DS200NATOG1ACB - Voltage Feedback Scaling Board

SPECIFICATIONS:

Part Number: DS200NATOG1ACB
Manufacturer: General Electric
Series: LCI Innovation
Product Type: Voltage Feedback Scaling Board
Function: Input-Output Card
Size: 15.9 cm high x 17.8 cm
Temperature: -30 to +65°C
Repair: 3-7 Days
Weight: 2.00 lbs
Country of Origin: USA
Availability: In Stock
Manual: GEI-100225

FUNCTIONAL DESCRIPTION:

DS200NATOG1ACB is a Voltage Feedback Scaling Board manufactured and designed by General Electric as part of the LCI Innovation Series used in VME platforms. The Voltage Feedback Scaling board (NATO) attenuates the AC and DC voltages of an SCR bridge so that bridge voltage feedbacks may be accurately derived. It works in conjunction with two other boards, a VME backplane and a gate distribution and status board. The NATO board contains five identical, series-connected strings of precision resistors. There is one string for each of the three AC phases and one more apiece for positive and negative DC bus voltage. Each string can be configured using a selection of three different input stab connectors and two wire jumpers to attenuate 6900, 4200, 3300, 2200, or 1200 volt input. The outputs of the five strings are connected to a single 20-pin ribbon header (see Table 2). A metal oxide varistor (MOV) prevents the output voltage of each string from becoming too high if the output ribbon circuit is interrupted while the input voltage is present. The burden resistor is located on the gate distribution and status board, rather than the NATO board.

APPLICATION DATA:

RESISTOR STRINGS: The resistors on this board are grouped into five resistor strings denoted by the letters A through E. Each string has three input points (stab connectors) for a total of 15 input points. Each string also has two optional wire jumpers, for a total of 10. See Table 1 to correlate attenuator nominal source volt- ages, stab connectors, wire jumpers, and nominal output voltages.

STAB CONNECTORS: Three stab connectors in each of the five resistor strings allow the user to connect input power to a varying number of the resistors, to accommodate a range of voltages. In the Stab Connector column of Table 1, replace x with the designator of the string to ascertain the appropriate connector. For example, for string C, the relevant stab connectors are JC, JCA, and JCB.

STAB AND JUMPER COMBINATIONS: To accommodate the specified range of input voltages, two board groups were created. G1 contains six resistors per string. G2 substitutes two wire jumpers for the two bottom resistors and thus has four resistors per string. This permits combinations of stab and group numbers to obtain one, two, three, four, five, or six resistors per attenuator string, for inputs of 1200 to 6900 Vrms line-to-line.

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FREQUENTLY ASKED QUESTIONS:

What is the function of the Voltage Feedback Scaling Board?

The board is designed to attenuate AC and DC voltages from an SCR bridge, enabling accurate feedback voltage derivation for control systems.

How is the board configured for different input voltages?

The board features five identical resistor strings, each with three stab connectors and two wire jumpers that allow for multiple configurations to suit various input voltages.

What safety features are included in the board?

A metal oxide varistor (MOV) is included to protect against excessive output voltage if the output ribbon circuit is interrupted while input voltage is still present.