RV4140 Fairchild Semiconductor, RV4140 Datasheet - Page 3

• Manufacturer Part Number: RV4140
• Description: Low Power Two-Wire Ground Fault Interrupter Controller
• Manufacturer: Fairchild Semiconductor

PRODUCT SPECIFICATION
The value of R
specification is:
Where:
• R
• T is the time delay in ms
• P is the period of the line frequency in ms
• I
• N is the number of sense transformer secondary turns.
Line
RMS.
FAULT
Mov
SET
R
SET
is in kW
is the desired ground fault trip current in mA
=
---------------------------------------------------------------
I
SET
FAULT
Sense Transformer
1:500 Turns Ratio
3 Ring Steel Core
to meet nominal ground fault tip current
´
2.05 N
COS 180
´
10 F
0.1 F
C1
C4
m
Figure 1. Appliance Leakage Detector Circuit Application
m
(
Neutral
T P ¤
Hot
)
191K
R
SET
1
2
3
4
0.02 F
RV4140A
C2
m
R
15K
TEST
8
7
6
5
This formula assumes an ideal sense transformer is used.
The calculated value of R
30% when using a non-ideal transformer.
Press to Test
Normally
Latching
Solinoid
X0103DA
10 nF
Contacts
C3
Tag
Closed
Q1
SET
may have to be changed up to
R
91K
LINE
65-4140A-02
RV4140A
Load
3