VARLOGIC NRC12 Varmetric Controller

NRC12 positioning An even higher level of performance In addition to Varlogic NR6/NR12 functions, the Varlogic NRC12 controller also offers: additional measurements: percentage of harmonic current distortion, spectral analysis of network harmonic currents and voltages, the solution to specific applications 4 quadrants, dual cos j, medium voltage application, fixed step improved capacitor bank and step status monitoring easier-to-read interface with graphic display and online help. A communicating model optional communication auxiliary (RS485 Modbus)

Interface 7 buttons: F1/F2: screen navigation Screen: Help graphic 4 navigation buttons Screen: graphic backlit

Interface: sample screens

Interface: Menu structure

Technical data (1) General data operating temperature: 0…60°C storage temperature: – 20°C…60°C standards: IEC/EN 61010-1. EMC: IEC 61326 - UL certification flush-mounted or mounted on 35 mm DIN rail (EN 50022) flush-mounting protection class: front panel: IP41 rear panel: IP20 display: NR6, NR12 type: 65 x 21 mm backlit screen NRC12 type: 55 x 28 mm backlit graphic screen languages: English, French, German, Portuguese, Spanish alarm contact internal temperature sensor separate cubicle fan control contact access to the alarm history.

Technical data (2) Inputs type of connection: phase-to-phase or phase-to-neutral insensitive to CT connection polarity insensitive to phase rotation direction NRC12 : separate measurement and supply input NRC12 : measurement input up to 690 V current input: NR6, NR12 type: CT… X/5 A NRC12: CT… X/5 A and X/1 A input for dual cos phi control external temperature sensor input Outputs dry contacts: AC: 1 A/400 V, 2 A/250 V, 5 A/120 V DC: 0.3 A/110 V, 0.6 A/60 V, 2 A/24 V

Technical data (3) Settings and parameters target cos j setting: 0.85 ind…0.9 cap possibility of dual cos j set point (NRC12 type) manual or automatic setting of controller parameters choice of programs: linear, normal, circular, optimised main step sequences: 1.1.1.1.1 - 1.2.2.2.2 - 1.2.3.4.4 - 1.1.2.2.2 - 1.2.3.3.3 - 1.2.4.4.4 - 1.1.2.3.3 - 1.2.4.8.8 time delay between successive same step energisations: - NR6, NR12 type: 10 … 600 s / - NRC12 type : 10 … 900 s step configuration parameter setting : fixed, auto, disconnected 4-quadrant operation for generator application (NRC12) parameter setting for MV operation with a PT manual operating test control.

Available measurements and information NR6/NR12 NRC12 information supplied Cos j, steps energised Counter recording the number of operations and the step operation time Step configuration (fixed, auto, disconnected) Step status (capacitance loss monitoring) Network characteristics: apparent and reactive currents, voltage, power Temperature inside the cubicle and remote measurement by external sensor Percentage of total harmonic voltage distortion THD (U) Percentage of total harmonic current distortion THD (I) Capacitor bank current overload (Irms/I1) Harmonic voltage and current spectrum (H 3, 5, 7, 11, 13) Alarm history

Alarms and protective devices

Varlogic: Product range and models Model NRC12 available only in the Merlin Gerin version

General communication architecture

Varlogic communication architecture

Varlogic communication composition CCA : Controller Communication Adapter installed on the controller, used to connect the optical fibre Optical fibre connects the CCA to the MCU MCU : Modbus Coupler Unit Modbus network connection RS485 interface, 2/4 wires

Varlogic communication characteristics Modbus RTU protocol RS 485, 2/4 wires Screw terminal connection Modbus slave address 1 to 247 baud rate 1200 to 38400 MCU supply: 10 …30 V DC, 10…20 V AC Certification: Modbus over serial line interoperability test

Communication connection

Communication parameter setting (1)

Communication parameter setting (2)

Communication data Data tables All the Varlogic data can be accessed via Modbus communication measurements: read parameters: read / write Communication via EGX 400 gateway read only data main measurements alarms