siemens
Siemens SIPROTEC 7VK87 Bay Controller
Model: 7VK8722-5DA90-0AA0
4-hour response · Pricing in SAR · Delivery across all KSA regions
7VK8722-5DA90-0AA0 — Siemens SIPROTEC 7VK87 Bay Controller
The Siemens SIPROTEC 7VK87 is a bay controller within the SIPROTEC 5 device family, delivering bay-level intelligence for substation automation in distribution and sub-transmission substations. The 7VK87 handles interlocking, switching sequence control, local/remote HMI, and monitoring of primary switchgear — replacing conventional hardwired interlocking and operator panels with a single configurable IED that communicates natively over IEC 61850 Edition 2 with GOOSE messaging for fast peer-to-peer bay bus communication.
Engineered on the SIPROTEC 5 hardware platform, the 7VK87 shares the same DIGSI 5 engineering tool, hardware modules, and communication infrastructure as the 7SA87, 7UM85, and 7SL87 protection IEDs — allowing substations to be designed with a single engineering environment and a homogeneous spare parts inventory. The device supports CFC (Continuous Function Chart) programmable logic for custom interlocking and switching sequences, IEC 61850 GOOSE-based bay-bus interlocking without hardwired control cables between bays, and IEEE 1588 / GPS time synchronisation for sub-millisecond event timestamping. Its 19-inch rack or panel flush-mount form factor fits directly into the secondary equipment panels of Saudi Arabia's gas-insulated and air-insulated switchgear (GIS/AIS) installations.
SEC (Saudi Electricity Company) has standardised on the SIPROTEC 5 platform for the automation layer of its transmission and distribution substations, and the 7VK87 bay controller is central to the automation architecture of SEC's 33 kV and 132 kV substations being upgraded across the Kingdom as part of the National Grid SA transformation programme. Industrial switchyard automation at Aramco LNG and NGL facilities, SABIC petrochemical complexes, and MARAFIQ utility substations serving Jubail and Yanbu industrial cities relies on the 7VK87's software interlocking to enforce safe switching sequences and prevent dangerous operator errors in complex multi-bus switchyard configurations.
Razz Middle East's protection and automation engineering team commissions SIPROTEC 7VK87 systems in Saudi Arabia, providing DIGSI 5 configuration, IEC 61850 dataset and GOOSE mapping, FAT and SAT testing, and integration to SICAM SCC substation control systems. We maintain a local stock of SIPROTEC 5 spare modules for emergency replacement support.
Technical Specifications
Full specifications for the 7VK8722-5DA90-0AA0
- Functions
- Interlocking, control, monitoring, CFC logic
- Communication
- IEC 61850 Ed 2, GOOSE, MMS, IEC 60870-5-104
- I/O
- 16 DI / 8 DO / 4 AI configurable
- Time Sync
- GPS, IEEE 1588 PTP (<1 µs accuracy)
- Software
- DIGSI 5 (unified SIPROTEC 5 tool)
- Mounting
- 19" rack or panel flush
- Display
- Integrated LCD + LED indicators
- Integration
- SICAM SCC / A8000 control system
Key Features & Benefits
- IEC 61850 Edition 2 native bay controller with GOOSE messaging replaces hardwired control cables between bays, enabling software-defined interlocking that can be modified without re-wiring during switchgear configuration changes.
- CFC (Continuous Function Chart) programmable interlocking logic allows engineers to define custom switching sequences and interlock conditions graphically in DIGSI 5 without dedicated PLC hardware or separate programming language.
- GOOSE-based bay-bus interlocking between multiple 7VK87 and protection IEDs achieves response times below 4 ms — 10x faster than hardwired conventional interlocking — critical for preventing dangerous parallel operation in complex multi-bus substations.
- IEEE 1588 PTP and GPS time synchronisation with accuracy below 1 µs enables precise correlation of events across multiple bays for accurate fault sequence-of-events analysis during transmission disturbance investigations.
- Unified DIGSI 5 engineering tool shared across the entire SIPROTEC 5 product family reduces engineering team training requirements and enables single-tool project lifecycle management from FAT through to operation.
- Homogeneous hardware modules with the SIPROTEC 5 protection IED family allow a single set of spare cards (power supply, CPU, I/O) to cover bay controller and protection relay maintenance across an entire substation.
- SICAM SCC and SICAM A8000 integration via IEC 61850 MMS provides a direct communication path to Siemens' substation control system without gateway devices, simplifying the substation automation architecture.
Industrial Applications in Saudi Arabia
- SEC 33 kV and 132 kV distribution substation bay control as part of the National Grid SA digital substation transformation programme, where GOOSE interlocking replaces thousands of metres of conventional control wiring.
- Industrial switchyard automation at SABIC and Saudi Aramco petrochemical complexes in Jubail, where CFC-programmable interlocking enforces complex switching sequences for 33 kV process supply configurations.
- MARAFIQ 33 kV utility substation automation for Jubail and Yanbu industrial cities, where multiple 7VK87 bay controllers manage the distribution architecture serving hundreds of industrial consumers.
- NEOM utility infrastructure substations where IEC 61850 Ed 2 communications enable the smart grid architecture required for integration of distributed renewable energy sources and demand-side management systems.
- Desalination plant 11 kV and 33 kV switchyard control at SWCC facilities, where software interlocking prevents unsafe switching operations during the complex load-transfer procedures required for maintenance isolation.
- Gas compression station switchyard bay control at Saudi Aramco gas network facilities, where the 7VK87 enforces permissive switching sequences that prevent energisation of earthed circuits.
- Large cement plant 33 kV intake substation bay control, where switching sequence automation ensures safe sequential energisation of kiln, mill, and fan motor feeders after planned maintenance shutdowns.
Industrial Supplier in Saudi Arabia
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