Eaton Bussmann Fused Circuit Protection Selection Advice

【选型】Eaton Bussmann(伊顿巴斯曼) 电路保护熔断器（保险丝）选型指南

选型目录：

Fuse Protection Upgrading Introduction

Fused Circuit Protection Selection Advice

Low Voltage Branch Circuit Fuses

Low Voltage Supplemental Fuses and Limiters

Electronic/PCB/Small Dimension Fuses

High Speed Fuses

IEC and British Standard Fuses

Photovoltaic Fuses/Fuses Holders/Fuses Blocks

Medium Voltage Fuses

Fuse Blocks and Holders

Power Distribution and Terminal Blocks

Connector Products

Disconnect Switches

Quik-Spec Electrical Gear

Surge Protective Devices

Telecom Protection Products

Fuse&Fuse Block Accessories

Fuse&Fuse Block Cross Reference and Index

Low-Peak Upgrade Program and Fuse Inventory Consolidation

Introduction

Selecting fused circuit protection

The following fuse selection tables are based on the 2017 NEC and

provide fuse recommendations for the listed applications.

These are only suggestions. Final fuse selection should be

performed by qualified personnel able to fully assess an application's

circuit protection requirements.

If you need assistance in selecting a fuse, contact the Eaton

Application Engineering team Monday through Friday, 7:00 a.m. —

5:00 p.m. Central time.

Application Engineering can be reached via phone (toll-free 855-287-

7626 ) and email (FuseTech@Eaton.com).

To locate the recommended fuse product pages, use the index

starting on page 16-4.

Ballasts

Location

Type

Notes

Fuse recommendation

Fuse holder recommendation

Indoor

Fluorescent

Consult fixture manufacturer for size

and type

GLR, GMF, GRF

HLR

GLQ, GMQ

HLQ

All other (mercury,

sodium, etc.)

Consult fixture manufacturer for size

and type

BAF, KTK, FNM, FNQ

HPF, HPS

KTK-R, FNQ-R, LP-CC

HPS-RR, HPF-RR

BBS

HPS-L, HPF-L

SC up to 15 amps

HPF-EE, HPS-EE

SC 20 amp

HPF-JJ, HPS-JJ

SC 25-30 amps

HPF-FF, HPS-FF

Outdoor

Mercury, sodium, etc.

Consult fixture manufacturer for size

and type.

BAF, KTK, FNM, FNQ

HEB, HEX, HPC-D

KTK-R, FNQ-R, LP-CC

HEY, HEZ

Capacitors (NEC 460)

Protected by

Sizing

Fuse/volt recommendation

Time-delay fuses

150% to 175% of Full Load Current (FLC)

Up to 250 V: LPN-RK_SP, FRN-R

Up to 600 V: LPS-RK_SP, FRS-R, LPJ_SP, LP-CC, FNQ-R, TCF

Non time-delay fuses

250% to 300% of Full Load Current (FLC)

Up to 250 V: KTN-R

Up to 300 V: JJN

Up to 600 V: KTS-R, JKS, KTK-R, JJS, FCF_RN

On loadside of motor

running overcurrent

device

Protection recommended as shown, but not required

—

Electric heat (NEC 424)

Heating type

Sizing

Fuse/volt recommendation

Space heating

125% or next size larger but in no case larger than 60

amps for each subdivided load

Up to 250 V: LPN-RK_SP, FRN-R, NON

Up to 300 V: JJN

Up to 480 V; SC 25 to SC 60

Up to 600 V: LPS-RK_SP, FRS-R, NOS, JJS, LPJ_SP, LP-CC,

FNQ-R, JKS, KTK-R, TCF, SC 1/2 to SC 20, FCF_RN

Boilers (ASME

rated and stamped

vessel)

125% or next size larger but in no case larger than 150

amps for each subdivided load

BUSSMANN SERIES FULL LINE CATALOG 1007 — OCTOBER 2018

Eaton.com/bussmannseries

Introduction

Mains, feeders, branches (NEC 430)

