GE UR8LA Multilin UR Series CT/VT Input Module
Manufacturer: GE Fanuc
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Part Number: UR8LA
Condition：New with Original Package
Product Type: CT/VT Input Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
GE UR8LA CT/VT Module
Configured for high-precision analog signal acquisition in power distribution systems, the GE UR8LA (UR8LA CT/VT Input Module) provides direct physical execution of current and voltage monitoring tasks within the Universal Relay (UR) platform.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | UR8LA |
| Brand | GE Multilin |
| Origin | Canada |
| Weight | 1.0 kg |
| Dimensions | 6 inch × 4 inch (Standard UR chassis size) |
| Operating Temp | -40 deg C to +70 deg C |
| Power Consumption | Dependent on UR chassis backplane supply |
| Input Channels | 8 CT channels, 4 VT channels |
| Accuracy Standard | IEC 60255 compliant |
Profinet / EtherNet/IP deterministic networks
The UR8LA module interfaces with the UR processor backplane to deliver high-fidelity signal sampling required for deterministic protection logic execution. By maintaining rigid firmware flash compatibility across the UR series, this module ensures consistent measurement performance during real-time load analysis. The internal bus communication velocity is optimized to handle the throughput of 12 simultaneous analog channels, preventing bottlenecks in high-speed trip path calculation. Galvanic isolation between input channels and the CPU backplane suppresses common-mode noise, maintaining signal integrity in high-interference electrical environments.
Frequently Asked Questions
Q: Can the UR8LA channels be reconfigured for different CT ratios via firmware?
A: CT ratios are managed through the relay's global configuration settings and associated protection logic. While the hardware provides raw analog data, the relay’s processor applies the scaling factors defined during the initial system setup.
Q: How does the module handle signal isolation if a transient spike occurs on the VT inputs?
A: The UR8LA incorporates galvanic isolation circuitry for each channel. This physical barrier prevents voltage surges on the VT secondary inputs from propagating to the sensitive CPU and backplane communication circuitry.
Field Installation Guidelines
- Module Insertion: Ensure the chassis is de-energized before sliding the UR8LA into the designated slot. Align the guide pins accurately to avoid bending the backplane pins, and secure the front panel screws to ensure a proper chassis ground connection.
- Wiring Standards: Terminate CT and VT secondary leads using appropriate ring lugs to ensure low-resistance contact. Verify that CT circuits are grounded at one point only to prevent circulating currents.
- Shielding: Use shielded, twisted-pair cabling for all incoming analog signals. Terminate the shield drain wire at the relay’s chassis ground stud to minimize electromagnetic interference (EMI) and common-mode noise.
- Maintenance: Regularly verify terminal screw torque after initial installation, as thermal cycling in substation environments may cause loosening. Ensure that the module front panel is kept clean to allow for unobstructed viewing of status LEDs.