K8AB Series Measuring and Monitoring Relays/Specifications | OMRON Industrial Automation Singapore

Model	Range *	Connection terminal	Measuring current	Input impedance	Overload capacity
K8AB-AS1	0 to 20 mA AC/DC	I1-COM	2 to 20 mA AC/DC, 10 to 100 mA AC/DC, 50 to 500 mA AC/DC	Approx. 5 Ω	Continuous input: 120% of maximum input 1 s max.: 150% of maximum input
	0 to 100 mA AC/DC	I2-COM		Approx. 1 Ω
	0 to 500 mA AC/DC	I3-COM		Approx. 0.2 Ω
K8AB-AS2	0 to 1 A AC/DC	I1-COM	0.1 to 1 A AC/DC, 0.5 to 5 A AC/DC, 0.8 to 8 A AC/DC	Approx. 0.12 Ω (Load: 0.5 VA)
	0 to 5 A AC/DC	I2-COM		Approx. 0.02 Ω (Load: 1.5 VA)
	0 to 8 A AC/DC	I3-COM		Approx. 0.02 Ω (Load: 3 VA)
K8AB-AS3	0 to 100 A AC	I2-COM	10 to 100 A AC, 20 to 200 A AC (See note.)	Using OMRON CT	Continuous input: 120% of maximum input 30 s max.: 200% of maximum input 1 s max.: 600% of maximum input
K8AB-AS3	0 to 200 A AC	I3-COM	10 to 100 A AC, 20 to 200 A AC (See note.)	Using OMRON CT

Note: The K8AB-AS3 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT).
(Direct input is not possible.)
* The range is selected using connected terminals.

Power supply voltage	Isolated power supply	24 VDC, 24 VAC, 100 to 115 VAC, 200 to 230 VAC
Power consumption		24 VDC: 1 W max. 24 VAC: 4 VA max. 100 to 115 VAC: 4 VA max. 200 to 230 VAC: 5 VA max.
Operating value setting range (SV)		10% to 100% of maximum measuring current K8AB-AS1: 2 to 20 mA AC/DC 10 to 100 mA AC/DC 50 to 500 mA AC/DC K8AB-AS2: 0.1 to 1 A AC/DC 0.5 to 5 A AC/DC 0.8 to 8 A AC/DC K8AB-AS3: When used together with a K8AC-CT200L Current Transformer 10 to 100 A AC 20 to 200 A AC
Operating value		100% operation at set value
Reset value setting range (HYS.)		5% to 50% of operating value
Reset method		Manual reset/automatic reset (switchable) Note: Manual reset: Turn OFF power supply for 1 s or longer.
Operating time setting range (T)		0.1 to 30 s
Startup lock time setting range (LOCK) Note: Enabled only for overcurrent operation.		0 to 30 s (The startup lock timer starts when the input has reached approximately 30% or more of the set value.) Note: Enabled only for overcurrent operation.
Indicators		Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Input impedance		Refer to Datasheet.
Output relays		One SPDT relay (NO/NC switched using DIP switch.)
Output relay ratings		Rated load Resistive load 6 A at 250 VAC (cosΦ = 1) 6 A at 30 VDC (L/R = 0 ms) Inductive load 1 A at 250 VAC (cos Φ = 0.4) 1 A at 30 VDC (L/R = 7 ms) Maximum contact voltage: 250 VAC Maximum contact current: 6 A AC Maximum switching capacity: 1,500 VA Minimum load: 10 mA at 5 VDC Mechanical life: 10,000,000 operations Electrical life: Make: 50,000 times, Break: 30,000 times
Ambient operating temperature		-20 to 60°C (with no condensation or icing)
Storage temperature		-40 to 70°C (with no condensation or icing)
Ambient operating humidity		25% to 85% (with no condensation)
Storage humidity		25% to 85% (with no condensation)
Altitude		2,000 m max.
Terminal screw tightening torque		0.49 Nm
Terminal wiring method		Recommended wire Solid wire: 2.5 mm² Twisted wires: AWG16, AWG18 Note: 1. Ferrules with insulating sleeves must be used with twisted wires. 2. Two wires can be twisted together. Recommended ferrules Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact Al 1-8RD (for AWG18) manufactured by Phoenix Contact Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color		Munsell 5Y8/1
Case material		PBT/ABS resin (self-extinguishing resin) UL94-V0
Weight		Approx. 130 g
Mounting		Mounted to DIN Track or via M4 screws (tightening torque: 1.2 Nm)
Dimensions		22.5 (W) × 90 (H) × 100 (D) mm


Allowable power supply voltage range		85% to 110% of power supply voltage
Allowable power supply frequency range		50/60 Hz ±5 Hz
Input frequency range		K8AB-AS1 and K8AB-AS2: DC input or AC input (45 to 65 Hz) K8AB-AS3: AC input (45 to 65 Hz)

Overload capacity		K8AB-AS1 and K8AB-AS2: Continuous input: 120% of maximum input, 1 s max.: 150% of maximum input. K8AB-AS3: Continuous input: 120% of maximum input, 30 s max.: 200% of maximum input, 1 s max.: 600% of maximum input Note: Overload capacity of primary side of CT.




Setting error	Operating value	Set value ± 10% full scale
	Reset value
	Operating time
	Startup lock time
Repeat error	Operating value	Operating value ±2% Error calculation: Error = ((Maximum operating value - Minimum operating value (over 10 operations))/2)/Average value × 100%


	Reset value	Reset value ±2% Error calculation: Error = ((Maximum reset value - Minimum reset value (over 10 resets))/2)/Average value × 100%


	Operating time	Operating time repeat error: ±50 ms Overcurrent: Measured when input suddenly changes from 0% to 120% of setting. Undercurrent: Measured when input suddenly changes from 120% to 0% of setting.