Circuit type

Circuit loads

Sizing

Fuse/volt recommendation

Feeder circuits

≤

600 A

No motor load

100% of non-continuous load plus 125% of continuous load

Up to 250 V: LPN-RK_SP, FRN-R

Up to 300V: JJN

Up to 600 V: LPS-RK_SP, FRS-R, JJS,

LPJ_SP, LP-CC, JKS, KTK-R

Combination motor

and other loads

150% of the FLA of largest motor (if there are two or more

motors of same size, one is considered to be the largest)

plus the sum of all the FLA for all other motors plus 100% of

non-continuous, non-motor load plus 125% of continuous, non-

motor load. A maximum of 175% (or the next standard size if

175% does not correspond to a standard size) is allowed for all

but wound rotor and all DC motors.

Up to 250 V: LPN-RK_SP, FRN-R

Up to 600 V: LPS-RK_SP, FRS-R,

LPJ- SP, LP-CC

Motor loads

150% of the FLA of largest motor (if there are two or more

motors of same size, one is considered to be the largest) plus

the sum of all the FLA for all other motors. A maximum of

175% (or the next standard size if 175% does not correspond

to a standard size) is allowed for all but wound rotor and all DC

motors.

Main, branch

and feeder

circuits

(601-6000 A)

—

150% to 225% of full load current of largest motor plus 100%

of full load current of all other motors plus 125% of continuous

non-motor load plus 100% of non-continuous non-motor load

Up to 600 V: KRP-C_SP

Motor loads (NEC 430)

Circuit voltage

Fuse type

Fuse sized for

Sizing

Fuse/volt recommendation

600 V and less

Time-delay

fuses

Backup overload with

motor starter and short-

circuit protection

125% of motor FLA or next size larger

Up to 250 V: FRN-R

Up to 600 V: FRS-R

130% of motor FLA or next size larger

Up to 250 V: LPN-RK_SP

Up to 600 V: LPS-RK_SP

Short-circuit only

175% of motor FLA or next size larger. (If

175% does not correspond to a standard

size). If this will not allow motor to start,

due to higher than normal inrush currents

or longer than normal acceleration times (5

seconds or greater), fuse may be sized up to

225% or next size smaller.

NOTE

: 150% for

wound rotor and all DC motors.

Up to 250 V: LPN-RK_SP, FRN-R

Up to 600 V: LPS-RK_SP, FRS-R,

LPJ_SP, TCF

Non-time delay

and all Class

CC fuses

Short-circuit only

Maximum of 300% of motor FLA or next

size larger (if 300% does not correspond to

a standard size). If this will not allow motor

to start due to higher than normal inrush

currents or longer than normal acceleration

times (5 seconds or greater), fuses through

600 amps may be sized up to 400% or next

size smaller.

Note

: 150% for wound rotor

and all DC motors.

Up to 250 V: KTN-R

Up to 300 V: JJN

Up to 600 V: KTS-R, JJS, LP-CC, JKS,

KTK-R, FCF_RN

Above 600 V

—

Compare the minimum melting time-current

characteristics of the fuses with the time-

current characteristics of the overload relay

curve. The size fuse which is selected

should be such that short-circuit protection

is provided by the fuse and overload

protection is provided by the controller

overload relays.

Up to 2400 V: JCH, JCK, JCK-A,

JCK-B, 2ACLS, 2BCLS, 2CLS, 2HCLS

Up to 4800 V: JCL, JCL-A, JCL-B,

5ACLS, 5BCLS, 5CLS, 5HCLS

Up to 7200 V: 7BCLS, 7.2WKMSJ,

8ACLS, 8CLS

Solenoids (coils)

Fuse type

Sizing

Fuse/volt recommendation

Branch circuit

Size at 125% or next size smaller

Up to 250 V: LPN-RK_SP, FRN-R (best)

