• Model NO.: XRNT3A-15.5(40.5)/-50(31.5)
  • Type: Current Fuse
  • Shape: Insert
  • Fusing Device: Link Break
  • Trademark: zhenli
  • Origin: Xi′an
  • Breaking Capacity: High
  • Usage: High Voltage
  • Fusing Speed: FF
  • Standard: UL
  • Transport Package: Carbon
  • HS Code: 8535100000
This product applies to indoor AC 50~60Hz system with the rated voltage of 8.3 ~ 40.5kV for the short-circuit protection of transformer and other power equipment, and is used in series with the oil-immersed transformer overload protection fuse, and can provide the full range protection for indoor power system. The product has passed the type test conducted by the national high-voltage electrical equipment quality supervision and inspection center, and conforms to GB15166.2 and IEC282-1.
Model
       XRNT3A-15.5(40.5)/-50(31.5)
 
Basic parameters
 
 
Product Model Rated Voltage (kV) Rated Breaking Current
(kA) 		Rated Current of Fuse Element (A) Standard Size
A(mm) B(mm) φD(mm)
 
XRNT3A-15.5 		 
15.5 		 
50 		31.5, 40, 50 248 216 φ54
63, 80, 100, 125 356 324 φ54
150, 175 405 373 φ54
XRNT3A-40.5 40.5 31.5 10, 16, 20, 25, 31.5, 40 570 537 φ54
 
 
 
Technical data
Fuse is normally used in transformer oil with the ambient temperature not exceeding 100ºC, and fuse link is of the bolted structure.
The fuse under specified operating conditions is able to reliably break any fault current from the minimum breaking current (3~5) ln to the rated breaking current 50kA.
Time - current characteristic curve of fuse is as shown in Fig. 2 and Fig. 3.
Current limiting characteristic curve of fuse is as shown in Fig. 4.
 
Outline and installing dimensions
 
 High-Voltage Current Limiting Fuse for The Short-Circuit Protection of Oil-Immersed Transformer

Fig.1 a) Outline drawing of XRNT3A-15.5 (40.5) fuse link
 High-Voltage Current Limiting Fuse for The Short-Circuit Protection of Oil-Immersed TransformerHigh-Voltage Current Limiting Fuse for The Short-Circuit Protection of Oil-Immersed Transformer


Fig. 1 b) Clamping and arrangement of XRNT3A-15.5 (40.5) fuse at oil tank
  
 High-Voltage Current Limiting Fuse for The Short-Circuit Protection of Oil-Immersed Transformer

Fig. 2 XRNT3A-15.5 time - current characteristic curve  
High-Voltage Current Limiting Fuse for The Short-Circuit Protection of Oil-Immersed Transformer

Fig.3 XRNT3A-40.5 time - current characteristic curve
 High-Voltage Current Limiting Fuse for The Short-Circuit Protection of Oil-Immersed Transformer

 
Fig.4 XRNT3A current limiting characteristic curve
 

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