BA8K
BA8K
BA8K
K8AB Series
CSM_K8AB_series_Outline_DS_E_3_2
Industry First! Two SPDT Outputs Available in New Models DIN Sized at 22.5 mm
Eight slim models featuring a variety of innovative new functions. Single-phase power monitoring: Current relay Voltage relay Upper-/lower-limit voltage relays Three-phase power monitoring: Phase-sequence phase-loss relay (Detected at startup.) Voltage phase-sequence phase-loss relay * Asymmetry phase-sequence phase-loss relay * Voltage relay Temperature monitoring: Temperature alarm device
* Refer to the Q&A section for information on phase loss during operation.
Features
Slim 22.5-mm Design Features Two SPDT Relay Outputs (K8AB-VW, K8AB-PM, and K8AB-PW)
Provides individual over voltage and under voltage settings and outputs.
1-/3-phase Power Supply Many customers require the individual upper and lower limit outputs that are normally available only in larger 45-mm relays. For the first time from any manufacturer, OMRON has achieved this and more in a slim-body design measuring just 22.5 mm. These relays not only offer advantages such as 3-phase power supply compatibility and a resistive load contact capacity of 6 A at 250 VAC, but they also reduce panel production cost because they use 50% less space than previous models. Note: The relay output capacity for the K8AB-TH is 3 A at 250 VAC (resistive load).
AL1 AL2
Ry 1 Ry 2
AL1 AL2
Ry 1 Ry 2
AL1 AL2
Ry 1 Ry 2
Industry First
Expanded Setting Range Ensures Over Voltage and Under Voltage Monitoring Flexibility
Over voltage and under voltage can be set for the full span of the allowable input range, so over voltage and under voltage can now be monitored with flexibility. Note: The setting range for operation time can be set within 30% to +25% of the range selected using the DIP switch on the Unit.
Space Savings
Cut by 50%
(Compared with previous models)
Under voltage
Over voltage
600 VAC
Setting range
600 VAC
Setting range
DIN-sized at 22.5 mm
336 VAC
336 VAC
K8AB Series
Usable as a Simple Sensor Controller
Accepts inputs of 4 to 20 mA or 0 to 10 V.
Note: 1. The operating time can be set to 0.1 to 30 s. 2. SW1 of K8AB-AS is not used.
Flashing
Single K8AB Monitors 3-phase Power Supply with 3 or 4 Wires (K8AB-PM, K8AB-PA, and K8AB-PW)
OMRON Low-voltage Monitoring Relays can be used to monitor 3phase 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)
The trip alarm operates when the input reaches the operation range and the preset operation time has elapsed. Indicates a continuous trip.
Lit
Operation time
Operation time
L1
L2
L3
L1
L2
L3
400 VAC
230 VAC
400 VAC
400 VAC
230 VAC
A Single K8AB Can Monitor a 3-phase Power Supply Anywhere in the World
Reduces Maintenance Parts Inventory SW3 SW4 K8AB-P@1 K8AB-P@2 SW2 SW2 ON OFF ON OFF P-P P-N P-P P-N ON ON ON OFF OFF ON OFF OFF
200 V 220 V 230 V 240 V 115 V 127 V 133 V 138 V 380 V 400 V 415 V 480 V 220 V 230 V 240 V 277 V
Current 0 to 200 A AC K8AB-AS3 monitoring for (See note.) motors and heaters (using a special CT)
K8AB Series
Voltage Monitoring Applications (Single Phase)
Application Measured voltage Applicable models Operating value setting range 6 to 60 mV AC/DC 10 to 100 mV AC/DC 30 to 300 mV AC/DC
Wire Connection
2 2.5 mm2 solid or 2 1.5 mm2 standard ferrules.
