Specifications

APPLICATION TABLE

Protected Zone

Purpose Relay Type Feeders Transmission Bus Transformers Generators Motors

Clear Current 50, 51, 67, 67N 50, 51 50, 51 51/27R, 51,

Faults 50/51B, 51/27C 50/51,

50/51M MPS

Differential 87B 87T 87G 87G

Breaker 50BF 50BF, BPR

Failure

Negative 46N 46N, 47N,

Sequence MPS

Relieve Excitation 24 24, 40Q, 40Q

Stress 60

Temperature MPS MPS

Voltage 27/59 59NC 27, 59, 59N 27,

27/59,

MPS

Restore Sync 25 25 25, 25A

Power Multiple 79M, 79M,

Shot 25/79TR 25/79TR

Reclose

Preserve Power 32R 32R, 32R,

System 32O/U 32O/U

Frequency 81O/U 81O/U

3 BE1 PROTECTIVE DEVICES

Basler Electric offers an extensive line of discrete solid-state protective devices designed to meet or exceed applicable IEEE and

IEC standards. Basler BE1 relays are available in standard semi-flush drawout cases similar in appearance, connections, and

mounting to electromechanical devices. Some units are available in standard 19" rack mount configurations. Most models

include built-in test plugs or other provisions for testing units in the case. Advanced digital and microprocessor circuits provide

precise measurement and timing accuracies. Complete specifications are found in specific product bulletins. For general

standards, dimensions, and accessories, refer to Basler product bulletin SDA.

Basler Electric protective relays are:

• Dependable – Basler protective relays are designed to provide dependable operation in harsh substation

environments. They are qualified by rigorous electrical and physical tests. The wide operating temperature

range of -40°C to +70°C is indicative of the high quality level of components used in all BE1 series relays.

• Secure – Using signal filtering techniques in all electronic hardware and software programs, Basler

protective relays are designed and qualified in the laboratory to make correct decisions while exposed to

the harsh environment common in high voltage substations.

• Flexible – A variety of standard features and options includes a wide range of sensing inputs, outputs, and

functional characteristics. Coupled with low burden designs, these options make it possible to tailor the

products to your needs.

• Adjustable – Direct reading switches, digital displays, and precision controls on the front panel provide

convenient and understandable adjustments.

• Available – Basler protective relays are American-made and are normally available for delivery within three

to four weeks from receipt of order.