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Menu
57
VMD461_D00314_01_M_XXEN/10.2018
Unbalance (47) (menu 3.6)
The unbalance is calculated between the phase voltages and the line-to-line
voltages. The higher of the two values will be compared to the specified re-
sponse value and can lead to a shutdown of the electrical installation.
Function
(menu 3.6.1)
Enable/Disable monitoring
Resp. value
(menu 3.6.2) Specify a limit value at which tripping is to be
executed (in 0.1 % steps)
Hysteresis
(menu 3.6.3)
Set a hysteresis
t
(off)
(menu 3.6.4)
Response delay: Period of time during which the
unbalance limit value must be violated until the
VMD461 shuts down the electrical installation
Phase sequence (47) (menu 3.7)
AC system
:
When phase sequence monitoring is enabled, the alarm relays K1 and/or K2
trip when the detected
phase sequence
no longer matches the specified val-
ue (measurement time approx. 50 ms).
Function
(menu 3.7.1)
Enable/Disable monitoring phase sequence
Phase sequence
(menu 3.7.2)Select specified phase sequence (right, left)
DC system
:
When phase sequence monitoring is enabled, the polarity of the system is
tested.
The alarm relays K1 and/or K2 trip when the
polarity
no longer matches the
specified value (measurement time approx. 50 ms).
Function
(menu 3.7.1)
Enable/Disable monitoring polarity
Phase sequence
(menu 3.7.2)Select polarity
right: L2/DC+=
+
N/DC–= –
left: L2/DC+=
–
N/DC–= +
Содержание LINETRAXX VMD461
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