Siemens UL1066 Voltage Transformers, VT Accuracy, Maximum distance from voltage transformer

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Communication-capable Circuit Breakers

WL Circuit Breaker

The trigger event can be set individually for each waveform buffer. The point at which the trigger event is to take place in the waveform buffer can also be defined. This setting can be used to set the ratio of the pre-event history to the post-event history. If the pre-trigger event history is to be analyzed, the position can be set to 80%. When the event occurs, 0.8 seconds of pre- event history and 0.2 seconds of post-event history are available in the waveform buffer, and an existing COM16 module adds a time stamp to the trigger event.

Each waveform buffer stops independently, depending on the trigger event and can be activated again once the analysis is complete.

A large amount of data (approx. 25 kByte for each waveform) can be downloaded and analyzed using WinPM.Net, the BDA and the ETU776 display. Depending on the option,

a range of zoom options and export functions are available.

Voltage Transformers

For isolation reasons, a voltage transformer is used in conjunction with the Metering Function Plus module. This prevents voltage signals of up to 1kV from reaching the ETU directly via the auxiliary secondary connections.

The metering module (“Metering Function Plus”) can be set to expect 3W or 4W (LL/LG) connections and will adjust the amplitude and phase of the signal as necessary.

Three VTs must be used at all times.

All three VTs should be rated for the nominal system L-L voltage (e.g. 480V) and may have either 100V, 110V or 120V secondary voltages.

The following ratios and suggested and equivalent VTs can be used: 240:120 = 2:1

(ITI Part # 460-240 or 468-240) 480:120 = 4:1

(ITI Part # 460-480 or 468-480)

2/15

600:120 = 5:1

(ITI Part # 460-600 or 468-600)

VT Accuracy

Each Metering Module presents a purely resistive (unity power factor) load to the transformer. Assuming no other devices connected to the VT, a ITI type 486 VT can safely feed 10 metering modules and and still maintain 0.6% accuracy assuming the wiring from the VT to the individual metering modules is twisted pair and kept to a minimum length.

This data applies to ambient temperatures from 30ºC to 50ºC and a primary voltage from 80% to 120% Vn.

Maximum distance from voltage transformer

The maximum distance between the metering function and the voltage transformer depends on the cable size and the desired accuracy class.

Metering VT Settings:

Delta/Wye : Delta

VT Primary: 480 (for example)

VT Secondary: 120 (for example)

Metering VT Settings:

Delta/Wye : Delta

VT Primary: 480 (for example)

VT Secondary: 120 (for example)

For a 14AWG cable, the maximum distance should not exceed 50 m for class 0.5 and 100 m for class 3. In areas with high EMC exposure, shielded cable should be used.

Parameters for the settings of the metering function

The trip unit settings which must be made are:

1)VT Primary Voltage (240V, 480V, 600V)

2)VT Secondary Voltage (100V, 110V, 120V)

3)VT Connection (Wye / LG, Delta / LL)

The following tools and functions are available if the parameters have to be changed:

•WinPM.Net

•WL Config

•BDA/BDA Plus

•ETU776 display

Note: Required primary and secondary overcurrent protection (fusing) not shown for clarity.

