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Raytech MUX R Instruction Manual

Multiplexer for transformer testing
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Summary of Contents for Raytech MUX R

  • Page 2: Table Of Contents

    Contents Safety Precautions.......................... 3 Description ............................4 Advantages and Features ........................4 Example: Block Diagram ........................4 Example: Schematic Diagram .......................5 Overview ............................6 Front..............................6 Back ..............................6 Using Multiplexer Hardware......................7 Case 1: One Winding Resistance Meter (WR) and one Multiplexer............7 4.1.1 Schematic Diagram: .........................7 4.1.2 Comment............................8...

  • Page 3: Safety Precautions

    Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the multiplexer. Return the multiplexer to a Raytech service department for service to ensure proper operation and that safety features are maintained.

  • Page 4: Description

    Description Raytech Multiplexer is designed to reduce cabling time and increase test performance. It is meant to be used with Raytech Winding Resistance (WR) and Turns Ratio Meters (TR- MARK II/III). Any Multiplexer configuration can be easily controlled by a Winding Resistance Meter touch panel or by remote.

  • Page 5: Example: Schematic Diagram

    Here you will find more details about how the example in chapter ‘2.2 Example: Block Diagram’ would be set up with Multiplexers and Raytech devices. In later Chapters, this kind of diagram will be used to illustrate several Multiplexer Setups.

  • Page 6: Overview

    3 Overview 3.1 Front Status Lamp 3.2 Back NOTE ⇒ Multiplexers do not need a Main Power Switch. They will automatically be switched on, when the controlling Winding Resistance Meter starts 90158-1.08 Instruction Manual Multiplexer Page 6 of 40...

  • Page 7: Using Multiplexer Hardware

    System based on Raytech Multiplexers offers to you. A complete system based on Raytech equipment is called Automatic Transformer Observing System (ATOS). Ask your local vendor about it.

  • Page 8: Comment

    4.1.2 Comment This is the minimum configuration for a Multiplexer use. A Raytech Winding Resistance Meter is controlling a Multiplexer. Every winding resistance of one winding system (primary, secondary, tertiary) can be measured with one cabling. In other words: to measure every winding of a standard H/X transformer, you have to connect your system only twice to the transformer under test.

  • Page 9: Connections: One Wr100 And One Multiplexer

    4.1.3 Connections: One WR100 and one Multiplexer Start with the Option cable: Nr. Cable Type Order Nr. Connect on Mux Connect on WR Option Cables 30493-100 Option In / Out Option Out Continue with connecting Current and Potential Cables Nr. Cable Type Order Nr.

  • Page 10: Case 2: One Wr, One Tr And Two Multiplexers

    4.2 Case 2: One WR, one TR and two Multiplexers 4.2.1 Schematic Diagram: 90158-1.08 Instruction Manual Multiplexer Page 10 of 40...

  • Page 11: Comment

    Here the Multiplexers will do all the work for you. Two Multiplexers also give you the possibility to connect a Raytech TR-Mark II or TR-Mark III. Then TR measurement can be done with the same cabling.
  • Page 12 Then connect TR (and T-Rex) to Multiplexer: Nr. Cable Type Order Nr. Connect on Mux Connect on TR Standard TR cable 30015-100 Continue with connecting Current and Potential Cables Nr. Cable Type Order Nr. Connect on Mux Connect on WR Sense Cable (blue, green) 30492-100 Channel +/-...

  • Page 13: Case 3: Two Wr, One Tr And Two Multiplexers

    4.3 Case 3: Two WR, one TR and two Multiplexers 4.3.1 Schematic Diagram: 90158-1.08 Instruction Manual Multiplexer Page 13 of 40...

  • Page 14: Comment

    4.3.2 Comment Often primary and secondary winding systems have very different winding resistances. To get reliable results, different currents ranges are needed for the two winding systems. If you add a second WR to the example in chapter ‘4.2 Case 2: One WR, one TR and two Multiplexers’, you get the possibility to measure both winding systems with different currents at the same time.
  • Page 15 Then connect TR (and T-Rex) to Multiplexer: Nr. Cable Type Order Nr. Connect on Mux Connect on TR Standard TR cable 30015-100 Go on with connecting Current and Potential Cables Nr. Cable Type Order Nr. Connect on Mux Connect on WR Sense Cable (blue, green) 30492-100 Channel +/-...

