Description
The Stucke Group SYMAP® (including the core SYMAP-M motor protection, SYMAP-G generator, and SYMAP-BCG configurations) is a high-reliability, microprocessor-based digital protection and bay control device designed for low, medium, and high-voltage power systems. It integrates comprehensive electrical protection functions, automated synchronizing, breaker management, and power management into a single hardware footprint. Utilizing a multi-processor architecture, the device is heavily deployed in demanding marine, oil and gas, and critical infrastructure power distribution networks.
Commercial and Logistics Summary
| Commercial Parameter | Status / Value |
| Condition | New Original (Factory Sealed) or Refurbished (Fully Bench Tested) |
| Availability | Available via certified industrial grid control networks and specialized suppliers |
| Typical Lead Time | 3 to 7 business days worldwide (subject to terminal/IO configurations) |
| Warranty | 12-month comprehensive functional warranty |
| Pricing Note | Price is subject to market conditions and firmware profiles; contact us for a firm quote. |
Technical Specifications & Hardware Architecture
The SYMAP® platform utilizes up to three internal microprocessors (with newer Compact+ versions extending up to five microcontrollers) that run mutual watchdog system routines to cross-supervise internal memory blocks and analog reference voltages.
| Parameter | Specification Value |
| Processor Framework | Distributed Multi-Processor Architecture (CU, MU, GU, ComU) |
| Analog Channels | Up to 17 direct CT/PT inputs (e.g., 3x Feeder CT, 1x Ground CT, 3x Feeder PT, 6x Busbar PT, 1x Ground PT) |
| CT Secondary Currents | 1 A or 5 A nominal inputs (includes integrated shorting bar connectors) |
| Digital I/O (Base/Expanded) | Configuration dependent; up to 44 Digital Inputs / 32 Relay Outputs |
| Event Logging Retentivity | Up to 5,000 non-volatile system events (FIFO principal) |
| Fault Oscillography | Integrated waveform disturbance recorder (6 to 72 samples per cycle) |
| Communication Protocols | Modbus RTU/TCP, Profibus DP, and IEC 61850 (including GOOSE messaging) |
| Chassis Mechanical Profile | Stainless steel housing with high EMC isolation layer |
| Environmental Envelope | Operational from −20 to +70 °C; Type approved by DNV, BV, and Lloyd’s Register |
Protection Profiles (ANSI Codes)
The device supports concurrent operation of all activated protective parameters without processing penalties or cycle-time deterioration. The firmware maps directly to primary standard functions:
- Generator / Motor Protection:
- ANSI 50/51: Definite/Inverse Time-Lag Overcurrent
- ANSI 67 / 67N: Directional Phase / Directional Earth Fault
- ANSI 87G / 87M: Generator / Motor Differential Protection
- ANSI 49: Thermal Replica Overload Monitoring
- ANSI 27 / 59: Undervoltage / Overvoltage Detection
- ANSI 81O/U: Overfrequency / Underfrequency Tracking
- ANSI 32R/F: Reverse Power / Interlocking Forward Power
- Breaker and Sync Controls (ANSI 25): Automated digital synchronization matching voltage, frequency, and phase angle across single or double busbar topologies before closing commands are issued to up to 5 individual circuit breakers.
Engineering Considerations and Field Constraints
1. Current Transformer (CT) Open-Circuit Safeguards
The physical terminal plugs at the rear of the SYMAP® device for current transformer connections are equipped with automatic internal shorting links. If a terminal plug is removed for troubleshooting, the CT secondary loop remains closed automatically. However, engineers must verify that the shorting bar mechanisms are free of debris and fully engaged during maintenance routines to prevent catastrophic high-voltage breakdown across the CT blocks.
2. Hardware Redundancy Configuration
For ultra-critical fail-safe processes, an optional high-current hardware circuit redundancy card (CMA 198) can be run in parallel with the main SYMAP® unit. The CMA 198 works completely autonomously; it will still clear three-phase short-circuit spikes even during a complete breakdown of the station’s auxiliary 24 V DC control voltage supply.
3. Firmware Matching for Substation Automation
When incorporating a SYMAP® relay into an existing IEC 61850 substation bus or a central Power Management System (PMS), ensure the software configuration files (.ICD or .CID) align with the firmware architecture of the bay controller. Misaligned dataset attributes within the Ethernet communication module (ComU) will cause High-Speed GOOSE message dropping, extending communication latencies beyond the standard 2.7 ms threshold.
Frequently Asked Questions
What are the standard symptoms of an optical link or data fault on this device?
If communication breaks down or signal parameters drift out of bounds, the red System LED on the front panel illuminates, and the internal watchdog closes a dedicated global alarm relay output. In parallel, the event logger flags an internal voltage or memory check failure code.
Can the SYMAP® handle complex dual-busbar interlocks?
Yes. The unit features a small internal programmable logic controller (PLC) that enables users to map complex interlocking logics directly inside the relay. This allows engineers to safely manage breaker blocking states across dual-bus and duplex systems based on binary input status from the isolators and earth switches.
