Cart Remove item Thumbnail image Product Price Quantity Subtotal × IEC 61850 in Practice: Step by Step Implementation in Real-World Digital Substations 28.45 $ IEC 61850 in Practice: Step by Step Implementation in Real-World Digital Substations quantity - + 28.45 $ Coupon: Apply coupon Update cart Cart totals Subtotal 28.45 $ Total 28.45 $ Proceed to checkout