12-21-98

SB98107

Rev. A

LPT

Class T – 600 Volts, 35-60 Amps

Current Limitation Curves

Time-Current Characteristic Curves–Average Melt

CURRENT IN AMPERES

AMPERE

RATING

1

.1

.01

100

10

1,000

RMS SYMMETRICAL CURRENTS IN AMPERES

A–B=ASYMMETRICAL AVAILABLE PEAK (2.3 X SYMM RMS AMPS)

60

35

100,000

10,000

1,000

100

400,000

A

B

Form No. LPT

Page 2 of 2

BIF Document: 1031

The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this BIF document are by definition uncontrolled. This bulletin is intended to

clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change design or construction of any

products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been select-

ed, it should be tested by the user in all possible applications.

Motor Application

Per NEC 430-52: LPT fuses may be sized at a maximum of

300% of motor F.L.A. (or next standard fuse size, if 300%

does not correspond to a standard fuse size). For longer

acceleration times, fuse sizing can be increased but shall not

exceed 400%.