SDV-FL2 DC24 Omron, SDV-FL2 DC24 Datasheet - Page 17
SDV-FL2 DC24
Manufacturer Part Number
SDV-FL2 DC24
Description
Sensor Hardware & Accessories VOLTAGE SENSOR
Manufacturer
Omron
Specifications of SDV-FL2 DC24
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Reverse-phase Detecting Circuit
The current reverse-phase detecting method is employed for detect-
ing reverse-phase as shown below. After the motor starts operating,
the current phase becomes transiently unstable during T1 (approx.
0.1 s) and so reverse-phase detection is not performed during this
period but it is performed during T2 (approx. 0.2 s). After T2 has
elapsed, reverse-phase detection is not performed. For this reason,
this method cannot be applied to cases where instantaneous
reverse-phase is not permitted. When a reverse-phase is detected,
the relay is held in the latched state even after the motor current
stops (in both manual and automatic release types).
2. Voltage Reverse-phase Detection Models
Reverse-phase Detecting Circuit
Reverse-phase detecting is performed by using the voltage reverse-
phase detection method.
By voltage division within the above RC phase circuit, the output
becomes 0 V in the normal state or 1.5 V
state. Using the output from this circuit, the reverse-phase level
detecting circuit detects when the current reaches the reverse-phase
operating level (80% or less of the control power supply).
Motor
Start
W
U
V
T
1
T
2
Reverse-phase output
uv
in the reverse-phase
Non-detecting area
Detecting area
Motor Protective Relay
K2CM
15
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