RV4140A_04 Datasheet, PDF (3/12 Pages) Fairchild Semiconductor – Low Power Two-Wire Ground Fault Interrupter Controller

PRODUCT SPECIFICATION
The value of RSET to meet nominal ground fault tip current
specification is:
R_SET = _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
R_TEST
15K
C1
10 ^m F
C4
0.1^m 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
R_{L NE}
91K
Figure 1. Appliance Leakage Detector Circuit Application
Load
65-4140A-02
3