IS200VATFG1A - Voltage Attenuator Feedback Board

SPECIFICATIONS

Part Number: IS200VATFG1A
Manufacturer: General Electric
Series: Mark VI
Function: Voltage Attenuator Feedback Board
Availability: In Stock
Operating temperature: 0 to +45 degrees Celsius
Storage temperature: -40 to +70 degrees Celsius
Product type: PCB
Country of Manufacture: United States (USA)

Functional Description

IS200VATFG1A is a voltage attenuator feedback board developed by GE. It is a part of the GE Mark VI control system. The board directly measures the DC bus neutral voltage, providing critical data to the control system. This signal undergoes filtering and conditioning to eliminate the effects of bridge modulation, ensuring accurate monitoring. Under normal conditions, with no motor ground fault, the measured voltage remains close to zero. If a ground fault occurs, the voltage reaches its maximum level, indicating a fault condition. In cases of a partial ground fault, often caused by deteriorated motor insulation, the voltage increases gradually and almost linearly from zero to its peak. To detect faults, the system compares the ground fault voltage (Gnd cur signal) against predefined thresholds, triggering an alarm or trip fault when necessary.

Features

• The board comes with two plug connectors. J1 and J2 are labeled as such, and they allow for high-frequency power supply input and return.
• There are two fiber-optic transmitter connectors (V21/V31) on the board.
• There's also a single LED indicator, five TP test points, and eight stab-on connectors. Only factory or bench testing is permitted.

Unit Data Highway

• The UDH connects the Mark VI control panels to the HMI/Data Server or human machine interface (HMI). Unshielded twisted pair or fiber-optic Ethernet is the network media. If redundant cable operation is provided, unit operation continues even if one cable fails. Dual cable networks are still part of a single logical network. The UDH, like the plant data highway (PDH), can have redundant, independently powered network switches and fiber-optic communication.
• The Mark VI UDH system now supports single-mode cable (SMF). SMF has an advantage over multi-mode cable (MMF) in that it allows for longer cables due to lower signal attenuation per foot. Data from UDH commands is replicated to all three controllers. The master communication controller board (VCMI) reads this data and sends it to the other controllers. UDH data is only transmitted by the UDH communicator (refer to the section, UDH Communicator).

Software Maintenance Tools

• In a ladder diagram format, application software is executed sequentially and represented in its dynamic state. Maintenance personnel can add, delete, or change analog loops, sequence logic, tuning constants, and so on.
• To simplify editing, data points can be selected and dragged on the screen from one block to another. Other features include logic forcing, analog forcing, and frame rate trending.
• The documentation for application software includes the primary elementary diagram, I/O assignments, tuning constant settings, and so on. The software maintenance tools (Control System Toolbox) are included in the HMI and are also available as a separate software package for virtually any Windows 95 or NT-based PC.

WOC is happy to assist you with any of your GE requirements. Please contact us by phone or email for pricing and availability on any parts and repairs.

FREQUENTLY ASKED QUESTIONS

What is IS200VATFG1A?
It is a voltage attenuator feedback board developed by GE.

How is the voltage signal monitored?
The voltage signal is filtered and conditioned to remove the effects of bridge modulation before being monitored.

What is the voltage level when there is no motor ground fault condition?
The voltage will be nearly zero when there is no motor ground fault condition.

What is the voltage level when there is a fault to ground?
When there is a fault to ground, the voltage is at its peak.

What happens to the voltage level in case of a partial ground fault?
The voltage increases almost linearly between zero and the maximum voltage in the case of a partial ground fault, which could be caused by damaged motor insulation.