Up to 600 V: LPS-RK_SP, FRS-R, LPJ_SP, LP-CC, FNQ-R, TCF

Supplemental

Size at 125% or next size larger

Up to 32 V: MDL 9-30 A, FNM 20-30 A

Up to 125 V: MDA 25-30 A, FNM 12-15 A

Up to 250 V: MDL 1/16-8 A, MDA 2/10-20 A, FNM 1/10-10 A, MDQ 1/100-7 A

Up to 500 V: FNQ 1/10-30 A

BUSSMANN SERIES FULL LINE CATALOG 1007 — OCTOBER 2018

Eaton.com/bussmannseries

iii

Introduction

Transformers 600 V nominal or less (NEC 450.3)

Protection type

Thermal

overload

protection

Transformer

impedance

Rated

current

Optimum

protection*

NEC maximums

Fuse/volt recommendation

Primary

only (Note:

components on

the secondary

still need

overcurrent

protection)

—

Primary

< 2 amps

125% or next

size larger

300% or next size smaller (see

NEC 430.72(C) for control circuit

transformer maximum of 500%)

Up to 250 V: LPN-RK_SP,

FRN-R

Up to 600 V: KRP-C_SP,

LPJ_SP, LPS-RK_SP, FNQ-R,

FRS-R, TCF

Primary

≥

2 amps

but < 9

amps

125% or next

size larger

167% or next size smaller

Primary

≥

9 amps

125% or next

size larger

125% or next size larger**

Primary and

secondary

Without

—

Secondary

< 9 amps

(see

)

Primary and

secondary

fuses at 125%

of primary and

secondary FLA

or next size

larger

% of primary FLA (or next FLA

size smaller)

= 250%

= 600%

= 400%

% of secondary FLA

= 167% or next size smaller

= 125% or next size larger**

= 167% or next size smaller

= 125% or next size larger**

= 167% or next size smaller

= 125% or next size larger**

Secondary

≥

9 amps

(see

)

With

≤

Secondary

< 9 amps

(see

)

Secondary

≥

9 amps

(see

)

> 6% but

< 10%

Secondary

< 9 amps

(see

)

Secondary

≥

9 amps

(see

)

When sizing the primary fuse for optimum protection, verify the inrush current with the transformer manufacturer and review fuse time-current characteristics.

When 125% of FLA corresponds to a standard rating, the next larger size is not permitted.

BUSSMANN SERIES FULL LINE CATALOG 1007 — OCTOBER 2018

Eaton.com/bussmannseries

Introduction

Transformers over 600 V nominal (NEC 450.3)

