DWB02CM2310A - Carlo Gavazzi Group

Specifications are subject to change without notice (09.12.05) 1

Monitoring Relays

3-Phase Active power

Types DWB02, PWB02

•TRMS active power relays for three phase

balanced applications

•Measuring if active power is within set limits

•Measuring voltage on own power supply

•Measuring ranges: 5A, 10A, MI current transformers

•Power ON delay 1 to 30 s knob selectable

•Separately adjustable upper/lower level on relative

scale

•Programmable latching or inhibit at set level

•Automatic and manual start and stop of the system

•Output: 8 A SPDT relay N.D. or N.E. selectable

•For mounting on DIN-rail in accordance with DIN/EN

50 022 (DWB02) or plug-in module (PWB02)

•45 mm Euronorm housing (DWB02) or 36 mm plug-in

module (PWB02)

•LED indication for relay, alarm and power supply ON

Product Description

DWB02 and PWB02 are

precise TRMS active power

monitoring relays for 3-

phase balanced systems.

They can be used for moni-

toring the actual load of

asynchronous motors and

other symmetrical loads, as

well as the power consump-

tion by of system.

Start/stop input allows to use

amanual switch to startand

stop the system, without the

need of an auxiliary device.

The advantage of using the

latch function is that the alarm

status can be kept even after

the end of the alarm condi-

tion. Inhibit function can be

used to avoid relay operation

when not desired (mainte-

nance, transitions).

The LED's indicate the state of

the alarmand the output relay.

Input Specifications

Input

Voltage (Own power supply):

3-phase DWB02: L1, L2, L3

PWB02: 5, 6, 7

M23: 208 to 240 VAC ± 15%

DWB02CM48: 380 to 480 VAC ± 15%

PWB02CM48: 380 to 415 VAC ±15%

DWB02CM69: 600 to 690 VAC ± 15%

1- phase DWB02CM23: L1, L2

PWB02CM23: 5, 6

208 to 240 VAC ± 15%

Current: DWB02: 5A, 10A: I1, I2

MI...:U1, U2

PWB02: 5A, 10A: 11, 10

MI...: 9, 8

Measuring ranges Upper level Lower level

Active power 10 to 110 % 10 to 110 %

AACrms Max. curr.

(30s)

Direct input: 0.5 to 5A 30A

1 to 10A 50A

Standard CT (examples)

TADK2 50 A/5 A 5 to 50 A 60 A

TAD2 150 A/5 A 15 to 150 A 180 A

TAD6 400 A/5 A 40 to 400 A 480 A

TAD12 1000 A/5 A 100 to 1000 A 1200 A

TACO200 6000 A/5 A 600 to 6000 A 7200 A

MI CT ranges

MI 100 10 to 100 A 250 AAC

MI 500 50 to 500 A 750 AAC

Note:

The input voltage cannot

raise over 300 VAC with

respect to ground (PWB02

only)

Contact input

DWB02 Terminals Z1, U2

PWB02 Terminals 2, 9

Disabled > 10 kΩ

Enabled <500 Ω

Pulse width > 500 ms

Hysteresis ~2% of set value - fixed

DWB02 PWB02

Ordering key

Housing

Function

Type

Item number

Output

Power Supply

Range

DWB 02 C M48 10A

Type Selection

Mounting Output Supply: Supply: Supply: Supply:

208 to 240 VAC 380 to 415 VAC 380 to 480 VAC 600 to 690 VAC

DIN-rail SPDT DWB 02 C M23 10A DWB 02 C M48 10A DWB02 C M69 10A

Plug-in SPDT PWB 02 C M23 10A PWB 02 C M48 10A

2Specifications are subject to change without notice (09.12.05)

DWB02, PWB02

Supply Specifications

General Specifications

Power supply Overvoltage cat. III

Rated operational voltage (IEC 60664, IEC 60038)

Through terminals:

DWB02: L1, L2, L3

PWB02: 5, 6, 7

M23 177 to 276 VAC 45 to 65 Hz

DWB02CM48 323 to 552 VAC 45 to 65 Hz

PWB02CM48 323 to 477 VAC 45 to 65 Hz

DWB02CM69 510 to 793 VAC 45 to 65 Hz

Dielectric voltage supply to output 4kV

Rated operational power

M23 9 VA@230 V,50 Hz

M48 13 VA @ 400 V, 50 Hz

M69 21 VA @ 600 V, 50 Hz

Supplied by L1 and L2

Power ON delay 1to 30 s ± 0.5 s

Reaction time (input signal variation from

-20% to +20% or from

+20% to -20% of set value)

