RV4140 데이터 시트보기 (PDF) - Fairchild Semiconductor

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RV4140

Low Power Two-Wire Ground Fault Interrupter Controller

Fairchild Semiconductor 

PRODUCT SPECIFICATION

The value of RSET to meet nominal ground fault tip current

specification is:

RSET = -I--F---A----U---L----T----´-2---.-C0---5-O----´S-----N1---8---0---(---T-----¤--P----)-

Where:

• RSET is in kW

• T is the time delay in ms

• P is the period of the line frequency in ms

• IFAULT is the desired ground fault trip current in mA

RMS.

• N is the number of sense transformer secondary turns.

RV4140A

This formula assumes an ideal sense transformer is used.

The calculated value of RSET may have to be changed up to

30% when using a non-ideal transformer.

Mov

Line

Sense Transformer

1:500 Turns Ratio

3 Ring Steel Core

Hot

Neutral

RTEST

15K

C1

10 mF

C4

0.1m F

R SET

191K

C2

0.02 m F

1

8

2

7

RV4140A

3

6

4

5

Press to Test

Normally

Latching

Closed

Contacts

Solinoid

Q1

Tag

X0103DA

C3

10 nF

RLINE

91K

Figure 1. Appliance Leakage Detector Circuit Application

Load

65-4140A-02

3

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