An admin buyer's practical guide on testing circuit breakers without power, emphasizing prevention over cure. Covers GE Multilin 845 relays, transformer protection, and oil filter types. [...]
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One GE engineer shares the exact protection relay and transformer blunders he made (and how you can avoid them). [...]
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GE transformer buyer's roundup — The myth that "a transformer is a transformer" still kills maintenance-light panel budgets. [...]
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GE transformer buyer's roundup — You’re evaluating a 150 kVA dry-type transformer for a continuous process load. The datasheet shows 98.2% efficiency and a price tag. [...]
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GE transformer buyer's roundup — Every plant electrician I’ve talked to has the same story: they sized a dry-type transformer by kVA, connected a non-linear load, and within two years the winding insulation was cooked. [...]
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GE transformer buyer's roundup — You just ordered a 150 kVA transformer. The nameplate says 97.8% efficient. By the time it’s installed, it sees 40% load, the secondary voltage sags under tap, and the core losses are running 24/7. [...]
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GE transformer buyer's roundup — You sized a 75 kVA dry-type for a factory expansion. Now production added a second shift. The motor loads, heating, all of it—nameplate demand just went from ~48 kW to ~96 kW. [...]
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GE transformer buyer's roundup — Myth you hear on job sites: “A transformer is a transformer—as long as the kVA matches, it’ll handle generator feed just fine.” Reality: A generator’s voltage waveform is typically noisier (higher harmonic… [...]
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GE transformer buyer's roundup — Your shelter's AC unit is undersized. The transformer sits in the same enclosure, and every watt it sheds as heat must be removed by that already-marginal cooling. [...]
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GE transformer buyer's roundup — Every facility manager I talk to starts with the same assumption: buy a transformer rated for my load, and it’ll handle the load. That’s true only if the load behaves like a perfect resistor. [...]
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