Alarm ON delay < 250 ms

Alarm OFF delay < 250 ms

Accuracy (15 min warm-up time)

Temperature drift ± 1000 ppm/°C

Delay ON alarm ± 10% on set value ± 50 ms

Repeatability ± 0.5% on full-scale

Indication for

Power supply ON LED, green

Alarm ON LED, red (flashing 2 Hz

during delay time)

Output relay ON LED, yellow

Environment

Degree of protection IP 20

Pollution degree 3 (DWB02), 2 (PWB02)

Operating temperature

@Max. voltage, 50 Hz -20 to +60°C, R.H. < 95%

@Max. voltage, 60 Hz -20 to +50°C, R.H. < 95%

Storage temperature -30 to +80°C, R.H. < 95%

Housing dimensions

DIN-rail version 45 x 80 x 99.5 mm

Plug-in version 36 x 80 x 94 mm

Weight Approx. 250 g

Screw terminals

Tightening torque Max. 0.5 Nm

acc. to IEC 60947

Approvals UL, CSA

CE-Marking Yes

EMC Electromagnetic Compatibility

Immunity According to EN 61000-6-2

Emission According to EN 61000-6-3

Mode of Operation

DWB02 and PWB02 mea-

surethe active power of a 3-

phase balanced system. The

relay has an adjustable pow-

er ON delay in order to avoid

undesired overload detec-

tion during motor start.

Example 1

Latching mode, relay NE

In this application DWB02 or

PWB02 is connected to an

external current metering

transformer,type MI..., (con-

nected between U1 & U2) as

well as to a 3-phase asyn-

chronous motor. The relay is

energized as soon as the

power supply is applied.

After the power ON delay,

the unit starts to measure

power. If it is within the set-

points, the relay is ener-

gized, and the yellow LED is

ON. As soon as the power

drops below the lower set-

point or raises above the

upper setpoint the output

relay releases after the set

time has expired. To restart

the measurement, connect

Z1 and U1 (2 and 9) or inter-

rupt the power supply for at

least 1 s.

Example 2

Non-latching mode, relay

NE.

DWB02 and PWB02 react

as described in the previous

example 1 except that the

relay reactivates automati-

cally as soon as active pow-

er is back within the two

setpoints again. When the

measured power rises

above the adjusted upper

level, the red LED starts

flashing, and the output

relay releases after the set

time period. When the mea-

sured power drops below

the adjusted lower level, the

red LED starts flashing, and

the output relay releases

after the set time period.

Example 3:

DWB02CM2310A and

PWB02CM2310A can be

used for monitoring the

power of a 1-Phase load

with 208 to 240 V AC mains

voltage. In this case the

power supply has to be con-

nected between L1, L2 (or 5,

6); L2 and L3 (or 6 and 7)

have to be interconnected.

Example 4

Start/stop mode, relay NE.

In this application DWB02 or

PWB02 are directly connect-

ed to a 3-phase asyn-

chronous motor.The relay is

energized as soon as the

power supply is applied and

the start/stop contact is

closed. After the power ON

delay,the unit starts to mea-

sure the active power. If it is

within the setpoints the relay

is energized. As soon as the

power drops below the low-

er setpoint or raises above

the upper setpoint the out-

put relay releases and the

red LED turns on after the

set time has expired. When

the start/stop contact is

opened the relay is immedi-

ately de-energized. To

Output Specifications

Output SPDT relay

Rated insulation voltage 250 VAC

Contact ratings (AgSnO2)µ

Resistive loads AC 1 8 A @ 250 VAC

DC 12 5 A @ 24 VDC

Small inductive loads AC 15 2.5 A @ 250 VAC

DC 13 2.5 A @ 24 VDC

Mechanical life ≥30 x 106operations

Electrical life ≥105operations

(at 8 A, 250 V, cos ϕ=1)

Operating frequency ≤7200 operations/h

Dielectric strength

Dielectric voltage ≥2kVAC (rms)

Rated impulse withstand volt. 4 kV (1.2/50 µs)

Specifications are subject to change without notice (09.12.05) 3

DWB02, PWB02

Function/Range/Level/Time Setting

Select the desired function

setting the DIP-switches 1

to 4 as shown on the right.

