Datasheet

- Overspeed without latching
- Overspeed with latching
If, on energisation, the switch is placed in one of the three intermediate positions (between "underspeed with latching" and "overspeed with latching"), the relay stays in the rest state ("alarm") and
the error is signalled by all three LEDs flashing simultaneously.
The mode selector switch position is taken into account on energisation.
Modifications made during operation will have no effect: the active configuration may therefore be different from that indicated by the switch, the relay operates normally but the change in
configuration is signalled by all three LEDs flashing simultaneously.
In "memory" mode, when a fault has been recorded, the HSV relay latches in the rest position ("alarm" operational state). Once the speed is correct again, the relay can be unlatched (reset) by
closing contact S2 (for 50 ms minimum).
Irrespective of the speed of the controlled process, when S2 is closed the HSV relay is inhibited, the output is at the operating point ("normal" operational state) ; if the speed is still not correct
when contact S2 is reopened, the relay latches again in the rest position ("alarm" operational state).
The HSV can also be reset, by switching off and on again several times in succession (the power break must last at least 1500 ms).
If the process speed is incorrect, this method is limited by the same restriction as resetting using S2.
After the end of the inhibit delay on starting, "Ti", as soon as the measured speed drops below the threshold value, the output relay changes state, from operating point to rest position ("alarm"
operational state, 11-14 open and 11-12 closed).
It returns to the initial state when the speed rises above the threshold plus the hysteresis (fixed at 5% of the displayed threshold).
After the power supply returns, following a break that has lasted at least 1500 ms, the relay is in the ("normal") operating state during the time delay and stays there until the speed is above the
threshold.
When the HSV has been configured in "memory" mode, if underspeed is detected, the output relay stays in the rest state ("alarm") irrespective of any subsequent change in the speed of the
process.
It will not be able to revert to ("normal") operating state until contact S2 closes (50 ms minimum).
If, when S2 reopens, the speed is inadequate, the relay reverts to the rest latched state ("alarm").
The HSV can also be reset by a power break (1500 ms minimum) ; the relay then returns to the ("normal") operating state for at least the duration of the time delay, irrespective of the speed of the
process.
: HSV - Control of underspeed without latching
N
o
Legend
1
Voltage (S1)
2
Threshold
3
Inhibit LED
4
Relay
5
Inhibit delay on starting (Ti)
6
1500 ms min.
7
Speed
: HSV - Control of underspeed with latching
N
o
Legend
1
Voltage (S1)
2
Contact S2
3
Threshold
4
Inhibit LED
5
Relay
6
Inhibit delay on starting (Ti)
7
50 ms min.
8
1500 ms min.
9
Speed
: HSV - Control of overspeed without latching
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
13/03/2012 www.crouzet.com