Basler Electric BE1-81O/U T3ED1JB7N0F Digital Frequency Relay

The BE1-32R Directional Overpower Relay and the BE1-32O/U Directional

Over/Underpower Relay are solid-state devices which provide versatility

and control in protecting machines against reverse power flow,

underpower and overpower conditions.

The BE1-32 relays (R and O/U) are typically used in

applications where excessive power flow in the tripping

direction is indicative of undesirable situations. Typical

examples are discussed below. Notice: This product is

not recommended for power factors below 0.10. Contact

Basler Electric for recommended products.

The BE1-32R Directional Overpower Relay and the BE1

32 O/U, Directional Over/Underpower Relays sense real

power flow (El cos Θ). These relays are solid-state

devices designed for use in single-phase or three-phase

systems to provide equipment protection for overpower

and/or underpower or to be used for supervisory control

of circuits. Both relay configurations may be used to

monitor either forward or reverse power. In the following

application examples, single-phase connections are

shown for simplicity.

The BE3-25 series are synchronizing check relays, also known

as paralleling relays. They are used to ensure that two AC

supplies are synchronized. For a system to be synchronized,

the frequency, phase angle, and voltage must be within preset

limits. The BE3-25-****4 can monitor either utility mains bus

bar and incoming generator, or two generators. 

The BE3-25-****4 offers user adjustment of the reset voltage

from 10 to 30%. This voltage corresponds to 6 to 20 electrical

degrees. The unit compares the input voltage and phase

relationship of the bus bar to that of the generator.

When the signal is within the preset limits, the relay energizes.

The BE3-25-****5 operates as the BE3 25-****4.

but has the additional feature of a dead bus facility.

This enables the relay to energize with a generator supply

only, which is a common requirement when utility mains failure

occurs.