Novar 1xxx KMB systems
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5. Novar1312, Novar1312-3 Description
5.1 Basic Operation
Novar1312 Power Factor Controller is a fully automatic instrument to allow optimized control of rapid
reactive power compensation at up to 25 control interventions per second. It features transistor
outputs to drive thyristor switches and relay outputs to connect conventional contactors to or to switch
cooling and heating, respectively.
Novar1312 design concepts are shared with those of Novar1214 and most of the features and
operations are identical. Novar1312 differs from Novar1214 mainly in the following:
• outputs 1 through 12 are fitted with transistor
• control rate of the above mentioned outputs can be set to up to 25 interventions per second
The following section of the manual therefore only deals with features and operations different from
Novar1214. The other features are the same as those of Novar1214.
5.2 Novar1312-3
This model was created by extending of the Novar1312 model by two current inputs that allow (like
three-phase Novar1414 controller) three-phase power factor compensation.
Unlike the Novar 1414 model, the Novar1312-3 is not a classic three-phase controller - to achieve the
highest possible regulation speed, the controller evaluates vector sum of current signals of all three
phases by hardware. This solution has the following consequences:
• instrument evaluates only three-phase active and reactive power and three-phase power
factor (single-phase values are not available); values of current harmonics and THDI are
evaluated as average of all three phases
• when connecting current signals, it is necessary to observe both polarity (k, l) and phase
rotating sequence
• instrument can be used in 50 Hz nominal frequency networks only ( 60 Hz version is
available on request )
5.3 History of Firmware Versions
version date of release note
0.1 3/2007 - basic version
1.0 10/2008 - maximum control rate increased
1.1 4/2014 - THD & CHL alarm behaviour correction at voltage fail
1.2 6/2014 - MaxTHD & MaxCHL values correction
5.4 Installation
5.4.1 Measurement Currents
5.4.1.1 Novar1312
In the same way as the Novar1214 model, connect metering current transformer (CT) outputs to
terminals 1 (k) and 2 (l).
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