The UR1HH is a product of GE Multilin, part of the Universal Relay (UR series), which performs important protection and control tasks in power systems, as described below:

Main function

Full protection function

Overcurrent protection: can monitor the current in the circuit in real time, when the current exceeds the set threshold, quickly act, cut off the circuit, to prevent damage to electrical equipment due to overcurrent, such as to avoid motor burning due to overcurrent.

Overvoltage and undervoltage protection: continuous monitoring of the voltage, when the voltage is higher or lower than the normal working range, timely protection measures are taken to ensure that the equipment operates in a safe voltage environment, such as preventing the breakdown of electrical components due to high voltage, or the equipment can not start normally due to low voltage.

Frequency protection: Monitor the frequency change of the power system, and act when the frequency exceeds the allowable range to maintain the stable operation of the power system, such as when the power system fails and the frequency is abnormal, and respond quickly to avoid the expansion of the accident.

Fault diagnosis and recording

Have the fault diagnosis ability, can accurately determine the fault type and fault location. In addition, record the time when the fault occurs and related electrical parameters in detail, providing a strong basis for subsequent fault analysis and troubleshooting, and facilitating O&M personnel to quickly locate and resolve the problem.

Communication function

Support a variety of communication protocols, such as Modbus, DNP3, etc., can communicate with substation automation system, remote monitoring center, etc. Realize remote monitoring, parameter setting, and control, so that operation and maintenance personnel can grasp the running status of the equipment in real time, and carry out remote operation and management.

Technical characteristics

High-precision measurement: Advanced measurement technology can accurately measure electrical parameters such as current, voltage, and power, providing accurate data support for protection and control functions.

Fast response time: When a fault is detected, it can react quickly and the action time is short, effectively reducing the impact of the fault on the power system.

Flexible configuration: Users can flexibly configure the protection parameters and action logic of the relay according to the actual application requirements to adapt to different power systems and equipment requirements.

Application scenario

Substation: Used for line protection and transformer protection of substations to ensure the safe and reliable operation of substations and ensure the stable transmission and distribution of power.

Industrial power system: In the power system of industrial enterprises, the motor, generator, switch cabinet and other equipment are protected and controlled to improve the reliability and safety of industrial production.

Renewable energy power generation: used in wind power generation, solar power generation and other renewable energy power generation systems, protect the connection of power generation equipment and the grid, and promote the effective use of renewable energy.

GE Multilin's UR series general relay products are rich, and the models related to UR1HH are related to some functions, characteristics and application scenarios. The following is a detailed introduction for you:

Similar in function but different in performance

UR2HH

Performance improvement: Compared with UR1HH, the measurement accuracy and response speed may be further improved. For example, it is more accurate in the measurement of electrical parameters such as current and voltage, and can detect and respond to faults faster, which is suitable for occasions where the stability and reliability of the power system are highly required, such as critical line protection in large substations.

Feature expansion: Some additional protection features or control policies may be added. For example, with a more complex overcurrent protection characteristic curve, more refined protection actions can be carried out according to different load types and fault conditions to better adapt to diverse power system needs.

UR3HH

Higher integration: More functional modules may be integrated to integrate a variety of protection and control functions into one, reducing the number of devices and footprint, and reducing the complexity and cost of the system. It is suitable for applications where space is limited and equipment integration is required, such as small substations or industrial distribution rooms.

Stronger communication capability: More communication protocols and higher communication rates may be supported in communication, and data interaction and remote control with other devices can be more efficient, which is easy to build large-scale power automation monitoring systems.

Customize models for different application scenarios

UR1HH-I (Industrial grade)

Enhanced environmental adaptability: Specifically designed for industrial environments, it has stronger anti-interference capability, wider operating temperature range and higher protection level. It can operate stably in harsh industrial environments such as high temperature, humidity, dust and strong electromagnetic interference, and is suitable for power system protection in industrial places such as steel plants, chemical plants and mines.

Load adaptability optimization: According to the characteristics of industrial loads, such as the large current impact when the motor is started, the protection characteristics are optimized to better adapt to the operation requirements of industrial loads and ensure the safe and reliable operation of industrial equipment.

UR1HH-A (Aerospace Class)

Special performance requirements: Meet the special requirements for equipment in the aerospace field, such as lightweight design, high reliability, radiation resistance, etc. The use of special materials and processes, reduce the weight of the equipment while improving its stability and safety in the harsh environment of aerospace, suitable for aircraft, satellites and other aerospace equipment power system protection.

Different configuration versions and models

UR1HH-S (Standard)

Basic feature set: With the basic protection and control functions of UR1HH, it meets the application requirements of most conventional power systems. The configuration is relatively simple, the price is more affordable, suitable for cost-sensitive and functional requirements are not particularly complex projects, such as small commercial building power distribution system protection.

UR1HH-P (Advanced Configuration)

Advanced functions and features: Some advanced functions and features are added to the standard configuration. For example, with a more complete fault recording function, can record more detailed fault data; It supports more customized setting options, which is convenient for users to customize according to specific needs, and is suitable for large-scale projects with high requirements for power system operation and management.