GE b30, Instruction Manual

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CHAPTER 2: PRODUCT DESCRIPTION SIGNAL PROCESSING
B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-17
2
2.4 Signal processing
2.4.1 UR signal processing
The UR series relays are microprocessor-based protective relays that are designed to measure power system conditions
directly via CT and VT inputs and via other sources of information, such as analog inputs, communications inputs, and
contact inputs. The following figure shows the overall signal processing in URs.
An analog low pass anti-aliasing filter with a 3 dB corner frequency is set at 2.4 kHz and is used for current and voltage
analog filtering as well as signal conditioning. The same filtering is applied for phase, ground currents, phase-to-phase
(when applicable), and auxiliary voltages. The 2.4 kHz cut-off frequency applies to both 50 Hz and 60 Hz applications and
fixed in the hardware, and thus is not dependent on the system nominal frequency setting.
CT/VT MODULES
(not available for the C30) | 8L | Standard 4CT/4VT with enhanced diagnostics
| 8N | Standard 8CT with enhanced diagnostics
| 8M | Sensitive Ground 4CT/4VT with enhanced diagnostics
| 8R | Sensitive Ground 8CT with enhanced diagnostics
INTER-RELAY COMMUNICATIONS | 2A | C37.94SM, 1300 nm single-mode, ELED, 1 channel single-mode
| 2B | C37.94SM, 1300 nm single-mode, ELED, 2 channel single-mode
| 2E | Bi-phase, single channel
| 2F | Bi-phase, dual channel
| 2G | IEEE C37.94, 820 nm, 128 kbps, multimode, LED, 1 Channel
| 2H | IEEE C37.94, 820 nm, 128 kbps, multimode, LED, 2 Channels
| 2I | Channel 1 - IEEE C37.94, multimode, 64/128 kbps; Channel 2 - 1300 nm, single-mode, Laser
| 2J | Channel 1 - IEEE C37.94, multimode, 64/128 kbps; Channel 2 - 1550 nm, single-mode, Laser
| 72 | 1550 nm, single-mode, Laser, 1 Channel
| 73 | 1550 nm, single-mode, Laser, 2 Channel
| 74 | Channel 1 - RS422; Channel 2 - 1550 nm, single-mode, Laser
| 75 | Channel 1 - G.703; Channel 2 - 1550 nm, single-mode Laser
| 76 | IEEE C37.94, 820 nm, 64 kbps, multimode, LED, 1 Channel
| 77 | IEEE C37.94, 820 nm, 64 kbps, multimode, LED, 2 Channels
| 7A | 820 nm, multimode, LED, 1 Channel
| 7B | 1300 nm, multimode, LED, 1 Channel
| 7C | 1300 nm, single-mode, ELED, 1 Channel
| 7D | 1300 nm, single-mode, Laser, 1 Channel
| 7E | Channel 1 - G.703; Channel 2 - 820 nm, multimode
| 7F | Channel 1 - G.703; Channel 2 - 1300 nm, multimode
| 7G | Channel 1 - G.703; Channel 2 - 1300 nm, single-mode ELED
| 7H | 820 nm, multimode, LED, 2 Channels
| 7I | 1300 nm, multimode, LED, 2 Channels
| 7J | 1300 nm, single-mode, ELED, 2 Channels
| 7K | 1300 nm, single-mode, Laser, 2 Channels
| 7L | Channel 1 - RS422; Channel 2 - 820 nm, multimode, LED
| 7M | Channel 1 - RS422; Channel 2 - 1300 nm, multimode, LED
| 7N | Channel 1 - RS422; Channel 2 - 1300 nm, single-mode, ELED
| 7P | Channel 1 - RS422; Channel 2 - 1300 nm, single-mode, Laser
| 7Q | Channel 1 - G.703; Channel 2 - 1300 nm, single-mode Laser
| 7R | G.703, 1 Channel
| 7S | G.703, 2 Channels
| 7T | RS422, 1 Channel
| 7W | RS422, 2 Channels
TRANSDUCER INPUTS/OUTPUTS | 5A | 4 DCmA inputs, 4 DCmA outputs (only one 5A or 5D module is allowed)
| 5C | 8 RTD inputs
| 5D | 4 RTD inputs, 4 DCmA outputs (only one 5A or 5D module is allowed)
| 5E | 4 DCmA inputs, 4 RTD inputs
| 5F | 8 DCmA inputs
UR - ** - *