Specifications are subject to change without notice (09.06.2021)
1
DWB03, PWB03
Monitoring Relays
3-Phase Active power direction
Types DWB03, PWB03
• TRMS active power relays for three phase
balanced applications
• Measuring if active power is within set limits
• Measure their 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/
EC 60715 (DWB03) or plug-in module (PWB03)
• 45 mm Euronorm housing (DWB03) or 36 mm plug-in
module (PWB03)
• LED indication for relay, alarm and power supply ON
Product Description
DWB03 and PWB03 are
precise TRMS active
power monitoring relays for
3-phase balanced systems.
They can be used for mon-
itoring the actual load of
asynchronous motors and
other symmetrical loads, as
well as to see if the power
flows in the correct direc-
tion.
Start/stop input allows to
use a manual switch to start
and stop the system, with-
out 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 condition.
The LED’s indicate the state
of the alarm and the output
relay.
Input Specifications
Input
Voltage (own power supply):
3 - phase
DWB03:
L1, L2, L3
PWB03:
5, 6, 7
M23: 208 to 240 VAC ± 15%
DWB03CM48: 380 to 480 VAC ± 15%
PWB03CM48: 380 to 415 VAC ± 15%
DWB03CM69:
600 to 690 VAC ± 15%
1- phase
DWB03CM23:
L1, L2
PWB03CM23:
5, 6
208 to 240 VAC ± 15%
Current:
DWB03:
5A, 10A: I1, I2
MI...:U1, U2
PWB03:
5A, 10A: 11, 10
MI...: 9, 8
Measuring ranges
Upper level Lower level
Active power
-100 to 100 % -100 to 100 %
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
CTD1 150 A/5 A
15 to 150 A
180 A
CTD4 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 (PWB03
only)
Contact input
DWB03
Terminals Z1, U2
PWB03
Terminals 2, 9
Disabled
> 10 k
W
Enabled
< 500
W
Pulse width
> 500 ms
Hysteresis
~ 2% of set value - fixed
DWB03
PWB03
Ordering key
Housing
Function
Type
Item number
Output
Power Supply
Range
DWB 03 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 03 C M23 10A
DWB 03 C M48 10A
DWB03 C M69 10A
Plug-in SPDT
PWB 03 C M23 10A
PWB 03 C M48 10A
