GE G30 Instruction Manual

Also see for G30: Communications manual Communications guide Instruction manual Instruction manual Instruction manual

Contents

5-294 G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUALTRANSDUCER INPUTS/OUTPUTS CHAPTER 5: SETTINGS5Before the DCmA input signal can be used, the value of the signal measured by the relay must be converted to the rangeand quantity of the external transducer primary input parameter, such as DC voltage or temperature. The relay simplifiesthis process by internally scaling the output from the external transducer and displaying the actual primary parameter.DCmA input channels are arranged in a manner similar to CT and VT channels. Configure the individual channels with thesettings 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 automatically generates 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 8inclusive, which is used as the channel number. The relay generates an actual value for each available input channel.Settings are generated automatically for every channel available in the specific relay as shown above for the first channelof a type 5F transducer module installed in slot F.The function of the channel can be “Enabled” or “Disabled.” If “Disabled,” no actual values are created for the channel. Analphanumeric “ID” is assigned to each channel; this ID is included in the channel actual value, along with the programmedunits associated with the parameter measured by the transducer, such as volts, °C, megawatts, and so on. This ID is alsoused to reference the channel as the input parameter to features designed to measure this type of parameter. The DCMAINPUT F1 RANGE setting specifies the mA DC range of the transducer connected to the input channel.The DCMA INPUT F1 MIN VALUE and DCMA INPUT F1 MAX VALUE settings are used to program the span of the transducer inprimary units. For example, a temperature transducer might have a span from 0 to 250 °C; in this case the DCMA INPUT F1MIN VALUE value is “0” and the DCMA INPUT F1 MAX VALUE value is “250.” Another example is a watts transducer with a spanfrom –20 to +180 MW; in this case the DCMA INPUT F1 MIN VALUE value is “–20” and the DCMA INPUT F1 MAX VALUE value is“180.” Intermediate values between the minimum and maximum values are scaled linearly.5.10.2 RTD inputsSETTINGS  TRANSDUCER I/O  RTD INPUTS  RTD INPUT F1(W8)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 automatically generates 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 8inclusive, 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 channelof a type 5C transducer module installed in the first available slot.The function of the channel can be either “Enabled” or “Disabled.” If “Disabled,” there is not an actual value created for thechannel. An alphanumeric ID is assigned to the channel; this ID is included in the channel actual values. It is also used toreference the channel as the input parameter to features designed to measure this type of parameter. Selecting the type ofRTD 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. InFlexElements, the operate level is scaled to a base of 100°C. For example, a trip level of 150°C is achieved by setting theoperate level at 1.5 pu. FlexElement operands are available to FlexLogic for further interlocking or to operate an outputcontact directly. RTD INPUT F1  RTD INPUT F1FUNCTION: DisabledRange: Disabled, Enabled RTD INPUT F1 ID:RTD Ip 1Range: up to 20 alphanumeric characters RTD INPUT F1 TYPE:100Ω NickelRange: 100Ω Nickel, 10Ω Copper, 100Ω Platinum,120Ω Nickel