SELSEL-T401L Ultra-High-Speed Line Relay

• Apply ultra-high-speed protection based on field-proven SEL
time-domain technology with demonstrated trip times on the order
of 1–5 ms.

SEL SEL-T400L Time-Domain Line Protection

The SEL-T400L is a state-of-the-art time-domain line protective relay operating within a few milliseconds for a wide
range of fault and system conditions. Available in both 5 A and 1 A models, the SEL-T400L incorporates fault locating
with accuracy typically within one tower span. With only a handful of settings and preconfigured protection logic, the
SEL-T400L is simple to apply, yet it supports a variety of applications and protection philosophies.

SEL SEL-2664S Stator Ground Protection Relay

• Provide 100 percent stator ground protection with a combination
of signal injection and neutral overvoltage elements.

SEL SEL-787-2/-3/-4 Transformer Protection Relay

LEA inputs support installations with low-energy voltage sensors,
Rogowski coils, and low-power current transformers (LPCTs)

SEL SEL-787 Transformer Protection Relay

The SEL-787 Transformer Protection Relay provides unsurpassed protection, integration, and control features in a
flexible, compact, and cost-effective package.

SEL SEL-751 Feeder Protection Relay

Comprehensive Feeder Protection and
Control With Arc-Flash Detection
Added the option to add as many as 4 I/O modules, each with 21 programmable inputs or 12 electromechanical

SEL SEL-700G Generator Protection Relay

• Provide primary and backup generator protection with current,

voltage, frequency, distance, power, and out-of-step elements.

• Achieve 100 percent stator ground protection with full winding

SEL-487E Transformer Protection Relay

• Minimize damage and limit expensive repairs to transformers with
advanced differential protection and three restricted earth fault
(REF) elements.

SEL-400G Advanced Generator Protection System

The SEL-400G Advanced Generator Protection System offers unsurpassed protection, integration, control, and monitor
ing features for all types of generators including hydro, pumped-storage hydro, large steam turbines, and combustion gas
turbines (CGTs).

SEL SEL-387E Current Differential and Voltage Relay

Apply the SEL-387E Current Differential and Voltage Relay to provide comprehensive

protection, metering, and automation of transformers, reactors, and other power apparatus

SEL SEL-387A Current Differential and Overcurrent Relay

SEL SEL-387A Current Differential and Overcurrent Relay

SEL SEL-387 Current Differential and Overcurrent Relay

SEL SEL-387 Current Differential and Overcurrent Relay

SEL SEL-300G Generator Relay

SEL SEL-300G Generator Relay