K8AB-PM 查看數據表（PDF） - OMRON Corporation
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产品描述 (功能)
比赛名单
K8AB-PM Datasheet PDF : 10 Pages
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Connections
K8AB-PM
■ Wiring Diagram
Overvoltage/Undervoltage and Phase Sequence/Phase Loss Operation Diagram
Overvoltage
setting value
L1
Input
L2
L3
Undervoltage setting value
Overvoltage alarm indicator
Undervoltage alarm indicator
Flashing
Lit
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Flashing
Lit
T
T: Operating time (0.1 to 30 s)
Overvoltage relay
Undervoltage relay
L1
Input L2
L3
Undervoltage alarm indicator
T T: Operating time (0.1 to 30 s)
T1: Power ON lock (1 s or 5 s)
T1
Phase loss operation
Phase sequence operation
L1 L3 L1
L3 L2 L2
L2 L1 L3
Flashing Flashing
Undervoltage relay
Note: 1. The K8AB-PM output relay is normally operative.
2. The power ON lock prevents unnecessary alarms from being generated during the
instable period when the power is first turned on. There is no relay output during timer
operation.
3. Phase loss is detected by L1, L2, and L3 voltage drops.
A phase loss will exist if any of the phases drops below 60% of the rated input.
4. L1 and L2 function both as the power supply terminals and as input terminals. If the
voltage drops dramatically, then the Relay will not operate due to an undervoltage.
5. Motor load phase loss cannot be detected during operation.
6. Phase loss is detected based on voltage, so phase loss cannot be detected on the
load side.
N L1 L2 L3
Voltage input
L1
L2
N
L3
14
11
Signal output
12 Overvoltage
Load
24
Signal output
21
22 Undervoltage
Phase loss,
reversed phase
Operation Indicators
Item
Display
Contact operation
Ry_LED Over_LED Under_LED Over_Ry Under_Ry
Overvoltage ON
ON
Off
Off
ON
Undervolt- ON
OFF
ON
age
ON
OFF
Phase loss OFF
OFF
ON
(See note
1.)
OFF
OFF
(See note
1.)
Reversed ON
phase
OFF
Flashing ON
(See note
2.)
OFF
Correct
ON
OFF
OFF
ON
ON
phase
Note: 1. While phase loss is detected, Over_Ry will also be OFF.
2. The indicator will flash once per second after a phase loss
is detected and once per 0.5 second during the detection
time.
4
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