	Startup lock time	Startup lock time repeat error: ±50 ms (measured at sudden change from 0% to 120% of setting)
Temperature influence		Operating value Drift based on measured value at standard temperature: - 20 ° C to standard temperature: ±1,000 ppm/°C max. Standard temperature to 60°C: ±1,000 ppm/°C max. (Humidity: 25% to 80%) Operating time Fluctuation based on measured value at standard temperature: - 20°C to standard temperature: ± 10% max. Standard temperature to 60°C: ± 10% max. (Humidity: 25% to 80%)






Humidity influence		Operating value Based on ambient humidity of 65% 25% to 80%: ± 5% max. Operating time Based on ambient room humidity 25% to 80%: ± 10% max.






Influence of power supply voltage		Operating value: ± 5% max. Operating time: ± 10% max. Note: The error in the operating value and operating time under standard conditions.



Influence of power supply frequency		Operating value: ±5% max. (at 45 to 65 Hz) Operating time: ±10% max. (at 45 to 65 Hz) Note: The error in the operating value and operating time under standard conditions.



Influence of input frequency		Operating value (45 to 65 Hz) K8AB-AS1 and K8AB-AS2: ± 5% max. K8AB-AS3: ± 10% max. Operating time (45 to 65 Hz) ± 10% max. Note: The error in the operating value and operating time under standard conditions.






Applicable standards	Conforming standards	EN60255-5 and EN60255-6 Installation environment (Pollution Degree 2, Overvoltage Category III)
	Conforming standards
	EMC	EN61326
Insulation resistance		20 MΩ min. Between external terminals and case Between power supply terminals and input terminals (excluding models with DC power supply) Between power supply terminals and output terminals Between input terminals and output terminals






Dielectric strength		2,000 VAC for one minute Between external terminals and case Between power supply terminals and input terminals (excluding models with DC power supply) Between power supply terminals and output terminals Between input terminals and output terminals






Noise immunity		1,500 V power supply terminal common/normal mode Square-wave noise of ±1 μ s/100 ns pulse width with 1-ns rise time


Vibration resistance		Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s² 10 sweeps of 5 min each in X, Y, and Z directions


Shock resistance		100 m/s², 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Degree of protection		Terminal section: Finger protection

Model	Range*	Connection terminal	Measuring voltage	Input impedance	Overload capacity
K8AB-VS1	0 to 60 mV AC/DC	V1-COM	6 to 60 mV AC/DC, 10 to 100 mV AC/DC, 30 to 300 mV AC/DC	Approx. 220 kΩ	Continuous input: 115% of maximum input 10 s max.: 125% of maximum input
	0 to 100 mV AC/DC	V2-COM		Approx. 230 kΩ
	0 to 300 mV AC/DC	V3-COM		Approx. 260 kΩ
K8AB-VS2	0 to 10 V AC/DC	V1-COM	1 to 10 V AC/DC, 3 to 30 V AC/DC, 15 to 150 V AC/DC	Approx. 120 kΩ
	0 to 30 V AC/DC	V2-COM		Approx. 320 kΩ
	0 to 150 V AC/DC	V3-COM		Approx. 1.6 MΩ
K8AB-VS3	0 to 200 V AC/DC	V1-COM	20 to 200 V AC/DC, 30 to 300 V AC/DC, 60 to 600 V AC/DC	Approx. 1.2 MΩ
	0 to 300 V AC/DC	V2-COM		Approx. 1.7 MΩ
	0 to 600 V AC/DC	V3-COM		Approx. 3.1 MΩ

* The range is selected using connected terminals.

Power supply voltage	Isolated power supply	24 VDC, 24 VAC, 100 to 115 VAC, 200 to 230 VAC
Power consumption		24 VDC: 1 W max. 24 VAC: 4 VA max. 100 to 115 VAC: 4 VA max. 200 to 230 VAC: 5 VA max.
Operating value setting range (SV)		10% to 100% of maximum measuring voltage K8AB-VS1: 6 to 60 mV AC/DC 10 to 100 mV AC/DC 30 to 300 mV AC/DC K8AB-VS2: 1 to 10 V AC/DC 3 to 30 V AC/DC 15 to 150 V AC/DC K8AB-VS3: 20 to 200 V AC/DC 30 to 300 V AC/DC 60 to 600 V AC/DC
Operating value		100% operation at set value
Reset value setting range (HYS.)		5% to 50% of operating value
Reset method		Manual reset/automatic reset (switchable) Note: Manual reset: Turn OFF power supply for 1 s or longer.
Operating time setting range (T)		0.1 to 30 s
Power ON lock time (LOCK)		1 s or 5 s (Switched using DIP switch.)
Indicators		Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Input impedance		Refer to Datasheet.
Output relays		One SPDT relay (NO/NC switched using DIP switch.)
Output relay ratings		Rated load Resistive load 6 A at 250 VAC (cosΦ = 1) 6 A at 30 VDC (L/R = 0 ms) Inductive load 1 A at 250 VAC (cos Φ = 0.4) 1 A at 30 VDC (L/R = 7 ms) Maximum contact voltage: 250 VAC Maximum contact current: 6 A AC Maximum switching capacity: 1,500 VA Minimum load: 10 mA at 5 VDC Mechanical life: 10,000,000 operations Electrical life: Make: 50,000 times, Break: 30,000 times
Ambient operating temperature		-20 to 60°C (with no condensation or icing)
Storage temperature		-40 to 70°C (with no condensation or icing)
Ambient operating humidity		25% to 85% (with no condensation)
Storage humidity		25% to 85% (with no condensation)
Altitude		2,000 m max.
Terminal screw tightening torque		0.49 Nm
Terminal wiring method		Recommended wire Solid wire: 2.5 mm² Twisted wires: AWG16, AWG18 Note: 1. Ferrules with insulating sleeves must be used with twisted wires. 2. Two wires can be twisted together. Recommended ferrules Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact Al 1-8RD (for AWG18) manufactured by Phoenix Contact Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color		Munsell 5Y8/1
Case material		PBT/ABS resin (self-extinguishing resin) UL94-V0
Weight		Approx. 130 g
Mounting		Mounted to DIN Track or via M4 screws (tightening torque: 1.2 Nm)
Dimensions		22.5 (W) × 90 (H) × 100 (D) mm

	Reset value
Allowable power supply voltage range		85% to 110% of power supply voltage
Allowable power supply frequency range		50/60 Hz ±5 Hz
Input frequency range		DC input or AC input (40 to 500 Hz)
Overload capacity		Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input
Setting error	Operating value	Set value ± 10% full scale
	Operating time
	Power ON lock time	Set value ± 0.5 s
Repeat error	Operating value	Operating value ±2% Error calculation: Error = ((Maximum operating value - Minimum operating value (over 10 operations))/2)/Average value × 100%


	Reset value	Reset value ±2% Error calculation: Error = ((Maximum reset value - Minimum reset value (over 10 resets))/2)/Average value × 100%


	Operating time	Operating time repeat error: ±50 ms Overvoltage: Measured when input suddenly changes from 0% to 120% of setting. Undervoltage: Measured when input suddenly changes from 120% to 0% of setting.




