ABB PPD517 3BHE0741576R3011​ Multifunctional Voltage Protection Relay

Description

1. Core Overview & Positioning

2. Key Protection & Control Functions

• Voltage Protection:
  • Overvoltage (59):​ Protects against sustained high voltage, which can damage insulation.
  • Undervoltage (27):​ Protects against low voltage, which can cause motors to overcurrent and stall.
  • Negative Sequence / Voltage Unbalance (47):​ Protects generators and motors from overheating due to unbalanced supply (e.g., from single-phase faults).
  • Residual Overvoltage (59N):​ Detects earth faults in isolated or compensated neutral systems.
  • Voltage Differential (27/59):​ For busbar or transformer protection.
• Frequency Protection:
  • Overfrequency (81O) & Underfrequency (81U):​ Protects generators and loads from damage or instability caused by deviations from nominal frequency (e.g., 50/60 Hz).
  • Rate-of-Change of Frequency (81R):​ Detects severe system imbalances (e.g., sudden loss of generation) for fast load shedding.
• Additional Functions:
  • Auto-reclosing (79):​ For overhead lines.
  • Synchrocheck (25):​ Ensures safe synchronization of two voltage sources.
  • Multipurpose Protection:​ Configurable stages for other needs (e.g., thermal overload, power protection).
  • Control & Automation:​ Programmable logic (CFC) for custom sequences, breaker control, and interlocking.
• Measurement & Monitoring:​ Provides comprehensive metering (V, I, P, Q, S, PF, frequency, harmonics, energy) and detailed event recording.

3. Technical Specifications (Based on Order Code)

• Rated Input:
  • Voltage:​ Defined by order code. Common ranges: R3likely indicates 3-phase voltage input with a nominal voltage (e.g., 110/120V or 220/240V) via potential transformers (PTs/VTs).
  • Current (Optional):​ May include current inputs for power and directional element calculations.
• Power Supply:​ Typically a wide-range DC or AC supply (e.g., 24-48/60 V DC, 110-230 V AC/DC).
• Communication:​ Standard features include:
  • IEC 61850​ (Station bus: MMS/GOOSE; Process bus: Sampled Values).
  • Modbus (RTU over RS-485 or TCP/IP over Ethernet).
  • DNP3.0​ and IEC 60870-5-103/104​ protocols.
• I/O (Binary Inputs/Outputs):​ A configurable number of opto-isolated binary inputs and relay outputs for alarms, trips, and control.
• Housing:​ Compact, modular case for panel mounting (e.g., 1/2 or 1/4 19-inch rack).

4. Part Number Breakdown: 3BHE0741576R3011

• 3BHE:​ Standard ABB prefix for protection and control products.
• 0741576:​ Core product ID for the PPD517 relay.
• R3011:​ Configuration suffix​ defining:
  • R3:​ Voltage input configuration (3-phase, 3-wire or 4-wire, specific VT secondary voltage).
  • 011:​ Package of I/O counts, communication ports, power supply, and other hardware options (e.g., number of binary inputs/outputs, type of Ethernet ports, presence of a rear communication port).

5. System Integration & Engineering

• Role:​ Installed in switchgear panels for protection of incoming feeders, bus sections, transformers, or generators.
• Wiring:​ Connects to Potential Transformers (PTs/VTs)​ for voltage measurement and optionally to Current Transformers (CTs). Its output relays connect to circuit breaker trip coils.
• Configuration:​ Fully programmable using ABB’s PCM600​ or Relion® 5xx series commissioning tool. Engineers set protection parameters (pick-up values, time delays, curves), logic, and communication mapping.
• Integration:​ Communicates with station SCADA, local HMI, or a Bay Control Unit (BCU) via IEC 61850 or other protocols, providing real-time data, alarms, and remote control capability.

6. Typical Applications

• Generator Protection:​ Backup protection for over/under voltage and frequency.
• Transformer Protection:​ LV/HV side voltage protection, overexcitation (V/Hz) protection.
• Busbar Protection:​ Voltage-based schemes (e.g., check synchronizing, busbar undervoltage).
• Feeder Protection:​ For lines where voltage protection is a primary concern.
• Load Shedding Schemes:​ Underfrequency and rate-of-change of frequency protection for system stability.
• Industrial Plants:​ Protection of large motors and process buses.