GE 889-E-P1-P1-G1-L-S-S-A-N-N-M-M-P-T-B-SE-N-N-B-4-043X Integrated protection and control device

I. Product Basic Positioning
889 = GE Multilin 889 Generator Integrated Protection Monitoring Device
Usage: For steam turbine / hydro turbine generators, small-scale units, complete protection, monitoring, fault recording, speed / vibration / temperature monitoring, logic control, SCADA communication; core protection equipment for power plants and self-owned power stations
E = English English operating interface firmware

Current Voltage Transformer Input Section (P1-P1-G1)
First section P1: Three-phase current input in J slot
P1 = 1A CT secondary rated current (for small variation ratio CT in conventional units); P5 = 5A (commonly used for large units)
Second section P1: Three-phase voltage PT input, same 1A matching configuration
G1: Grounding zero-sequence current input specification G1 = 1A grounding CT; B5 = 5A grounding input

 Power Supply L
L = 24–48 VDC DC power supply (replacing H = 110/220V AC/DC wide-voltage power supply)

 Low-speed I/O Slot Configuration (S-S)
First S: B slot = 6 RTD temperature measurement inputs (Pt100 standard)
Second S: C slot = second group of 6 RTD temperature measurement
Total 12 winding / bearing temperature collectionHigh-voltage I/O Module (A-N-N-M-M)
A: F slot high-voltage I/O
2 pairs of A-type voltage monitoring contacts, 3 pairs of C-type trip contacts, 7 analog DI
N: G slot first expansion position: no additional analog board card
N: G slot second expansion position: no additional analog board card
M: Reserved expansion position 1: motor auxiliary monitoring board (vibration, excitation current analog quantity collection)
M: Reserved expansion position 2: second analog quantity transducer input board

Communication and Function Expansion (P-T-B)
P: Standard processor hardware platform
T: High-precision rotational speed measurement module (gear disk / Hall rotational speed sensor interface, overspeed / low-speed protection)
B: Base board bus standard version

 Shell and Certification SE
SE = Standard Enclosure Standard metal chassis, UL/CSA power safety certification
VIII. Optional, Language, Terminal, Firmware Version (N-N-B-4-043X)
N: No additional hardware option 1
N: No additional hardware option 2
B: Standard terminal block
4: Hardware platform generation 4 motherboard
043X: Firmware program version 043X (special generator logic setting package)