GE IS200VTCCH1CBD Control PCB

Description

GE General Electric Technical Specifications: IS200VTCCH1CBD

The following conventions are used for the remainder of this chapter:

• It is assumed the relay VT and CT inputs are wired in accordance with Figure 3–9: TYPICAL WIRING DIA

GRAM on page 3–7. With these connections, and assumed where ever phase angles are noted, a unity

IS200VTCCH1CBD power factor current in the primary circuit flows into the relay current marked terminal, with no phase shift

with respect to the corresponding phase-neutral voltage.

• Phase rotation of the relay test set is ABC.
• A current which lags a voltage has a positive phase angle.
• Phase A to neutral voltage is indicated by Van (arrowhead on the “a“).
• Phase A to B voltage is indicated by Vab (arrowhead on the “a“).
• The sign convention for power parameters is as shown in Section 6.3.6: POWER on page 6–11.
• The actual value display at the beginning of some sections is the display for the measured parameter. All

IS200VTCCH1CBD actual values are mentioned with their “path” as a means of specifying where to find the particular mes

sage. For instance, the analog input, which in the message structure is located under actual values page

A2 METERING as the first message under subheading ANALOG INPUT, would be written as: A2 METERING \ ANA

LOG INPUT \ ANALOG INPUT.

Excluding the tests which check the data acquisition of AC system currents and voltages, tests may be per

IS200VTCCH1CBD formed using the powerful simulation feature of the relay, without the need of external AC voltage and current

inputs. System parameters, such as current and voltage phasor information, are entered as setpoints. When

placed in simulation mode, the relay suspends reading actual AC inputs, and uses the programmed phasors to

generate sample values which are placed in the Trace Memory. All metering calculations and logic associated

with protection, monitoring, and control, are performed normally, using phasors calculated from the samples

IS200VTCCH1CBD placed in the memory instead of phasors generated from the input parameter data acquisition system. The

advantage of using simulation is that all metering calculations can be proven without the inaccuracies associ

ated with current and voltage sources.

Assuming that the simulation feature is not used, the following equipment is necessary to perform any test

included in this chapter:

General Purpose:

• 3φ variable AC current and voltage source (V, A, φ, Hz)
• 3φ power multimeter (V, A, φ, Hz, W, var, VA, Wh, varh, PF)
• variable DC mA source
• accurate timing device
• multimeters

Specific Purpose:

• Synchrocheck requires two single phase variable voltage sources with adjustable frequency and phase.
• Underfrequency requires a dynamic relay test set with at least two preset modes.
• Distance-to-fault: requires a dynamic relay test set with at least three preset modes.
• Analog Input Rate-of-Change requires a DC current generator with the capacity to generate current ramps

adjustable for duration’s from 1 minute to 2 hours, from 0-20 mA.

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