	Power ON lock time	Power ON lock time repeat error: ±0.5 s (The operating time when the operating time is set to the minimum value and the power supply suddenly changes from 0% to 100%.)


Temperature influence		Operating value Drift based on measured value at standard temperature: - 20 ° C to standard temperature: ±1,000 ppm/°C max. Standard temperature to 60°C: ±1,000 ppm/°C max. (Humidity: 25% to 80%) Operating time Fluctuation based on measured value at standard temperature: - 20°C to standard temperature: ± 10% max. Standard temperature to 60°C: ± 10% max. (Humidity: 25% to 80%)






Humidity influence		Operating value Based on ambient humidity of 65% 25% to 80%: ± 5% max. Operating time Based on ambient room humidity 25% to 80%: ± 10% max.
Influence of power supply voltage		Operating value: ± 5% max. Operating time: ± 10% max. Note: The error in the operating value and operating time under standard conditions.




Influence of power supply frequency		Operating value: ±5% max. (at 45 to 65 Hz) Operating time: ±10% max. (at 45 to 65 Hz) Note: The error in the operating value and operating time under standard conditions.




Influence of input frequency		At 40 to 500 Hz Operating value ± 5% max. Operating time ± 10% max. Note: The error in the operating value and operating time under standard conditions.






Applicable standards	Conforming standards	EN60255-5 and EN60255-6 Installation environment (Pollution Degree 2, Overvoltage Category III)
	Conforming standards
	EMC	EN61326
	Safety standards	UL508
Insulation resistance		20 MΩ min. Between external terminals and case Between power supply terminals and input terminals (excluding models with DC power supply) Between power supply terminals and output terminals Between input terminals and output terminals







Dielectric strength		2,000 VAC for one minute Between external terminals and case Between power supply terminals and input terminals (excluding models with DC power supply) Between power supply terminals and output terminals Between input terminals and output terminals








Noise immunity		1,500 V power supply terminal common/normal mode Square-wave noise of ±1 μ s/100 ns pulse width with 1-ns rise time


Vibration resistance		Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s² 10 sweeps of 5 min each in X, Y, and Z directions


Shock resistance		100 m/s², 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Degree of protection		Terminal section: Finger protection

Model	Range*	Connection terminal	Measuring voltage	Input impedance	Overload capacity
K8AB-VW1	0 to 60 mV AC/DC	V1-COM	6 to 60 mV AC/DC, 10 to 100 mV AC/DC, 30 to 300 mV AC/DC	Approx. 220 kΩ	Continuous input: 115% of maximum input 10 s max.: 125% of maximum input
	0 to 100 mV AC/DC	V2-COM		Approx. 230 kΩ
	0 to 300 mV AC/DC	V3-COM		Approx. 260 kΩ
K8AB-VW2	0 to 10 V AC/DC	V1-COM	1 to 10 V AC/DC, 3 to 30 V AC/DC, 15 to 150 V AC/DC	Approx. 120 kΩ
	0 to 30 V AC/DC	V2-COM		Approx. 320 kΩ
	0 to 150 V AC/DC	V3-COM		Approx. 1.6 MΩ
K8AB-VW3	0 to 200 V AC/DC	V1-COM	20 to 200 V AC/DC, 30 to 300 V AC/DC, 60 to 600 V AC/DC	Approx. 1.2 MΩ
	0 to 300 V AC/DC	V2-COM		Approx. 1.7 MΩ
	0 to 600 V AC/DC	V3-COM		Approx. 3.1 MΩ

* The range is selected using connected terminals.

Power supply voltage	Isolated power supply	24 VDC, 24 VAC, 100 to 115 VAC, 200 to 230 VAC
Power consumption		24 VDC: 1 W max. 24 VAC: 4 VA max. 100 to 115 VAC: 4 VA max. 200 to 230 VAC: 5 VA max.
Operating value setting range (AL1 and AL2)		10% to 100% of maximum measuring voltage K8AB-VW1: 6 to 60 mV AC/DC 10 to 100 mV AC/DC 30 to 300 mV AC/DC K8AB-VW2: 1 to 10 V AC/DC 3 to 30 V AC/DC 15 to 150 V AC/DC K8AB-VW3: 20 to 200 V AC 30 to 300 V AC 60 to 600 V AC
Operating value		100% operation at set value
Reset value		5% of operating value (fixed)
Reset method		Manual reset/automatic reset (switchable) Note: Manual reset: Turn OFF power supply for 1 s or longer.
Operating time setting range (T)		0.1 to 30 s
Power ON lock time (LOCK)		1 s or 5 s (Switched using DIP switch.)
Indicators		Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Input impedance		Refer to Datasheet.
Output relays		Two SPDT relays (NC operation)
Output relay ratings		Rated load Resistive load 6 A at 250 VAC (cosΦ = 1) 6 A at 30 VDC (L/R = 0 ms) Inductive load 1 A at 250 VAC (cos Φ = 0.4) 1 A at 30 VDC (L/R = 7 ms) Maximum contact voltage: 250 VAC Maximum contact current: 6 A AC Maximum switching capacity: 1,500 VA Minimum load: 10 mA at 5 VDC Mechanical life: 10,000,000 operations Electrical life: Make: 50,000 times, Break: 30,000 times
Ambient operating temperature		-20 to 60°C (with no condensation or icing)
Storage temperature		-40 to 70°C (with no condensation or icing)
Ambient operating humidity		25% to 85% (with no condensation)
Storage humidity		25% to 85% (with no condensation)
Altitude		2,000 m max.
Terminal screw tightening torque		0.49 Nm
Terminal wiring method		Recommended wire Solid wire: 2.5 mm² Twisted wires: AWG16, AWG18 Note: 1. Ferrules with insulating sleeves must be used with twisted wires. 2. Two wires can be twisted together. Recommended ferrules Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact Al 1-8RD (for AWG18) manufactured by Phoenix Contact Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color		Munsell 5Y8/1
Case material		PBT/ABS resin (self-extinguishing resin) UL94-V0
Weight		Approx. 140 g
Mounting		Mounted to DIN Track or via M4 screws (tightening torque: 1.2 Nm)
Dimensions		22.5 (W) × 90 (H) × 100 (D) mm

