High voltage fuse supplier,Transformer protection - Shanghai Zhiguang Fuse Co.,Ltd

It can be used in indoor system of 50Hz and rated voltage of 3.6KV, 7.2KV, 12KV, 24KV and 40.5KV. Used together with other switch facilities such as loading switches, vacuum contactors, it can protect electric transformers and other electric facilities against overloading or circuit break. It is also a necessary accessory for high-voltage switch.
high voltage current limiting fuse for protection of transformer 1

Type	Counterpart	Rated voltage (KV)	Rated current of the fuse (A)	Rated current of the fuse link (A)
XRNT-12	SDLAJ	12	40	3.15、6.3、10、16.20、25、31.5、40
XRNT-12	SFLAJ	12	100	50、63、71、80、100、(125)
XRNT-12	SKLAJ	12	125	125.160、200、250
XRNT-24		24	200	3.15、6.3、10、16、20、25、31.5、40、50、63、8o、100、125、160、200
XRNT-40.5		40.5	125	3.15、6.3、10、16、20、25、31.5、40、50、63、80、100、125

high voltage current limiting fuse for protection of transformer 2

Basic parameters

The basic parameters of the fuser are shown in Table 1 and Table 2

Main technical data

(1) The fuse should be able to break any fault current between the minimum breaking current l3 and the maximum breaking current h. ls current is about 4 times the rated current
(2) The time-current characteristics are shown in Figure 1, and the part above the minimum breaking current l3 is the dotted line

Shape and installation dimensions

The appearance and installation dimensions of the fuse are shown in chat2, chat3, chat4

Table1

Type	Rated voltage (A)	Fuse rated current (A)	Main parameters (mm)		Rated maximum breaking current (kA)	Dimensions
			length	diameter
BFY□-40.5KV/□A	40.5	3.15、6.3、10、16、20、25、31.5、40、50 3.15、6.3、10、16、20、25、31.5、40、50	650	Φ76	31.5	Plug-in type see Figure 2
						Bus type see Figure 3
XRNT□-40.5 KV/□A-31.5-1		3.15、6.3、10、16、20、25、31.5、40、50				See picture 4

high voltage current limiting fuse for protection of transformer 5

◆Technique data

Type	Rated voltage UN (KV)	Rated current IN(A)	Diameter×Length (mm)	Rated breaking current [KA)
XRNT1	3.6/7.2	6.3	Φ50X192 Standard size	63
		10
		16
		20
		25
		31.5
		40
		50
		63	Φ76X192 Standard size
		80
		100
		125
		160	Φ88X192 Standard size
		*200		50
		*250		50
		6.3	Φ51X292 Standard size	63
		10
		16
		20
		25
		31.5
		40
		50
		63	Φ76X292 Standard size
		80
		100
		125
		160	Φ88X292 Standard size	50
		*200
		*250
		*315
		*355
		100	Φ76X442	63
		125	Φ76X442
		160	Φ88X442
		*200		50
		*250
		*315
		*355
		*400
		*500

Type	Rated voltage UN (KV)	Rated current IN(A)	Diameter×Length (mm)	Rated breaking current [KA)	Foreign reference model
XRNT1	6/12	6.3	Φ51X192	63	SDLAJ
		10
		16
		20	Φ76X192
		25
		31.5
		40
		2	Φ51X292 Standard size
		3.15
		6.3
		10
		20
		31.5
		40
		50	Φ63X292 Φ76X292 Standard size		SFLAJ
		63
		80
		100
		125			SKLAJ
		*160	Φ88X292 Standard size	50
		*200	Φ88X292 Standard size	50
		6.3	Φ51X442	63	High-voltage current-limiting fuse for high-voltage center cabinet
		10
		16
		20
		25
		31.5
		40
		50	Φ76X442 Standard size
		63
		80
		100
		125
		160	Φ88X442 Standard size
		*200		50
		*250		50

(*) Please pay attention to the use of derating, please refer to the reasonable selection of fuse.

Type	Rated voltage UN( KV)	Rated current IN(A)	Diameter×length (mm)	Rated breaking current (KA)
XRNT1	20/24	6.3	Φ53X442 Standard size
		10
		16		63
		20
		25
		31.5
		40
		50	Φ63X442 Standard size
		63
		80
		100
		125	Φ88X442 Standard size	40
		160
		200
	36/40.5	6.3	Φ51X442	31.5
		10
		16
		6.3	Φ51X537 Standard size	40
		10
		16
		20
		25	Φ76X537 Standard size
		31.5
		40
		50	Φ88X537 Standard size
		63
		80
		160

(*) Please pay attention to the use of derating, please refer to the reasonable selection of fuse.

