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High-Voltage Current Limiting Fuse for Motor Protection

Name: High-Voltage Current Limiting Fuse for Motor Protection
Brand: all-electronics-online.com
SKU: 832702885
Availability: InStock
Rating: 4.3 (49 reviews)

Price:	Negotiable/Piece
Min Order:	3/Piece
Pay Type:	T/T

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Showroom Product Company Profile

Prod Model:	XRNM3A- (3.6~12)/ -50
Breaking Capacity:	High
Type:	Current Fuse
Usaga:	High Voltage
Fusing Device:	Fuse Link

Product Description

This product applies to the indoor AC 50 ~ 60Hz system with the rated voltage of 3.6~12kV, and may be used along with other protective devices (such as the switch, vacuum contactor, etc.) as short-circuit and overload protection element for the high-voltage motor and other power equipment.
Model
International model XRNM3A- (3.6~12)/ -50
Equivalent model

BS standard:

Basic parameters as per DIN standard

Product Model	Equivalent Model	Rated Voltage (kV)	Rated Current of Fuse Element (A)	Standard Size		Rated Breaking Current (kA)
Product Model	Equivalent Model	Rated Voltage (kV)	Rated Current of Fuse Element (A)	φA(mm)	L(mm)	Rated Breaking Current (kA)
XRNM3A-7.2	WDLDJ	7.2	25, 31.5, 40, 50, 63	φ51	292	50
	WELDJ		63, 80, 100	φ66
	WFLDJ		125, 160	φ76
	WXLDJ		160, 200, 224, 250, 315	φ88
	WFMDJ		25, 31.5, 40, 50, 63, 80, 100, 125, 160	φ76	442
	WKMDJ		200, 224, 250, 315	φ76	442
XRNM3A-12	WDLDJ	12	20, 25, 31.5, 40, 50	φ51	292	50
	WELDJ		50, 63, 80	φ66
	WFLDJ		80, 100, 125	φ76
	WXLDJ		160, 200	φ88
	WFMDJ		25, 31.5, 40, 50, 63, 80, 100	φ76	442
	WKMDJ		125, 160	φ76
	WXMDJ		200, 224	φ88

Outline dimensions as per DIN standard

Fig. 1 Outline drawing of XRNM3A fuse link
(1)Bus fuse

Model	Equivalent model	Rated Voltage (kV)	Rated Current of Fuse Link (A)	Main Dimensions (mm)				Rated Breaking Current (kA)
				A	B	C	D
XRNM3A-3.6	WDF.0	3.6	50, 63, 80, 100, 125	377	254	305	Φ51	50
	WFF.0		125, 160, 200				Φ76
	WKF.0		250, 315, 355, 400
XRNM3A-7.2	WFF.0	7.2	25, 31.5, 40, 50, 63, 80, 100, 125, 160	486	403	454	Φ76	50
	WKN.0		200, 224, 250, 315, 355
XRNM3A-12	WKX.0	12	25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 224	683	600	650	Φ76	50

Note: The above-mentioned are the rated parameters of single tube, and higher rated current value may be obtained through the parallel connection of fixed structure.
Outline drawing of bus fuse

Basic outline parameters of plug-in fuse
in mm

Size code Model	A	B	C	D	E	F	G
WDF*0	390	312	80	140	246	254	φ51
WEF*0							φ76
WKF*0
WFN*0	500	461	150	160	266	403
WKN*0
WFX*0	690	659	350	160	268	600

Outline drawing of plug-in fuse

Main technical data:
The fuse under specified operating conditions is able to reliably break any fault current from the minimum breaking current (1.6~3) ln to the rated breaking current 50kA.
Time - current characteristic curve is as shown in Fig. 4, Fig. 5 and Fig. 6.
Current limiting characteristic curve is as shown in Fig. 7.

Rational use of fuse
The rated current of the fuse for direct start shall be selected according to the following formula
Iy=NInδ
Where,
In- full load current of motor
δ- Coefficient of colligation as shown in the following table
N- Ratio of starting current to full load current, generally N = 6
Iy-Current value during start-up

Starting Frequency n/h	2	4	8	16
δ	1.7	1.9	2.1	2.3

The point corresponding to ly value at the starting shall be plotted on the time - current characteristic curve, and the curve corresponding to the point or the curve on the right side of point means the fuse's curve. The rated current of fuse shall be greater than 1.3 times the full load current of motor.

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.