PRNT4-15.5, PRNT4-24, PRNT4-40.5 series of high-voltage fuses for
overload protection of oil-immersed transformers are suitable for
use in power systems with AC rated frequency of 50Hz and rated
voltage of 15.5kV, 24kV and 40.5 kV respectively. As the overload
protection protection element for power transformer and other power
equipment, the fuse is installed in the transformer oil of American
type box transformer or other box transformer, and can be co-boxed
with transformer and load switch. The oil-immersed transformer
overload protection high-voltage fuse can not be used alone, can be
connected in series with the transformer backup protection
high-voltage current-limiting fuse to form a full range of
high-voltage current-limiting fuse. When the overload current
exceeds the specified value for a certain period of time, the
circuit is opened by the overload high-voltage fuse. When the
short-circuit current passes through the fuse, the short-circuit
current is opened by the backup high-voltage current-limiting fuse.
The product can be widely used in the distribution protection of
wind power generation, solar power generation, tide stream power
generation and other equipment.
This product consists of two parts: overload protection fuse and
plug-in bracket.
1. Model and meaning :
2. This product is composed of overload protection fuse and fuse
holder.
2.1 Basic engineering data:
| Model number | Rating current of fusible core (A) | Service enviornment | Rating breaking current (KA) |
PRNT4-15.5
PRNT4-24
PRNT4-40.5 | 5, 6.3, 10 , 16, 25, 40, 50, 63
100, 140 | in transformer oil | 2.5 |
Note:Dual fuse maximum 63A
2.2 See picture 1 for the size and installation of the overload
protection fuse
Picture 1,XRNT4-15.5 High voltage fuses for overload protection of
oil immersed transformer .
2.3 See picture 2 and picture 3 for the dimension and installation
of the plug-in fuse holder
3. Installation steps of fuse wire:
4. Time-current characteristic curve of bay-o-net fuse as below :
| Transformer capacity (KVA) | 12KV power system | 24KV power system | 40.5KV power system |
| overload fuse | Backup current limiting fuse | overload fuse | Backup current limiting fuse | overload fuse | Backup current limiting fuse |
| 100 | PRNT4-15.5/10 | XRNT4-15.5/31.5 | PRNT4-24/6.3 | XRNT4-24/16 | PRNT4-40.5/5 | XRNT4-40.5/10 |
| 200 | PRNT4-15.5/16 | XRNT4-15.5/40 | PRNT4-24/10 | XRNT4-24/20 | PRNT4-40.5/8 | XRNT4-40.5/16 |
| 315 | PRNT4-15.5/25 | XRNT4-15.5/50 | PRNT4-24/16 | XRNT4-24/32 | PRNT4-40.5/10 | XRNT4-40.5/20 |
| 400 | PRNT4-15.5/32 | XRNT4-15.5/63 | PRNT4-24/20 | XRNT4-24/40 | PRNT4-40.5/16 | XRNT4-40.5/31.5 |
| 500 | PRNT4-15.5/40 | XRNT4-15.5/80 | PRNT4-24/25 | XRNT4-24/50 | PRNT4-40.5/20 | XRNT4-40.5/40 |
| 630 | PRNT4-15.5/50 | XRNT4-15.5/100 | PRNT4-24/31.5 | XRNT4-24/63 | PRNT4-40.5/25 | XRNT4-40.5/50 |
| 800 | PRNT4-15.5/65 | XRNT4-15.5/125 | PRNT4-24/40 | XRNT4-24/80 | PRNT4-40.5/25 | XRNT4-40.5/50 |
| 1000 | PRNT4-15.5/80 | XRNT4-15.5/150 | PRNT4-24/50 | XRNT4-24/100 | PRNT4-40.5/31.5 | XRNT4-40.5/63 |
| 1250 | PRNT4-15.5/100 | XRNT4-15.5/175 | PRNT4-24/65 | XRNT4-24/125 | PRNT4-40.5/31.5 | XRNT4-40.5/63 |
| 1600 | PRNT4-15.5/140 | XRNT4-15.5/200 | PRNT4-24/80 | XRNT4-24/150 | PRNT4-40.5/40 | XRNT4-40.5/80 |
| 2000 | | XRNT4-15.5/250 | PRNT4-24/100 | XRNT4-24/200 | PRNT4-40.5/50 | XRNT4-40.5/125 |
| 250 | | | | | PRNT4-40.5/65 | SRNT4-40.5/125 |
Model and meaning
Xi 'an Wuhuan Special Fuse Co., Ltd. is a high-technology
manufacturer company established by Wuhuan Electric Group in Xi
'an, Shaanxi Province, China's high voltage electric production
base in 2000. It mainly engaged in the development, design,
manufacture, sales and service of fuses and other high voltage
appliances. The main products of the company are high-voltage