Adjust the input range set-

ting the DIP-switches 5 and

6. To access the DIP-

switches open the plastic

cover using a screwdriver as

shown below.

If DIP switch 3 is set to ON

(start/stop) the position of

DIP switch 4 does not affect

the products’ working

mode.

Center knobs:

Setting of upper and lower-

level from 10 to 110% of

nominal power.

Lower left knob:

Setting of delay on absolute

scale: 0.1 to 30 s.

Lower right knob:

Setting of power ON delay

on absolute scale: 1 to 30 s.

Measuring range

SW5 ON ON OFF OFF

SW6 ON OFF ON OFF

M23 208 VAC 220 VAC 230 VAC 240 VAC

M48 380 VAC 400 VAC 415 VAC 480 VAC

DWB02 only

M69 600 VAC 690 VAC 600 VAC 690 VAC

Contact input (SW3 OFF)

ON: Latch function enable

OFF: Inhibit function enable

Working mode

ON: Contact input for start/stop functions

OFF: Contact input for latch/inhibit functions

Input current range (terminals I1, I2 or 10, 11)

ON: 10A

OFF: 5A/MI

Relay status

ON: Relay de-energized in normal condition

OFF: Relay energized in normal condition

Contact input working mode

CLOSED OPEN

LATCH NOT ACTIVE ACTIVE

INHIBIT ACTIVE NOT ACTIVE

START/STOP START STOP

Mode of Operation (cont)

restart the system just con-

nect the start/stop contact.

Note 1: to use the start/stop

function the output relay has

to command a contactor in

series to the load (see last

two wiring diagrams).

Note 2 (3-phase voltage):

connect the 3-phase power

supply to the terminals L1,

L2 and L3 (DWB02) - 5, 6

and 7 (PWB02) taking care

of the sequence.

L2 L3L1

16 18

I2I1

Contact input

DWB02

675

1011

Contact input

PWB02

Notes

1.DIP-switch 3 set ON enables the start/stop function

that is managed by the closing-opening of the

contact input.

2.DIP-switch 3 set OFF enables the input contact

for the latch/inhibit functions: the selection between

these is allows by the DIP switch 4.

The following table shown as the input contact man-

ages the mode of operation:

4Specifications are subject to change without notice (09.12.05)

DWB02, PWB02

PWB02CM2310A - Direct connection - 1-Phase LoadDWB02CM2310A - Direct connection - 1-Phase Load

DWB02 - MICT PWB02 - MICT

Latch/Inhibit

Contact

Latch/Inhibit

Contact

Latch/Inhibit

Contact Latch/Inhibit

Contact

DWB02 - Standard CT PWB02 - Standard CT

Latch/Inhibit

Contact

Latch/Inhibit

Contact

Wiring Diagrams

DWB02 - Direct connection PWB02 - Direct connection

Latch/Inhibit

Contact

Latch/Inhibit

Contact

Specifications are subject to change without notice (09.12.05) 5

Operation Diagrams

T T T

Latch function - NE relay

Inhibit function - ND relay

DWB02, PWB02

Power supply

Latch contact

(Closed = latch not active)

Upper level

Hysteresis

Active power Power

Power

Lower level

Relay ON

Power supply

Inhibit contact

(Closed = inhibit active)

Upper level

Hysteresis

Active power

Lower level

Relay ON

L2 L3L1

16 18

I2I1

675

1011

PWB02 - Direct connection - Manual start and stop (NE relay)DWB02 - Direct connection - Manual start and stop (NE relay)

Start/stop

Contact Start/stop

Contact

Wiring Diagrams (cont.)

With the start/stop function enabled, it’s necessary to use the following wiring diagrams (which are two examples among

many others). It is possible for both 3-phases loads and of 1-phase loads, either through direct connection or external cur-

rent metering transformer.

T T

Startand stop function - NE relay

Power

Power supply

Start/Stop contact

(Closed = Start; Open = Stop)

Upper level

Hysteresis

Active power

Lower level

Relay ON

Power ON

6Specifications are subject to change without notice (09.12.05)

DWB02, PWB02

83.5

99.5

28.5

Dimensions

DIN-rail Plug-in