Global
These are navigation links to move inside this page.
SitemapMeasuring and Monitoring Relays
K8AB
Eight slim models featuring a variety of innovative new functions
Data Sheet (Overview) (965KB)
Quick links to 'K8AB' page in your country / territory.
-
- Middle East
-
Please contact our European headquarters.
Get more support via Products links, such as manuals and CAD files.
List of Models
K8AB-AS
Single-phase Current Relay
| Single-phase Current Relay | Measuring current | Supply voltage | Model |
 | 2 to 20 mA AC/DC, 10 to 100 mA AC/DC, 50 to 500 mA AC/DC | 24 VAC/DC | K8AB-AS1 24 VAC/DC |
| 100-115 VAC | K8AB-AS1 100-115 VAC | ||
| 200-230 VAC | K8AB-AS1 200-230 VAC | ||
| 0.1 to 1 A AC/DC, 0.5 to 5 A AC/DC, 0.8 to 8 A AC/DC | 24 VAC/DC | K8AB-AS2 24 VAC/DC | |
| 100-115 VAC | K8AB-AS2 100-115 VAC | ||
| 200-230 VAC | K8AB-AS2 200-230 VAC | ||
| 10 to 100 A AC, 20 to 200 A AC (See note.) | 24 VAC/DC | K8AB-AS3 24 VAC/DC | |
| 100-115 VAC | K8AB-AS3 100-115 VAC | ||
| 200-230 VAC | K8AB-AS3 200-230 VAC |
Note:The K8AB-AS3 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT). (Direct input is not possible.)
Accessory (Order Separately)
OMRON CT
| Current Transformer | Input range | Applicable Relay | Model |
 | 10 to 100 A AC, 20 to 200 A AC | K8AB-AS3 | K8AC-CT200L |
Other CTs
| CT current on secondary side | Applicable Relay |
| 0 to 1 A AC, 0 to 5 A AC | K8AB-AS2 |
K8AB-VS
Single-phase Voltage Relay
| Single-phase Voltage Relay | Measuring voltage | Supply voltage | Model |
 | 6 to 60 mV AC/DC, 10 to 100 mV AC/DC, 30 to 300 mV AC/DC | 24 VAC/DC | K8AB-VS1 24 VAC/DC |
| 100-115 VAC | K8AB-VS1 100-115 VAC | ||
| 200-230 VAC | K8AB-VS1 200-230 VAC | ||
| 1 to 10 V AC/DC, 3 to 30 V AC/DC, 15 to 150 V AC/DC | 24 VAC/DC | K8AB-VS2 24 VAC/DC | |
| 100-115 VAC | K8AB-VS2 100-115 VAC | ||
| 200-230 VAC | K8AB-VS2 200-230 VAC | ||
| 20 to 200 V AC/DC, 30 to 300 V AC/DC, 60 to 600 V AC/DC | 24 VAC/DC | K8AB-VS3 24 VAC/DC | |
| 100-115 VAC | K8AB-VS3 100-115 VAC | ||
| 200-230 VAC | K8AB-VS3 200-230 VAC |
Shunts (Order Separately)
A shunt is a resistor to convert a DC current into a DC voltage.
Use the shunt in combination with K8AB-VS to detect undercurrent and overcurrent in DC circuits.
| Model | Rated current | Output voltage |
| SDV-SH5 | 5 A | 60 mV |
| SDV-SH7.5 | 7.5 A | |
| 7.5 A (for 100 mV) | 100 mV | |
| SDV-SH10 | 10 A | 60 mV |
| SDV-SH15 | 15 A | |
| SDV-SH20 | 20 A | |
| SDV-SH30 | 30 A | |
| SDV-SH50 | 50 A | |
| SDV-SH75 | 75 A | |
| SDV-SH100 | 100 A | |
| SDV-SH150 | 150 A | |
| SDV-SH200 | 200 A | |
| SDV-SH300 | 300 A | |
| SDV-SH500 | 500 A | |
| SDV-SH750 | 750 A | |
| SDV-SH1000 | 1,000 A |
Characteristics
SDV-SH5 (Rated Current: 5 A)
Note:
1.All the above listed shunts have an accuracy in the 1.0 class.
2.Select a shunt whose rated current is more than 120% of the current normally flowing in a circuit. The characteristics of the shunt may change or fusing of a resistor element may occur if an overload that is 1,000% of the rated current is applied. Therefore, determine the rated current of the shunt to be used, by taking the circuit conditions into account.
K8AB-VW
Single-phase Voltage Relay
| Single-phase Voltage Relay | Measuring voltage | Supply voltage | Model |
 | 6 to 60 mV AC/DC, 10 to 100 mV AC/DC, 30 to 300 mV AC/DC | 24 VAC/DC | K8AB-VW1 24 VAC/DC |
| 100-115 VAC | K8AB-VW1 100-115 VAC | ||
| 200-230 VAC | K8AB-VW1 200-230 VAC | ||
| 1 to 10 V AC/DC, 3 to 30 V AC/DC, 15 to 150 V AC/DC | 24 VAC/DC | K8AB-VW2 24 VAC/DC | |
| 100-115 VAC | K8AB-VW2 100-115 VAC | ||
| 200-230 VAC | K8AB-VW2 200-230 VAC | ||
| 20 to 200 V AC/DC, 30 to 300 V AC/DC, 60 to 600 V AC/DC | 24 VAC/DC | K8AB-VW3 24 VAC/DC | |
| 100-115 VAC | K8AB-VW3 100-115 VAC | ||
| 200-230 VAC | K8AB-VW3 200-230 VAC |
Shunts (Order Separately)
A shunt is a resistor to convert a DC current into a DC voltage.