current limiting fuses, which are used in indoor 50HZ/60HZ power
systems with rated voltage of 3.6-40.5KV. As American power
transformer, Europe type power transformer, high voltage motor,
voltage transformer, power capacitors and other electric equipment
overload and short circuit protection, and in other appliances such
as: load switch, vacuum contactor etc, protection circuit and
complete sets of electrical equipment from damage by excessive
overload current and short circuit current. The company has
high-quality technical personnel, professional fuse manufacturing
and testing equipment and advanced modern enterprise management
concept, its product categories, production scale and sales revenue
are growing at a high speed. Wuhuan Company implements ISO9001:2000
quality system standard, uses MCAD development and design, with the
help of Intuitive ERP and advanced testing equipment to ensure the
reliability of production and high quality products. All the
products have passed the type test of the national high voltage
electrical apparatus quality supervison and inspection center ,and
are in line with the national GB/T15166.2 standard and IEC60282
standard of the International Electrotechnical Commission.
New products:
SDLDJ and SFLDJ & SDMDJ full-range protection high-voltage current
limiting fuses developed by our company are mainly used for
overload and short-circuit protection of domestic power generation
transformers. This series of products complete specifications,
rated current up to 100A, products have passed the national high
voltage electrical quality supervision and inspection center type
test.
Quality standards of the company:
We fully implement GB/T15166.2 and IEC60282(International
Electrotechnical Commission) technical standards, product quality
in line with the British BS standard, German DIN standard. Rigorous
design, advanced technology, timely service, the company's quality
system for the implementation of the quality policy to provide a
full guarantee.
Our products:
1.High voltage fuse for overload protection of oil-immersed
transformer
2.High voltage current limiting fuse for backup protection of
oil-immersed transformer
3.High voltage current limiting fuse for power transformer
protection
4.High voltage current limiting fuses for protection of 40.5kv
transformer
5.High voltage current limiting fuse for full range protection of
power transformer
6.High voltage current limiting fuse for protection of high voltage
motor
7.High voltage current limiting fuse for vacuum contactor fuse
(F-C) combination appliance
8.High voltage current limiting fuse for protection of voltage
transformer
9.High voltage current limiting fuse for power capacitor protection
10.XRNT-15.5Q Full-range high-voltage current limiting fuse for
transformer protection (integral)
11.Full range high voltage current limiting fuse for XRNT-40.5Q
transformer protection (integral)
1.Are you manufacture?
We are a professional factory with more than 20 years of
experience,Our projects supplied to Airprot/Subway/Railway/power
station.
2.What is your technical advantages?
Our engineers worked in the power distribution industry field for
20~30 years.In particular, in non-standard customization of
electric field, High altitude, non-standard voltage frequency
field.
3.What is your price advantages?
we have 5 branch factories for electric components,all raw
materials are one stop shopping,so we can save the value for you!
4.How about your quality advantage?
We are 100% guarantee the quality for 3 years, provide 5% free rate
of change.
5.How about your delivery time?
The delivery time with 7-10 working days after getting deposit. Our
factory is located in Xi'an , China . In terms of quality and
strength, we are both ahead of the market .6.We can accept payment way:
TT/LC/DP /STS ORDER
