Data Sheet

4
IX-2012, www.findernet.com
70 Series - Line monitoring relay
Functions
Functions
= Output contact (11-14)
OV = Overvoltage
OVm = Overvoltage with memory
UV = Undervoltage
UVm = Undervoltage with memory
W = Window mode (OV + UV)
Wm = Window mode (OV + UV)
with memory
H = Hysteresis
If the voltage moves out of limits, following
delay T the output relay turns Off.
When the voltage is again within limits
(± the Switch-on hysteresis H):
- if set in the “without memory” position, the
output relay “recovers”, i.e. it turns On
(after the Switch-on lock-out time) without
any memory of the previous event.
- if set in the “with memory” position
(70.11 and 70.31 only), the output relay
remains open. To reset, it is necessary to
switch the supply Off and then On again,
or to rotate the selector first to an adjacent
position and then to the original position.
Type
70.11
70.31
Overvoltage (OV and OVm functions)
Undervoltage (UV and UVm functions)
Window mode (overvoltage + undervoltage, W and Wm functions)
Type
70.11
70.31
Type
70.11
70.31
70.41
(70.41
without
memory)
Output relay On (NO closed) when all OK: positive logic.
Without Memory
With memory
Without Memory
With memory
Without Memory
With memory