K8AB-VW 데이터 시트보기 (PDF) - OMRON Corporation

부품명

상세내역

제조사

K8AB-VW

Single-phase Voltage Relay

OMRON Corporation 

Questions and Answers

Q Checking Operation

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, Undervoltage Operating

Mode and an Operating Time of 5 s

Note: K8AB-VW@ output relays are normally operative.

Set value

Input voltage

Alarm indicator

Relay output

Flashing

Lit

5s

Connection Diagram

200 VAC

Input terminals

V 0 to 300 V

Variable

autotransformer

A1

Power supply

A2

± C 200 V

Cycle counter

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.

K8AB-VW

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.

Q Setting the Pre-alarm Monitoring Mode

Use the DIP switch to set the operating mode pins both to

overvoltage (SW3 ON and SW4 OFF) or both to

undervoltage (SW3 OFF and SW4 ON).

Example: Both Pins Set to Overvoltage

AL1 can be used as the pre-alarm for AL2 by

setting a smaller voltage set value for AL1 than for

AL2.

Q Detecting Current with a Current Splitter

An example of detecting an overload is shown below.

Example: Overload detection in a distribution switch

board installed in a power substation.

DC power

supply for

distribution

board

SDV-SH

shunt

(−)

K8AB-VW

(+)

(without polarity)

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.

9

Share Link: