YUCT1-B Automatic Transfer Switch for Bypass Operation

The YUCT1‑B automatic transfer switch is designed for emergency power supply systems operating at an AC rated voltage of 415 V or less, with a rated frequency of 50/60 Hz and a rated current ranging from 800 A to 3200 A. It enables automatic switching between two power sources. Before the transfer switch is withdrawn for inspection, testing, or maintenance, the load can be temporarily supplied by the bypass switch on the same side as the primary source. During such operations, the load remains energized, ensuring uninterrupted power supply. This makes the device particularly suitable for applications such as hospitals, data and financial centers, high‑tech enterprises, and telecommunications stations.

YECT1-1250~4000G PC‑class transfer switchgear

A dedicated three‑pole automatic transfer switch that, upon receiving a transfer signal, can immediately (or after a pre‑set time delay) switch from one power source to another, or to an intermediate disconnect position isolated from all power sources. It features a split‑type, PC‑class design, fixed mounting, and rear horizontal wiring. Application category: AC‑33B. Rated operating current: 800–5,000 A; contact switching time: ≤100 ms. Suitable for distribution systems with a rated voltage of AC 400 V. Widely used in fire‑protection, postal and telecommunications facilities, hospitals, hotels, urban rail transit, and similar applications.

YES2-63~800GN1/GA/GA1 PC‑class transfer switch appliance

This series of PC‑class transfer switches is suitable for AC rated voltages up to 400 V and rated currents from 16 to 800 A. They feature automatic switching functions for undervoltage, overvoltage, and phase loss (the GN1 model provides undervoltage and phase‑loss switching, while the GA1 model offers phase‑loss switching on phases C and N). The main circuit employs a double‑break, cross‑pull design, ensuring reliable make‑and‑break performance. Compliant with isolation switch standards, these devices provide clear on/off position indicators and lockable safety features, reliably achieving the required open‑position status for fire‑alarm interlock applications. They also support emergency manual operation, electric actuation, and emergency disconnect in automatic control mode, as well as automated control functions.