Use the shunt in combination with K8AB-VW to detect undercurrent and overcurrent in DC circuits.
| Model | Rated current | Output voltage |
| SDV-SH5 | 5 A | 60 mV |
| SDV-SH7.5 | 7.5 A | |
| 7.5 A (for 100 mV) | 100 mV | |
| SDV-SH10 | 10 A | 60 mV |
| SDV-SH15 | 15 A | |
| SDV-SH20 | 20 A | |
| SDV-SH30 | 30 A | |
| SDV-SH50 | 50 A | |
| SDV-SH75 | 75 A | |
| SDV-SH100 | 100 A | |
| SDV-SH150 | 150 A | |
| SDV-SH200 | 200 A | |
| SDV-SH300 | 300 A | |
| SDV-SH500 | 500 A | |
| SDV-SH750 | 750 A | |
| SDV-SH1000 | 1,000 A |
Characteristics
SDV-SH5 (Rated Current: 5 A)
Note
1.All the above listed shunts have an accuracy in the 1.0 class.
2.Select a shunt whose rated current is more than 120% of the current normally flowing in a circuit. The characteristics of the shunt may change or fusing of a resistor element may occur if an overload that is 1,000% of the rated current is applied. Therefore, determine the rated current of the shunt to be used, by taking the circuit conditions into account.
K8AB-PH
Phase-sequence Phase-loss Relay
| Phase-sequence Phase-loss Relay | Functions | Rated input voltage (See note.) | Model |
 | Phase sequence and phase loss monitoring | 200 to 500 VAC | K8AB-PH1 |
Note:The power supply is shared with the rated input voltage.
K8AB-PM
Three-phase Phase-sequence Phase-loss Relay
| Three-phase Phase-sequence Phase-loss Relay | Rated input (See note 2.) | Model | |
 | 3-phase 3-wire mode | 200, 220, 230, 240 VAC | K8AB-PM1 |
| 3-phase 4-wire mode | 115, 127, 133, 138 VAC | ||
| 3-phase 3-wire mode | 380, 400, 415, 480 VAC | K8AB-PM2 | |
| 3-phase 4-wire mode | 220, 230, 240, 277 VAC | ||
Note
1.Three-phase 3-wire or 4-wire and the input range are switched using a DIP switch.
2.The power supply is shared with the rated input voltage.
K8AB-PA
Three-phase Asymmetry and Phase-sequence Phase-loss Relay
| Three-phase Asymmetry and Phase-sequence Phase-loss Relay | Rated input (See note 2.) | Model | |
 | 3-phase 3-wire mode | AC 200, 220, 230, 240 | K8AB-PA1 |
| 3-phase 4-wire mode | AC 115, 127, 133, 138 | ||
| 3-phase 3-wire mode | AC 380, 400, 415, 480 | K8AB-PA2 | |
| 3-phase 4-wire mode | AC 220, 230, 240, 277 | ||
Note
1.Three-phase, three-wire or four-wire and the input range are switched using a DIP switch.
2.The power supply voltage is the same as the rated input voltage.
K8AB-PW
Three-phase Voltage Relay
| Three-phase Voltage Relay | Rated input (See note 2.) | Model | |
 | 3-phase 3-wire mode | 200, 220, 230, 240 VAC | K8AB-PW1 |
| 3-phase 4-wire mode | 115, 127, 133, 138 VAC | ||
| 3-phase 3-wire mode | 380, 400, 415, 480 VAC | K8AB-PW2 | |
| 3-phase 4-wire mode | 220, 230, 240, 277 VAC | ||
Note
1.Three-phase, three-wire or four-wire and the input range are switched using a DIP switch.
2.The power supply voltage is the same as the rated input voltage.
K8AB-TH
Temperature Monitoring Relay
| Size | Supply voltage | Type | Number of outputs | Input type | Setting unit (setting range) | Model |
| K8AB-TH 22.5 × 90 × 100 mm | 100 to 240 VAC | Temperature input | 1 (relay) | Thermocouple/Pt100 | Unit: 1°C/°F (0 to 399°C/°F) | K8AB-TH11S |
| Thermocouple | Unit: 10°C/°F (See note 1.) | K8AB-TH12S | ||||
| 24 VAC/VDC | Thermocouple/Pt100 | Unit: 1°C/°F (0 to 399°C/°F) | K8AB-TH11S | |||
| Thermocouple | Unit: 10°C/°F (See note 1.) | K8AB-TH12S |
Note:
1.Refer to Data Sheet for setting ranges.
2.Specify the power supply voltage when ordering. Different models must be ordered for 100 to 240 VAC and 24 VAC/DC.
Top of page