  • Page 16: Case 4: Two Wr, One Tr And Three Multiplexers

    4.4 Case 4: Two WR, one TR and three Multiplexers 4.4.1 Schematic Diagram: 90158-1.08 Instruction Manual Multiplexer Page 16 of 40...

  • Page 17: Comment

    It can be measured in series and you can safe one WR meter. Raytech TR-Mark II/III will on X side be connected to secondary and tertiary Multiplexer. The operator can easily command TR measurement primary to secondary or primary to tertiary.
  • Page 18 Then connect TR (and T-Rex) to Multiplexer: NOTE ⇒ If there is no T-Rex in your system, connect cables from Multiplexer directly to TR-MARK III. Nr. Cable Type Order Nr. Connect on Mux Connect on TR Standard TR cable 30015-100 Special Y-TR Cable 30573-100 90158-1.08 Instruction Manual Multiplexer...
  • Page 19 Go on with connecting Current and Potential Cables Nr. Cable Type Order Nr. Connect on Mux Connect on WR Sense Cable (blue, green) 30492-100 Channel +/- Channel +/- Current Cable (black) 30491-100 Current +/- Current +/- Current Jumper Cable (black) 30491-100 Current +/- 90158-1.08 Instruction Manual Multiplexer...

  • Page 20: Multiplexers Tap Changer Interface

    4.5 Multiplexers Tap Changer Interface 4.5.1 General Description Every winding system could have its own tap changer. They are easy to control with Multiplexers; every Multiplexer is equipped with a powerful tap changer interface. Hardware: 2 relay contacts, normally open, 250V / 3A 2 relay contacts, normally open, 60V / 3A 2 digital in, prepared for tap changer use 2 digital in, ready for general use.

  • Page 21: Pin Assignment And Schematic Of Tap Changer Interface

    4.5.2 Pin Assignment and Schematic of Tap Changer Interface NOTE ⇒ Use the supplied 4 Pin and 14 Pin Din Connector to connect your Tap Changer individually to the Multiplexer. Pin Assignment is as followed: Every Element in the ‚Multiplexer’ field can be set or read by the controlling WR unit or its remote control.

  • Page 22: Using Multiplexer Software

    5 Using Multiplexer Software Raytech Multiplexers are fully controlled by a Raytech Winding Resistance Meter, or its remote interface. NOTE ⇒ Please Make sure, your Winding Resistance Meter Firmware is ready to control a Multiplexer. If it is not ready or if you are not sure, please read Chapter ‘7 Firmware update’.

  • Page 23: Multiplexer Indications On Wr Touch Screen

    5.1.1 Multiplexer Indications on WR Touch Screen This Indication shows that the specified Multiplexer Configuration is correctly found and working. The red box indicates, that something is not optimal with a Mux. Ether an unallocated Multiplexers is found or a Multiplexer is ready for cleaning. Touch the Indication to get to the Multiplexer configuration Menu.

  • Page 24: Transformer Profiles

    5.2 Transformer Profiles Raytech winding resistance meters can be used in a simple mode. Then measurements can be done very fast without entering any additional data. But in simple mode, the device does not know anything about the test object. Measurements can be stored, but the assignment to winding systems and so on must be done manually.

  • Page 25: Multiplexer Menu Without Transformer Profiles

    5.3.1 Multiplexer Menu without Transformer Profiles NOTE ⇒ Please see ‘90163-X.XX Instruction Manual WR-XX-Rack’ or ‘90164- X.XX Instruction Manual WR-XX’ for instructions about switching the use of transformer profiles on and off When multiplexer menu (config) is opened as described in 5.3 Controlling a Multiplexer and no profiles are used, the following screen appears: Touch to open keyboard to...
  • Page 26 The displayed Matrix shows, how your Winding Resistance Meter is switched to the connected transformer or other test object. Current and Potential (Channel) are always switched to the same configuration. Rows show where positive WR connections are switched to, while columns show where negative connections are switched to.