	Operating time	Set value ± 10% full scale
Allowable power supply voltage range		85% to 110% of power supply voltage
Allowable power supply frequency range		50/60 Hz ±5 Hz
Input frequency range		40 to 500 Hz
Overload capacity		Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input
Setting error	Operating value	Set value ± 10% full scale
	Power ON lock time	Set value ± 0.5 s
Repeat error	Operating value	Operating value ±2% Error calculation: Error = ((Maximum operating value - Minimum operating value (over 10 operations))/2)/Average value × 100%


	Reset value	Overvoltage Operating value × 95% ±2% Undervoltage Operating value × 105% ±2% Error calculation: Error = ((Maximum reset value - Minimum reset value (over 10 resets))/2)/Average value × 100%




	Operating time	Operating time repeat error: ±50 ms Overvoltage: Measured when input suddenly changes from 0% to 120% of setting. Undervoltage: Measured when input suddenly changes from 120% to 0% of setting.




	Power ON lock time	Power ON lock time repeat error: ±0.5 s (The operating time when the operating time is set to the minimum value and the power supply suddenly changes from 0% to 100%.)


Temperature influence		Operating value Drift based on measured value at standard temperature: - 20 ° C to standard temperature: ±1,000 ppm/°C max. Standard temperature to 60°C: ±1,000 ppm/°C max. (Humidity: 25% to 80%) Operating time Fluctuation based on measured value at standard temperature: - 20°C to standard temperature: ± 10% max. Standard temperature to 60°C: ± 10% max. (Humidity: 25% to 80%)










Humidity influence		Operating value Based on ambient humidity of 65% 25% to 80%: ± 5% max. Operating time Based on ambient room humidity 25% to 80%: ± 10% max.






Influence of power supply voltage		Operating value: ± 5% max. Operating time: ± 10% max. Note: The error in the operating value and operating time under standard conditions.




Influence of power supply frequency		Operating value: ±5% max. (at 45 to 65 Hz) Operating time: ±10% max. (at 45 to 65 Hz) Note: The error in the operating value and operating time under standard conditions.




Influence of input frequency		At 40 to 500 Hz Operating value ±5% max. Operating time ±10% max. Note: The error in the operating value and operating time under standard conditions.






Applicable standards	Conforming standards	EN60255-5 and EN60255-6 Installation environment (Pollution Degree 2, Overvoltage Category III)
	Conforming standards
	EMC	EN61326
	Safety standards	UL508
Insulation resistance		20 MΩ min. Between external terminals and case Between power supply terminals and input terminals (excluding models with DC power supply) Between power supply terminals and output 1 terminals Between power supply terminals and output 2 terminals Between input terminals and output 1 terminals Between input terminals and output 2 terminals Between output 1 terminals and output 2 terminals







Dielectric strength		2,000 VAC for one minute Between external terminals and case Between power supply terminals and input terminals (excluding models with DC power supply) Between power supply terminals and output 1 terminals Between power supply terminals and output 2 terminals Between input terminals and output 1 terminals Between input terminals and output 2 terminals Between output 1 terminals and output 2 terminals







Noise immunity		1,500 V power supply terminal common/normal mode Square-wave noise of ±1 μ s/100 ns pulse width with 1-ns rise time


Vibration resistance		Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s² 10 sweeps of 5 min each in X, Y, and Z directions


Shock resistance		100 m/s², 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Degree of protection		Terminal section: Finger protection

Rated input voltage	Three-phase, three-wire mode, 200 to 500 VAC
Input load	15 VA max.
Reversed phase and phase loss operating time	0.1 s max.
Reset method	Automatic reset
Indicators	Power (PWR): Green, Relay output (RY): Yellow
Output relays	One SPDT relay (NC operation)
Output relay ratings	Rated load Resistive load 6 A at 250 VAC (cosΦ = 1) 6 A at 30 VDC (L/R = 0 ms) Inductive load 1 A at 250 VAC (cos Φ = 0.4) 1 A at 30 VDC (L/R = 7 ms) Maximum contact voltage: 250 VAC Maximum contact current: 6 A AC Maximum switching capacity: 1,500 VA Minimum load: 10 mA at 5 VDC Mechanical life: 1,000,000 operations Electrical life: Make: 50,000 times, Break: 30,000 times
Ambient operating temperature	-20 to 60°C (with no condensation or icing)
Storage temperature	-40 to 70°C (with no condensation or icing)
Ambient operating humidity	25% to 85% (with no condensation)
Storage humidity	25% to 85% (with no condensation)
Altitude	2,000 m max.
Terminal screw tightening torque	0.54 Nm
Terminal wiring method	Recommended wire Solid wire: 2.5 mm² Twisted wires: AWG16, AWG18 Note 1: Ferrules with insulating sleeves must be used with twisted wires. Note 2: Two wires can be twisted together. Recommended ferrules Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact Al 1-8RD (for AWG18) manufactured by Phoenix Contact Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color	Munsell 5Y8/1
Case material	ABS resin (self-extinguishing resin) UL94-V0
Weight	Approx. 110 g
Mounting	Mounted to DIN Track or via M4 screws (tightening torque: 1.2 Nm)
Dimensions	22.5 (W) × 90 (H) × 100 (D) mm

