Full Range High-Voltage Current Limiting Fuse for Protection of Dedicated New-Energy 40.5kv Oil-Immersed Transformer

Price:	US $ 280/Piece
Min Order:	10/Piece
Pay Type:	T/T

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Showroom Product Company Profile

This producapplies to AC 50 ~ 60Hz power system with the rated voltage of 40.5kV as short-circuit and overload protection element for power transformer and other power equipment. It is mainly mounted in the 40.5kV American box transformer and may share the box with other electrical elements.
Normal operating conditions
1) Maximum ambient air temperature is 40ºC and the lowest is -40ºC;
2) Altitude is not more than 1000m;
3) Relative humidity: daily average is not more than 95%, and the monthly average is not greater than 90%;
4) Surrounding air is not excessively polluted by the dust, smoke, corrosive or flammable gas, steam or salt fog;
5) When the fuse is used in transformer oil, the ambient temperature of transformer oil shall not exceed 105ºC.
Model description

(Note: "/S" after the rated current means the blown fuse indication and signal output functions, and "/H" after "S" means the application to high-altitude products, i.e. H1 means the altitude greater than 1000m and less than or equal to 2000m, H2 means the altitude greater than 2000m and less than or equal to 3000m. For the altitude greater than 3,000m, the fuse shall be customized. Please contact the company directly.
Basic parameters

Model	Rated Current of Fuse (A)	Rated Current of Fuse Link (A)	No.	Rated Voltage (kV)	Rated Maximum Breaking Current (kA)
XRNT3A-40.5 (ZLR10-40.5)	50	16, 20, 25, 31.5, 40, 50, 63	Fig. 1	40.5	31.5
XRNT3A-40.5 (ZLR10-40.5)	80	63, 80	Fig. 2	40.5	31.5

Outline and installing dimensions
Outline and installing dimensions of fuse are as shown in Fig. 1 (63A dimensions in bracket) and Fig. 2

Fig.1 a) Outline drawing of XRNT3A(ZLR10)-40.5/16~63A fuse link

Fig.1 b) Outline and installing dimensions of XRNT3A(ZLR10)-40.5/16~63A fuse

Fig.2 a) Outline drawing of XRNT3A(ZLR10)-40.5/63~80A fuse link

Fig. b) Outline and installing dimensions of XRNT3A(ZLR10)-40.5/63~80A fuse
Main technical data
The fuse under specified operating conditions is able to reliably break any fault current from the minimum fusion current to the rated breaking current 31.5kA.
Fuse is of the plug-in structure and consists of the fuse link, fuse element carrier and bracket shell.
The temperature of transformer oil around the fuse shall not exceed 105ºC, and when the ambient temperature is higher than 40ºC, the fuse shall derate by 1% for every 1ºC rise.

Fig. 3 Time - current characteristic curve

Installation and use description:
The specifications of mounting holes of fuse on the transformer box are as followsφ100+1.5 0(16~63A),φ120+1.5 0(63~80A) . Four M10×45 mm bolts (M10 blind screw hole) are arranged around the round hole with the spacing between the bolts (screw holes) as 115×115±0.5mm(16~63A) and 130 × 130±0.5mm (63 ~ 80A), and the positions of four bolts (screw holes) are concentric with the mounting holes;
After the fuse is mounted into the box, the adequate insulation distance shall be maintained between the outer skins of fuse bracket shell and between the outer skin of bracket shell/ends and the inner wall of transformer oil tank/out-phase cable;
Fuse is installed horizontally and is perpendicular to the panel of transformer box. The part of fuse into the tank shall be immersed in the transformer insulation oil and reliably supported with the insulation bracket (supplied by user, see Fig.1 and Fig. 2).
Installing steps:
1. The insulation bracket shall be (supplied by user) installed in the transformer box according to Fig.1 and Fig. 2, or the fuse is prone to sag due to the self weight, causing the uneven force between the sealing ring and panel or breakage at the root of fuse bracket flange, thus leading to the oil spill.
2. Fit the sealing ring into the fuse bracket and through the corresponding hole on the box to make the fuse bracket perpendicular to the box panel, and tighten four fixing nuts, and then tighten the insulation bracket with the nylon cable ties or insulation tape.
3. Connect the front and rear terminals of fuse in series to the return conductor, and tighten the screws moderately;
4. Before inserting the fuse link, check the threaded connection between the fuse link and fuse element carrier for looseness. Fuse link metal cap surface and the conductive contact surface of fuse element carrier shall be clean. Then make the arrow direction on the lid of fuse element carrier aligned with that on the aluminum gland. Hold the handle and fuse link respectively with one hand each and insert it lowly into the fuse bracket, and then pull down the handle to lock it.
5. Connect the intermediate, normally-close and normally-open contacts on the lid.
Rational use:
1. The rated current of fuse link is from 16A to 80A, and the greater rated current may be achieved through the double-parallel mode.
2. When replacing the fuse link, do not switch to on-load circuit when it is uncharged;
3. For the three-phase system, when the fuse of one phase acts, generally replace all three phases unless you can confirm that the fault current passes through one phase. In the replacement of fuse link, the fusion tube getting yellow or darker is normal.
Selection of fuse

General Principle for Fuse Selection
Rated Voltage (kV)	Rated Capacity of Transformer (kVA)
	500	630	800	1000	1600	2000	2500	3150
	Rated Current of Fuse (A)
40.5	16	20	25	31.5	40	50	63	80

Prod Model:	XRNT3A-40.5/16~80A
Breaking Capacity:	High
Type:	Current Fuse
Usaga:	High Voltage
Fusing Device:	Link Break

Founded on March 7, 1998, Shaanxi Zhenli Electric Power Technology Co., Ltd. (formerly known as Xi'an Zhenli Fuse Co., Ltd. ) was located in F4-402 Lutong Industrial Park, East Section of Kuangshan Road, East Er'huan, Xi'an with the industrial plants covering 1771.08 square meters. As the company business gradually expanded, it was moved to No 2055, Shanglinyuan No. 5 Road, High-tech District, Xi'an in 2017, with three self-built standard plants covering 20847.26 square meters and a total of 80 staff including 8 research staff, 6 professionals and 6 product designers. As required by High-tech District of Xi'an, the company was restructured into Xi'an Xiangyuan Zhenli Electric Co., Ltd., a high-tech enterprise specialized in research and development, production and sales of indoor and outdoor fuses whose production scale and technical level lead the industry in China. So far, the number of fuses running in the power grid in the world is more than 3 million and the company has rich experience of line operation. Its products cover the voltage within 3.6~40.5kV and the current within 0.2A~315A. Its main products belong to new-energy wind-photovoltaic power hybrid power generation system strongly supported and developed by the nation. Currently, its main clients are Schneider, ABB, TBEA, Shandong Taikai, Jiangsu Huapeng and other Top 500 enterprises in the world and listed companies in China. The products are sold as far away as Portugal, Thailand, Mexico, Pakistan and other countries.