Hitachi ABB Power Grids is a 3-dimensional company, which means, you will have a hiring manager (direct boss) who manages a local team and a "dotted line" to another supervisor who manages the product/service line you represent. This means, you will likely interview with 5-7 people. They could be folks from the product line, technical engineers, sales-people who sell your service/product, your hiring manager, managers of the business development group -- anyone who may 'touch' your role in some way.
Thankfully, the entire process is well-structured and will have an onboarding coordinator and HR recruiter to guide you along the way. People will be familiar with the role for which you are applying and will have questions ready before-hand. Hitachi ABB is a large engineering company so they have processes for everything -- good if you like structure, but the bureaucracy can be trying at times.
The people that work at Hitachi ABB are of the highest pedigree. They're accomplished, smart, and overall good people to speak with.