Datasheet
If "with memory" mode has been selected, the relay opens and stays in this position when threshold crossing is detected. The power supply must be disconnected to reset the product.
MUSF relays operate in window mode: they check that the controlled voltage stays between a minimum and maximum threshold.
The under and overvoltage threshold values are set by two graduated potentiometers by reading the Un scale to be monitored directly.
The hysteresis is fixed, value: 3 % of the preset thresholds.
If the controlled voltage exceeds the preset upper threshold, or falls below the preset lower threshold for longer than the time set on the front face (0.1 to 10 s), the output relay opens and LED R is
extinguished. During the time delay, this LED flashes.
Once the voltage returns to below the upper threshold value minus the hysteresis, or above the lower threshold value plus the hysteresis, the relay closes instantaneously.
When the unit is powered up with a measured fault, the relay stays open.
2
Hysteresis
3
Overvoltage function relay
4
Undervoltage function relay
5
Controlled signal
6
Delay on threshold crossing (Tt)
: MUS
-
Under/overvoltage
- with latching
N
o
Legend
1
Threshold
2
Hysteresis
3
Overvoltage function relay
4
Undervoltage function relay
5
Controlled signal
6
Delay on threshold crossing (Tt)
: MUSF
- Under and overvoltage controller in window mode
N
o
Legend
1
High threshold
2
Low threshold
3
Hysteresis
4
Controlled signal
5
Delay on threshold crossing (Tt)
6
Relay
: MUS
-
MUSF
N
o
Legend
1
1 A fast-blow fuse or cut-out
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
13/03/2012 www.crouzet.com