These kind of panels are the same as the fixed ones in general features. But, technically they are between the fixed panels and withdrawable ones. In summery, the priority of these panels over the fixed ones are as follows:

In modular type, each feeder is located in a separate metal module. It is possible to use a lot of feeders in one cell as a result of the equipment arrangement. The module incoming and outgoing are installed through the bus bar and from the both sides. Only the door of the module can be opened or closed that its relevant feeder is working and there is no need to interrupt the power supply of panel or other modules, also in the case of fire danger, there is no possibility of fire breaking out to the next modules. The other modules are protected completely till solving the problem.