Direct 0 to 60 mV DC K8AB-VS1 current 0 to 100 mV DC K8AB-VW1 monitoring 0 to 150 mV DC (monitoring the output voltage of a shunt) Power supply line monitoring 12 VDC 24 VDC 100 VAC 115 VAC 200 VAC 230 VAC 400 VAC 480 VAC K8AB-VS2 K8AB-VW2
K8AB-VS3 K8AB-VW3
Selection Guide
Product name 1-Phase Current Relay Model K8AB-AS1 Nominal input I1-COM: 2 to 20 mA AC/DC I2-COM: 10 to 100 mA AC/DC I3-COM: 50 to 500 mA AC/DC I1-COM: 0.1 to 1 A AC/DC I2-COM: 0.5 to 5 A AC/DC I3-COM: 0.8 to 8 A AC/DC I2-COM: 10 to 100 A AC I3-COM: 20 to 200 A AC V1-COM: 6 to 60 mV AC/DC V2-COM: 10 to 100 mV AC/DC V3-COM: 30 to 300 mV AC/DC V1-COM: 1 to 10 V AC/DC V2-COM: 3 to 30 V AC/DC V3-COM: 15 to 150 V AC/DC V1-COM: 20 to 200 V AC/DC V1-COM: 30 to 300 V AC/DC V1-COM: 60 to 600 V AC/DC V1-COM: 6 to 60 mV AC/DC V2-COM: 10 to 100 mV AC/DC V3-COM: 30 to 300 mV AC/DC V1-COM: 1 to 10 V AC/DC V2-COM: 3 to 30 V AC/DC V3-COM: 15 to 150 V AC/DC V1-COM: 20 to 200 V AC/DC V1-COM: 30 to 300 V AC/DC V1-COM: 60 to 600 V AC/DC 200 to 500 VAC 200, 220, 230, or 240 VAC 380, 400, 415, or 480 VAC 200, 220, 230, or 240 VAC 380, 400, 415, or 480 VAC 200, 220, 230, or 240 VAC 380, 400, 415, or 480 VAC
Thermocouple/Pt100 (0 to 399C/F) Thermocouple (setting unit of 10C/F) Thermocouple/Pt100 (0 to 399C/F) Thermocouple (setting unit of 10C/F)
K8AB-AS2 *1
K8AB-AS3 *2
K8AB-VS1
K8AB-VS2
K8AB-VS3
K8AB-VW1
K8AB-VW2
K8AB-VW3
Phase-sequence, Phase-loss Relay *3 3-Phase Voltage, Phase-sequence, Phase-loss Relay 3-Phase Asymmetry, Phase-sequence, Phase-loss Relay 3-Phase Voltage Relay Temperature Monitoring Relay
K8AB-PH1 K8AB-PM1 K8AB-PM2 K8AB-PA1 K8AB-PA2 K8AB-PW1 K8AB-PW2 K8AB-TH11S K8AB-TH12S K8AB-TH11S K8AB-TH12S
Supply voltage 24 V AC/DC 100 to 115 VAC 200 to 230 VAC 24 V AC/DC 100 to 115 VAC 200 to 230 VAC 24 V AC/DC 100 to 115 VAC 200 to 230 VAC 24 V AC/DC 100 to 115 VAC 200 to 230 VAC 24 V AC/DC 100 to 115 VAC 200 to 230 VAC 24 V AC/DC 100 to 115 VAC 200 to 230 VAC 24 V AC/DC 100 to 115 VAC 200 to 230 VAC 24 V AC/DC 100 to 115 VAC 200 to 230 VAC 24 V AC/DC 100 to 115 VAC 200 to 230 VAC Same as the input voltage.
One SPDT relay Two SPDT relays One SPDT relay Two SPDT relays
*1 K8AB-AS2 can use standardized CT. *2 The K8AC-CT200L CT is required to use with K8AB-AS3. *3 K8AB-PH can detect the phase-loss during motor operation.
K8AB Series
2. Functions Notation AS VS VW PH PM PA PW Meaning Single-phase Current Relay Single-phase Voltage Relay Single-phase Upper-/lower-limit Voltage Relay Phase-sequence Phase-loss Relay Operation One-sided operation One-sided operation Datasheet available Yes Yes
Three-phase Voltage Phase-sequence Simultaneous upper and Yes Phase-loss Relay lower limit monitoring Three-phase Asymmetry Phasesequence Phase-loss Relay Three-phase Voltage Relay --Yes
3. Rated Operating Power Note: For details, refer to the relevant Ordering Information.
K8AB-TH1@@
2 3 4
2. Functions Notation TH1 Temperature Alarm Device Meaning Operation One-sided operation
3. Setting range Notation 1 2 Meaning Low temperature range (0 to 399C set in increments of 1C) High temperature range (0 to 1700C set in increments of 10C)
K8AB Series
Application Examples
Chain Breakage Protection for Conveyors
K8AB-AS2 can use standardized CT!!
