Auxiliary electromechanical relay PCS-974

IEChigh-reliabilityhigh power

Overview
PCS-974 is a mechanical auxiliary relay (IED) for transformer and generator non-electrical protection. It provides 16 high-power-pickup binary inputs designed for mechanical element monitoring, alarming and tripping, reducing susceptibility to EMI and improving operational reliability.

Protection and control

• Up to 16 channels for mechanical protection (e.g., winding temperature, oil temperature, Buchholz, gas/pressure, oil level)
• Self-diagnostic functions
• Event recorder: 1024 change-of-binary-input events, 1024 supervision events, 1024 operation logs
• Clock synchronization via IRIG-B, SNTP, PPS and PPM

Communication

• Up to four 10Base-T/100Base-TX copper Ethernet ports supporting IEC 61850 (MMS, GOOSE), DNP3.0 or IEC 60870-5-103 over TCP/IP
• Up to two 100Base-FX optical Ethernet ports (shared with copper ports) supporting IEC 61850, DNP3.0 or IEC 60870-5-103
• Two RS-485 serial ports for IEC 60870-5-103
• One RS-485 serial port dedicated to clock synchronization

User interface

• Front HMI with large LCD and 9-button keypad
• Front RJ-45 port for testing and configuration
• Rear RS-232 or RS-485 port for printer
• Language selection: English + one selected language
• Configuration assistant: PCS-Explorer

Technical specifications & applications

• Model: PCS-974
• Product type: Transformer/generator auxiliary mechanical relay (IED)
• Binary inputs: 16 high-power-pickup inputs for mechanical element monitoring, alarming and tripping
• Supported protocols: IEC 61850-8-1 (MMS), IEC 61850 GOOSE, IEC 61850-9-2 Sampling Value (SV); DNP3.0; IEC 60870-5-103
• Ethernet: up to 4 x 10/100Base-TX copper; up to 2 x 100Base-FX optical (shared)
• Serial: two RS-485 for IEC 60870-5-103; one RS-485 for clock sync; one RS-232/RS-485 for printer
• Event recorder capacity: 1024 change-of-binary-input events; 1024 supervision events; 1024 operation logs
• Clock sync: IRIG-B, SNTP, PPS, PPM
• HMI: large LCD with 9-button keypad
• Front interface: RJ-45 port for testing and setting
• Applications: mechanical protection for transformers and generators (winding/oil temperature, Buchholz, gas/pressure, oil level)
• EMC mitigation: high-power-pickup design to reduce electromagnetic interference (EMI)