  • Page 27: Multiplexer Menu When Using Transformer Profiles

    Because of the transformer profile, a Raytech winding resistance meter knows how to switch a Multiplexer to measure a transformer. By touching the Mux switching combo box, a selection of possible relay configuration appears. By touching, a configuration can be selected and Multiplexers will be switched automatically.

  • Page 28: Controlling Two Multiplexers Connected To One Wr

    5.4 Controlling two Multiplexers connected to one WR The control concept and control screens remain the same, no matter how many Multiplexers are connected to a WR. But the following chapters show how Multiplexers are thought to be used. Let’s assume you have the configuration shown in chapter ‘4.4 Case 4: Two WR, one TR and three Multiplexers’.

  • Page 29: Measure Secondary And Tertiary Winding System Resistances Separately

    5.4.2 Measure secondary and tertiary winding system resistances separately The schematic besides shows, how only the secondary winding resistance is measured. Notice what MUX C is doing. This mode of MUX C is called “Bypass”. Choose ‘Off’ in the Multiplexer control screen (Config). If you have a look to chapter ‘9 A look under the hood’...

  • Page 30: Turns Ratio Measurement

    5.5 Turns Ratio Measurement To measure turns ratio with a TR-MARK II or TR-MARK III, two or three multiplexers are needed. The following procedure explains hot to bring all connected Multiplexers into turns ratio mode. 1) Switch Mux A, choose TR A:B or A:C In case of using three Multiplexers, the Multiplexer on the high voltage side (Mux A) is used do control if turns ratio...

  • Page 31: Hooking Up A Transformer

    NOTE ⇒ No extra external leads or jumpers are required when using the Raytech Multiplexer. All interconnections are made internally and controlled by touch panel or by remote. A color scheme and text on cable ends help to do the cabling to test object. Labels are located near plugs and clamps of cables.

  • Page 32: Firmware Update

    7 Firmware update NOTE ⇒ As Raytech GmbH always tries to increase comfort and quality of products, sometimes firmware updates may be available. Ask your local vendor, or visit our website www.raytech.ch and have a look for new firmware releases.

  • Page 33: Update Multiplexer

    7.2 Update Multiplexer It is always recommended to use the latest version of Multiplexer firmware. To check the installed firmware version or update to a new firmware, follow the procedure below: NOTE ⇒ Only a Multiplexer A (WRMUX A) can be updated. You may have to change cabling to do that.
  • Page 34 Connect a USB Memory Stick containing the new firmware version in its root directory to the controlling WR. Touch the button ‘Update Firmware to get to the update screen. Chose your firmware in the displayed list and touch ‘Install’. 90158-1.08 Instruction Manual Multiplexer Page 34 of 40...

  • Page 35: Cleaning Relays For Maximum Performance

    8 Cleaning Relays for maximum performance General For a maximum performance and a minimum relays contact resistance, a Multiplexer will ask from time to time for a cleaning cycle. The advice to do a cleaning cycle will be displayed on the commanding Winding Resistance Meter screen.

  • Page 36: Doing A Cleaning Cycle

    8.2 Doing a cleaning cycle NOTE ⇒ For additional safety, please switch Multiplexers to ‘Bypass’ before following the instructions bellow. When it is time to do a cleaning cycle, You will notice the Multiplexer indication on the bottom right of the Winding Resistance screen.
  • Page 37 Shows Help Leads back to main menu Stopps a running cleaning cycle Starts a cleaning cycle Shows relevant information for cleaning of selected Multiplexer 90158-1.08 Instruction Manual Multiplexer Page 37 of 40...

  • Page 38: Look Under The Hood

    To give you a better understanding of what Multiplexer really is, see the following schematic diagram. In a way a Multiplexer is a micro controller based relay box, containing features for transformer measurements based on Raytech instruments. 90158-1.08 Instruction Manual Multiplexer...

  • Page 39: Specifications

    It is strongly recommended to magnetize a transformer first on the primary side to avoid induced high voltage. WR: Raytech Winding Resistance meters are called WR. TR: Raytech Turns Ratio meters are called TR. 90158-1.08 Instruction Manual Multiplexer...

  • Page 40: Good To Know

    12 Good to know Raytech Integrated Safety Unit is designed to give you a central interlock system and a central connection point for a warning lamp. It comes in a 19’’ 4U rack version and also supplies Raytech devices with fused electrical power.

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