Input voltage range		200 to 500 VAC
Input frequency range		45 to 65 Hz
Overload capacity		Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input
Fixed Phase Asymmetry Monitoring		Output relay releases when one phase-phase voltage drops below 80% of the other phase-phase voltage.
Temperature influence		Operating time Fluctuation based on measured value at standard temperature: - 20°C to standard temperature: ± 10% max. Standard temperature to 60°C: ± 10% max. (Humidity: 25% to 80%)
Humidity influence		Operating time Based on ambient room humidity 25% to 80%: ± 10% max.
Influence of power supply voltage		Operating time: ± 10% max. Note: The error in the operating value and operating time under standard conditions.
Influence of power supply frequency		Operating time: ±10% max. (at 45 to 65 Hz) Note: The error in the operating value and operating time under standard conditions.
Influence of input frequency		At 45 to 65 Hz Operating time: ±10% max. Note: The error in the operating value and operating time under standard conditions.
Applicable standards	Conforming standards	EN60255-5 and EN60255-6 Installation environment (Pollution Degree 2, Overvoltage Category III)
	EMC	EN61326
	Safety standards	UL508
Insulation resistance		20 MΩ min. Between external terminals and case Between input terminals and output terminals
Dielectric strength		2,000 VAC for one minute Between external terminals and case Between input terminals and output terminals
Noise immunity		1,500 V power supply terminal common/normal mode Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance		Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s² 10 sweeps of 5 min each in X, Y, and Z directions
Shock resistance		100 m/s², 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Degree of protection		Terminal section: Finger protection

Rated input voltage	K8AB-PM1	Three-phase, three-wire Mode: 200, 220, 230 and 240 VAC Three-phase, four-wire Mode: 115, 127, 133 and 138 VAC
Rated input voltage	K8AB-PM2	Three-phase, three-wire Mode: 380, 400, 415 and 480 VAC Three-phase, four-wire Mode: 220, 230, 240 and 277 VAC
Input load		K8AB-PM1: 25 VA max. K8AB-PM2: 45 VA max.
Operating value setting range (OVER, UNDER)		Overvoltage - 30% to 25% of rated input voltage Undervoltage - 30% to 25% of rated input voltage Note: The rated input voltage can be switched using the DIP switch.
Operating value		100% operation at set value
Reset value		5% of operating value (fixed)
Reset method		Automatic reset
Operating time setting range (T)	Overvoltage/ undervoltage	0.1 to 30 s
Operating time setting range (T)	Reversed phase/ phase loss	0.1 s max.
Startup lock time (LOCK)		1 s or 5 s (Switched using DIP switch.)
Indicators		Power (PWR): Green, Relay output (RY): Yellow, OVER/UNDER: Red
Output relays		Two SPDT relays (NC operation)
Output relay ratings		Rated load Resistive load 6 A at 250 VAC (cosΦ = 1) 6 A at 30 VDC (L/R = 0 ms) Inductive load 1 A at 250 VAC (cos Φ = 0.4) 1 A at 30 VDC (L/R = 7 ms) Maximum contact voltage: 250 VAC Maximum contact current: 6 A AC Maximum switching capacity: 1,500 VA Minimum load: 10 mA at 5 VDC Mechanical life: 10,000,000 operations Electrical life: Make: 50,000 times, Break: 30,000 times
Ambient operating temperature		-20 to 60°C (with no condensation or icing)
Storage temperature		-40 to 70°C (with no condensation or icing)
Ambient operating humidity		25% to 85% (with no condensation)
Storage humidity		25% to 85% (with no condensation)
Altitude		2,000 m max.
Terminal screw tightening torque		0.49 Nm
Terminal wiring method		Recommended wire Solid wire: 2.5 mm² Twisted wires: AWG16, AWG18 Note: 1. Ferrules with insulating sleeves must be used with twisted wires. 2. Two wires can be twisted together. Recommended ferrules Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact Al 1-8RD (for AWG18) manufactured by Phoenix Contact Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color		Munsell 5Y8/1
Case material		ABS resin (self-extinguishing resin) UL94-V0
Weight		Approx. 130 g
Mounting		Mounted to DIN Track or via M4 screws (tightening torque: 1.2 Nm)
Dimensions		22.5 (W) × 90 (H) × 100 (D) mm

	Operating time	Set value ±10% of full scale
Input frequency range		45 to 65 Hz
Overload capacity		Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input
Setting error	Operating value	Set value ±10% of full scale
	Startup lock time	Set value ±0.5 s
Repeat error	Operating value	Operating value ±2% Error calculation: Error = ((Maximum operating value - Minimum operating value (over 10 operations))/2)/Average value × 100%


	Reset value	Overvoltage: Operating value x 95% ±2% Undervoltage: Operating value x 105% ±2% Error calculation: Error = ((Maximum reset value - Minimum reset value (over 10 resets))/2)/Average value × 100%




	Operating time	Operating time repeat error: ±50 ms Overvoltage: Measured when input suddenly changes from 70% to 120% of setting. Undervoltage: Measured when input suddenly changes from 120% to 70% of setting. The input voltage, however, must be between 70% and 125% of rating.






	Startup lock time	Startup lock time repeat error: ±0.5 s (The operating time when the operating time is set to the minimum value and the power supply suddenly changes from 0% to 100%.)


Temperature influence		Operating value Drift based on measured value at standard temperature: - 20 ° C to standard temperature: ±1,000 ppm/°C max. Standard temperature to 60°C : ±1,000 ppm/°C max. (Humidity: 25% to 80%) Operating time Fluctuation based on measured value at standard temperature: - 20°C to standard temperature: ± 10% max. Standard temperature to 60°C : ± 10% max. (Humidity: 25% to 80%)








Humidity influence		Operating value Based on ambient humidity of 65% 25% to 80%: ± 5% max. Operating time Based on ambient room humidity 25% to 80%: ± 10% max.





Influence of input frequency		At 45 to 65 Hz Operating value ± 5% max. Operating time ± 10% max. Note: The error in the operating value and operating time under standard conditions.