K8AB-AS
K8AB-VS
L1 L2 L3
Alarm
Alarm
Battery
Motor
Purpose
When the motor locks up, its rotational torque may break the chain. To prevent that from happening, the relay must trip the instant it detects a motor lock error. A thermal relay cannot be used for chain protection because it takes too long to start operating.
Fo r ob eign jec t
Purpose
The K8AB-VS is used to check battery charge levels.
Advantages
The K8AB-VS can detect when the battery charge is low.
Locked conveyor
Advantages
The K8AB-AS offers effective alarms because it starts operating in 0.1 s or less.
(If a motor is used as the load, be careful that the inrush current does not exceed the allowable input range.)
K8AB-VW
K8AB-AS
220 VAC
L1 L2 L3
Alarm
Alarm
Power supply monitoring
24 VDC
Voltage input level Under voltage Over voltage alarm indicator Under voltage alarm indicator Over voltage alarm relay Under voltage alarm relay Flashing Flashing Lit Lit
Purpose
A submersible pump will malfunction if it begins to operate out of water, so instantaneous detection of this kind of idle operation is essential.
T1
T1: 1 s or 5 s selection (Timer when the control power supply is turned ON.)
Advantages
The K8AB-AS can detect idle pump operation by detecting under current levels.
Purpose
Communications bases must be carefully monitored because the effects of a power outage or voltage drop would be highly detrimental to communications. This is why the K8AB-VW monitors the control panel power supply for over voltage and under voltage levels.
K8AB-AS
Advantages
It can detect over voltage and under voltage as well as output individual over voltage and under voltage alarms using SPDT relays.
Bulb External CT L
L L L L
Purpose
The K8AB-AS is used to detect burned out light bulbs.
Advantages
The K8AB-AS can detect burned out light bulbs by detecting under current levels. The Relay's sensitivity can be adjusted to detect burned out light bulbs even in applications where multiple light bulbs are used.
K8AB Series
Monitoring Phase Sequence/ Phase Loss for Escalators
Can detect the phase-loss during motor operation!!
K8AB-PH
K8AB-PW
L1 L2 L3
Contactor
Purpose
The K8AB-PH detects the phase sequence or phase loss in escalator power supplies.
Generator
Advantages
A single K8AB-PH can detect the phase sequence or phase loss at startup.
Motor
Purpose
The K8AB-PW monitors the voltage of power generated by a generator. It also detects over voltage and under voltage in power from a generator.
K8AB-PM
L1 L2 L3
Load
Advantages
A single K8AB-PW can monitor 3-phase voltage. It can also output individual alarms for over voltage and under voltage using SPDT relays because it features two outputs with SPDT relays. The voltage measurement range can be switched from 200 to 480 VAC and the K8AB-PW can be switched to monitor phase voltage or line voltage.
K8AB-PW
Purpose
J7L Contactor
Purpose
Compressors cannot operate correctly under conditions such as under voltage, asymmetry voltage, phase loss, or phase sequence. The K8AB-PM can be used to monitor 3-phase voltage, the phase sequence, and phase loss.
The K8AB-PW detects over voltage and under voltage in power generated by a wind-powered generator.
Advantages
Load
K8AB-PM 3-Phase voltage, phase-sequence, and phase-loss monitoring A single K8AB-PW can be used for a 3-phase power supply with 3 or 4 wires. It can be used to individually set and output over voltage and under voltage alarms.
Advantages
A single K8AB-PM can monitor over voltage, under voltage, the phase sequence and phase loss in 3-phase voltage. It can also output individual alarms for over voltage or under voltage using an SPDT relay. The K8AB-PM is able to recognize which alarm has occurred.
L1 L2 L3 N
Wind-powered generator
The application examples provided in this catalog are for reference only. Check functions and safety of the equipment before use. Never use the products for any application requiring special safety requirements, such as nuclear energy control systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles, safety equipment, or other application involving serious risk to life or property, without ensuring that the system as a whole has been designed to address the risks, and that the OMRON products are properly rated and installed for the intended use within the overall equipment or system.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527. In the interest of product improvement, specifications are subject to change without notice.