Load Break Switch Indoor High voltage disconnector ( LBS )

1.Load break switch for Indoor install 2. IEC 62271Standard 3. ISO 9001:2008

Summary

FN12 is a three-phase H.V switch equipment, which is used for 12KV 50Hz for breaking and switching load current, no-load transformer cable charging current and closing short-circuit current. The load switch with earth switch can switch short-circuit current.

FN12-12DR Load Break Switch-Fuse Combination is made up of FN12-12D load switch and S[]LAJ-12(XRNT[]-10) H.V current limiting Fuse. This switch can break any current till short-circuit current.  Because of the striker of the fuse, the switch can switch off automatically.

Application

It is used for the ring main units and industrial equipment of 12KV and three-phase AC 50Hz to control load and short-circuit current. Because the switch-fuse combination protects transformer equipment more reliably than circuit breaker .It is especially suitable for ring main units, radial distribution and combined transformers.

Standard

a,GB3804-90<3~65KV AC H.V Load switch>

b,GB16926-1997<High-voltage alternating current switch-fuse combinations>(eqv. IEC62271-2002)

c,GB1995-89<AC H.V isolate switch and earth switch>

Techniacl parameter and performances(please see the table)

No.  Description  Unit FN12-12D/630 FN12-12D(R)D/100 1 Rated voltage KV 12 2 Rated frequency Hz 50 3 Rated current A 630 100 4 Lighting impulse resisting voltage KV To earth and between poles 75/ across isolating distance 85 5 1min power frequency withstand voltage KV To earth and between poles 42/ across isolating distance 48 6 Rated short time withstand current KA 20(4S) 7 Rated Peak Withstand Current KA 50 8 Rated closing current(peak) KA 50 50 9 Rated short-circuit breaking current (prospective value) KA   31.5 10 Max. critical breaking current I2·t A2S   fuse characteristic curve 11 Min. Breaking current KA   fuse characteristic curve 12 Rated transfer current KA   1.5 13 Max. breaking current(reference value) KA 1.8 14 Braking no-load transformer capacity kva 1250 15 Rated cable charging current A 10 16 Rated power load current breaking times time ≥100 17 Switch-off time of rated power load current switch on-and-off S   >0.06 18 Rated transfer current KA 20(2S) 20(2S) 19 Rated transfer current KA 50 50 20 Motor operating power voltage V 110,220 DC/AC

Operation handle

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