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Home > Electrical & Electronics > Breaker & Protector > Fuse > High Voltage Fuses Type W for Motor Protection

High Voltage Fuses Type W for Motor Protection

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High Voltage Fuses Type W for Motor Protection photo-1

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High Voltage Fuses Type W for Motor Protection photo-4

Negotiable MOQ: 30 Pieces (Price negotiable depending on order volume and customization)

Key Specifications

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Place of Origin:

Zhejiang, China

Brand Name:

Model Number:

WDFHO,WFFHO,WKFHO,WFNHO,WKFHO

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Wenzhou Shuguang Fuse Co., Ltd.

Payment & Shipping

Payment Methods:

Port of Shipment:

Shanghai or Ningbo

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Place of Origin Zhejiang, China

Brand Name SR

Model Number WDFHO,WFFHO,WKFHO,WFNHO,WKFHO

Usage High Voltage

Breaking Capacity High

Safety Standards IEC

Applications: H.V HRC current-limiting fuses type W motor protection is mainly used in AC 50hz.rated voltage 3.6-10kv,rated current up to 400A(3.6KV),224A(7.2KA) circuit for protecting motor and power equipment form overload and short-circuit.it can also be sued withload switch.vacuum contact. it conforms to IEC282-1,IEC644,BS and GB1516.2

DESIGN FEATURES: W type H.V HRC current limiting fuses has two installation. bus-*bar installation and insert installation. it is small in volume.reliable in connection the power striker parallels to the fuse element made from pure silver .they are sealed. in the fuse tube filled with chemically treated high -purity quarta sand.it is made from heat resistand.high duty ceramic or epoxy glass.when fault circuit happens the fuse link metlts.the high resistant metal wire paralleling to fuse link melts immediatedly at the appearamce of the arc.and the strikerjumps out to push the chained equipment contact.signaling the melting or automatically cutting the circuit.W type H.V HRC current limiting fuse has many merits as high current limiting ability .high breaking capacity.quick and punctual in action.reliable in performance

Key Specifications/Special Features:

1.motor protection

2.High breaking capability

3.High voltage current limiting fuse

4.Suitable for electrical power system of AC 50Hz, rated voltage 10kV and below, rated current up to 400A(3.6KV),224A(7.2KV) circuit for protecting motor and other power equipment from overload and short-circuit.

5.High-pressured fuse conforms to the national GB15166.2 standard and the international electrical committee IEC 60282 standard as well as German DIN standard and British BS standard.

model		Rated voltage KV)	rated current of the fuse links (A)	Rated breaking current (KA)	dimensions (mm)¢D	(See fig.,1 )L
Foreign	Department	Rated voltage KV)	rated current of the fuse links (A)	Rated breaking current (KA)
WDF.O	XRNM1	3.6	50/63/80/100/125	50	51	254
WFF.O	XRNM1	3.6	125/160/200	50	76	254
WKF.O	XRNM1	3.6	250/315/355/400	50	76	254
WFN.O	XRNM1	7.2	25/31.5/40/50/63/80/100/125/160	40	76	403
WKF.O	XRNM1	7.2	200/224	40	76	403
	XRNM1	10	25/31.5/40/50/63/80/100/125/160/200/224	40	76	600

NOTE:under stipulated condition.min breaking current of fuse could be as high as 2.5-3times than rated current.

7.2KV fuse link of 224A or above have a dual tube body

3.6KV fuse link of 400A or above have a dual tube body

DIMENSION OF MOTOR PROTECTION FUSE TYPE w FOR BUSBAR INSTALLATION(MM)

MODEL	DIMENSIONS
MODEL	A	B	C	G	E	F
WFF.O	390	312	340	140	246	209
WKF.O	390	312	340	140	246	209
WFN.O	500	461	150	160	266	359
WKN.O	500	461	150	160	266	359
XRNM1	690	659	350	160	266	555

SELECTION FOR W TYPE MOTOR CURRENT LIMITING FUSE

When started with full voltage.rated current≈twice of loade motor current.when started under other circumstances.rated current≈1.5times of loaded motor current for directly started motor.fuses of proper rated current should be selected according to the following formula.

ly=N.1ndiameter

ly:Starting curren

N:Ration of starting current and loaded current.usually N≈6

1n:Loaded motor current

diameter:comprehensive coefficient.see the table below:

diameter comprehensive coefficient
start time	2	4	8	16
diameter	1.7	1.9	2.1	2.3

Rear to time current characteristic diagram for selection of proper H.V.fuse link.rated current of fuse link should be 1.3 times than loaded motor current.