Technical Specifications DC input 24‑250 V wide range. Multi‑group stabilized DC output for rack internal modules. Rated output power 30 W. Operating temperature ‑25 ℃ to +70 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel IP30, rear connector area IP20. Complies with CE and IEC power supply for secondary equipment standards.
Functional Features Provides stable multi‑channel DC power supply for all modules in protection rack. Built‑in over‑voltage, over‑current and short‑circuit protection function. Front‑panel LED indicates power‑supply normal status. Realizes power‑supply fault alarm signal output.
Application Scenarios Mounted in substation protection relay rack. Used as central power supply unit for traditional plug‑in protection system. Applied for power plant and substation secondary protection system, spare‑part replacement and renovation projects.
Working Principle External DC power accesses module input terminal. Internal switch‑mode power‑supply circuit completes voltage conversion and stabilization. Multi‑group stable DC power outputs to rack back‑plane bus for power supply of other plug‑in modules. When abnormal condition occurs, internal protection circuit acts to protect rear‑stage modules, meanwhile trigger fault alarm.
Performance Parameters Output voltage stability satisfies protection module working requirement. Protection action triggers when over‑voltage, over‑current and short‑circuit happen. Power‑supply fault outputs definite alarm signal.
Installation Requirements Insert module into designated slot of standard relay rack and tighten locking screw. Connect input DC power strictly within rated range. Guarantee reliable protective grounding of rack. Check front‑panel power‑on LED status after power‑on.
Usage Notes Disconnect input power before plug‑in and pull‑out operation. Do not exceed module rated output power. Periodically inspect input terminal tightening condition. Prevent dust accumulation inside module. Replace power‑supply module according to equipment maintenance cycle.
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