Technical Specifications Multi‑pole test switch, CT automatic short‑circuit self‑locking mechanism. Rated current 5 A, rated voltage 250 V AC/DC. Mechanical operation life 20000 cycles. 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 secondary circuit test component standards.
Functional Features Realizes safe isolation between protection equipment and CT/VT secondary loop. Built‑in reliable CT automatic short‑circuit function eliminates open‑circuit risk. Provides test access terminal for external test equipment. Front‑panel handle realizes position switching with obvious mechanical state indication. Supports multi‑loop simultaneous switching operation.
Application Scenarios Mounted in power plant and substation protection relay rack. Applied for commissioning, periodic test and maintenance work of numerical and traditional protection devices.
Performance Parameters Switch contact maintains low contact resistance. CT short‑circuit mechanism acts accurately every time. Mechanical position mark is clear and reliable. Service life meets long‑term repeated operation requirement.
Installation Requirements Insert module into standard relay rack slot and tighten locking screw. Check back‑plane connector contact integrity. Verify mechanical position indication after installation. Complete relevant safety technical measures before on‑site operation. Ensure rack protective grounding is reliable.
Usage Notes Follow power secondary safety operation specification during operation. Do not apply violent force to operation handle. Periodically verify CT short‑circuit function in maintenance cycle. Avoid mechanical shock and dust accumulation. Confirm switch position before protection device putting‑into‑service.
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