Datasheet

ESG 6.17
Connection
Supply voltage 24 ... 240 Vac/dc
Dimensions
A1 N15
L1 L2 L3
25 26 28
16 18 A2
16 18
15
26 28
25
L1
L2
L3
N
U
F1-3
max. 20 A
If the neutral wire is connected to the device, the asymmetry of the
phase voltages referred to the neutral wire (Y-voltage) is monitored
also. In that case both values of the asymmetry are evaluated and if
one of the values exceeds the value set at the ASYM-regulator, the
set interval of the tripping delay (DELAY) begins (red LED ASYM
flashes). After the interval has expired (red LED ASYM illuminated),
the output relays switch into off-position (yellow LED not illumina-
ted).
Loss of neutral wire by means of evaluation of asymmetry
A break of the neutral wire between power line and machinery is
detected as soon as asymmetry between phase-to-phase voltage
and neutral wire occurs. If the asymmetry exceeds the value set at
the ASYM-regulator, the set interval of the tripping delay (DELAY)
begins (red LED ASYM flashes). After the interval has expired (red
LED ASYM illuminated), the output relays switch into off-position
(yellow LED not illuminated). A break of the neutral wire between
our device and the machinery can not be detected.
103 mm
5 mm
22.5 mm
90 mm
L3 L2
L1
N
Shift of the star-point (asymmetry)
through unequal phase-load with
missing neutral wire
3-phase voltage monitoring relay (Multifunction)
EMR DU21C1, EMR DU21D1, EMR DU21B1