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MASTER Control Var ADVANCED CONTROLLER
Description
MASTER controller has a built in power analyzer allowing the measurement of main electrical parameters (voltage, current, harmonics, active and reactive power, apparent power, etc.). The device gives a detailed information on both, voltage and current harmonic components. MASTER controller measures also ambient temperature and keeps a record of maximum and minimum values of all measured parameters. All this information as analyzer is possible by using 1 or 3 current measurement transformer.

Serial Communications
MASTER controllers are equipped with RS-485 communication with MODBUS protocol. This allows the integration of the PF regulator in a data network driven by a computer
(PC). Enables data recording, remote control, supervision and preventive maintenance of the PF correction equipment itself and of the whole LV network.
AUTO-ON-OFF Function

This function allows to define the operating mode of each individual capacitor step:
Automatic mode (Auto).
Fixed mode (ON): Capacitor is always ON.
Disconnected mode (OFF). Capacitor is always OFF.


Part number

Model

Power (V)

Size (mm)

Steps

Price()

MASTER06

MASTER Control Var 6

110…480

144x144

6

325

MASTER12

MASTER Control Var 12

110…480

144x144

12

400

MASTER14

MASTER Control Var 14

110…480

144x144

14

425

Plug and Play
A series of parameters must be configured when a power factor regulator is installed, to make sure that it operates correctly. Some of these parameters might be hard to know, such as, for example, the voltage phases or the voltage corresponding to the current measured, as well as the current transformer ratio. MASTER has been designed with a smart automatic process that detects the necessary parameters, such as:
C/K: calculates the ratio of the current transformer and the power of the smallest step.
Phase: Identifies the voltage sequence and correspondence with current. In other words, it identifies the UL1, UL2, UL3, when the current measured is IL1, IL2, I
L3 and whether it is connected in the opposite way or not.
Number of stages installed and Program: The system connects all stages in a sequence, finds out how many stages are installed and then calculates the program,
i.e., the power ratio of the capacitors.

Built-in leakage control

MASTER have a built-in circuit to measure the earth leakage current through a WGC transformer. The regulator is able to measure the individual leakage of each capacitor. This allows to disable a damaged capacitor if an excess of leakage current is detected without interrupting the supply service.

Safety and maintenance

MASTER performs a capacitor test every time that a capacitor step is switched ON. The real power and the leakage current of each step can be displayed.
Up to 14 different alarm conditions can be programmed.
Internal counter register which counts the number of operations of each individual capacitor step
Digital inputs
Digital outputs
Fan relay with internal sensor for forced ventilation
Set up of 4 different cos φ for compensation in different time periods
Suitable for medium voltage automatic capacitor banks
Note: Version for static switches with thyristors (on request)

Technical Characteristics

Power supply 110 ... 480V ac ±10 %; 50 / 60 Hz ±10 %
Voltage measurement Up to 525 V a.c. PP/ 300 V a.c. PN
Power supply cables Section 1,5 mm2 , gl 0.5 to 2 A protection fuse
Current measurement circuit 1 or 3 current transformer (CT), .../5 A or .../1 A,
Min. cable section. 2.5 mm2
Leakage current measurement circuit Nominal current of transformer secondary: Isec = 2 mA AC.
Current transformer type WGC
Current measurement margin Current I: 0.05 ... 5 A AC (maximum overload +20%)
Leakage current I: 0.01 ... 1 A AC(maximum overload +20%)
Measurement accuracy Voltage and current: 1 %; cos φ : 2 % ± 1 digit
Temperature measurement External temperature approximation. Range: 0 ... 80oC. Accuracy: ± 3 oC
Consumption 8.2 VA (empty); 9.3 VA (6 relays); 11 VA (12 relays)
Output Relays. Contacts for Umax. 250 Vac., 4 A AC., AC1.
Cabling and output relay protection Cable section 1.5 mm2,
protection with circuit breaker (C curve) of 6 A or gl 6 A fuse
Alarm relay Switched relay for use exclusively for the alarms
Standards IEC 62053-23 (2003-01) Ed. 1.0 , IEC 61326-1, EN61010-1 , UL 508
EN 61000-6-1/-6-3
Safety/Insulation Category III, Class II , according to EN 61010-1
Protection degree IP40 (equipment mounted, cabinet front panel)
IP30 (equipment not mounted) according to EN-60529
Admissible environmental conditions Temperature: -20 ... +60oC; Relative humidity: max. 95% (without condensation). Max. altitude: 2000 m
Control system FCP (a program that minimises the number of operations)
Communications Interface: RS485. Protocol: MODBUS. Speed: 9600, 19200, 38400

Reactive Power Controllers
Description
Reactive power controllers MCE ADV, PFCL and MASTER are designed to measure the reactive power of an installation and to give the necessary instructions for connecting and disconnecting capacitors in order to maintain the desired cos φ .
All the controllers are commanded by a microprocessor that ensures an uniform ageing of contactors and capacitors by using a circular connection sequence that takes into account the time that each capacitor has been switched on.
Power factor value to be reached can be adjusted in a continuous way, between 0.85 inductive and 0.95 capacitive.
Standard working programs for controllers are 1:1:1:1,
1:2:2:2, 1:2:4:4, 1:2:4:8 and 1:1:2:2.
Advantages
Uniform ageing of the capacitors and contactors
High speed operation with less number of switchings
True rms measuring circuit, insensitive to harmonics
Automatic disconnection of all the capacitors in the case of
a failure in the electrical network
Detection and automatic indication of current transformer
wrongly connected
Digital cos φ display
Adjustable operation delay
Power factor alarm relay (PFCL/MASTER)
Harmonic distortion alarm relay (PFCL/MASTER)
Some others advanced features, depending on the model.
Range
MCE ADV, of 6 or 12 steps, for standard automatic bank.
PFCL, available with 6 and 12 relays, size 144x144mm with special alarms and communication.
MASTER, available with 6, 12 and 14 relays, size 144x144mm with special alarms and communication.

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