Applicable standards	Conforming standards	EN60255-5 and EN60255-6 Installation environment (Pollution Degree 2, Overvoltage Category III)
	Conforming standards
	EMC	EN61326
	Safety standards	UL508
Insulation resistance		20 MΩ min. Between external terminals and case Between input terminals and output 1 terminals Between input terminals and output 2 terminals Between output 1 terminals and output 2 terminals




Dielectric strength		2,000 VAC for one minute Between external terminals and case Between input terminals and output 1 terminals Between input terminals and output 2 terminals Between output 1 terminals and output 2 terminals



Noise immunity		1,500 V power supply terminal common/normal mode Square-wave noise of ±1 μ s/100 ns pulse width with 1-ns rise time


Vibration resistance		Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s² 10 sweeps of 5 min each in X, Y, and Z directions


Shock resistance		100 m/s², 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Degree of protection		Terminal section: Finger protection

Rated input voltage	K8AB-PA1	Three-phase, three-wire Mode: 200, 220, 230 and 240 VAC Three-phase, four-wire Mode: 115, 127, 133 and 138 VAC
Rated input voltage	K8AB-PA2	Three-phase, three-wire Mode: 380, 400, 415 and 480 VAC Three-phase, four-wire Mode: 220, 230, 240 and 277 VAC
Input load		K8AB-PA1: 25 VA max. K8AB-PA2: 45 VA max.
Operating value setting range (ASY.)		Asymmetry rate: 2% to 22%
Operating value		Asymmetry operating value = Rated input voltage × Asymmetry set value (%) The asymmetry operation will function when the potential difference between the highest and lowest voltage phases equals or exceeds the asymmetry operating value.
Reset value setting range (HYS.)		5% of operating value (fixed)
Reset method		Automatic reset
Operating time setting range (T)	Asymmetry	0.1 to 30 s
Operating time setting range (T)	Reversed phase/phase loss	0.1 s max.
Startup lock time (LOCK)		1 s or 5 s (Switched using DIP switch.)
Indicators		Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Output relays		One SPDT relay (NC operation)
Output relay ratings		Rated load Resistive load 6 A at 250 VAC (cosφ = 1) 6 A at 30 VDC (L/R = 0 ms) Inductive load 1 A at 250 VAC (cosφ = 0.4) 1 A at 30 VDC (L/R = 7 ms) Maximum contact voltage: 250 VAC Maximum contact current: 6 A AC Maximum switching capacity: 1,500 VA Minimum load: 10 mA at 5 VDC Mechanical life: 10,000,000 operations Electrical life: Make: 50,000 times, Break: 30,000 times
Ambient operating temperature		-20 to 60°C (with no condensation or icing)
Storage temperature		-40 to 70°C (with no condensation or icing)
Ambient operating humidity		25% to 85% (with no condensation)
Storage humidity		25% to 85% (with no condensation)
Altitude		2,000 m max.
Terminal screw tightening torque		0.49 Nm
Terminal wiring method		Recommended wire Solid wire: 2.5 mm² Twisted wires: AWG16, AWG18 Note: 1. Ferrules with insulating sleeves must be used with twisted wires. 2. Two wires can be twisted together. Recommended ferrules Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact Al 1-8RD (for AWG18) manufactured by Phoenix Contact Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color		Munsell 5Y8/1
Case material		ABS resin (self-extinguishing resin) UL94-V0
Weight		Approx. 120 g
Mounting		Mounted to DIN Track or via M4 screws (tightening torque: 1.2 Nm)
Dimensions		22.5 (W) × 90 (H) × 100 (D) mm

	Operating time	Set value ± 10% full scale
Input frequency range		45 to 65 Hz
Overload capacity		Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input
Setting error	Operating value	Set value ± 10% full scale
	Startup lock time	Set value ± 0.5 s
Repeat error	Operating value	Operating value ±2% Error calculation: Error = ((Maximum operating value - Minimum operating value (over 10 operations))/2)/Average value × 100%


	Reset value	Operating value × 95% ±2% Error calculation: Error = ((Maximum reset value - Minimum reset value (over 10 resets))/2)/Average value × 100%


	Operating time	Operating time repeat error: ±50 ms Asymmetry: Measured when the input suddenly changes from the three-phase asymmetry status to a difference between the maximum and minimum phases of 120% of the asymmetry operating value.


	Startup lock time	Startup lock time repeat error: ±0.5 s (The operating time when the operating time is set to the minimum value and the power supply suddenly changes from 0% to 100%.)
	Startup lock time
Temperature influence		Operating value Drift based on measured value at standard temperature: - 20 ° C to standard temperature: ±1,000 ppm/°C max. Standard temperature to 60°C: ±1,000 ppm/°C max. (Humidity: 25% to 80%) Operating time Fluctuation based on measured value at standard temperature: - 20°C to standard temperature: ± 10% max. Standard temperature to 60°C: ± 10% max. (Humidity: 25% to 80%)









Humidity influence		Operating value Based on ambient humidity of 65% 25% to 80%: ± 5% max. Operating time Based on ambient room humidity 25% to 80%: ± 10% max.










Influence of input frequency		At 45 to 65 Hz Operating value ±5% max. Operating time ±10% max. Note: The error in the operating value and operating time under standard conditions.






Applicable standards	Conforming standards	EN60255-5 and EN60255-6 Installation environment (Pollution Degree 2, Overvoltage Category III)
	EMC	EN61326
	Safety standards	UL508
Insulation resistance		20 MΩ min. Between external terminals and case Between input terminals and output terminals



Dielectric strength		2,000 VAC for one minute Between external terminals and case Between input terminals and output terminals




Noise immunity		1,500 V power supply terminal common/normal mode Square-wave noise of ±1 μ s/100 ns pulse width with 1-ns rise time


Vibration resistance		Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s² 10 sweeps of 5 min each in X, Y, and Z directions


Shock resistance		100 m/s², 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Degree of protection		Terminal section: Finger protection


Rated input voltage	K8AB-PW1	Three-phase, three-wire Mode: 200, 220, 230 and 240 VAC Three-phase, four-wire Mode: 115, 127, 133 and 138 VAC

	K8AB-PW2	Three-phase, three-wire Mode: 380, 400, 415 and 480 VAC Three-phase, four-wire Mode: 220, 230, 240 and 277 VAC


Input load		K8AB-PW1: 25 VA max. K8AB-PW2: 45 VA max.


