Single-phase Voltage Relay
K8AB-VW
CSM_K8AB-VW_DS_E_3_1
Ideal for voltage monitoring for industrial
facilities and equipment.
• Monitor for overvoltages and undervoltages simultaneously.
Separate settings and outputs supported for overvoltages and
undervoltages.
• Manual resetting and automatically resetting supported by one
Relay.
• Pre-alarm Monitoring Mode.
• Two SPDT output relays, 6 A at 250 VAC (resistive load).
• Process control signal (0 to 10 V) and current splitter input
supported.
• Output status can be monitored using LED indicator.
• Input frequency of 40 to 500 Hz supported.
• Inputs are isolated from the power supply.
Refer to
Safety Precautions for the K8AB
Series.
Refer to page 9 for the Q&A section.
Model Number Structure
■
Model Number Legend
K8AB-@@
1
2 3
4
1. Basic Model
K8AB:
Measuring and Monitoring Relays
2. Functions
VW:
Single-phase Voltage Relay (Simultaneous upper and lower limit monitoring)
3. Measuring Current
1:
6 to 60 mV AC/DC, 10 to 100 mV AC/DC, 30 to 300 mV AC/DC
2:
1 to 10 V AC/DC, 3 to 30 V AC/DC, 15 to 150 V AC/DC
3:
20 to 200 V AC/DC, 30 to 300 V AC/DC, 60 to 600 V AC/DC
4. Supply Voltage
24 VAC/DC: 24 VAC/DC
100-115 VAC: 100 to 115 VAC
200-230 VAC: 200 to 230 VAC
1
K8AB-VW
Ordering Information
■
List of Models
Single-phase Voltage Relay
Measuring voltage
6 to 60 mV AC/DC,
10 to 100 mV AC/DC,
30 to 300 mV AC/DC
1 to 10 V AC/DC,
3 to 30 V AC/DC,
15 to 150 V AC/DC
20 to 200 V AC/DC,
30 to 300 V AC/DC,
60 to 600 V AC/DC
Supply voltage
24 VAC/DC
100-115 VAC
200-230 VAC
24 VAC/DC
100-115 VAC
200-230 VAC
24 VAC/DC
100-115 VAC
200-230 VAC
Model
K8AB-VW1 24 VAC/DC
K8AB-VW1 100-115 VAC
K8AB-VW1 200-230 VAC
K8AB-VW2 24 VAC/DC
K8AB-VW2 100-115 VAC
K8AB-VW2 200-230 VAC
K8AB-VW3 24 VAC/DC
K8AB-VW3 100-115 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
SDV-SH5
SDV-SH7.5
SDV-SH10
SDV-SH15
SDV-SH20
SDV-SH30
SDV-SH50
SDV-SH75
SDV-SH100
SDV-SH150
SDV-SH200
SDV-SH300
SDV-SH500
SDV-SH750
SDV-SH1000
5A
7.5 A
7.5 A (for 100 mV)
10 A
15 A
20 A
30 A
50 A
75 A
100 A
150 A
200 A
300 A
500 A
750 A
1,000 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.
5
Rated current
Output voltage
60 mV
100 mV
60 mV
Characteristics
SDV-SH5 (Rated Current: 5 A)
Output voltage (mV)
Shunt rated
at 60 mV
60
Input current (A)
Ratings and Specifications
■
Input Range
Model
K8AB-VW1
Range*
0 to 60 mV AC/DC
0 to 100 mV AC/DC
0 to 300 mV AC/DC
K8AB-VW2
0 to 10 V AC/DC
0 to 30 V AC/DC
0 to 150 V AC/DC
K8AB-VW3
0 to 200 V AC/DC
0 to 300 V AC/DC
0 to 600 V AC/DC
* The range is selected using connected terminals.
Connection terminal
V1-COM
V2-COM
V3-COM
V1-COM
V2-COM
V3-COM
V1-COM
V2-COM
V3-COM
Measuring voltage
6 to 60 mV AC/DC,
10 to 100 mV AC/DC,
30 to 300 mV AC/DC
1 to 10 V AC/DC,
3 to 30 V AC/DC,
15 to 150 V AC/DC
20 to 200 V AC/DC,
30 to 300 V AC/DC,
60 to 600 V AC/DC
Input impedance
Approx. 220 kΩ
Approx. 230 kΩ
Approx. 260 kΩ
Approx. 120 kΩ
Approx. 320 kΩ
Approx. 1.6 MΩ
Approx. 1.2 MΩ
Approx. 1.7 MΩ
Approx. 3.1 MΩ
Overload capacity
Continuous input:
115% of maximum input
10 s max.:
125% of maximum input
2
K8AB-VW
■
Ratings
Power supply
voltage
Isolated power supply
24 VDC, 24 VAC, 100 to 115 VAC, 200 to 230 VAC
24 VDC:
1 W max.
24 VAC:
4 VA max.
100 to 115 VAC: 4 VA max.
200 to 230 VAC: 5 VA max.
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
100% operation at set value
5% of operating value (fixed)
Manual reset/automatic reset (switchable)
Note:
Manual reset: Turn OFF power supply for 1 s or longer.
0.1 to 30 s
1 s or 5 s (Switched using DIP switch.)
Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Refer to "Input Range" on previous page.
Two SPDT relays (NC operation)
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
−20
to 60°C (with no condensation or icing)
−40
to 70°C (with no condensation or icing)
25% to 85% (with no condensation)
25% to 85% (with no condensation)
2,000 m max.
0.49 N·m
Recommended wire
Solid wire:
2.5 mm
2
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
Munsell 5Y8/1
PBT/ABS resin (self-extinguishing resin) UL94-V0
Approx. 140 g
Mounted to DIN Track or via M4 screws (tightening torque: 1.2 N·m)
22.5 (W)
×
90 (H)
×
100 (D) mm
Power consumption
Operating value setting range (AL1 and AL2)
Operating value
Reset value
Reset method
Operating time setting range (T)
Power ON lock time (LOCK)
Indicators
Input impedance
Output relays
Output relay ratings
Ambient operating temperature
Storage temperature
Ambient operating humidity
Storage humidity
Altitude
Terminal screw tightening torque
Terminal wiring method
Case color
Case material
Weight
Mounting
Dimensions
3
K8AB-VW
■
Specifications
Allowable power supply voltage range
Allowable power supply frequency range
Input frequency range
Overload capacity
Setting error
Operating value
Operating time
Power ON lock time
Repeat error
Operating value
85% to 110% of power supply voltage
50/60 Hz
±5
Hz
40 to 500 Hz
Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input
Set value
±10%
full scale
Set value
±
0.5 s
Operating value
±2%
Error calculation: Error = ((Maximum operating value
−
Minimum operating value (over 10 operations))/2)/
Average value
×
100%
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 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 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%.)
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%)
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.
Operating value:
±5%
max.
Operating time:
±10%
max.
Note:
The error in the operating value and operating time under standard conditions.
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.
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.
EN60255-5 and EN60255-6
Installation environment (Pollution Degree 2, Overvoltage Category III)
EN61326
UL508
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
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
1,500 V power supply terminal common/normal mode
Square-wave noise of ±1
µs/100
ns pulse width with 1-ns rise time
Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s
2
10 sweeps of 5 min each in X, Y, and Z directions
100 m/s
2
, 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Terminal section: Finger protection
Reset value
Operating time
Power ON lock time
Temperature influence
Humidity influence
Influence of power supply voltage
Influence of power supply frequency
Influence of input frequency
Applicable
standards
Conforming standards
EMC
Safety standards
Insulation resistance
Dielectric strength
Noise immunity
Vibration resistance
Shock resistance
Degree of protection
4
K8AB-VW
Connections
■
Wiring Diagram
Overvoltage and Undervoltage
Operation Diagram
DIP switch settings: SW3 and SW4 both ON or both OFF.
Power supply voltage
Overvoltage setting (AL1)
Hysteresis: Fixed at 5%
Undervoltage and Undervoltage
Operation Diagram (Undervoltage Pre-
alarm Mode)
DIP switch settings: SW3 OFF and SW4 ON.
Power supply voltage
Input
Undervoltage set value (AL1)
Hysteresis: Fixed at 5%
Undervoltage set value (AL2)
Hysteresis: Fixed at 5%
Input
Undervoltage set value (AL2)
Flashing
AL1 alarm indicator
Flashing
AL2 alarm indicator
Overvoltage (AL1) relay
Lit
Lit
Hysteresis: Fixed at 5%
T
T: Operating time (0.1 to 30 s)
AL1 alarm indicator
Flashing
Lit
Flashing
AL2 alarm indicator
Lit
Undervoltage (AL2) relay
T
T1
T: Operating time (0.1 to 30 s)
Undervoltage (AL1) relay
Undervoltage (AL2) relay
T1: Power ON lock (1 s or 5 s)
T1: Power ON lock (1 s or 5 s)
Note: 1.
The K8AB-VW output relay is normally operative.
2.
The power ON lock prevents unnecessary alarms from
being generated during the instable period when the power
is first turned on. There is no relay output during timer
operation.
T1
Note: 1.
The K8AB-VW output relay is normally operative.
2.
The power ON lock prevents unnecessary alarms from
being generated during the instable period when the power
is first turned on. There is no relay output during timer
operation.
Single-phase power
Overvoltage and Overvoltage
Operation Diagram (Overvoltage Pre-
alarm Mode)
DIP switch settings: SW3 ON and SW4 OFF.
Power supply voltage
A1
Power supply
voltage
A2
V1
Overvoltage setting (AL1)
Hysteresis: Fixed at 5%
Overvoltage setting (AL2)
Hysteresis: Fixed at 5%
Input
Flashing
Voltage input
V2
V3
COM
AL1 alarm indicator
AL2 alarm indicator
Overvoltage (AL1) relay
Overvoltage (AL2) relay
Flashing
Lit
Lit
14
Signal output
12
24
Signal output
22
11
AL1 relay
signal
output
21
AL2 relay
signal
output
T1: Power ON lock (1 s or 5 s)
T1
Load
Note: 1.
The K8AB-VW output relay is normally operative.
2.
The power ON lock prevents unnecessary alarms from
being generated during the instable period when the power
is first turned on. There is no relay output during timer
operation.
Note:
There is no polarity when a DC current input is used.
5
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