Reactive energy controller MASTER Fast control Var


Measurement with three current transformers guarantees an analogue reading of the company’s meter. The Master Fast control Var reactive energy controller is the only regulator in the market that offers the possibility of using 3 measuring transformers in addition to the traditional
method of measuring with a single current transformer, as well as providing the functions of an integral power analyzer and controlling the residual leakage currents.

Master Fast control Var is a controller that guarantees excellent preventive maintenance operations by means of programming its alarms and the test options of the capacitor status, offering the maximum supervision and safety of your compensation unit.


The connection of 1 or 3 transformers makes Master Fast control Var the perfect controller in
any installation, allowing the following:

  • Changing from 1 to 3 transformers in the following cases:
    • Changes in reactive energy penalties
    • Changes in consumption habits
    • Significant imbalances in the system
  • Replacing the regulator of any capacitor bank
  • Perfect for installations with up to 4 objective cosφ, since it can adapt to any
    compensation need (different time periods).
  • It can be used with Medium Voltage compensation units.
Voltage inputsPower supply voltage: 110…480 Vc.a.

Tolerance: 10%

Consumption: 6 VA

Frequency: 45…65 Hz

Measurement circuitMeasurement voltage: 525 V.c.a. p-p / 300 V.c.a. p-n

Current measurement: x1 o x3 transformers…/5A or /1A

Leakage currentMeasurement range: I∆prim = 10 mA…1 Ac.a.

Current transformers: WGC Series

AccuracyVoltage and Current: 1%

Cos φ: 2 % ±1 digit

Temperature measurementMeasurement range: 0…80 oC ±3 oC
Alarm relayOutput contact: Switched

Umax and Imax (operation): 250 Vc.a. / 6 A

Output relayNo. of relays: 6 or 12 depending on the type

Umax and Imax (operation): 250 Vc.a. / 6 A

Fan relayOutput contact: Not switched

Umax and Imax (operation): 250 Vac / 6 A

Digital outputsNo. of outputs: 2

Type: NPN Transistor

Umax and Imax (operation): 24 Vc.c. / 50 mA

Digital inputs2
Alarms17, fully configurable
CommunicationsPort: RS-485

Protocol: Modbus / RTU

Operating conditionsTemperature: -20 oC to +60 oC

Relative humidity: 95% without condensation

SafetyInsulation: Category III Class II EN 61010-1

Protection degree: IP51 mounted, IP30 not mounted, in accordance with EN-60529

Control systemPFC (Program that minimises the number of operations)
StandardsIEC 62053-23 (2003-01), IEC 61326-1, EN 61010-1, UL 508

Other powers, voltages and frequencies on request.

Datasheet25/10/20180.1 MB
Manual29/10/20189.3 MB
Programming guide25/10/20181.0 MB
Installation guide 25/10/20181.3 MB

Contact us if you need more information