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Licht MFC-200/P Technical Manual

Parallelism controller
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Parallelism Controller
model MFC-200/P
Technical Manual
Licht

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Summary of Contents for Licht MFC-200/P

  • Page 1 Parallelism Controller model MFC-200/P Technical Manual Licht...

  • Page 2: Table Of Contents

    Connection diagrams ..........17 (MFC-200/P/1 and MFC-200/P/b) Configuration sheet...

  • Page 3: Introduction

    The MFC-200/P controller was developed by Licht for the paralellism supervision and control of 3-phase power transformers and 3-phase groups of monophase transformers. The MFC-200/P can feature up to 6 current loop outputs for position retransmission, 14 relays for electromechanic logic and an RS485 interface for supervision and remote control.

  • Page 4: Available Versions

    Licht http://www.licht-labs.com info@licht-labs.com 2 Available versions To better suit the market’s diversity, the MFC-200/P parallelism controller is available in 3 versions: 1. MFC-200/P/1: controls one 3-phase transformer, possibly networked with other MFC-200/P/1 and MFC-200/P/b devices. 2. MFC-200/P/2: controls a pair of 3-phase transformers, without network option.

  • Page 5: Operating Principle

    Otherwise, transformers with lower outputs become loads to the others, creating circulation currents. The MFC-200/P is designed for power transformers with on-load tap changers. These can adjust their tranformation relation as their loads change, guaranteeing adequate reg- ulation.
  • Page 6 For the purposes of parallel operation, each group is classified as Master, Follower, In- dividual or Disabled. The equivalence Group 3-phase Transformer is only lost when a group is set as Disabled. Otherwise, the MFC-200/P will always attempt to maintain a group’s 3 phases in the same numerical position. Master...

  • Page 7: Operation

    4.2 Manual commands 3-phase transformers or 3-phase groups of monophase transformers configured as Mas- ter or Individual can be directly commanded by the MFC-200/P with a manual com- mand. Whenever the transformer or group is configured as Follower or Disabled, the command is ignored.

  • Page 8: Configuration

    Position 4 Figure 4.3 Raise Command Example (After) 4.3 Configuration The MFC-200/P features 4 keys to access its functions. The procedure to configure any parameter is as follows: 1. Press the P key to enter the parameters menu. 2. Using the keys, choose the desired parameter.

  • Page 9: Calibration

    We recommend this procedure is repeated every time the sensor interconnections are altered significantly. 4.5 Parameter reset The MFC-200/P can be reset to factory settings. This procedure also resets its password to AAAA. To do so, power on the device while pressing C. Rev. A2 (23–01–09)

  • Page 10: Programmable Parameters

    5 Programmable parameters The MFC-200/P was developed to provide the user with the greatest possible flexiblity, such that all supervision and configuration can be executed on-site or remotely through the existing communication channels. We define all user-configurable parameters as follows:...

  • Page 11: Modbus Protocol

    Description: baud rate for the RS485 link. Parameter: Format Options: 8N1, 8E1, 8O1, 8N2. Description: symbol transmission format, where: 8N1: 8 data bits, no parity, 1 stop bit. 8E1: 8 data bits, even parity, 1 stop bit. Rev. A2 (23–01–09) MFC-200/P Technical Manual...

  • Page 12: Dnp3 Protocol (Option)

    Options: 2 to 100 ms. Description: The DNP3 specification states that frames should not have inter-octet gaps. In accordance, the MFC-200/P never inserts inter-octet gaps when transmitting data. However, we allow the option to tolerate gaps in incoming transmissions. Frames featuring inter-octet gaps larger than the Maximum Inter-Octet Gap will be quietly dropped.
  • Page 13 Description: The MFC-200/P is designed for multi-drop scenarios where more than one outstation may transmit over the same line. To handle collision avoidance, a backoff scheme is implemented. Before transmitting, the MFC-200/P always waits for the line to become idle. Once that happens, it waits for T...

