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Product code: N/A

ABB T&D Protection Relay 750126/802

Original price was: ¥99,999.00.Current price is: ¥2,546.00.

  • The ABB 750126/802 Protection Relay is a reliable, high-performance relay for industrial and utility T&D systems. It ensures fast and accurate fault detection, breaker tripping, and system protection, supporting high availability and operational safety. The recommended ABB protection relay models provide additional options for substation, feeder, motor, and generator protection across industrial and utility networks.

Detailed content

ABB T&D Protection Relay 750126/802 — Industrial Transmission & Distribution Relay

Product Introduction

The ABB 750126/802 Protection Relay is a high-performance device designed for transmission and distribution (T&D) networks, providing protection, monitoring, and control functions for electrical power systems. It ensures reliable operation of circuits by detecting faults, overloads, and abnormal conditions, enabling fast and accurate tripping of breakers to protect equipment and maintain system stability.

Engineered for industrial and utility applications, the 750126/802 relay offers precision, robustness, and high operational reliability in demanding environments.

Product Parameters

  • Module Type: Protection Relay
  • Brand: ABB
  • Model Number: 750126/802
  • System Compatibility: Industrial and utility T&D networks
  • Primary Function: Electrical protection and control
  • Input/Output: Voltage and current inputs, trip and alarm outputs
  • Operating Mode: Continuous monitoring and protection
  • Mounting Type: Panel or rack-mounted relay module
  • Environmental Rating: Industrial operational environment, standard ambient conditions

Product Specifications

  • Protection Functions: Overcurrent, short-circuit, earth-fault, phase-fault detection
  • Rated Input Voltage: As per system configuration (typically 110–240V AC/DC auxiliary)
  • Current Inputs: Configurable CT input ranges
  • Trip Output: Relay contacts for breaker control
  • Response Time: Fast tripping for critical faults
  • Communication: Optional interface for SCADA or monitoring system
  • Diagnostics: Status LEDs and self-monitoring features
  • Mechanical Construction: Rugged industrial enclosure for panel installation
  • Reliability: Designed for continuous operation under industrial conditions

Application Areas

  • Industrial power distribution systems
  • Utility transmission and distribution networks
  • Substations and switchgear protection
  • Critical infrastructure requiring fast fault detection
  • Renewable energy integration points
  • Manufacturing and process plants with high reliability requirements

Product Usage Instructions

  1. Power Down: Ensure the control system or panel power is turned off before installation.
  2. Mount Relay: Secure the 750126/802 relay into the designated panel cutout or rack slot.
  3. Connect Inputs: Wire voltage and current inputs from the system to the relay according to the wiring diagram.
  4. Connect Outputs: Wire trip and alarm outputs to the respective breakers or indicators.
  5. Configure Settings: Set protection thresholds, trip delays, and other parameters according to system design requirements.
  6. Power Up and Test: Restore system power and verify relay operation using test modes and simulations.
  7. Commissioning: Validate protection performance under controlled conditions before live operation.

Periodic inspection and functional testing ensure long-term operational reliability.

Technical Description

The ABB 750126/802 Protection Relay functions as a dedicated protection device for T&D systems, continuously monitoring electrical parameters and detecting abnormal conditions. Upon detecting overcurrent, short circuits, earth faults, or phase faults, the relay issues trip commands to disconnect faulty circuits and protect connected equipment.

The relay features configurable input ranges, selectable protection functions, and output relay contacts to interface with breakers and alarms. Optional communication modules allow integration with SCADA systems for remote monitoring, control, and event logging. Its robust design ensures long-term durability and reliability in harsh industrial environments.

Recommended In-Stock ABB Protection & Control Modules

No. Model Number Module Category Description
1 REF542Plus Protection Relay Advanced numerical protection relay
2 RET670 Protection Relay Multifunctional relay for T&D systems
3 REF615 Protection Relay Feeder protection relay
4 REM615 Protection Relay Motor protection relay
5 REF630 Protection Relay Transmission line protection
6 REB670 Protection Relay Busbar protection relay
7 REF320 Protection Relay Compact protection relay
8 REF420 Protection Relay High-speed feeder relay
9 RET670N Protection Relay Networked protection relay
10 REX640 Protection Relay Transformer protection relay
11 REF543Plus Protection Relay Overcurrent and earth fault relay
12 REL670 Protection Relay Generator protection relay
13 REB500 Protection Relay Substation bus protection
14 REF610 Protection Relay Line differential relay
15 REF615A Protection Relay Advanced multifunction relay
16 RET670E Protection Relay Extended protection functions
17 REF550 Protection Relay Industrial distribution relay
18 RET670G Protection Relay Generator & transformer protection
19 REF430 Protection Relay Compact T&D relay
20 REF451 Protection Relay Feeder and breaker control relay

Summary

The ABB 750126/802 Protection Relay is a reliable, high-performance relay for industrial and utility T&D systems. It ensures fast and accurate fault detection, breaker tripping, and system protection, supporting high availability and operational safety. The recommended ABB protection relay models provide additional options for substation, feeder, motor, and generator protection across industrial and utility networks.

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