Technical data

• Constant reactive power Q
• Constant power factor PF
Off
The inverter will not use any internal setpoint for reactive power, but an external setpoint
source can be used.
Danfoss TLX CN+ inverters support a number of third-party grid management units for manag-
ing reactive power.
Constant Reactive Power Q
The inverter will generate a fixed level of reactive power, specified as a percentage of the inver-
ter’s nominal apparent power (S).
The value of constant reactive power Q can be set in the range from 60% (under-excited) to
60% (over-excited).
Variant
TLX CN+/TLX CN Pro+
Nom. Apparent power
(S
nom
)
Reactive power (Q)
under-excited or over-excited
8 kW 8 kVA 0 - 4.8 kVAr
10 kW 10 kVA 0 - 6.0 kVAr
12.5 kW 12.5 kVA 0 - 7.5 kVAr
15 kW 15 kVA 0 - 9.0 kVAr
Table 10.3: Reactive Power Range
Note:
The maximum amount of reactive power is available, when the inverter generates 3% of the
nominal real power and above.
Constant Power Factor PF
Constant power factor specifies a fixed relation between real and apparent power (P/S), i.e. a
fixed Cos (φ).
The power factor PF can be set in the range from: 0.8 under-excited to 0.8 over-excited.
The reactive power generated by the inverter is thus dependent on the real power generated.
Example:
- PF = 0.9
- Generated real power (P) = 10.0 kW
- Apparent power (S) = 10.0/0.9 = 11.1 kVA
Reactive power (Q) = √(11.1
2
-10.0
2
) = 4.8 kVAr
Set the 'setpoint type' to “Off”. This will enable the inverter to accept a setpoint for PF and Q,
transmitted via RS485 from the external source.
View the setpoints of Q or PF under: [Status → Grid Management ].
10. Ancillary Services
88 L00410582-01_02
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