Datasheet

ESG 7.16
Function description
For all the functions the LEDs MIN and MAX are flashing alternating
(the relay is fallen off), when the minimum value for the measured
voltage was chosen to be greater than the maximum value.
If a failure already exists when the device is activated, the output
relay remain in off-position and the LED for the corresponding
threshold is illuminated.
The device includes seperately every phase voltage (L-N) and
monitors it according to the selected function (UNDER or WINDOW).
Undervoltage monitoring (UNDER, UNDER+SEQ)
When the measured voltage (one of the phase voltages) falls below
the value adjusted at the MIN-regulator, the set interval of the
tripping delay (DELAY) begins (red LED MIN flashes). After the
interval has expired (red LED MIN illuminated), the output relay R
switches into off-position (yellow LED not illuminated). The output
relay R switches into on-position (yellow LED illuminated), when the
measured voltage (all phase voltages) exceeds the value adjusted at
the MAX-regulator.
Window function (WIN, WIN+SEQ)
The output relay R switches into on-position (yellow LED illumina-
ted) when the measured voltage (all phase voltages) exceeds the
value adjusted at the MIN-regulator. When the measured voltage
(one of the phase voltages) exceeds the value adjusted at the MAX-
regulator, the set interval of the tripping delay (DELAY) begins (red
LED MAX flashes). After the interval has expired (red LED MAX
illuminated) the output relay R switches into off-position (yellow
LED not illuminated). The output relay R switches into on-position
again (yellow LED illuminated) when the measured voltage falls
below the value adjusted at the MAX-regulator (red LED MAX not
illuminated). When the measured voltage (one of the phase voltage)
falls below the value adjusted at the MIN-regulator, the set interval
of the tripping delay (DELAY) begins again (red LED MIN flashes).
After the interval has expired (red LED MIN illuminated), the output
relay R switches into off-position (yellow LED not illuminated).
Phase sequence monitoring (SEQ)
Phase sequence monitoring is selectable for all functions.
In single phase circuit, the phase sequence monitoring must be
disconnected.
If a change in phase sequence is detected (red LED SEQ illumina-
ted), the output relay R switches into off-position after the set
interval of tripping delay (DELAY) has expired (yellow LED not
illuminated).
Neutral wire break
The device monitors every phase (L1, L2 and L3) against the neutral
wire N.
A shift of neutral point occurs by an asymmetrical phase load if the
neutral wire breaks in the power line.
If one of the phase voltages exceeds the value adjusted at the trip
point, the set interval of tripping delay (DELAY) begins (red LED MIN
or MAX flashes). After the interval has expired (red LED MIN or MAX
illuminated), the output relay switches into off-position (yelow LED
not illuminated).
1-phase or 3-phase voltage monitoring relay
(Multifunction)
EMR IU11D
U
LED MAX
LED MIN
Max
Min
Delay >Delay Delay
U
LED MAX
LED MIN
Max
Min
Delay >Delay Delay
LED U
L1
L2 L3
Delay
L1 L3 L2
LED Seq
L3 L2
L1
N
Shift of neutral point caused
by asymmetrical phase load
and missing neutral wire