Datasheet > 20E1CL5.5

20E1CL5.5

更新时间： 2023-09-24 09:13:48

品牌	Logo	应用领域
力特 - LITTELFUSE		变压器
页数	文件大小	规格书
10页	564K
描述
E级保险丝具有时间电流特性，可为变压器、电压互感器、电源中心、馈电中心和单元变电所提供限流保护。如正确应用，还可以保护设备免受强、弱故障电流的破坏。 NEMA标准针对E级中等电压保险丝的要求如下

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20E1CL5.5 数据手册

POWR-GARD^®Fuse Datasheet

E-RATED MEDIUM VOLTAGE FUSES

Description

Characteristics

E-rated fuses have time current characteristics designed to

provide current-limiting protection for power transformers,

potential transformers, power centers, feeder centers, and

unit sub stations. When properly applied, they can protect

against high and low fault currents.

Voltage Ratings

Current Range

2,750 V – 38,000 V

10E – 600E

Options

• Hermetically sealed for use in hazardous locations

(add “S” sufﬁx to part number)

NEMA Standards for E-rated medium voltage fuses require

that fuses rated 100E or less open within 300 seconds

(5 minutes) when subjected to an RMS value of 200-240%

of the fuse continuous current rating; and fuses with an

E rating larger than 100E must open within 600 seconds

(10 minutes) when subjected to an RMS current of 220-

240% of the fuse’s continuous current rating. These values

establish one point on the time-current curve.

• Clip-lock (CL) available.

Dimensions

6.38"

9.75"

3"DIA

Application Note

Since these fuses are used for the protection of general

purpose circuits which may contain transformers, motors,

and other equipment producing in-rush and/or overload

currents, fuses should generally be rated at 140% of the

normal full load current, and circuits should be analyzed

to ensure that system load currents will not exceed the

current rating of the fuse.

Dim.A

Clip

Center

Dim.B

Figure 4

Figure 5

Figure 6

ORDERING/CATALOG

MAX INTERRUPTING

RATING RMS (ASYM)*

FIGURE

NUMBER

SIZE

DIM. A (INCHES) DIM. B (INCHES)

E-RATED

NUMBER

10E1C2.75

15E1C2.75

10E

15E

20E

25E

30E

40E

50E

65E

80E

100E

125E

150E

200E

125E

150E

200E

250E

300E

350E

400E

450E

10.875"

80,000

20E1C2.75

25E1C2.75

30E1C2.75

40E1C2.75

50E1C2.75

65E1C2.75

80E1C2.75

100E-1C2.75

125E1C2.75

150E1C2.75

200E1C2.75

125E2C2.75

150E2C2.75

200E2C2.75

250E2C2.75

300E2C2.75

350E2C2.75

400E2C2.75

450E2C2.75

* RMS Asymmetrical amperes = RMS Symmetrical amperes x 1.6

Rev: 063014

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