| Attribute | Value |
|---|---|
| Brand | Crompton Instruments Ltd |
| Product Type | Protector Trip Relay |
| Model Number | 256-PRBG |
| RTD Type | 100 Ohm Platinum |
| Temperature Range | 0 to 200°C |
| Set Point 1 (SP1) | 130°C |
| Set Point 2 (SP2) | 150°C |
| RTD Indication | Internal |
| Output | 0–1 mA into 4k |
| ANSI Device No. | 49 |
| Relay Action | ON Trip (De-energize) |
| Contact Rating | 5A, 250V AC 50/60Hz & 24V DC |
| Auxiliary Supply | 230V, 50Hz |
| Additional Code | 256-PRBG-R2BX-AM-RO-LI-RB |
| Part Number | 431230 1 151952*1 |
| Resistance Range | 100.00 – 175.82 Ohms |
| Series | S05 |
| Country of Origin | Made in UK |
| Weight | 750 gm |
| Condition | Used – 1 Pcs |
| Reference Number | 60080 |
What is a Crompton 256-PRBG Protector Trip Relay?
The advanced Crompton 256-PRBG Protector Trip Relay monitors electrical parameters in real time for the purpose of initiating trip operations when abnormal conditions are experienced. This is an important relay in the protection of motors, generators, transformers, and other high-value equipment against:
- Overcurrent
- Short circuits
- Voltage fluctuations
- Thermal overload
- Faulty circuit conditions
It ensures safe shutdown of electrical machinery before any severe damage occurs, therefore it is an essential part of protection systems, whether industrial or marine.
The relay is designed to provide high accuracy, fast response time, and long-term operational reliability, thus finding applications in demanding environments, such as offshore, industrial plants, and automated machinery setups.
Key Features of the Crompton 256-PRBG Protector Trip Relay
1. Real-Time Fault Monitoring
The relay continuously monitors the parameters of electricity and instantly acts in case critical limits are surpassed.
2. High Accuracy and Stability
Designed to offer precision overload and electrical fault protection for maximum equipment safety.
3. Fast Trip Response
The rapid operation of its tripping mechanism reduces the possibility of damage to electrical machinery, thus limiting downtime.
4. Adjustable Protection Settings
Users can adjust:
- Trip thresholds
- Time delays
- Sensitivity levels
This helps to adapt the relay to a wide range of applications.
5. Compact and Robust Build
Designed for rugged industrial and marine use with durable housing to withstand temperature, vibration, and harsh environments.
6. LED Status Indicators
Clear visual indications enable the operator to instantly identify system conditions, fault states, and relay status.
7. Long Service Life
Designed for reliable long-term operation, with minimal maintenance.
Applications of the Crompton 256-PRBG Protector Trip Relay
Crompton 256-PRBG finds broad applications in many industries where electrical protection is indispensable. The range of its use involves:
1. Marine Electrical Systems
Employed in ships, cargo vessels, offshore platforms, and marine automation systems for motor and auxiliary equipment protection.
2. Industrial Machinery
Ensures safe operation of:
- Motors
- Pumps
- Compressors
- Conveyors
- CNC machines
3. Power Distribution Panels
Set up in the control panels, MCC, and switchgear for system protection.
4. Transformers & Generators
Provides reliable overload and fault protection for high-value power equipment.
5. HVAC Systems
Protects blowers, chillers, and compressors in heavy-duty cooling and ventilation systems.
6. Process Industries
Used in chemical, oil & gas, food processing, and manufacturing plants where continuous operation is critical.
Why Choose the Crompton 256-PRBG Protector Trip Relay?
✔ Proven Reliability
Crompton is a globally trusted brand known for precision instruments and robust electrical components. The 256-PRBG relay is engineered to provide dependable protection even in demanding environments.
✔ Improved Equipment Safety
Its quick detection and trip function prevent catastrophic failures, which prolong the life of motors and electrical assets.
✔ Easy Installation & Integration
Compatible with most standard industrial and marine automation systems, it reduces complexity at installation.
✔ Cost-effective operation
It significantly cuts down on maintenance costs and unplanned downtime by preventing faults or equipment damage.
✔ Designed for Tough Environments
Constructed with rugged construction suitable for harsh marine weather, industrial vibrations, and electrical noise.
✔ Ideal for Automation & Marine Industries
With its fast response and high accuracy, it is perfect for mission-critical applications where safety and uptime are of high importance.