Operating value setting range (OVER, UNDER)		Overvoltage -30% to 25% of rated input voltage Undervoltage -30% to 25% of rated input voltage Note: The rated input voltage can be switched using the DIP switch.




Operating value		100% operation at set value
Reset value		5% of operating value (fixed)
Reset method		Automatic reset
Operating time setting range (T)		Overvoltage and undervoltage: 0.1 to 30 s
Startup lock time (LOCK)		1 s or 5 s (Switched using DIP switch.)
Indicators		Power (PWR): Green, Relay output (RY): Yellow, OVER/UNDER: Red
Output relays		Two SPDT relays (NC operation)
Output relay ratings		Rated load Resistive load 6 A at 250 VAC (cosΦ = 1) 6 A at 30 VDC (L/R = 0 ms) Inductive load 1 A at 250 VAC (cos Φ = 0.4) 1 A at 30 VDC (L/R = 7 ms) Maximum contact voltage: 250 VAC Maximum contact current: 6 A AC Maximum switching capacity: 1,500 VA Minimum load: 10 mA at 5 VDC Mechanical life: 10,000,000 operations Electrical life: Make: 50,000 times, Break: 30,000 times












Ambient operating temperature		-20 to 60°C (with no condensation or icing)
Storage temperature		-40 to 70°C (with no condensation or icing)
Ambient operating humidity		25% to 85% (with no condensation)
Storage humidity		25% to 85% (with no condensation)
Altitude		2,000 m max.
Terminal screw tightening torque		0.49 Nm
Terminal wiring method		Recommended wire Solid wire: 2.5 mm² Twisted wires: AWG16, AWG18 Note: 1. Ferrules with insulating sleeves must be used with twisted wires. 2. Two wires can be twisted together. Recommended ferrules Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact Al 1-8RD (for AWG18) manufactured by Phoenix Contact Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact










Case color		Munsell 5Y8/1
Case material		ABS resin (self-extinguishing resin) UL94-V0
Weight		Approx. 130 g
Mounting		Mounted to DIN Track or via M4 screws (tightening torque: 1.2 Nm)
Dimensions		22.5 (W) × 90 (H) × 100 (D) mm

	Operating time	Set value ±10% of rated input voltage
Input frequency range		45 to 65 Hz
Overload capacity		Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input
Setting error	Operating value	Set value ±10% of rated input voltage
	Startup lock time	Set value ±0.5 s
Repeat error	Operating value	Operating value ±2% Error calculation: Error = ((Maximum operating value - Minimum operating value (over 10 operations))/2)/Average value × 100%


	Reset value	Overvoltage: Operating value x 95% ±2% Undervoltage: Operating value x 105% ±2% Error calculation: Error = ((Maximum reset value - Minimum reset value (over 10 resets))/2)/ Average value × 100%





	Operating time	Operating time repeat error: ±50 ms Overvoltage: Measured when input suddenly changes from 70% to 120% of setting. Undervoltage: Measured when input suddenly changes from 120% to 70% of setting. The input voltage, however, must be between 70% and 125% of rating.






	Startup lock time	Startup lock time repeat error: ±0.5 s (The operating time when the operating time is set to the minimum value and the power supply suddenly changes from 0% to 100%.)


Temperature influence		Operating value Drift based on measured value at standard temperature: - 20 ° C to standard temperature: ±1,000 ppm/°C max. Standard temperature to 60°C : ±1,000 ppm/°C max. (Humidity: 25% to 80%) Operating time Fluctuation based on measured value at standard temperature: - 20°C to standard temperature: ± 10% max. Standard temperature to 60°C : ± 10% max. (Humidity: 25% to 80%)









Humidity influence		Operating value Based on ambient humidity of 65% 25% to 80%: ± 5% max. Operating time Based on ambient room humidity 25% to 80%: ± 10% max.





Influence of input frequency		At 45 to 65 Hz Operating value ± 5% Operating time ± 10% Note: The error in the operating value and operating time under standard conditions.



Applicable standards	Conforming standards	EN60255-5 and EN60255-6 Installation environment (Pollution Degree 2, Overvoltage Category III)
	Conforming standards
	EMC	EN61326
	Safety standards	UL508
Insulation resistance		20 MΩ min. Between external terminals and case Between input terminals and output 1 terminals Between input terminals and output 2 terminals Between output 1 terminals and output 2 terminals




Dielectric strength		2,000 VAC for one minute Between external terminals and case Between input terminals and output 1 terminals Between input terminals and output 2 terminals Between output 1 terminals and output 2 terminals




Noise immunity		1,500 V power supply terminal common/normal mode Square-wave noise of ±1 μ s/100 ns pulse width with 1-ns rise time


Vibration resistance		Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s² 10 sweeps of 5 min each in X, Y, and Z directions


Shock resistance		100 m/s², 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Degree of protection		Terminal section: Finger protection

Note: The reset value is valid only for automatic resets.

