Datasheet

2
Specifications are subject to change without notice (03.09.14)
Selection of monitored
voltage:
Connecting the terminals
Z1 and Z2:
No connection: phase-phase.
Connected: phase-neutral.
Selection of range, level
and time delay:
Upper knob ( ):
Setting of lower level on
relative scale.
Centre top knob ( ):
Setting of upper level on
relative scale.
Centre bottom knob
(DELAY):
Setting of delay on alarm
time on absolute scale (0.1
to 30 s).
Lower knob (see on the
right):
Setting of nominal delta
voltage.
Function/Range/Level and Time Delay Setting
DPB51
Mode of Operation
Connected to the 3 phases
(and neutral) DPB51 oper-
ates when all 3 phases are
present at the same time, the
phase sequence is correct
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 low-
er set level or exceed the
upper set level.
Power supply Overvoltage cat. III
Rated operational voltage (IEC 60664, IEC 60038)
through terminals: L1, L2, L3, N
Delta Voltage: 208 to 480 VAC ± 15%
45 to 65 Hz
Star Voltage: 120 to 277 VAC ± 15%
45 to 65 Hz
Rated operational power
13 VA @ 400 ∆VAC, 50 Hz
Supplied by L1 and L2
Supply Specifications
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
Operating temperature -20 to 60°C, R.H. < 95%
Storage temperature -30 to 80°C, R.H. < 95%
Housing
Dimensions 17.5 x 90 x 67.2 mm
Material PA66 or Noryl
Weight Approx. 100 g
Screw terminals
Tightening torque
L1, L2, L3, N Min. 0.5 Nm, Max. 1.1 Nm
15, 16, 18, Z1, Z2 Min. 0.4 Nm, Max. 0.8 Nm
Product standard EN 60255-1: 2010
Approvals UL
CE Marking L.V. Directive 2006/95/EC
EMC Directive 2004/108/EC
Immunity According to EN 60255-26
According to EN 61000-6-2
Emissions According to EN 60255-26
According to EN 61000-6-3
General Specifications (cont.)
Power ON delay 1 s ± 0.5 s
Reaction time
Incorrect phase sequence or
total phase loss < 200 ms
(input signal variation from
-20% to +20% or from
+20% to -20% of set value)
Alarm ON delay < 200 ms (delay < 0.1 s)
Alarm OFF delay < 200 ms (delay < 0.1 s)
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
General Specifications
Nominal Ph-Ph voltage
(delta connections)
Nominal Ph-N voltage
(star connections)
480 VAC 277 VAC
415 VAC 240 VAC
400 VAC 230 VAC
380 VAC 220 VAC
240 VAC 139 VAC
220 VAC 127 VAC
208 VAC 120 VAC