Novar 1xxx KMB systems
30
31
÷
37
alarm thresholds: undervoltage,
overvoltage, THDI, THDU, CHL,
number of connections and
temperature
— — —
Ranges and units as in Table 4.7
not displayed if the alarm not set up
40 alarm instantaneous condition
Indicates current state of alarm.
43 section connection time (in
thousands of hours)
display range 0.001 to 130
44 number of section connections
(in thousands)
display range 0.001 to 9999
45 instrument failure condition
46 instantaneous condition of
control time
time until next control intervention in
seconds
50 instrument address 1 ÷ 255 1 1
irrelevant for Ethernet interface
instruments
51 communication rate 4800 – 9600 –
19200 Bd
— 9600
52 communication protocol KMB(P0) /
Modbus-RTU(P1)
— KMB(P0)
55 power system frequency A (auto) – 50 Hz –
60 Hz
— A (auto)
56 average value evaluation moving
window size
1 minute ÷ 7 days — 7 days
applies to average values of Acos, APac,
APre
57 minimum and maximum value
evaluation moving window size
1 minutes ÷ 7
days
— 15 minutes
applies to these minimum and maximum
values: mincos, maxPac, maxPre,
maxdPre
58 Celsius/Fahrenheit temperature
display mode
°C – °F — °C
59 cooling enable threshold +10 ÷ +60 °C 1 °C +40 °C
not displayed if cooling output not
specified
60 heating enable threshold -30 ÷ +10 °C 1 °C -5 °C
not displayed if heating output not
specified
63 offset control 0 (no) - 1 (yes) - 0
The control bandwidth can be increased to 0.040 or decreased to 0.000. Control bandwidth increase
may especially be useful in systems with large control range – avoiding uselessly precise control on
high loads reduces the number of control interventions which results in longer contactor service life. If
the parameter values is decreased to 0, the control bandwidth corresponds to value C/k
min
(constant,
not widening).
Note: On low loads, the control bandwidth is “bent” (zone A) to prevent undesired overcompensation
(the illustration is a simplification).
If the target power factor (parameter 01/07) is specified in degrees as phase shift angle, the bandwidth
on high loads is also displayed in degrees.
4.1.6 Parameter 05/11 – Offset Power
These parameters are meaningful when offset control is activated only (see parameter 63). Unless
this control mode is active, they do not appear.
The parameters specify nominal value of the offset (three-phase) reactive power for metering rate 1
(parameter 05), respectively for metering rate 2 (parameter 11). Like the section powers in parameter
25, their values in kvars correspond to nominal three-phase power (i.e. at voltage corresponding to the
preset compensation system nominal voltage U
NOM
in parameter 18 ). The actual value of the offset
power is, as well as for capacitor and choke powers, dependent on the actual network voltage.
The value is entered in the same manner as compensation section powers – capacitive offset power
as positive and inductive offset power as negative.
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