4-20
BE1-87T Installation
9171300990 Rev R
Single-Phase Units
Single-Phase Units with Option 1-0
Three Input-Disabling Jumpers are located on each Analog Board #1 as shown in Figure 4-20.
Single-Phase Units with Option 1-1
Three additional Input-Disabling Jumpers are also located on each Analog Board #1 as shown in Figure
4-21. J9 is a factory adjustment and is not intended to be changed in the field.
BE1-87T single-phase units are shipped with all inputs enabled.
Three-Phase Units
Three-Phase Units with Option 1-0
Three Input-Disabling jumpers are located on each Analog Board #1 as shown in Figure 4-20.
Three-Phase Units with Option 1-1
Three additional Input-Disabling jumpers are also located on each Analog Board #1 as shown in Figure
4-21. J9 is a factory adjustment and is not intended to be changed in the field.
For Three-Phase Units with Input Sensing Type E (two inputs per phase)
The jumpers shown in Figures 4-20 and 4-21 are shipped in the disabled position and no further
adjustment should ever be necessary.
For Three-Phase Units with Input Sensing Type G (three inputs per phase)
The jumpers shown in Figures 4-20 and 4-21 are shipped with Input 3 enabled, and Inputs 4 and 5
disabled. If only two inputs are actually used (which must be Inputs 1 and 2), it is important to disable the
unused input of each phase by means of the internal Input-Disabling jumpers provided on each of the
three Analog Boards #1 as shown in either Figure 4-20 or Figure 4-21. J9 in Figure 4-21 is a factory
adjustment and is not intended to be changed in the field.
SENSING CONNECTION DIAGRAMS
Each connection diagram provides, as an example, typical transformer terminal markings and voltage
diagrams that might be found on a transformer nameplate with the winding interconnections shown. The
designations for high side and low side windings are for illustrative purposes only. For example, a
diagram for a delta-wye transformer is applicable to a wye-delta transformer if the winding
interconnections are the same. The phase shifts shown in the voltage diagrams assume A-B-C Phase
sequence (rotation).
Each connection diagram shows the CT circuit safety ground located at the switch board panel terminal
block as recommended in ANSI Standard C57.13.3.
Single-Phase Input Sensing Connections
Typical single-phase input sensing connections are illustrated in Figure 4-22.
Single-phase units may also be used in three-phase configurations, one on each phase. Figure 4-23
through Figure 4-26 show several typical three-phase sensing examples using three BE1-87T single-
phase relays. Many other configurations are possible.
www
. ElectricalPartManuals
. com
