Lower Voltage; Overvoltage; Underscoring Of The Measurement Current (3); Exceeding Of Measuring Current - janitza Prophi Operating Instructions Manual

Reactive Power Controller

Lower voltage (1)

A lower voltage is recognized, when the measurement
and supply voltage is smaller or equal to the rated volt-
age given on type plate.
If lower voltage occurs, it is recognized after 100ms
latest, and the alarm output is active for at least 1 minute.
The threshold for lower voltage is programmable in 1%
steps in the range of 85% and 99%.
Example
Selected threshold : 85%
85% of the rated voltage of 400V make 340V.
If the voltage of 340V is underscored, the alarm relay
releases.
Attention!
If the measurement and operating voltage falls below
85% of the rated voltage, all capacitor stages are
switched off after about 20ms.

Overvoltage (2)

Overvoltage is recognized, when the measurement and
supply voltage is higher or equal to the rated voltage
given on type plate.
If overvoltage occurs, this will be recognized after
100ms latest. The alarm output will drop out for at least
1 minute and connected capacitor stages will be
disconnected in steps of 10 seconds.
The threshold for overvoltage can be programmed in
the range of 96% up to 110% of the rated voltage in
1% steps.
Example
Selected threshold : 110%
110% of the rated voltage of 400V make 440V.
If the voltage of 440V is exceeded, the alarm relay
releases.

Underscoring of the measurement current (3)

The rated current of a measuring input is 5A. If the
selected threshold for the measurement current is un-
derscored, after 100ms maximum the alarm relay re-
leases for at least 1 minute.
The threshold for underscoring the measuring current
can be programmed in the range of 0% up to 28% of
the rated current in 2% steps.
Example
Selected threshold : 10%
10% of the rated current of 5A make 0.5A.
If the current of 0.5A is underscored and the alarm
relay releases.
= Key 1 = Key 2 = Key 3

Exceeding of measuring current (4)

The current of current measurement input is 5A. The
rated current of the current measuring input is 5A. If
the preset threshold for the measurement current is ex-
ceeded, the alarm relay releases after 100ms latest for
at least 1 minute.
The threshold for exceeding the measurement current
can be set in the range of 50% up to 120% of the rated
current in 5% steps.
Example 1
Selected threshold : 95%
95% of the rated current 5A make 4.75A.
If the current of 4.75A is exceeded, the alarm relay
releases.

Insufficient capacitor output (5)

If the required compensation power is not reached for
one hour, the alarm relay releases for at least one minute.
Supply of real power (6)
If more real power is supplied than consumed (power
station service), the alarm relay releases after 100ms
latest for at least 1 minute.

Harmonic thresholds (7)

If a value in the selected harmonic threshold table is
exceeded, the alarm relay releases after 100ms latest
for at least 1 minute.

Overtemperature (8)

The reactive power controller is laid out for the operat-
ing temperature range between -10°C and +55°C. The
inner temperature of the reactive power controller is
about 2°C higher than the temperature within the cabi-
net.
If the programmable threshold for the controller inner
temperature is exceeded, the alarm relay releases after
100ms latest for at least 1 minute.
Setting range for the temperature : 0..99°C
Attention!
m
For inner temperatures of more than 70°C the
alarm will always be raised.
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