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Basler BE1-87T Transformer Differential Relay Transformer Differential Relay

BRAND : Basler

The BE1-87T Transformer Differential Relay is designed as primary protection for power transformers against internal faults. Available in either single- or three-phase configurations, this solid-state relay compares the currents entering and leaving the protected transformer. If any imbalance is detected that is not attributable to other (tested) factors, the relay provides a contact closure to isolate the power transformer to limit damage.


FEATURES

• Single- and three-phase configurations.

• Input isolation. •

Three-phase configuration includes internal phase shift compensation with zero-sequence current blocking. •

2nd- and 5th-harmonic restraint. • Adjustable through-current restraint.

• % IOP display.

• Tap scaling covers the range of 2.0 to 8.9 amperes in 0.1-ampere increments in 5 Ampere CT models, and 0.4 to 1.78 amperes in 0.02 ampere increments in 1 Ampere CT models.

• Low sensing burden.

• Maintains proper operation when tested for interference in accordance with IECC C37.90-1989, Trial-Use Standard Withstand Capability of Relay systems to Radiated electromagnetic Interference from Transceivers.

• UL listed (except for 250Vdc power supply).

• Five year warranty

Details

The BE1-87T Transformer Differential Relay is designed as primary protection for power transformers against internal faults. Available in either single- or three-phase configurations, this solid-state relay compares the currents entering and leaving the protected transformer. If any imbalance is detected that is not attributable to other (tested) factors, the relay provides a contact closure to isolate the power transformer to limit damage.


FEATURES

• Single- and three-phase configurations.

• Input isolation. •

Three-phase configuration includes internal phase shift compensation with zero-sequence current blocking. •

2nd- and 5th-harmonic restraint. • Adjustable through-current restraint.

• % IOP display.

• Tap scaling covers the range of 2.0 to 8.9 amperes in 0.1-ampere increments in 5 Ampere CT models, and 0.4 to 1.78 amperes in 0.02 ampere increments in 1 Ampere CT models.

• Low sensing burden.

• Maintains proper operation when tested for interference in accordance with IECC C37.90-1989, Trial-Use Standard Withstand Capability of Relay systems to Radiated electromagnetic Interference from Transceivers.

• UL listed (except for 250Vdc power supply).

• Five year warranty