Monitoring Relays
True RMS 3-Phase, 3-Phase+N, Multi-function
Type DPB71
• TRMS 3-phase over and under voltage,
phase sequence and phase loss monitoring relay
• Detects when all 3 phases are present and have the
correct phase sequence
• Detects if all the 3-phase-phase or phase-neutral volt-
ages are within the set limits
• Upper and lower limits separately adjustable
• Measures on own power supply
• Selection of measuring range by DIP-switches
• Adjustable voltage on relative scale
• Adjustable delay function (0.1 to 30 s)
• Output: 5 A SPDT relay N.E.
• For mounting on DIN-rail in accordance with
DIN/EN 50 022
• 35.5 mm DIN-rail housing
• LED indication for relay, alarm and power supply ON
Product Description
3-phase or 3-phase+neutral
line voltage monitoring relay
for phase sequence, phase
loss, over and under voltage
(separately adjustable set
points) with built-in time
delay function.
Supply ranges from 208 to
480 VAC covered by two
multivoltage relays.
35.5 mm wide housing suit-
able both for back and front
panel mounting.
Ordering Key
Housing
Function
Type
Item number
Output
Power supply
DPB 71 C M23
Type Selection
Mounting
DIN-rail
Output
SPDT
Supply: 208 to 240 VAC
DPB 71 C M23
Supply: 380 to 480 VAC
DPB 71 C M48
Input Specifications
Input
L1, L2, L3, N
Note: Connect the neutral only
if it is intrinsically at the star
centre
Measuring ranges
208 to 240
∆
VAC
380 to 480
∆
VAC
Ranges
Upper level
Lower level
Terminals L1, L2, L3, N
Measure on own supply
Output Specifications
Output
Rated insulation voltage
Contact ratings
(AgSnO
2
)
Resistive loads
AC 1
DC 12
Small inductive loads AC 15
DC 13
Mechanical life
Electrical life
SPDT relay
250 VAC
µ
5 A @ 250 VAC
5 A @ 24 VDC
2.5 A @ 250 VAC
2.5 A @ 24 VDC
≥
30 x 10
6
operations
≥
10
5
operations
(at 5 A, 250 V, cos
ϕ
= 1)
≤
7200 operations/h
177 to 275
∆
VAC
323 to 550
∆
VAC
+2 to +22%
of the nominal voltage
-22 to -2%
of the nominal voltage
Note:
The input voltage
must not exceed the maximum
rated voltage or drop below
the minumum rated voltage
reported above.
Hysteresis
Set points from 2 to 5%
1%
Set points from 5 to 22%
2%
Operating frequency
Dielectric strength
Dielectric voltage
2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 µs)
Supply Specifications
Power supply
Rated operational voltage
through terminals:
M23 - Delta Voltage:
M48 - Delta Voltage:
M48 - Star Voltage:
Rated operational power
DPB71CM23
DPB71CM48
Overvoltage cat. III
(IEC 60664, IEC 60038)
L1, L2, L3, N
208 to 240 VAC ± 15%
45 to 65 Hz
380 to 480 VAC ± 15%
45 to 65 Hz
220 to 277 VAC ± 15%
45 to 65 Hz
13 VA @ 230
∆VAC,
50 Hz
13 VA @ 400
∆VAC,
50 Hz
Supplied by L1 and L3
Specifications are subject to change without notice (23.10.06)
1
DPB71
General Specifications
Power ON delay
Reaction time
Incorrect phase sequence or
total phase loss
Voltage level
Alarm ON delay
Alarm OFF delay
Accuracy
Temperature drift
Delay ON alarm
Repeatability
Indication for
Power supply ON
Alarm ON
Output relay ON
1 s ± 0.5 s or 6 s ± 0.5 s
Environment
Degree of protection
Pollution degree
Operating temperature
Storage temperature
Housing
Dimensions
Material
Weight
Screw terminals
Tightening torque
Approvals
CE Marking
EMC
Immunity
Emissions
IP 20
3
-20 to 60°C, R.H. < 95%
-30 to 80°C, R.H. < 95%
35.5 x 81 x 67.2 mm
PA66
Approx. 100 g
Max. 0.5 Nm
according to IEC 60947
UL, CSA
Yes
Electromagnetic Compatibility
According to EN 61000-6-2
According to EN 61000-6-3
< 200 ms
(input signal variation from
-20% to +20% or from
+20% to -20% of set value)
< 200 ms (delay < 0.1 s)
< 200 ms (delay < 0.1 s)
(15 min warm-up time)
± 1000 ppm/°C
± 10% on set value ± 50 ms
± 0.5% on full-scale
LED, green
LED, red (flashing 2 Hz
during delay time)
LED, yellow
Mode of Operation
Connected to the 3 phases
(and neutral) DPB71 oper-
ates when all 3 phases are
present at the same time,
the phase sequence is cor-
rect and the phase-phase (or
phase-neutral) voltage levels
are within set limits.
If one or more phase-phase
or phase-neutral voltages
exceeds the upper set level
or drops below the lower set
level, the red LED starts
flashing 2 Hz and the output
relay releases after the set
time period. If the phase
sequence is wrong or one
phase is lost, the output
relay releases immediately.
Only 200 ms delay occurs.
The failure is indicated by
the red LED flashing 5 Hz
during the alarm condition.
Example 1
(mains network monitoring)
The relay monitors over and
under voltage, phase loss
and
correct
phase
sequence.
Example 2
(load monitoring)
The relay releases in case of
interruption of one or more
phases, when one or more
voltages drop below the
lower set level or exceed the
upper set level.
Function/Range/Level and Time Delay Setting
Adjust the input range set-
ting the DIP switches 3 and
4 as shown below.
Select the desired function
setting the DIP switches 1
and 2 as shown below.
To access the DIP swiches
open the grey plastic cover
as shown below.
Selection of level and time
delay:
Upper knob:
Setting of lower level on rel-
ative scale.
Centre knob:
Setting of upper level on rel-
ative scale.
Lower knob:
Setting of delay on alarm
time on absolute scale (0.1
to 30 s).
Power ON delay
ON: 6 s ± 0.5 s
OFF: 1 s ± 0.5 s
Monitored voltage
ON: Phase-Neutral
OFF: Phase-Phase
Measuring range
SW3
ON
ON
OFF
SW4
ON
OFF
ON
M23 Ph-Ph 208 VAC 220 VAC 230 VAC
Voltage
M48 Ph-Ph 380 VAC 400 VAC 415 VAC
Voltage
M48 Ph-N 220 VAC 230 VAC 240 VAC
Voltage
OFF
OFF
240 VAC
480 VAC
277 VAC
2
Specifications are subject to change without notice (23.10.06)
DSP and ARM Processors
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