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Single-phase Voltage Relay
K8AB-VS
CSM_K8AB-VS_DS_E_3_1
Ideal for voltage monitoring for industrial facilities and equipment.
* Monitor for overvoltages or undervoltages. * Manual resetting and automatically resetting supported by one Relay. * One SPDT output relay, 6 A at 250 VAC (resistive load). * Output relay can be switched between normally open and normally closed. * 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 23 4
1. Basic Model K8AB: Measuring and Monitoring Relays 2. Functions VS: Single-phase Voltage Relay (One-sided operation) 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-VS
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-VS1 24 VAC/DC K8AB-VS1 100-115 VAC K8AB-VS1 200-230 VAC K8AB-VS2 24 VAC/DC K8AB-VS2 100-115 VAC K8AB-VS2 200-230 VAC K8AB-VS3 24 VAC/DC K8AB-VS3 100-115 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 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-VS1 Range* 0 to 60 mV AC/DC 0 to 100 mV AC/DC 0 to 300 mV AC/DC K8AB-VS2 0 to 10 V AC/DC 0 to 30 V AC/DC 0 to 150 V AC/DC K8AB-VS3 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 k Approx. 230 k Approx. 260 k Approx. 120 k Approx. 320 k Approx. 1.6 M Approx. 1.2 M Approx. 1.7 M Approx. 3.1 M
Overload capacity Continuous input: 115% of maximum input 10 s max.: 125% of maximum input
2
K8AB-VS
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-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 100% operation at set value 5% to 50% of operating value 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. One SPDT relay (NO/NC switched using DIP switch.) Rated load Resistive load 6 A at 250 VAC (cos = 1) 6 A at 30 VDC (L/R = 0 ms) Inductive load 1 A at 250 VAC (cos = 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 60C (with no condensation or icing) -40 to 70C (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 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 Munsell 5Y8/1 PBT/ABS resin (self-extinguishing resin) UL94-V0 Approx. 130 g Mounted to DIN Track or via M4 screws (tightening torque: 1.2 N*m) 22.5 (W) x 90 (H) x 100 (D) mm Power consumption
Operating value setting range (SV)
Operating value Reset value setting range (HYS.) 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-VS
Specifications
Allowable power supply voltage range Allowable power supply frequency range Input frequency range Overload capacity Setting error Operating value Reset value Operating time Power ON lock time Repeat error Operating value Set value 0.5 s Operating value 2% Error calculation: Error = ((Maximum operating value - Minimum operating value (over 10 operations))/2)/ Average value x 100% Reset value 2% Error calculation: Error = ((Maximum reset value - Minimum reset value (over 10 resets))/2)/Average value x 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: -20C to standard temperature: 1,000 ppm/C max. Standard temperature to 60C: 1,000 ppm/C max. (Humidity: 25% to 80%) Operating time Fluctuation based on measured value at standard temperature: -20C to standard temperature: 10% max. Standard temperature to 60C: 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 M 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 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 1,500 V power supply terminal common/normal mode Square-wave noise of 1 s/100 ns pulse width with 1-ns rise time 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 100 m/s2, 3 times each in 6 directions along three axes (up/down, left/right, forward/backward) Terminal section: Finger protection 85% to 110% of power supply voltage 50/60 Hz 5 Hz DC input or AC input (40 to 500 Hz) Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input Set value 10% full scale
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-VS
Connections
Wiring Diagram
Overvoltage Operation Diagram (Output Relay Drive Method: Normally Closed)
DIP switch setting: SW3 ON.
Power supply voltage Operating value Input Flashing Alarm indicator Lit Relay 11-14 Relay 11-12 T: Operating time (0.1 to 30 s) T T1: Startup lock time (1 or 5 s)
Single-phase power
A1 Power supply voltage A2
Hysteresis (-5% to 50% of operating value)
V1 Voltage input V2 V3 14 Signal output 12 COM
Relay signal output
11
Load
T1
Note: There is no polarity when a DC current input is used.
Note: 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.
Undervoltage Operation Diagram (Output Relay Drive Method: Normally Open)
DIP switch setting: SW3 OFF.
Power supply voltage Input Operating value Flashing Alarm indicator Lit Relay 11-14 Relay 11-12 T: Operating time (0.1 to 30 s) T T1: Power ON lock (1 or 5 s) Hysteresis (5% to 50% of operating value)
T1
Note: 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.
