 250N continuously & 350N for a short period. In general Traverse motions required less pulling effort hence
Cross travel & Long travel motions preferred worldwide for manual operation subjected to a man pull 250N continuously & 350N for a short period.
However for the lower rated load hoisting also can be selected for manual operation.
IS:3177 & IS: 3938 will be applicable for the relevant integral items selection & design.
2. What is the limitation in semi EOT to go with electrical driven movement. (Min/Max span) for e.g if the span is above 10m we are going ahead with electrical operation likewise is there any limitation for long travel?
Reply : Any motion can be selected for manual operation subjected to a man pull 250N continuously & 350N for a short period.
3. Customer requires (wishing) motor drive for long travel.
Reply : Can be offered with additional price for relevant changes(cost difference is very small). However if the operational requirement is not continuous & Crane Capacity is upto 10T subjected to Crane Span max. upto 12M manual operation can be selected.