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RV4145A Datasheet

  • RV4145A

  • Low Power Ground Fault Interrupter

  • 11頁

  • FAIRCHILD

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RV4145A
Low Power Ground Fault Interrupter
Features
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No potentiomenter required
Direct interface to SCR
Supply voltage derived from AC line 鈥?26V shunt
Adjustable sensitivity
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Grounded neutral fault detection
Meets U.L. 943 standards
450碌A(chǔ) quiescent current
Ideal for 120V or 220V systems
Description
The RV4145A is a low power controller for AC outlet
ground fault interrupters. These devices detect hazardous
grounding conditions, such as equipment (connected to
opposite phases of the AC line) in contact with a pool of
water and open circuits the line before a harmful or lethal
shock occurs.
Contained internally are a 26V zener shunt regulator, an op
amp, and an SCR driver. WIth the addition of two sense
transformers, a bridge recti鏗乪r, an SCR, a relay, and a few
additional components, the RV4145A will detect and protect
against both hot wire to ground and neutral wire to ground
faults. The simple layout and conventional design ensure
ease of application and long-term reliability.
Block Diagram
RV4145A
V
FB
R1
10K
R2
10K
V
REF
(+13V)
+V
S
(+26V)
+Input
Op Amp Output
6.5V
6.5V
6.5V
6.5V
Ground
R3
4.7K
65-4145A-01
SCR Trigger
REV. 1.0.3 3/6/02

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