5
K8AB-VS
Nomenclature
Front
Terminal block (See notes 1 and 2.)
Indicators
Item Power indicator (PWR: Green) Relay status indicator (RY: Yellow)
Voltage knob (SV)
Meaning Lit when power is being supplied. Lit when relay is operating Lit when there is an overvoltage or undervoltage. The indicator flashes to indicate the error status after the input has exceeded the threshold value while the operating time is being clocked.
Alarm indicator (ALM: Red)
Power indicator Hysteresis knob (HYS.) Relay status indicator Alarm indicator Operating time knob (T)
Setting Knobs
Item Voltage knob (SV)
Terminal block (See notes 1 and 2.)
Usage Used to set the voltage to 10% to 100% of maximum measuring voltage.
Hysteresis knob (HYS.) Used to set the rest value to 5% to 50% of the operating value. Operating time knob (T) Used to set the operating time to 0.1 to 30 s. Note: 1. Use either a solid wire of 2.5 mm2 maximum or a ferrule with insulating sleeve for the terminal connection. The length of the exposed current-carrying part inserted into the terminal must be 8 mm or less to maintain dielectric strength after connection.
For 2.5 mm2 or smaller solid wires For ferrules with insulating sleeves
8 mm max.
8 mm max.
Recommended ferrules Phoenix Contact * Al 1,5-8BK (for AWG16) * Al 1-8RD (for AWG18) * Al 0,75-8GY (for AWG18) 2. Tightening torque Recommended: 0.49 N*m Maximum: 0.54 N*m
6
K8AB-VS
Operation and Setting Methods
Setting Ranges and Wiring Connections
Model K8AB-VS1 Measuring current 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 Wiring connection V1-COM V2-COM V3-COM V1-COM V2-COM V3-COM V1-COM V2-COM V3-COM
Connections
1. Input Connect the input between terminals V1-COM, V2-COM, or V3-COM, depending on the input voltage. Malfunctions may occur if the input is connected to unused terminals and the Unit will not operate correctly 2. Power Supply Connect the power supply to terminals A1 and A2. 3. Outputs SPDT relays are output to terminals 11, 12, and 14. Note: Use the recommended ferrules if using twisted wires.
Voltage input Single-phase power
A1 Power supply voltage A2 V1 V2 V3 14 Signal output 12 COM
Relay signal output
11
Load
DIP Switch Settings
The power ON lock time, resetting method, relay drive method, and operating mode are set using the DIP switch located on the bottom of the Unit.
DIP Switch Functions
ON
SWITCH
ON OFF
4
ON OFF
3
2
1
OFF
SW1 SW2 SW3 SW4
Power ON lock time
DIP switch
5s 1s Automatic reset Manual reset Normally closed Normally open Undervoltage Overvoltage
------------
-------- -----
---- ---------
-------------
Resetting method Relay drive method Operating mode
Note: All pins are set to OFF at the factory.
7
K8AB-VS
Setting Method
1. Setting Voltage The voltage knob (SV) is used to set the voltage. The voltage can be set to 10% to 100% of the maximum measuring voltage. Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the same level.) Use this as a guide to set the voltage. The maximum measuring voltage will differ depending on the model and the input terminal. Example: K8AB-VS3 Using Input Terminal V3-COM The maximum measuring voltage will be 600 VAC/VDC and the setting range will be 60 to 600 V. 2. Hysteresis Hysteresis is set using the hysteresis knob (HYS.) The setting range is 5 to 50% of the operating value. Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the setting and the input have reached the same level.) Use this as a guide to set the hysteresis. Example: Maximum Setting of 600 VAC/VDC, Voltage Setting (SV) of 50%, and Overvoltage Operation Operation will be at 300 V and resetting at 270 V when the hysteresis (HYS.) is set to 10%. 3. Operating Time The operating time is set using the operating time knob (T). The operating time can be set to between 0.1 and 30 s. Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the same level.) Use this as a guide to set the operating time. If the input voltage exceeds (or drops lower than) the voltage setting, the alarm indicator will start flashing for the set period and then stay lit.
Dimensions
Single-phase Voltage Relays
K8AB-VS1 K8AB-VS2 K8AB-VS3
22.5 100 5
(Unit: mm)
90
72
5
Shunts
SDV-SH5 to SDV-SH50 (60-mV Rating)
140 120 25 D
SDV-SH75 to SDV-SH200 (60-mV Rating)
A B C
10.5 dia.
