Novar 1xxx KMB systems
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4.7 Manual Intervention in Control Process
In order to be able to check the controller’s response to a control deviation change, it is possible to
connect or disconnect a section by operator’s manual intervention, not only in the Manual mode but
also within the automatic control process.
While holding button M pressed down you can connect or disconnect a section using buttons ▲and
▼ and watch the controller’s response to the change of condition. Each button press connects or
disconnects one compensation section, always the one with the smallest value (exception: in the
linear switching mode the order of connecting/disconnecting is specified in description of parameter
21). Reconnection delay time is respected when connecting.
If the controller is left in the automatic control mode, it will carry out evaluation and control intervention
after the control time has elapsed thus putting the unbalanced conditions in the power system back to
a compensated state.
4.8 Controller Initialization
In some situations it may be necessary to put the controller back to its default settings with which it is
shipped. You can do this using controller initialization. After initialization has been run, the initial test
starts too, that means the controller carries out all the operations as if the power supply voltage is
introduced.
The controller’s parameters are set to the values shown as default in Table 4.1 on initialization, except
the following parameters:
• metering current transformer nominal secondary value (13)
• type of measurement voltage (phase or line, 15)
• instrument address, communication rate and protocol in instruments with communication
interface (50, 51, 52)
These parameters remain unchanged, at the values specified before initialization.
The counters of connection time and switching operations (parameters 43, 44) are not affected by
initialization either.
You can start the controller initialization by pressing buttons M, P, and ▼ ( or buttons ▲, ▼and ►
at Novar 10xx models ) simultaneously and holding them down for about 6 seconds. The controller will
first disconnect all sections connected and run the initial test – this is when you can release the
buttons. Then it will carry out the initialization routine proper and since parameter 16 value is not
defined, it will start the automatic connection configuration detection process.
Warning! The Manual mode is terminated on initialization if active! The controller is always set to the
automatic control mode after initialization!
4.9 Capacitor Harmonic Load factor (CHL)
One of the measurement quantities is Capacitor Harmonic Load, CHL, factor. This quantity expresses
the total load of capacitors by current and with alarm actuation enabled, it can be used in protection of
the capacitors against overload. This factor’s definition follows.
Compensation capacitors’ service life depends on not exceeding operation limits. One of the limits is
capacitors’s maximum current. This may be exceeded with voltage harmonic distortion due to
a capacitor’s inductance being a function of the frequency.
If voltage in not distorted (sinus), the capacitor current is
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