CS294
Ground Fault Interrupter
Features
Description
The CS294 is an AC outlet ground
an SCR are required as external
components. The completed inter-
rupter circuit can detect and protect
against both hot wire to ground
faults and neutral wire to ground
faults.
ꢀ Supply Derived from
fault interrupter controller IC. The
IC detects the presence of haz-
ardous grounding conditions and
open circuits the AC line before a
dangerous shock can occur.
AC Supply — 24V
ꢀ Direct Interface to SCR
ꢀ Adjustable Sensitivity
ꢀ Grounded Neutral Fault
The CS294 contains an operational
amplifier, an SCR driver and a 24V
zener shunt regulator. Two sense
coils, a bridge rectifier, a relay and
The CS294 is built on a 30V bipolar
process and is available in 8 lead
DIP packages.
Detection
Block Diagram
AmpOUT
+VS
−
+
50kΩ
VFB
Package Options
20kΩ
−
Signal
Common
SCR
Trigger
8 Lead PDIP
+
10kΩ
Filter
−
+
VFB
Filter
Detect
1
AmpOUT
+VS
Bias
4.7kΩ
Signal Common
Gnd
SCR Trigger
Gnd
Detect
ON Semiconductor
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885–3600 Fax: (401)885–5786
N. American Technical Support: 800-282-9855
Web Site: www.onsemi.com
April, 2001 - Rev. 4
1