33 6 18 G E F
Model SDV-SH75
A
B
C
D
E 6 6 6 6
F 18 18 18 18
G 36 36 43 43
140 120 25 10.5
5.5 dia.
5.5 dia.
SDV-SH100 140 120 25 10.5 SDV-SH150 140 120 25 10.5 SDV-SH200 140 120 25 10.5
Current terminal: M6 screw Voltage terminal: M4 screw
Current terminal: M8 screw Voltage terminal: M4 screw
8
K8AB-VS
SDV-SH300/-SH500 (60-mV Rating)
A B C C E D D E 5
SDV-SH750/-SH1000 (60-mV Rating)
A B
Current terminal: M10 screw (SDV-SH300), M12 screw (SDV-SH500) Voltage terminal: M4 screw
Model SDV-SH300 SDV-SH500 A 130 160 B 30 40 C 110 120 D 4 6 E 36 41 Resistor 4 5
Current terminal: M12 screw Voltage terminal: M5 screw
Model SDV-SH750 SDV-SH1000 A 175 175 B 45 60 C 130 135 D 15 18 E 30 30
Note: Inquire about models with a rated current of 1,500 A or larger.
Questions and Answers
Q
Checking Operation
Q
How to Measure the Operating Time Overvoltage Change the input suddenly from 0% to 120% of the set value and measure the time until the Unit operates. Undervoltage Change the input suddenly from 120% to 0% of the set value and measure the time until the Unit operates.
Overvoltages Gradually increase the input from 80% of the setting. The input will equal the operating value when the input exceeds the setting and the alarm indicator starts flashing. Operation can be checked by the relay outputs that will start after the operating time has passed. Undervoltage Gradually decrease the input from 120% of the setting and check the operation using the same method as for overvoltage. Example: Overvoltage Operating Mode and an Operating Time of 5 s Note: K8AB-VS@ output relays are normally operative.
Set value Input voltage
Flashing
Q
Operating Adjustment Knobs Use a screwdriver to turn the knobs. There is a stopper to prevent the knob from turning any further once it has been turned completely to the left or right. Do not force the knob past these limits.
Lit
Alarm indicator Relay output
5s
Q
Detecting Current with a Current Splitter An example of detecting an overload is shown below.
Connection Diagram
Example: Overload detection in a distribution switch board installed in a power substation.
200 VAC
V 0 to 300 V
Variable autotransformer
Input terminals A1 A2
Power supply
DC power supply for distribution board
SDV-SH shunt
C 200 V (-)
Cycle counter
(+)
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.
Distribution switchboard K8AB-VS (without polarity)
9
Read and Understand This Catalog
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments.
Warranty and Limitations of Liability
WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified) from date of sale by OMRON. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY. In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted. IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the customer's application or use of the products. At the customer's request, OMRON will provide applicable third party certification documents identifying ratings and limitations of use that apply to the products. This information by itself is not sufficient for a complete determination of the suitability of the products in combination with the end product, machine, system, or other application or use. The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses listed may be suitable for the products: * Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this catalog. * Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles, safety equipment, and installations subject to separate industry or government regulations. * Systems, machines, and equipment that could present a risk to life or property. Please know and observe all prohibitions of use applicable to the products. NEVER USE THE PRODUCTS FOR AN 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.
PROGRAMMABLE PRODUCTS
OMRON shall not be responsible for the user's programming of a programmable product, or any consequence thereof.
Disclaimers
CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our practice to change model numbers when published ratings or features are changed, or when significant construction changes are made. However, some specifications of the products may be changed without any notice. When in doubt, special model numbers may be assigned to fix or establish key specifications for your application on your request. Please consult with your OMRON representative at any time to confirm actual specifications of purchased products.
DIMENSIONS AND WEIGHTS
Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.
PERFORMANCE DATA
Performance data given in this catalog is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of OMRON's test conditions, and the users must correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and Limitations of Liability.
ERRORS AND OMISSIONS
The information in this document has been carefully checked and is believed to be accurate; however, no responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.
2008.12 In the interest of product improvement, specifications are subject to change without notice.
Industrial Automation Company
http://www.ia.omron.com/
OMRON Corporation
(c)Copyright OMRON Corporation 2008 All Right Reserved.

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