Specifications are subject to change without notice (17.07.06)
1
Monitoring Relays
Product Description
3-phase monitoring relay for phase
sequence and phase loss
Detects when all phases are present and have the
correct sequence
Measures own power supply
Power supply range: 208 to 480 VAC (15%)
Output: 5 A SPDT relay (DPA51) or 5 A DPDT relay (DPA71)
normally energized
For mounting on DIN-rail in accordance with
DIN/EN 50 022
17.5 mm (DPA51) or 35.5 mm (DPA71) DIN-rail housing
(DIN 43880)
LED indication for relay and power supply ON
Type Selection
Mounting
Output
Supply: 208 to 480 VAC
Supply: 208 to 240 VAC
Supply: 380 to 480 VAC
DIN-rail
SPDT
DPA 51 C M44
DIN-rail
DPDT
DPA 71 D M23
DPA 71 D M48
Input
L1, L2, L3
Terminals L1, L2, L3
Measures on own supply
Measuring range
208 to 480 VAC (DPA51CM44) 177 to 550 VAC
208 to 240 VAC (DPA71DM23) 177 to 275 VAC
380 to 480 VAC (DPA71DM48) 323 to 550 VAC
ON-level
> 85% of the phase- phase
voltage
3-Phase Sequence and Phase Loss
Types DPA51, DPA71
Input Specifications
Output
SPDT or DPDT relay, N.E.
Rated insulation voltage
250 VAC
Contact ratings (AgSnO
2
)
DPA51 (SPDT):
Resistive loads
AC 1
5 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
DPA71 (DPDT)
Resistive loads
AC 1
5 A @ 250 VAC
Small inductive loads AC 15
3 A @ 250 VAC
DC 13
3 A @ 24 VDC
Mechanical life
30 x 10
6
operations
Electrical life
10
5
operations
(at 5 A, 250 V, cos
= 1)
Operating frequency
7200 operations/h
Dielectric strength
Dielectric voltage
2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 s)
Output Specifications
3-Phase relay for detection of
incorrect phase sequence,
total and partial phase loss.
Supply range from 208 to 480
VAC covered by three multi-
voltage relay. For mounting
on DIN-rail. Housing 17.5 mm
wide for SPDT version and
35.5 mm for DPDT version,
suitable both for back and
front panel mounting. The
device detects regenerated
voltage up to 85% of the
nominal voltage (phase-
phase).
DPA51
DPA71
Ordering Key
Housing
Function
Type
Item number
Output
Power supply
DPA 51 C M44
2
Specifications are subject to change without notice (17.07.06)
DPA51, DPA71
Mode of Operation
DPA51 and DPA71 monitor
their own 3-phase power
supply voltage.
The relays operate when all
the phases are present and the
phase sequence is correct.
The relays release when one
phase-phase voltage drops
below 85% of the other
phase-phase voltages or
when the phase sequence is
wrong.
Example 1
The relay monitors that the
power supply has the correct
phase sequence and that all
phases are present.
Example 2
The relay releases in case of
interruption of one or more
phases, provided that the
regenerated voltage does
not exceed 85% of the
phase-phase voltage.
Operation Diagram
Reaction time
Alarm ON delay
< 100 ms
Alarm OFF delay
< 300 ms
Accuracy
(15 min warm-up time)
Temperature drift
1000 ppm/C
Repeatability
0.5% on full scale
Indication for
Power supply ON
LED, green
Relay ON
LED, yellow
Environment
Degree of protection
IP 20
Pollution degree
3
Operating temperature
(DPA51)@ Max. voltage, 50 Hz -20 to +60C, R.H. < 95%
(DPA51)@ Max. voltage, 60 Hz -20 to +50C, R.H. < 95%
(DPA71)
-20 to +50C, R.H. < 95%
Storage temperature
-30 to +80C, R.H. < 95%
Housing
Dimensions
DPA51
17.5 x 81 x 67.2 mm
DPA71
35.5 x 81 x 67.2 mm
Material
PA66
Weight
Approx. 75 g
Screw terminals
Tightening torque
Max. 0.5 Nm
acc. to IEC 60947
Approvals
UL, CSA (DPA71 UL only)
CE Marking
Yes
EMC
Electromagnetic Compatibility
Immunity
According to EN 61000-6-2
Emission
According to EN 61000-6-3
General Specifications
Power supply
Overvoltage cat. II
Rated operational voltage
(IEC 60664, IEC 60038)
through terminals: L1, L2, L3
DPA51CM44
208 to 480 VAC 15%,
45 to 65 Hz
DPA71DM23
208 to 240 VAC 15%,
45 to 65 Hz
DPA71DM48
380 to 480 VAC 15%,
45 to 65 Hz
Rated operational power
DPA51
13 VA @ 400 VAC, 50 Hz
Supplied by L2 and L3
DPA71
10 VA @ 400 VAC, 50 Hz
6 VA @ 230 VAC, 50 Hz
Supplied by L2 and L3
Supply Specifications
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