GE Multilin L90 Line Current Differential System 5-2755 SETTINGS 5.9 TRANSDUCER INPUTS AND OUTPUTS55.9.2 RTD INPUTSPATH: SETTINGS ÖØ TRANSDUCER I/O ÖØ RTD INPUTS Ö RTD INPUT H1(U8)Hardware and software is provided to receive signals from external resistance temperature detectors and convert thesesignals into a digital format for use as required. These channels are intended to be connected to any of the RTD types incommon use. Specific hardware details are contained in chapter 3.RTD input channels are arranged in a manner similar to CT and VT channels. The user configures individual channels withthe settings shown here.The channels are arranged in sub-modules of two channels, numbered from 1 through 8 from top to bottom. On power-up,the relay will automatically generate configuration settings for every channel, based on the order code, in the same generalmanner that is used for CTs and VTs. Each channel is assigned a slot letter followed by the row number, 1 through 8 inclu-sive, which is used as the channel number. The relay generates an actual value for each available input channel.Settings are automatically generated for every channel available in the specific relay as shown above for the first channel ofa type 5C transducer module installed in the first available slot.The function of the channel may be either “Enabled” or “Disabled”. If “Disabled”, there will not be an actual value created forthe channel. An alphanumeric ID is assigned to the channel; this ID will be included in the channel actual values. It is alsoused to reference the channel as the input parameter to features designed to measure this type of parameter. Selecting thetype of RTD connected to the channel configures the channel.Actions based on RTD overtemperature, such as trips or alarms, are done in conjunction with the FlexElements™ feature.In FlexElements™, the operate level is scaled to a base of 100°C. For example, a trip level of 150°C is achieved by settingthe operate level at 1.5 pu. FlexElement™ operands are available to FlexLogic™ for further interlocking or to operate anoutput contact directly.Refer to the following table for reference temperature values for each RTD type. RTD INPUT H1RTD INPUT H1FUNCTION: DisabledRange: Disabled, EnabledMESSAGE RTD INPUT H1 ID:RTD Ip 1Range: Up to 20 alphanumeric charactersMESSAGE RTD INPUT H1 TYPE:100Ω NickelRange: 100Ω Nickel, 10Ω Copper, 100Ω Platinum,120Ω Nickel
