General Electric UR8LH
General Electric UR8LH
General Electric UR8LH
General Electric UR8LH
General Electric UR8LH
General Electric UR8LH
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UR8LH

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The General Electric UR8LH CT/VT Module is a dedicated current and voltage transformer input module designed for the GE Multilin Universal Relay (UR) series. It converts high-voltage and high-current power system signals into low-level analog signals for accurate relay processing and protection applications in electrical networks and substations.
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Technical specifications for UR8LH

  • Manufacturer:
    General Electric
  • Part Number:
    UR8LH
  • Product Family:
    GE Multilin
  • Phase CTs:
    3-1A/5A
  • Ground CTs:
    1-1A/5A
  • VTs:
    3ph+1Aux/50-240V
  • Frequency:
    50/60Hz
  • Application platform:
    GE Multilin UR series Universal Relay
  • Weight:
    1.2 kg
  • Estimated shipping dimensions:
    4x18.5x17.2cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Compatibility Configurability Application

Features:

  • CT/VT Module supports 4 CT and 4 VT input channels for full three-phase power system monitoring.
  • CT/VT Module uses high-resolution A/D conversion technology for accurate signal sampling and measurement.
  • CT/VT Module is fully compatible with GE Multilin UR series relays requiring firmware version 4.0x or higher.
The General Electric UR8LH CT/VT Module is a critical input component in modern power protection systems, designed to interface directly with high-voltage electrical networks. It converts primary system currents and voltages into precise secondary signals that can be processed by protective relays. This ensures that system operators receive accurate real-time electrical data for monitoring and decision-making. The General Electric UR8LH CT/VT Module plays an important role in maintaining grid stability and equipment safety.

In industrial and utility environments, the General Electric UR8LH CT/VT Module is widely applied in substations, generation facilities, and distribution networks. Its ability to handle three-phase and auxiliary voltage inputs makes it suitable for complex power monitoring scenarios. The module supports high-frequency system operation at 50/60Hz, ensuring compatibility with global power standards. The General Electric UR8LH CT/VT Module delivers reliable performance even in demanding electrical conditions.

From a system integration perspective, the General Electric UR8LH CT/VT Module is designed for seamless installation within GE Multilin UR series relay racks. It supports flexible upgrades without requiring major hardware modifications, making it ideal for retrofit projects. Compared with earlier CT/VT input modules in the same series, the General Electric UR8LH CT/VT Module offers improved compatibility with newer firmware and enhanced processing capability. This makes it a preferred choice for modernized protection and control systems.

The UR8LH General Electric CT/VT Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
General Electric UR8LH CT/VT Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
General Electric UR8LH CT/VT Module Specs

General

  • Manufacturer GE / Bently Nevada
  • Model UR8LH
  • Condition New Original ready stock
  • Product Family UR9EH,UR7BH,UR8RH
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • System Integration: Seamlessly integrates with the GE Multilin Universal Relay (UR) series platform.
  • Signal Adaptation: Supports secondary signal input from standard current transformers (CTs) and voltage transformers (VTs).
  • Plug-in Universality: Adopts a modular hardware design, supporting flexible plug-and-play replacement within the same series of chassis.
  • Protocol Compatibility: Compatible with mainstream industrial communication protocols such as IEC 61850 and Modbus TCP/IP.
  • Parameter Tuning: Supports high-precision sampling frequency and transformation ratio configuration via EnerVista software.
  • Multi-channel Sampling: A single module typically provides a combination configuration of 4 current channels and 4 voltage channels.
  • Logic Association: Physical input signals can be directly associated with protection logic (control, measurement, and recording).
  • Firmware Synchronization: Supports online firmware upgrades, ensuring synchronization with the main control module's functional characteristics.
  • Power Substations: Used for high-precision real-time monitoring of voltage and current in transmission and distribution lines.
  • Generator Protection: Integrated into the protection system, used to monitor the electrical parameters of the stator and rotor.
  • Power Quality Analysis: Captures key data such as harmonics, voltage fluctuations, and frequency deviations.
  • Industrial Power Consumption Monitoring: Responsible for load management and fault recording in the power distribution systems of large industrial and mining enterprises.
Description
The General Electric UR8LH CT/VT Module is an essential input component within the GE Multilin UR series protection relay platform, specifically engineered for acquiring precise current and voltage measurements from power systems. The General Electric UR8LH CT/VT Module supports Phase CT inputs of 3–1A/5A and Ground CT inputs of 1–1A/5A, along with VT inputs of 3-phase plus 1 auxiliary channel rated at 50–240V. With a frequency range of 50/60Hz, it is suitable for standard industrial and utility power systems. The General Electric UR8LH CT/VT Module ensures accurate signal acquisition for protection, monitoring, and control applications.

The General Electric UR8LH CT/VT Module is designed with a 4 CT input and 4 VT input configuration, enabling full three-phase system monitoring with zero-sequence detection capability. It performs high-precision analog signal sampling through advanced A/D conversion technology, allowing accurate calculation of electrical parameters such as current, voltage, frequency, and phase angle. This makes the General Electric UR8LH CT/VT Module highly reliable for protective relay decision-making in critical power environments.

In terms of system integration, the General Electric UR8LH CT/VT Module is fully compatible with GE Multilin Universal Relay architecture and requires firmware version 4.0x or higher. It also depends on a matching CPU module to ensure proper operation and system stability. Compared with earlier CT/VT input modules in the UR series, the General Electric UR8LH CT/VT Module offers improved compatibility with newer firmware platforms and enhanced signal processing capability, making it more suitable for upgraded protection systems.

The General Electric UR8LH CT/VT Module also provides strong flexibility for system expansion and retrofit projects. It can be directly inserted into existing UR relay racks without modifying the overall system architecture, allowing easy upgrading of analog input capabilities. This modular design significantly reduces downtime during maintenance or upgrades. The General Electric UR8LH CT/VT Module is widely used in substations, industrial plants, and utility networks where reliable protection and accurate measurement are essential.
Alternative Names
UR8LA UR8JH UR8FH UR6CH UR8RH UR 8LH
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why does the General Electric UR8LH CT/VT Module require firmware version 4.0x or higher?
Because the module uses updated signal processing and communication protocols that are only supported in newer UR platform firmware. This ensures stable integration and full functional compatibility within the relay system.
How does the General Electric UR8LH CT/VT Module improve measurement accuracy?
It uses high-resolution A/D conversion technology to ensure precise sampling of current and voltage signals. This allows accurate calculation of electrical parameters such as phase angle, frequency, and amplitude.
What makes the General Electric UR8LH CT/VT Module suitable for three-phase systems?
Its 4 CT and 4 VT input configuration supports full three-phase plus auxiliary monitoring, including zero-sequence detection. This makes it suitable for complex power system protection applications.

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