Power supply voltage		100 to 240 VAC 50/60 Hz	24 VAC 50/60 Hz or 24 VDC
Allowable voltage range		85% to 110% of power supply voltage
Power consumption		5 VA max.	2 W max. (24 VDC), 4 VA max. (24 VAC)
Sensor inputs	K8AB-TH11S	Thermocouple: K, J, T, E; Platinum-resistance thermometer: Pt100
Sensor inputs	K8AB-TH12S	Thermocouple: K, J, T, E, B, R, S, PLII
Output relay		One SPDT relay (3 A at 250 VAC, resistive load)
External inputs (for latch setting)	Contact input	ON: 1 kΩ max., OFF: 100 kΩ min.
	Non-contact input	ON residual voltage: 1.5 V max., OFF leakage current: 0.1 mA max.
		Leakage current: Approx. 10 mA
Setting method		Rotary switch setting (set of three switches)
Indicators		Power (PWR): Green LED, Relay output (ALM): Red LED
Other functions		Alarm Mode (upper limit/lower limit), non-fail safe/fail safe selection, output latch, setting protection, temperature unit °C/°F
Ambient operating temperature		-10 to 55°C (with no condensation or icing)
Ambient operating humidity		Relative humidity: 25% to 85%
Storage temperature		-25 to 65°C (with no condensation or icing)

Setting accuracy		±2.0% of full scale
hysteresis width		2°C
Output relay	Resistive load	3 A at 250 VAC (cosΦ = 1), 3 A at 30 VDC (L/R = 0 ms)
	Inductive load	1 A at 250 VAC (cosΦ = 0.4), 1 A at 30 VDC (L/R = 7 ms)
	Minimum load	10 mA at 5 VDC
	Maximum contact voltage	250 VAC
	Maximum contact current	3 A AC
	Maximum switching capacity	1,500 VA
	Mechanical life	10,000,000 operations
	Electrical life	Make: 50,000 times, Break: 30,000 times
Sampling cycle		500 ms
Insulation resistance		20 MΩ (at 500 V) between charged terminals and exposed uncharged parts 20 MΩ (at 500 V) between any charged terminals (i.e., between input, output, and power supply terminals) 20 MΩ (at 500 V) between contacts (open)
Dielectric strength		2,000 VAC 50/60 Hz for 1 min between charged terminals of different polarity
Vibration resistance		Vibration of 10 to 55 Hz and acceleration of 50 m/s² for 5 min with 10 sweeps each in X, Y, and Z directions
Shock resistance		150 m/s² (100 m/s² for relay contacts) 3 times each in 6 directions in X, Y, and Z directions
Weight		130 g
Degree of protection		IP20
Memory protection		Non-volatile memory (number or writes: 200,000)
Safety Standards	Approved standards	UL 61010-1, CSA C22.2 No. 1010-1, KOSHA
	EMC	EN 61326
	Application standards	EN 61010-1 (pollution level 2, overvoltage category II)
EMC		EMI: EN 61326 Radiation Interference Field Intensity: EN 55011 Group 1 Class A Noise Terminal Voltage: EN 55011 Group 1 Class A EMS: EN 61326 Immunity ESD: EN 61000-4-2: 4 kV contact discharge (level 2), 8 kV air discharge (level 3) Immunity RF: EN 61000-4-3: 10 V/m, amplitude-modulated (80 MHz to 1 GHz, 1.4 GHz to 2 GHz) (level 3) Immunity Burst: EN 61000-4-4: 2 kV power line (level 3), 2 kV output line (relay output) (level 4), 1 kV measurement line and I/O signal lines (level 4) Immunity Conducted Disturbance: EN 61000-4-6: 3 V (0.15 to 80 MHz) (level 3) Immunity Surge: EN 61000-4-5: 1 kV line-to-line: power line, output line (relay output) (level 2), 2 kV line-to-ground: power line, output line (relay output) (level 3) Commercial Frequency Immunity Magnetic Field: EN 61000-4-8: 30 A/m (50Hz) continuous time Immunity Voltage Dip/Interrupting: EN 61000-4-11: 0.5 cycle, 100% (rated voltage)
Terminal screw tightening torque		0.54 to 0.55 Nm
Crimp terminals		Two solid wires of 2.5 mm² or two ferrules of 1.5 mm² with insulation sleeves can be tightened together.
Case color		Munsell 5Y8/1 (ivory)
Case material		ABS resin (self-extinguishing resin)
Mounting		Mounted to DIN Track or with M4 screws
Dimensions		22.5 × 100 × 90 mm (W × D × H)

K8AB Series

Eight slim models featuring a variety of innovative new functions

K8AB-AS
Single-phase Current Relay

Input Range

Ratings

Specifications

K8AB-VS
Single-phase Voltage Relay

Input Range

Ratings

Specifications

K8AB-VW
Single-phase Voltage Relay

Input Range

Ratings

Specifications

K8AB-PH
Phase-sequence Phase-loss Relay

Ratings

Specifications

K8AB-PM
Three-phase Phase-sequence Phase-loss Relay

Ratings

Specifications

K8AB-PA
Three-phase Asymmetry and Phase-sequence Phase-loss Relay

Ratings

Specifications

K8AB-PW
Three-phase Voltage Relay

Ratings

Specifications

K8AB-TH
Temperature Monitoring Relay

Ratings

Characteristics

Setting Ranges

K8AB-TH11S

Centigrade

Fahrenheit

K8AB-TH12S

Centigrade

Fahrenheit

Product Category

K8AB Series

Eight slim models featuring a variety of innovative new functions

K8AB-ASSingle-phase Current Relay

Input Range

Ratings

Specifications

K8AB-VSSingle-phase Voltage Relay

Input Range

Ratings

Specifications

K8AB-VWSingle-phase Voltage Relay

Input Range

Ratings

Specifications

K8AB-PHPhase-sequence Phase-loss Relay

Ratings

Specifications

K8AB-PMThree-phase Phase-sequence Phase-loss Relay

Ratings

Specifications

K8AB-PAThree-phase Asymmetry and Phase-sequence Phase-loss Relay

Ratings

Specifications

K8AB-PWThree-phase Voltage Relay

Ratings

Specifications

K8AB-THTemperature Monitoring Relay

Ratings

Characteristics

Setting Ranges

K8AB-TH11S

Centigrade

Fahrenheit

K8AB-TH12S

Centigrade

Fahrenheit

Product Category

K8AB-AS
Single-phase Current Relay

K8AB-VS
Single-phase Voltage Relay

K8AB-VW
Single-phase Voltage Relay

K8AB-PH
Phase-sequence Phase-loss Relay

K8AB-PM
Three-phase Phase-sequence Phase-loss Relay

K8AB-PA
Three-phase Asymmetry and Phase-sequence Phase-loss Relay

K8AB-PW
Three-phase Voltage Relay

K8AB-TH
Temperature Monitoring Relay