The high-voltage current-limiting fuse XRNP1 can effectively deal with the impact of the system short-circuit current rise rate on equipment safety through its matching design of current limiting characteristics and Joule integral. When a short-circuit fault occurs, the rise rate of the system short-circuit current directly affects the action speed and energy absorption capacity of the fuse, while the Joule integral of the fuse determines the amount of thermal energy accumulated before it cuts off the circuit. XRNP1 optimizes the structure and material properties to form a dynamic balance between the Joule integral and the short-circuit current rise rate, thereby ensuring the reliability of the protection performance.

 

The fuse XRNP1 uses high-purity quartz sand as the arc extinguishing medium and is sealed in a high-strength alumina melting tube. When the short-circuit current hits the fuse at a rapid rise rate, the fuse quickly melts before the current reaches its peak. The current limiting effect of the quartz sand greatly suppresses the arc energy and shortens the duration of the fault current. This process significantly reduces the Joule integral actually borne inside the fuse, making it much lower than the theoretical value of the non-current-limiting fuse, thereby avoiding damage to the melting tube or contact parts due to excessive heat accumulation.

 

During the selection process, the upper limit of the Joule integral of the fuse needs to be evaluated based on the rise rate characteristics of the system short-circuit current. For scenarios with a high short-circuit current rise rate, such as a large-capacity power system or a fault point close to the power supply end, the Joule integral of the fuse must be strictly controlled within the tolerance range of the equipment. XRNP1 compresses the actual I²t value to 10%~20% of the theoretical value through current limiting design, ensuring that the circuit can be quickly disconnected under extreme short-circuit conditions while reducing the thermal stress shock to the protected equipment. Its plug-in structure and standardized configuration of breaking capacity further simplify the selection process of matching the Joule integral of the fuse according to system parameters.

 

YOYIK relies on a senior technical team, including senior engineers who have participated in major hydropower projects such as Gezhouba and Three Gorges, to provide accurate equipment upgrades and technical transformation solutions. The company strictly follows national standards and is equipped with precision machining equipment to ensure high-quality output in every link, meet the special needs of various power stations and steel companies, and set an industry benchmark.

 

Yoyik can offer many spare parts for power plants as below:

 

#DF-Fuse XRNP1-DF

pressure switch RCA218RZ097Z

Auxiliary power PSMU-1-12V/10W

Eddy Current Sensor PR6422/103-100

Pressure relief valve YSF16-55/130KKJ

voltage switching relay RUS-11BS/220V

Display board ME8.530.016 V2-5

AC Active power (Watt) transducer S3-WD-3-015A40N

speed sensor A5S13B90-05

Circulating Water Travel Switch 1M12-02BOS-ZW1

Main Control Board Include LCD Display SY-V2-CTRL (Ver 1.20)

AC Voltage transducer S3-VD-3-15A40

Control power supply PSMB-8-8-48V/240W

Pulse Module Advantech 6 Channels ADAM 5081S-BE

Electromagnetic brake SDZ1-150

linear encoder absolute TDZ-1E-011

Magnetoresistive speed probe HRY1-A100-B02-C01-D05

DC heating controller DJZ-03F

LVDT Sensor TD-1-0250-15-01

Gap measuring Probe (with cable and air

 hose) GJCT-15-E

Guide Vane Opening DYK-11-1013

speed sensor SBZC-01 1-100US

Oil and gas mixing chamber 132X1SY35-30-1-4(B)

camera IST-M938SRZ

Vibration Gauge 330104-00-06-10-01-00

LVDT Sensor TD-1-100-10-01-01

CONVERTER GD2133007

ETS speed probe 159.00.96.11(1)

Rotor Position proximity Transducer ES-11

Potential Transformer Surge Arrester JDZX11-20B

Platinum Thermister WZPK2-343

Eddy Current Signal Converter CON031/914-100

Eddy current vibration sensor CWYDO01Ao8B030CO

Bolt electric heating rod ZJ-20-22

Turbine protection module TPS02

Power transmitter DBS/Q-231 

LVDT sensor TDZ-FRD-302

Flame TV lens FD-IR-ST

Fuse XRNP1

 

PARKER LUCIFER 322H35

switch giật sự cố HKLS-II

LVDT Sensor DEV-LVDT-250-6

Turbine bolt electric heating rod ZJ-20-T13

Digital input/output module DX571 AO

Displacement transmitter LTM-3S-I

PHOTOELECTRIC LEVEL SWITCH GDK-1 24V

Frequency Meter HCD194F-9K1

Sensor DF310880-50-01-00

LVDT Sensor 7000AT

CABLE CONNECTOR 10SL-4

industrial pressure switches 397276-SA1Z03

Hydrogen leakage detection transmitter LH1500-C

SWITCH VACCUM RC861CZ094HSSYMD82

Excitation Cable BXR-300/500V-240

Eddy Current Sensor PR6422/105-130

Temperature Sensor WZPK2-330

Connection Cable CON021/916-160

static pressure pickup SZCB-01-B01-C1

DC bolt heater (hose) ZDK/Φ22*650*460

linear proximity sensor HL-6-350-15

Eddy Current Sensor PR6422/105-120

Eddy Current Signal Converter CON031/913-030

Power supply module 857833

Bolt electric heating rod ZJ-20-13(R)

Speed monitoring instrument JM-C-7F

Flash-EPROM Units 6ES7 953 -8LJ20-0AA0 (512KB)

pressure controller QYJ-10Kpa

LVDT of CV DET.2A.4000A

Hydrogen leakage detection probe LH1500B

Dsiplay Board 3KQZ407125U0100

Pressure Switch RC0450CZ090Z

Braun Card D42151U1

Sensor DF310880-90-07-02

LVDT transmitter XCBSQ-03/50-01-12

Intermediate relay UEG/A-4DPDT/125VDC

TAP POSITION INDICATOR ET-SZ5A

Fuse XRNP1

 

MY-DFYL-2025-5-12