K8AB-PM2 Omron Automation, K8AB-PM2 Datasheet - Page 4

• Manufacturer Part Number: K8AB-PM2
• Description: RELAY; POWER; 3 PHASE; 380, 400, 415, 480 VAC-3WIRE; 220, 230, 240, 277 VAC-4WIRE
• Manufacturer: Omron Automation

Specifications of K8AB-PM2

• Lead Free Status / Rohs Status: RoHS Compliant part

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