  • Page 14: Error Conditions

    Shielding grounded at more than one point. Contact problem. Failure to recalibrate after changing cables. 6.3 Configuration error Configuration errors may occur in the following scenarios: Follower channels without a Master. Master channel with no Followers. More than one Master. Rev. A2 (23–01–09) MFC-200/P Technical Manual...

  • Page 15: Communication Error

    6.4 Communication error Communication errors are characterized by serial (RS485) communication failures be- tween networked MFC-200/P controllers. Each MFC-200/P is responsible for a given transformer or group, and they must exchange position information to correctly operate. Possible causes for communication errors are: More than one MFC-200/P set to the same address.

  • Page 16: A Specifications

    8N1, 8E1, 8O1, 8N2 2 lines, 16 characters each (5 mm). Displays LCD with backlight or VFD. 10 A @ 250 Vac, 0.5 A @ 125 Vdc Relays Galvanic Isolation: 2.0 kV, 60 Hz, 1 min. Rev. A2 (23–01–09) MFC-200/P Technical Manual...

  • Page 17: B Housing

    Licht http://www.licht-labs.com info@licht-labs.com B Housing Rev. A2 (23–01–09) MFC-200/P Technical Manual...

  • Page 18: C Connection Diagrams

    Licht http://www.licht-labs.com info@licht-labs.com C Connection diagrams Rev. A2 (23–01–09) MFC-200/P Technical Manual...
  • Page 19 Licht http://www.licht-labs.com info@licht-labs.com Rev. A2 (23–01–09) MFC-200/P Technical Manual...
  • Page 20 Licht http://www.licht-labs.com info@licht-labs.com Rev. A2 (23–01–09) MFC-200/P Technical Manual...
  • Page 21 Licht http://www.licht-labs.com info@licht-labs.com Rev. A2 (23–01–09) MFC-200/P Technical Manual...
  • Page 22 RS-485 pairs must be terminated at both ends by 120 Ω resistors. Rev. A2 (23–01–09) MFC-200/P Technical Manual...
  • Page 23 Licht http://www.licht-labs.com info@licht-labs.com i. RS-485 devices must be connected in a bus topology. No other network topology (tree, star, ring, etc.) is acceptable. j. Dry contact inputs (if applicable) must free of potentials. Rev. A2 (23–01–09) MFC-200/P Technical Manual...

  • Page 24: D Configuration Sheet (Mfc-200/P/1 And Mfc-200/P/B)

    Licht http://www.licht-labs.com info@licht-labs.com D Configuration sheet (MFC-200/P/1 and MFC-200/P/b) Parameter Possible Settings Selected Setting Parallelism Mode Master, Follower, Individual, Disabled Number of Positions 2 to 50 Synchronism Error Timeout 5 to 100 s Configuration Error Timeout 5 to 100 s...

  • Page 25: E Configuration Sheet (Mfc-200/P/2)

    (See section 5) Relay 13 Configuration (See section 5) Relay 14 Configuration (See section 5) MODBUS Address 1 to 247 MODBUS Format 8N1, 8E1, 8O1, 8N2 MODBUS Baud Rate 9600, 19200, 38400, 57600, 115200 bps Rev. A2 (23–01–09) MFC-200/P Technical Manual...
  • Page 26 1: true Manual Parallel Command (any value) (write-only) Manual Parallel Command (any value) (write-only) Manual Individual Command 1: transformer 1 (write-only) 2: transformer 2 Manual Individual Command 1: transformer 1 (write-only) 2: transformer 2 Rev. A2 (23–01–09) MFC-200/P Technical Manual...

  • Page 27: (Mfc-200/P/B)

    (any value) (write-only) Manual Parallel Command (any value) (write-only) Manual Individual Command 1: transformer A 2: transformer B (write-only) 3: transformer C Manual Individual Command 1: transformer A 2: transformer B (write-only) 3: transformer C Rev. A2 (23–01–09) MFC-200/P Technical Manual...
  • Page 28 Licht http://www.licht-labs.com info@licht-labs.com Rev. A2 (23–01–09) MFC-200/P Technical Manual...

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