Transformer capacity KVA	Transformer primary voltage 7.2kV
Transformer capacity KVA	Fuse rated voltage KV	Fuse rated current A
100	7.2	20
125		20
160		25
200		31.5
250		40
300/315		50
400		71
500		80
630		100
750/800		140
1000		160
1250		200

Transformer capacity KVA	Transformer primary voltage 12kV
Transformer capacity KVA	Fuse rated voltage KV	Fuse rated current A
100	12	16
125		16
160		16
200		20
250		25
300/315		31.5
400		40
500		50
630		63
750/800		80
1000		100
1250		125
1500/1600		160
2000		200

Transformer capacity KVA	Transformer primary voltage 24kV
Transformer capacity KVA	Fuse rated voltage KV	Fuse rated current A
100	24	6.3
125		6.3
160		10
200		10
250		16
300/315		16
400		20
500		25
630		31.5
750/800		40
1000		50
1250		63
15000/1600		80
2000		100
2500		125
3150		160
4000		200

Transformer capacity KVA	Transformer primary voltage 12kV
Transformer capacity KVA	Fuse rated voltage KV	Fuse rated current A
50	35	2
100		3.15
125		5
160		5-6.3
200		6.3
250		8-10
315		10-12
400		12-16
500		16
630		20-25
800		25-31.5
1000		31.5-40
1250		40-50
1600		50
2000		63

high voltage current limiting fuse for protection of transformer 6

Type	Equivalent model	Rated voltage (kV)	Fuse rated current (A)	Main parameters (mm)			Rated maximum breaking current (kA)
				C	ΦD
XRNT□-3.6	ADF*□	3.6	6.3、10、16、20、25、31.5、40	254		Φ51	50
	ADG*□		6.3、10、16、20、25、31.5、40、50、63、80、100	359
XRNT□-7.2	ADF*□	7.2	6.3、10、16、20、25、31.5、40、50、63	254
	BDG*□		6.3、10、16、20、25、31.5、40、50、63、80	359
	AFF*□		80、100	254		Φ76
	BFG*□		100	359
	BKG*□		125、140、160
XRNT□-12	BDG*□	12	6.3、10、16、20、22.4、25、31.5 、35.5、40、45、50	359		Φ51
XRNT□-12	BFG*□	12	56、63、71、80、90、100	359		Φ76
	AKG*□		112、125
	AKG*□		160、200			Φ88

Note: 1. The above are the rated parameters of a single tube. A fixed structure can be used to connect the fuse in parallel according to user needs to obtain a high rated current value;
2. "Represents different types of impactors.

Main technical data

(3) The fuse should be able to break any fault current between the minimum breaking current l3 and the rated maximum breaking current.
●The fuse below the rated current 125A does not include 125A l3 current is about 4 times the rated current.
●Rated current above 125A includes 125A l3 current is about 7 times the rated current.
(4) The time-current characteristic is shown in Figure 1, and the part above the minimum breaking current is the dotted line.

Shape and installation dimensions

The appearance and installation dimensions of the fuse are shown in Figure 2 to Figure 8.

Selection of fuse

The general selection of fuses for the primary side of the transformer is shown in Table 2

Table2

Transformer capacity KVA	Transformer primary voltage 3.6KV
Transformer capacity KVA	Fuse rated voltage KV	Fuse rated current A
100	3.6	31.5
125		40
1160		50
200		63
250		80
300/315		90

Transformer capacity KVA	Transformer primary voltage 3.6KV
Transformer capacity KVA	Fuse rated voltage KV	Fuse rated current A
100	7.2	20
125		20
160		25
200		31.5
250		40
300/315		50
400		71
500		80
630		100
750/800		140
1000		160

Transformer capacity KVA	Transformer primary voltage 3.6KV
Transformer capacity KVA	Fuse rated voltage KV	Fuse rated current A
100	12	16
125		16
160		16
200		20
250		25
300/315		31.5
400		40
500		50
630		63
750/800		71
1000		90
1250		112
1500/1600		125