+10%
Umax
PH1
PH2
PH3
380V PH/PH
380V PH/PH
380V PH/PH
380V PH/PH
380V PH/PH
380V PH/PH
220V PH/PH
? PH/N
5kVA
1kVA
5kVA
1kVA
63V
316V
N
380V
220V
220V
Cas de perte de NEUTRE, réseau non équilibré
PH1
PH2
PH3
380V PH/PH
380V PH/PH
380V PH/PH
380V PH/PH
380V PH/PH
?V PH/PH
1kVA
380V
5kVA
380V
1kVA
63V
5kVA
316V
Cas de la perte d’une PHASE
1kVA
1
2
3
1
2
3
PH1
PH2
PH3
LEDs 1/2/3
LED 4
ETAT
RELAIS
PH1
PH2
PH3
%U
LED Indicator
Display
ADDITIONAL CHECK WHEN ROTATION IS CORRECT :
with correct
rotation
with reverse rotation display
will be in running ligh eff ect
on PH1, PH2, PH3. The relay
is instantly deactivated.
In the following cases, phase 2 is taken as an example,
but this remains valid for phase 1 and 3.
Display on the PH001 DIN box inside the cabinet
Anticlockwise
Clockwise
Phase rotation :
As soon as the power is turned on and during the entire operating period, the system checks the
presence and direction of phase rotation.
- If the detected direction is anti-clockwise (known as reverse rotation): the relay will be immediately
deactivated in order to prevent incorrect rotation of the motors. The display of LEDs 1/2/3 will be in
running light eff ect, LED 4 will be red steady. The relay will only be activated after checking the correct
rotation and after carrying out the other checks.
- If the detected direction is clockwise : the rest of the complete control cycle will be carried out.
The output relay will only be activated when the entire control cycle remains correct.
Undervoltage detection (300V to 380V) :
As soon as the phase rotation is correct, the voltage on each phase is
compared with the setpoint displayed on the Umin front potentiometer.
If a phase has a voltage lower than this setpoint:
- The corresponding LED will be displayed by blinking slowly.
- LED 4 will be displayed in RED, blinking slowly.
If the fault is still present and after the end of the time delay, the output relay
will be deactivated and LED 4 will turn RED steady.
Overvoltage detection (380V to 480V) :
The voltage on each phase is compared with the setpoint displayed on the
Umax front potentiometer.
If a phase has a voltage higher than this setpoint :
- The corresponding LED will be display by rapid blinking.
- LED 4 will be displayed in RED, blinking slowly.
If the fault is still present and after the end of the time delay, the output
relay will be deactivated and LED 4 will turn red steady.
Loss of neutral / phase asymmetry (5% to 25%) :
Risks such as undervoltage and overvoltage can cause destruction of the equipment.
The PH001 makes it possible to constantly check that the voltages remain within
acceptable limits. But while remaining within the minimum / maximum limits, the
voltage of one phase can become too high and another too low. This can be caused by:
- loss of neutral in «Three-phase + neutral» mode :
Neutral allows the same
Phase / neutral voltage to be maintained whatever the consumption, even unbalanced.
In the event of neutral cut-off and if the installation remains balanced, the phase / neutral
voltage remains stable. But in the event of loss of neutral and unbalanced installation,
the neutral seen by the user is re-supplied through the other consumers present. In
this case, the voltage of one phase relative to the neutral decreases while the voltage
of another phase increases relative to neutral. This situation can be detrimental or even
destructive for single-phase consumers. The loss of the neutral is only prejudicial from
the moment when the single-phase voltage becomes abnormal (outside the defi ned
thresholds).
- Phase loss :
the loss of a phase is diffi cult to detect because the other consumers
present return a voltage by induction or by voltage return on the missing phase.
As a result, the voltage of the missing phase is not zero.
Instant trigger :
The output relay is deactivated instantly in the event of :
- loss of phase rotation.
- exceeding the overvoltage setting by more than 10%.
- exceeding the maximum of the asymmetry / loss of neutral,
i.e. +25%.
- voltage higher than 277v PH/N or 480v PH/PH.
Time delay (0,5s to 60s) :
The output delay is deactivated after a delay in the event of :
- exceeding the overvoltage / under voltage setting
between 0 and 10%.
- exceeding the asymmetry setting or loss of neutral less than
25%.
LED4
Status
RELAY
Setting
Umin
LED PH2 /L2
RELAY
Setting
Umax
LED PH2/L2
Relay
Loss of neutral, unbalanced power grid
Loss of phase
LED 4
Status
Delay
Delay
Delay
Delay
Delay
LED 4
Status
LEDs 1/2/3
PH1
PH2
PH3
L1
L1
L2
L2
L3
L3
Status
Status
PH1
PH2
PH3
Status
PH1
PH2
PH3
Status
PH1
PH2
PH3
Status
PH1
PH2
PH3
Status
PH1
PH2
PH3
Status
L1
L2
L3 Status
L1
L2
L3 Status
L1
L2
L3 Status
Delay
Delay
Setting
%U
Relay
LED 4
Status
PH1
PH2
PH3
If the voltage exceeds 10% of the Umax setting value, the relay will be deactivated immediately.
If the voltage of a phase is between the «undervoltage» setpoint and the «overvoltage» setpoint, the corresponding LED will be
displayed steady. (LED 1 and LED 3 in the example). As a result, it is possible to see a display with the 3 states on the LEDs 1,2,3,
namely: one LED steady, one LED blinking slowly and one LED blinking fast.
In any case, the damage is caused by the voltage diff erence between each of the phases.
- The PH001 controls the voltage diff erence between each of the phases compared to an internal dummy neutral.
This voltage diff erence must remain below the setpoint displayed on the «Asymmetry» front potentiometer.
When all the phase voltages are correct, (i.e. between the under and overvoltage
thresholds), the PH001 compares the voltage of each phase with respect to the
others in %. If the voltage of one phase compared to another, goes outside the
limits defi ned in «asymmetry» : LED 4 will be displayed in yellow, blinking slowly.
If the fault is still present and after the end of the time delay, the output relay
will be deactivated and LED 4 will turn yellow steady.
Note that a general voltage drop over the three phases (following a three-phase
start-up by a large consumer) will have no impact as long as this drop remains
within the limits of the undervoltage setting.
In addition, if the voltage of one of the phases goes beyond the under or overvoltage limits,
the corresponding LED (L1, L2 or L3) will be displayed blinking slowly or fast.