Supervised installations

Protection for

Transformer

impedance

Primary Sizing

Secondary

volts

Secondary sizing Fuse/volt recommendation

Primary only

N/A

Code maximum of 250%

or next standard size if

250% does not correspond

to a standard rating

Note: Components on

the secondary still need

overcurrent protection

N/A

Up to 250 V: LPN-RK_SP, FRN-R

Up to 600 V: LPS-RK_SP, LPJ-_SP, KRP-C_SP,

FRS-R, FNQ-R, TCF

Up to 2.475 kV: 2NCLPT, 2CLPT

Up to 2.75 kV: 2CLE, 2HLE

Up to 2750/5500 V: JCW

Up to 5.5 kV: 5HLE, 5CLE, 5HCL, 5BHCL,

5BHLE, 5AHLE, JCY, MV05, 5.5 ABWNA, 5.5

AMWNA, 5.5 FFN

7 Up to 7.2 kV:.2 AMWNA, 7.2 TDLSJ, 7.2

TFLSJ

Up to 8.3 kV: 8HLE, 8CLE, 8BHLE, 8AHLE,

8CLPT, 8NCLPT, 8HCL, 8.25 FFN

Up to 15.5 kV: 15CLPT, 15NCLPT, 15CLE,

15HLE, 15BHLE, 15LHLE, 15HCL, 15BHCL,

MV155, 15.5 CAVH

Up to 17.5 kV: 17.5 CAV, 17.5 TDM

Up to 24 kV: 24 TDM, 24 TFM, 24 FFM

Up to 36 kV: 36 CAV, 36 TDQ, 36 TFQ

Up to 38 kV: 38CLPT, 38 CAV

Primary and

secondary

≤

At code maximum of 300%

> 600 V

At code maximum

of 250%

≤

600 V

At code maximum

of 250%

> 6% but

< 10%

At code maximum of 300%

> 600 V

At code maximum

of 225%

≤

600 V

At code maximum

of 250%

Unsupervised installations

Transformer

impedance

Primary Sizing

Secondary

volts

Secondary sizing

Fuse/volts recommendation

≤

At code

maximum of

300% or next

standard size if

300% does not

correspond to a

standard rating

> 600 V

At code maximum of 250% or

next standard size if 250% does

not correspond to a standard

rating

Up to 250 V: LPN-RK_SP, FRN-R

Up to 600 V: LPS-RK_SP, LPJ-_SP, KRP-C_SP, FRS-R,

FNQ-R, TCF

Up to 2475 V: 2NCLPT, 2CLPT

Up to 2.75 kV: 2CLE, 2HLE

Up to 2750/5500 V: JCW

Up to 5.5 kV: 5HLE, 5CLE, 5HCL, 5BHCL, 5BHLE,

5AHLE, JCY, MV05, 5.5 ABWNA, 5.5 AMWNA, 5.5 FFN

Up to 7.2 kV: 7.2 AMWNA, 7.2 TDLSJ, 7.2 TFLSJ

Up to 8.3 kV: 8HLE, 8CLE, 8BHLE, 8AHLE, 8CLPT,

8NCLPT, 8HCL, 8.25 FFN

Up to 15.5 kV: 15CLPT, 15NCLPT, 15CLE, 15HLE,

15BHLE, 15LHLE, 15HCL, 15BHCL, MV155, 15.5 CAVH

Up to 17.5 kV: 17.5 CAV, 17.5 TDM

Up to 24 kV: 24 TDM, 24 TFM, 24 FFM

Up to 36 kV: 36 CAV, 36 TDQ, 36 TFQ

Up to 38 kV: 38CLPT, 38 CAV

≤

600 V

At code maximum of 125% or

next standard size if 125% does

not correspond to a standard

rating

> 6% but < 10%

At code

maximum of

300% or next

standard size if

300% does not

correspond to a

standard rating

> 600 V

At code maximum of 225% or

next standard size if 225% does

not correspond to a standard

rating

≤

600 V

At code maximum of 125% or

next standard size if 125% does

not correspond to a standard

rating

Solid state devices (diodes, SCRs, triacs, transistors)

Protection type

Sizing

Fuse/volts recommendation

Short-circuit only

F, S, K, and 170M fuse families sized up to several sizes

larger than full load RMS or DC rating of device

Up to 130 V: FWA

Up to 250 V: FWX

Up to 500 V: FWH

Up to 600 V: FWC, KAC, KBC

Up to 700 V: FWP, 170M_, SPP

Up to 1000 V: FWJ, 170M_, SPJ

BUSSMANN SERIES FULL LINE CATALOG 1007 — OCTOBER 2018

Eaton.com/bussmannseries

【选型】Eaton Bussmann(伊顿巴斯曼) 电路保护熔断器（保险丝）选型指南

选型目录：

Fuse Protection Upgrading Introduction

Fused Circuit Protection Selection Advice

Low Voltage Branch Circuit Fuses

Low Voltage Supplemental Fuses and Limiters

Electronic/PCB/Small Dimension Fuses

High Speed Fuses

IEC and British Standard Fuses

Photovoltaic Fuses/Fuses Holders/Fuses Blocks

Medium Voltage Fuses

Fuse Blocks and Holders

Power Distribution and Terminal Blocks

Connector Products

Disconnect Switches

Quik-Spec Electrical Gear

Surge Protective Devices

Telecom Protection Products

Fuse&Fuse Block Accessories

Fuse&Fuse Block Cross Reference and Index

Low-Peak Upgrade Program and Fuse Inventory Consolidation

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