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- TK857V003
- RCU Link Cable
- Sweden
- 160 × 130 × 95 mm
- 0.92kg
- 3BSC950375R1
- Xiamen, China
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Product Profile – ABB TK857V003 (3BSC950375R1)
1. Product Introduction
The TK857V003 (3BSC950375R1) is a high‑performance protection and control relay designed for complex electrical systems. It provides reliable protection functions, high measurement accuracy, advanced communication interfaces, and flexible configuration options for industrial and utility applications.
This relay model is built for environments that require rapid fault detection and precise isolation of electrical faults. With a modular design and robust construction, the TK857V003 delivers consistent performance and long operational life.
2. Brand and Series Information
Brand: ABB Professional Electrical Instruments
Series: TK Series – Protection and Control Relays
The TK Series focuses on protective relays for electrical distribution, motor protection, generator guarding, and automation systems. Devices in this series are engineered for adaptability, high reliability, and integration with modern control and monitoring platforms.
3. Product Parameters – TK857V003 (3BSC950375R1)
| Parameter | Specification |
|---|---|
| Model | TK857V003 (3BSC950375R1) |
| Function | Advanced Protection and Control Relay |
| Rated Control Voltage | 24–250 V AC/DC |
| Frequency Range | 45–65 Hz |
| Relay Outputs | 8 Programmable Outputs |
| Digital Inputs | 6 Digital Inputs |
| Communication Interfaces | Modbus RTU, Ethernet |
| Display | High Contrast Backlit LCD |
| Mounting | DIN Rail / Panel |
| Dimensions (mm) | 160 × 130 × 95 |
| Weight (kg) | 0.92 kg |
| Operating Temperature | ‑25°C to +65°C |
| Protection Rating | IP20 |
| Compliance Standards | IEC 60255 |
| Trip Accuracy | ±1% of Setting |
| Configurable Protection Curves | Yes, Fully Configurable |
| Event Memory Capacity | 4096 Events with Time Stamp |
| Power Consumption | ≤ 12 W |
4. Product Applications
The TK857V003 is widely used in electrical systems requiring dependable protection, monitoring, and control:
• Medium and low voltage distribution boards and switchgear
• Industrial motor protection and process control systems
• Backup protection in power generation plants
• Renewable energy system protection
• Building management systems and automation networks
• Electrical utilities and substation protection
Its advanced communication and configurability make it suitable for systems that need remote monitoring and integration with SCADA or other automation platforms.
5. Product Advantages
The TK857V003 offers the following key advantages:
• High‑Precision Protection: Accurate current and voltage monitoring with precise trip thresholds.
• Robust Design: Reliable operation under extreme temperatures and industrial conditions.
• Flexible Integration: Supports multiple communication protocols including Ethernet for seamless system communication.
• Large Event Memory: Stores detailed event logs for historical analysis and troubleshooting.
• User‑Friendly Interface: Clear backlit LCD and intuitive menu structure for configuration and real‑time status.
• Programmable Logic: Customizable protection curves and logic functions for advanced applications.
• Fast Response Time: Quick detection and isolation of electrical faults, improving overall system safety.
6. Related Models in the Same Series
Below are five models from the TK Series or related protection relay families:
| Model | Rated Voltage | Outputs | Communication | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| TK855 (3BSC950356R1) | 24–250 V AC/DC | 6 Outputs | Modbus RTU | 150 × 120 × 85 | 0.75 kg |
| TK856 (3BSE057021R1) | 24–250 V AC/DC | 8 Outputs | Modbus / Profibus | 160 × 130 × 90 | 0.85 kg |
| TK857 (3BSC950380R1) | 48–300 V AC/DC | 8 Outputs | RS485 / TCP/IP | 160 × 130 × 90 | 0.85 kg |
| TK861 (3BSC950400R1) | 24–230 V AC/DC | 6 Outputs | PROFIBUS | 150 × 120 × 80 | 0.80 kg |
| TK865 (3BSC950420R1) | 24–250 V AC/DC | 8 Outputs | Modbus / Ethernet | 170 × 135 × 95 | 0.90 kg |
7. Other Popular Models From the Same Brand
Here are five popular relays from ABB’s protective relay lineup that are widely used across industries:
| Model | Application | Communication | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| PR630 | Feeder Protection | IEC61850 | 320 × 240 × 160 | 1.8 kg |
| REX640 | Generator Protection | Dual Ethernet | 300 × 200 × 150 | 1.6 kg |
| REF542plus | Transformer Protection | Modbus / IEC61850 | 350 × 270 × 180 | 2.0 kg |
| RET670 | Transmission Protection | IEC61850 / PRP | 360 × 290 × 180 | 2.1 kg |
| RVC160 | Motor Protection | RS485 | 140 × 100 × 70 | 0.65 kg |
8. FAQ – TK857V003
Q1: What does the TK857V003 protect?
A1: It protects electrical systems by monitoring key parameters and isolating faults such as overcurrent, short circuits, and imbalance conditions.
Q2: What control voltage range does this relay support?
A2: The TK857V003 supports a wide control voltage range from 24 to 250 V AC or DC.
Q3: Which communications are built into the device?
A3: It supports Modbus RTU and Ethernet communications for integration with higher‑level control systems.
Q4: How stable is the event memory?
A4: The relay stores up to 4096 detailed events with time stamps for analysis and diagnostics.
Q5: What environmental conditions can it operate in?
A5: It operates in temperatures from ‑25°C to +65°C and is designed for industrial conditions.
Q6: Can the protection curves be adapted?
A6: Yes, protection curves and logic functions are fully configurable to meet different application needs.
Q7: How is the display designed?
A7: The device features a high‑contrast backlit LCD that shows status, measurements, and configuration menus.
Q8: What mounting options are available?
A8: It supports both DIN rail and panel mounting for flexible installation.
Q9: How accurate are the measurement and trip functions?
A9: The trip accuracy is ±1% of the set value, ensuring dependable protection performance.
Q10: Is the unit suitable for networked systems?
A10: Yes, built‑in Ethernet support allows it to communicate with remote monitoring and automation systems.