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40.5KV Remote Control Indoor Vacuum Load Break Switch

Categories Transmission Line Insulator
Brand Name: Suntech
Model Number: FZ(R)N21-40.5
Certification: ISO
Place of Origin: Ningbo,China
MOQ: 1 Set
Price: Negotiation
Payment Terms: L/C, T/T, Western Union, MoneyGram
Supply Ability: 6000pcs per month
Delivery Time: 25-30 days after Payment
Packaging Details: Exporting Cases
Name: Alternating-Current Load Switch
Altitude: Under 1000M
Ambient Temperature: -40℃-+40℃
Usage: Electrical Site
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40.5KV Remote Control Indoor Vacuum Load Break Switch

40.5KV Remote Control High Voltage AC Indoor Vacuum Load Break Switch


FZ(R)N21-40.5D indoor high-voltage ac vacuum load switch-fuse combination ( "combination" for short) is used in power systems with an AC frequency of 50 Hz and a rated voltage of 40.5 kV to break load currents, overload currents and short-circuit currents. It particularly applies to the places needing control, protection for oilfree, maintenance-free, frequently-operated and ring network power supply units and terminal power supply transformers.

The combination is characterized by large breaking capacity, high safety and stability, long electrical life, support for frequent operation, less maintenance, etc. It has an apparent isolating gap, an earthing switch with making capability, an electric spring actuator and remote control capability.



1.1 Technical parameters

ltemUnitReference value
Rated voltagekV40.5
Rated frequencyHz50
Rated maximum current of the fuseA63
Insulation level1min power-frequency withstand voltagekVVacuum gap, interpole, pole-to-ground: 95; isolating gap: 110
Lightning impulse withstand voltagekVVacuum gap, interpole, pole-to-ground: 185; isolating gap: 215
Rated peak withstand currentkA50
4s rated short-time withstand currentkA20
Rated breaking current of the active loadA1250
Rated closed-loop breaking currentA1250
Rated breaking current of cable during chargeA21
Rated short-circuit breaking currentkA31.5
Rated transfer currentA1200
Fuse modelXRNT3A-40.5/Δ-31.5
Output energy of the fuse strikerJ2-5
Rated short-circuit making currentkA80(expected peak value)
Rated peak withstand current of the earthing switchkA50
4s rated short-time withstand current of the earthing switchkA20
Rated voltage (DC or AC) of the auxiliary circuitV220;110
Mechanical lifeCycles10000

1.2 Technical parameters of the vacuum load switch

ItemUnitReference value
Gap of contactsmm17±1
Compression travel of the contact springmm4±1
Average making speedm/s0.6±0.2
Average breaking speed(gap: 6mm)m/s1.5±0.2
Breaking timems≤60
Non-synchronous making/breaking of contacts of the three phasesms≤2
Bounce time in contact makingms≤3
Distance between live parts and phase-to-ground distancemm≥300
Circuit resistance between the upper and lower bracketsμΩ≤80

Product standards

1. GB 16926- 1997 High-voltage alternatingcurrent load switch-fuse combinations

2. IEC 60420 High-voltage alteratingcurrent load switch-fuse combinations

Ambient condition

1. The altitude: under 1000M.

2. The ambient temperature: -40℃-+40℃.

3. The relative humidity of air: monthly≤90%, daily≤95%.


About us: Suntech Power Tools, which located in the southeast China, it is the earliest origin Power Tools Leading City in China.We are making the various related cable pulling tools, and hydraulic tension and puller to support the transmission work.All canaccept OEM and professionally produced per ISO 9001:2008, they are being sold to over more than 50 countries in the world,and has wined the best brand reputations. Some items like the stringing blocks,cable rollers,the cable jack stands,etc we can customized, and the Construction Safety Tools ,are not demanded the MOQ. You can freely help you out either

Quality 40.5KV Remote Control Indoor Vacuum Load Break Switch for sale
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