FTG-12R/T125-50 Indoor High-Voltage AC Vacuum Load Switch

FTG-12R/T125-50 indoor high-voltage AC vacuum load switch—fuse-combination unit (hereinafter referred to as combination unit) is a three-phase AC 50 Hz indoor switchgear with rated voltage 12kV.
The product operating mechanism is designed into an integrated structure. The operating mechanism and the primary circuit are arranged at front and back. With withdrawable design, the combination unit can be pulled out from the cabinet when troubleshooting and replacement of high-voltage fuse.

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FTG-12R T125-50.pdf

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Working environment conditions:

1.1 Ambient temperature: Max. temperature is +40℃, Min. temperature is -15℃ (storage and transport at -30℃ are allowed).

1.2 Relative humidity: The daily mean is not greater than 95%, and the monthly mean is not greater than 90%; the daily average vapor pressure is ≤2.2 kPa, and the monthly average vapor pressure is ≤1.8 kPa;

1.3 Altitude: Not exceed 1,000 m.

1.4 Seismic intensity should not exceed 8 magnitude scales.

1.5 There is no obvious pollutions such as dust, smoke, corrosive gas, flammable gas, steam gas, or salt spray in the ambient air.

1.6 The magnitude of the electromagnetic interference induced in the secondary system does not exceed 1.6kV. Note: Please contact the manufacturer if the product works out of the normal working condition range.

No.	Name	Unit	Parameter
1	Distance between open contacts	mm	9±1
2	Contact overtravel	mm	3.5±0.5
3	Contact closing bounce time	ms	≤ 2
4	Average closing speed	ms	0.4 ~ 0.8
5	Average opening speed	m/s	0.9 ~ 1.3
6	Closing time	ms	30 ~ 70
7	Opening time	ms	20 ~ 50
8	Closing asynchronous	ms	≤ 2
9	Opening asynchronous	ms	≤ 2
10	Main circuit resistance	μΩ	≤ 250
11	Center distance between phases	mm	210
12	Allowable cumulative wear thickness for moving and fixed contacts	mm	3

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