Manual 26518V2
5009FT Installation/Hardware
Woodward
36
Using the graph in Figure 4-15, the intersection point between the 200
Ω
load resistance line and the 110
Vac line was found. From this intersection point it was determined that the voltage developed across the
load due to leakage current (when the relay is open) is approximately 7.5 Vac. This voltage level is lower
than the load’s 25 Vac drop-out voltage, thus Latent Fault detection can be used with this example circuit.
If, however, the load resistance was 1200
Ω
, the intersection would be approximately 29.5 Vac too high
for LFD. By following the graph along the 25 Vac line to the 110 V line, a total load resistance of 900
Ω
is
needed. By placing a properly rated 3600
Ω
resistor in shunt with the load, (1200//3600
900) LFD can be
used.
Figure 4-14. Latent Fault Detection Verification Graph—18–32 Vdc Circuitry
Released
Summary of Contents for MicroNet TMR 5009FT
Page 65: ...Manual 26518V2 5009FT Installation Hardware Woodward 63 Figure 8 4 DSLC Control Released...
Page 67: ...Manual 26518V2 5009FT Installation Hardware Woodward 65 Figure 8 5 Real Power Sensor Released...
Page 70: ...Manual 26518V2 5009FT Installation Hardware Woodward 68 Released...
Page 71: ...Manual 26518V2 5009FT Installation Hardware Woodward 69 Released...
Page 72: ...Manual 26518V2 5009FT Installation Hardware Woodward 70 Released...
Page 73: ...Manual 26518V2 5009FT Installation Hardware Woodward 71 Released...
Page 74: ...Manual 26518V2 5009FT Installation Hardware Woodward 72 Released...
Page 75: ...Manual 26518V2 5009FT Installation Hardware Woodward 73 Released...
Page 76: ...Manual 26518V2 5009FT Installation Hardware Woodward 74 Released...
Page 77: ...Manual 26518V2 5009FT Installation Hardware Woodward 75 Released...
Page 78: ...Manual 26518V2 5009FT Installation Hardware Woodward 76 Released...
Page 79: ...Manual 26518V2 5009FT Installation Hardware Woodward 77 Released...
Page 80: ...Manual 26518V2 5009FT Installation Hardware Woodward 78 Released...
Page 81: ...Manual 26518V2 5009FT Installation Hardware Woodward 79 Released...
Page 82: ...Manual 26518V2 5009FT Installation Hardware Woodward 80 Released...
Page 83: ...Manual 26518V2 5009FT Installation Hardware Woodward 81 Released...
Page 84: ...Manual 26518V2 5009FT Installation Hardware Woodward 82 Released...
Page 85: ...Manual 26518V2 5009FT Installation Hardware Woodward 83 Released...
Page 86: ...Manual 26518V2 5009FT Installation Hardware Woodward 84 Released...
Page 87: ...Manual 26518V2 5009FT Installation Hardware Woodward 85 Released...
Page 88: ...Manual 26518V2 5009FT Installation Hardware Woodward 86 Released...
Page 90: ...Manual 26518V2 5009FT Installation Hardware Woodward 88 Released...
Page 91: ...Manual 26518V2 5009FT Installation Hardware Woodward 89 Released...
Page 92: ...Manual 26518V2 5009FT Installation Hardware Woodward 90 Released...
Page 94: ...Manual 26518V2 5009FT Installation Hardware Woodward 92 Declarations Released...