WL MODBUS Communication and Electronic Accessories • January 2005

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Contents Powerful ideas Global network of innovationCommunication-capable Circuit Breakers Communication-capable Circuit Breaker Correct Usage Safety GuidelinesQualified Personnel Registered TrademarksIntroduction Overview Introduction Content of the ManualGeneral Cost Saving System SolutionsWL Circuit Breakers-Modular Intelligent Easy PlanningCommunication Bus Systems ModbusCommunication Structure of the WL Circuit Breakers Ethernet WL Circuit Breaker Introduction and Overview Brief Description of the WL Circuit BreakerCubicleBUS Communications Capability of the Electronic Trip Units ETUsFunctional overview of the trip unit system ETU725 ETU727 ETU745Setting range of the Ig Basic Functions ETU725 ETU727 ETU745Basic Functions ETU748 ETU755 ETU776 Communication Metering Data Availability on the CubicleBUSData point group ETU745 Data points with the same source 755 orModbus Module COM16 Pin ConfigurationModbus COM16 Module and the BSS Modbus Write Protection DPWriteEnable Modbus Installation GuidelineCubicleBUS + Data Exchange via the COM16 ModuleMeaning Position and text on the cable CubicleBUS Cubicle BUS LED Meaning Rear Microswitch S46 Middle S47 Front S48Meaning PositionBreaker Status Sensor BSS Metering Function Plus GeneralWaveform buffer Metering Function PlusHarmonic analysis VT Accuracy Parameters for the settings of the metering functionVoltage Transformers Maximum distance from voltage transformerMetering range 81THDC Extended Protective Function Important functions/parameters for communicationsLoad Management Minimum for Communicated Currents Normal Positive Power Flow DirectionSetpoints Event and Trip LogExternal CubicleBUS Modules Rotary SwitchesInstallation CubicleBUS Installation Guidelines Power SupplyMaximum CubicleBUS Configuration CubicleBUS LED Meaning LED DisplayMeaning All other LEDs MeaningTesting the Digital Input and Output Modules DeviceFunctional description Technical data for the digital input moduleDigital Input Module Functional description for changing parameter setsSelector switch position to the right Digital Output Module with Rotary SwitchSelector switch position to the left Delay timeConfigurable Digital Output Module Technical data for the digital configurable output module Trigger event Waveform buffer BPower value ranges W/VA Analog Output ModuleTest function Switch position cosTechnical data for the analog output module Example as illustrated in Graphic ZSI ModuleOperating principle Technical data for the ZSI module It trips after tZSI = 50 ms. Time saved = 250 msCommunication-capable Circuit Breakers General information Output current Inrush current Type Order No Communication-capable Circuit Breakers Modbus Profile for WL Circuit Breaker Supervisory Systems Function 02 Read Discrete Inputs COM16 Supported Function CodesFunction 01 Read Coils Reply Message from slave Function 03 Read Holding RegistersRequest Message to slave Function 07 Read Exception Status Function 04 Read Input RegistersFunction 05 Write Single Coil Function 12 Get Communication Event Log Function 08 DiagnosticsFunction 11 Get Communication Event Counter What the Event Bytes Contain COM16 slave Send EventFunction 15 Write Multiple Coils Function 16 Write Multiple Registers Exception Responses Exception Codes Code Name MeaningBasic Data Type 2 Registers and Default Data Points Default Register ListsBasic Data Type 1 Registers and Default Data Points Basic Data Type 3 Registers and Default Data Points Complete List of Datasets Data bytesSample Dataset Min Max BitsBit Mapping for Breaker Status Register Byte Register DescriptionWL Configurator Brief Description Communication-capable Circuit Breakers Breaker Data Adapter BDA Breaker Data Adapter Plus BDA Plus Benefits of the BDA Brief Description and System RequirementsDescription BDA in Offline Mode or BDA Plus BDA as a Hand-Held Device or BDA PlusBDA Plus as an Ethernet Interface Intranet and InternetGetting started with the BDA Plus What is Java?Circuit breaker requirements Permanent Connection to WL Circuit BreakersTemporary Operation Meaning of the LEDs on the BDATechnical data for the BDA and BDA Plus 4This table provides technical data for the BDA and BDA PlusConnection to the BDA via the Serial Communication System Usually have to be changed. They are shown as a referenceBreaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Breaker Data Adapter BDA Connection to the BDA Plus via the Ethernet Interface Definition of Key TermsExample IP AddressesSubnet Mask BDA IP AddressLanguages and Help Operating Instructions and TroubleshootingOffline/Online Mode Displaying DataOperation Example Password ProtectionSentron PrintingTroubleshooting List Fault Description Solution Siemens Energy & Automation, Inc Siemens Energy & Automation, Inc. All Rights Reserved

UL 489, UL1066 specifications

Siemens UL1066 and UL489 are essential components in the landscape of electrical equipment, specifically in circuit protection and control. These standards ensure reliability, safety, and efficiency in various applications, including industrial, commercial, and residential settings.

The Siemens UL1066 is primarily focused on disconnect switches. These devices are designed to isolate electrical circuits, ensuring the safety of both personnel and equipment during maintenance or in case of faults. One of the key features of UL1066 disconnect switches is their high breaking capacity, enabling them to handle significant fault currents without failure. This characteristic is crucial in protecting downstream equipment from damage caused by short circuits. The UL1066 switches are also known for their robust construction, often featuring a metal enclosure that enhances durability and environmental resistance. Additionally, these switches can be operated manually or remotely, offering flexibility in operation and control.

On the other hand, Siemens UL489 circuit breakers provide comprehensive protection against overcurrents and short circuits. These devices not only interrupt fault currents but also protect connected devices from damage due to overload situations. Key features of UL489 circuit breakers include adjustable trip settings, which allow users to customize the response to overcurrent conditions based on specific application requirements. This adaptability makes them suitable for a wide range of environments, from large industrial plants to smaller commercial buildings.

Both UL1066 and UL489 products are constructed with advanced technologies, such as thermal-magnetic or electronic trip mechanisms in UL489 devices, ensuring precise and timely interruption of fault currents. These technologies promote energy efficiency and stability within electrical systems. In addition, many of these devices are equipped with indication features, providing clear visual status cues for quick assessment in emergency situations.

In terms of characteristics, both UL1066 and UL489 devices adhere to rigorous testing and certification processes to meet UL standards. This compliance assures users of their performance and reliability. Furthermore, the devices are designed to accommodate a wide range of operating temperatures and environmental conditions, making them versatile choices for various applications.

In summary, Siemens UL1066 and UL489 devices are paramount in ensuring safety and efficiency in electrical circuits. Their advanced features and robust construction make them indispensable in protecting both personnel and equipment in an array of industrial and commercial applications.
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