45/51 My first impression was that these were not three bars, but rather it was a paint spill. In any case, we'd prefer the font to be the same/similar to the existing NECEC logo. We'd also prefer the bars to be obviously similar to the NECEC logo's bars. Probably not centered over the logo.
53 Is too dissimilar to the NECEC design language (font) although I like the concept and how you've laid out - the line isolating the words from the design element is nicely distinct. 52 has same feedback as 45/51