K8AK Datasheet, PDF (58/88 Pages) Omron Electronics LLC – Measuring & Monitoring Relays

Three-phase Phase-sequence Phase-loss Relay
K8AK-PM
Ideal for monitoring 3-phase power
supplies for industrial facilities and
equipment.
• Greater resistance to inverter noise.
• Monitor overvoltages, undervoltages, phase sequence,
and phase loss for three-phase 3-wire or 4-wire power
supplies with just one Unit.
Switch setting for 3-phase 3-wire or 3-phase 4-wire power
supply.
• Two SPDT output relays, 5 A at 250 VAC (resistive load).
Output overvoltages and undervoltages using separate
relays.
• World-wide power specifications supported by one Unit
(switchable).
• Output status can be monitored using LED indicator.
• RoHS-compliant.
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
Refer to Safety Precautions for the K8AK Series on page 86.
Refer to page 65 to 66 for commonly asked questions.
●Single K8AK Monitors 3-phase Power Supply with 3 or 4 Wires
Monitoring Relays can be used to monitor 3-phase power supplies with 3 or 4 wires simply by changing DIP switch settings.
Phase to phase voltage (3 wires) Phase to neutral voltage (4 wires)
L1 L2 L3
L1 L2 L3 N
400VAC
230VAC
400VAC
230VAC
400VAC
230VAC
A Single K8AK Can Monitor a 3-phase Power Supply Anywhere in the World
Reduces Maintenance Parts Inventory
K8AK-PM1
K8AK-PM2
SW3
SW4
ON
P-N
SW2
OFF
P-P
ON
P-N
SW2
OFF
P-P
ON
ON
138 V
240V
277 V
480 V
ON
OFF
133 V
230 V
240 V
415 V
OFF
ON
127 V
220 V
230 V
400 V
OFF
OFF
115 V
200 V
220 V
380 V
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