American SEL-587 microprocessor-based protection device differential relay
LEHIY item code: LH-SEL-0034
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The SEL-587 microprocessor-based differential relay (model number 0587006X131) is a genuine product sourced directly from the manufacturer. We offer remote or on-site installation and commissioning services for SEL devices.
The SEL-587 microprocessor-based differential/overcurrent relay provides protection for any dual-input device, such as transformers, motors, generators, and reactors. Apply it for differential and overcurrent protection and use event reporting for rapid post-event analysis.
The SEL-587 current differential relay protection device features: sensitive current differential protection with programmable single-slope or dual-slope percentage limits, monitored by second and fifth harmonic elements, providing safe differential protection for dual-winding devices. Choose from common or independent harmonic blocking or suppression.
Unrestricted differential elements provide rapid operation for high-intensity internal faults. Automatic calculation of relay tap settings simplifies application.
Individual winding overcurrent protection: Individual winding phase, residual, and negative sequence overcurrent elements, including instantaneous, timing, and inverse-time overcurrent elements, provide comprehensive overcurrent protection.
Protection and control logic: SELogic control equations with SELogic variables and timers benefit conventional or advanced protection schemes. Monitoring and reporting: Oscilloscope event reporting (up to ten 15-cycle reports) and metering functions eliminate or reduce external recorder and metering requirements.
Serial data communication: Communicates with ASCII terminals, local HMIs, SCADA, or DCS systems using a serial port. The SEL-587 comes standard with a front EIA-232 serial port. As an ordering option, select the rear EIA-232 or EIA-485 serial port.
Ports for SEL ASCII and interleaved SEL Fast binary messages or Modbus RTU Slave protocols can be selected and configured via settings. acSELerator QuickSet software offline development of relay settings, writing SELogic control equations, and analyzing post-fault event reports.
Our company offers a superior supply of SEL-587 microprocessor-based differential relays for protection devices from the USA. We source directly from the manufacturer, ensuring genuine SEL-587 integrated protection devices.
Product features include: Dual-winding differential protection – Provides programmable single-slope or dual-slope percentage limits allows current differential protection of dual-winding transformers, reactors, generators, large motors, and other two-terminal equipment. Automatic tap calculation simplifies setup.
Comprehensive overcurrent protection – Extends basic transformer protection by applying individual winding phase, residual, and negative-sequence overcurrent elements. Additionally, backup overcurrent protection uses SEL adaptive overcurrent elements, providing high-speed operation even under severe CT saturation.
Differential element monitoring – Monitors differential elements under transformer energized conditions using second and fourth harmonic blocking or constraint, as well as DC blocking. Calculated fifth harmonics can be used to monitor differential element operation during transformer overexcitation events.
For more details on SEL-587 protection devices, please contact our sales department.
Plain language sourcing guide for American SEL-587 microprocessor-based protection device differential relay
Start with the full model name. Check the brand name. Check the part number. Check the code on the old unit. These small checks help you avoid a wrong order.
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| Brand Name: | SEL | Certification: | ISO9001, CE |
|---|---|---|---|
| Place of Origin: | China | Condition: | New |
| Warranty: | 1 year | Customized sourcing: | available |
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American SEL-587 microprocessor-based protection device differential relay
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