FZ(R)N21-12 Indoor high-voltage vacuum load switch

Описание:

• Classification Series ：High Voltage Vacuum Load Switch • Product Name ：FZ(R)N21-12 Indoor high-voltage vacuum load switch • Product Overview： FZ(R)N21-12D indoor high-voltage alternating-current vacuum load switch-fuse combination("combination"for short)is used in powersystems with an AC frequency of 50 Hz and a rated voltage of 10 kV to break load currents...

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подробность

FZ(R)N21-12D indoor high-voltage alternating-current vacuum load switch-fuse combination("combination"for short)is used in powersystems with an AC frequency of 50 Hz and a rated voltage of 10 kV to break load currents,overload currents and short-circuit currents.Itparicularly applies to the places needing control,protection for oil-free,maintenance-free and frequently-operated ring network power supplyunits and terminal power supply transformers.

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

Product standards

FZ(R)N21 indoor load switch is produced in line with the following standards and codes.

●GB 16926-1997 High-voltage alternating-current load switch-fuse combinationsIEC 60420 High-voltage alternating-current load switch-fuse combinations

Operating conditions

Normal operating conditions

Ambient temperature:-40℃~+40℃(below 35℃ within 24 hours)

●Relative humidity:≤95%(daily average)or ≤90%(monthly average)Altitude:≤1000m

Technical parameters

Item	Unit	Reference value
Rated voltage	kV	12
Rated frequency	Hz	50
Maximum rated current of the fuse	A	125
Rated transfer current	A	3150
Rated short-circuit breaking current(expected effective value)	kV	31.5
Rated short-circuic making current (expected peak value)	kV	80
1min power-frequency Vacuum gap,interpole,pole-to-ground	kV	42
withstand voltage solating gap	kV	48
Lightning impulse Vacuum gap,interpole,pole-to-ground	kV	75
withstandvoltage lsolating gap	kV	85
Output energy of the fuse striker	J	2~5

Technical parameters for disconnector assembling

ltem	Unit	Reference value
Non-synchronous making of the three contacts	mm	≥3
Deviation of making of the three contacts	mm	≤1
Positive pressure of the contact switch	N	260±30
Size of the ga	mm	≥150
Circuit resistance	μQ	≤40

Overall and Installation dimension

Overal dimension of FZN21-12D indoor high-voltage altemating-current vacuum load switch(top-in bottom-out and lefthand operation)

Overall dimension of FZ(R)N21-12D indoor highvotage altemating curent vacuum load switch-fuse combination(top in bottom-out and left hand operation)