Specifications are subject to change without notice (23.10.06)
1
Monitoring Relays
Product Description
Ordering Key
Housing
Function
Type
Item number
Output
Power supply
• 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
Type Selection
Mounting
Output
Supply: 208 to 240 VAC
Supply: 380 to 480 VAC
DIN-rail
SPDT
DPB 71 C M23
DPB 71 C M48
Input
L1, L2, L3, N
Terminals L1, L2, L3, N
Measure on own supply
Note: Connect the neutral only
if it is intrinsically at the star
centre
Measuring ranges
208 to 240
∆ VAC
177 to 275
∆ VAC
380 to 480
∆ VAC
323 to 550
∆ VAC
Ranges
Upper level
+2 to +22%
of the nominal voltage
Lower level
-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%
True RMS 3-Phase, 3-Phase+N, Multi-function
Type DPB71
Input Specifications
Output
SPDT relay
Rated insulation voltage
250 VAC
Contact ratings (AgSnO2)
µ
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
Mechanical life
≥ 30 x 106 operations
Electrical life
≥ 105 operations
(at 5 A, 250 V, cos
ϕ = 1)
Operating frequency
≤ 7200 operations/h
Dielectric strength
Dielectric voltage
2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 µs)
Output Specifications
DPB 71 C M23
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.
Power supply
Overvoltage cat. III
Rated operational voltage
(IEC 60664, IEC 60038)
through terminals:
L1, L2, L3, N
M23 - Delta Voltage:
208 to 240 VAC ± 15%
45 to 65 Hz
M48 - Delta Voltage:
380 to 480 VAC ± 15%
45 to 65 Hz
M48 - Star Voltage:
220 to 277 VAC ± 15%
45 to 65 Hz
Rated operational power
DPB71CM23
13 VA @ 230
∆VAC, 50 Hz
DPB71CM48
13 VA @ 400
∆VAC, 50 Hz
Supplied by L1 and L3
Supply Specifications
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