High-voltage current limiting fuse for full range protection - XI'AN XIANGYUAN ZHEN-LI ELECTRIC CO.LTD.

This product applies to indoor AC 50~60Hz system with the rated voltage of 12kV ~ 24kV. It is able to reliably break any fault current from the fusion current to the rated breaking current. The product not only has the higher breaking capacity of the current limiting fuse, but also has the better small current protection characteristics of non-limiting current fuse, achieving the good protection characteristic of full range breakage.

Model

Domestic model: XRNT3A-□/□-50kA

Equivalent model:

High-voltage current limiting fuse for full range protection

Basic parameters:

Product Model	Equivalent Model	Rated Voltage (kV)	Rated Current of Fuse Link (A)	Standard Size		Rated Breaking Current (kA)
				φA	L
XRNT3A-12	FFLDJ	12	10, 16, 20, 25, 31.5, 40, 50, 63	φ76	292	50
	FXLDJ		80, 100	φ88	292
XRNT3A-24	FDMDJ	24	6.3, 10, 16, 20, 25	φ51	442	31.5
	FFMDJ		31.5, 40, 45	φ76	442

Outline dimensions
Fig. 1 Outline dimensions of XRNT3A full range fuse

Main technical data
Fig. 2 FFL, FXL 12kV time - current characteristic curve
Fig. 3 FDM, FFM 24 time - current characteristic curve

Fig. 4 F fuse current limiting characteristic curve

Selection of fuse

General selection principle for primary full range fuse of transformer

Rated Voltage (kV)
Rated Capacity of Transformer (kVA)
125
160
200～250
315
400
500
630
800
1000
Rated Current of Full Range High-voltage Fuse (A)
12
10
16
20
25
31.5
40
50
63
80
24
6.3
10
16
20
25
31.5
40
XRNT

Rated Voltage (kV)	Rated Capacity of Transformer (kVA)
	125	160	200～250	315	400	500	630	800	1000
	Rated Current of Full Range High-voltage Fuse (A)
12	10	16	20	25	31.5	40	50	63	80
24	6.3	10	16	20	25	31.5	40