The Reference Adjuster is capable of being interfaced with the above listed items and with the following

Basler system control devices:

• Minimum/Maximum Excitation Limiter (EL-200)

• Var/Power Factor Controller (SCP-250)

• Underfrequency/Overvoltage Module (UFOV-260)

The Reference Adjuster can be used for almost any application where rheostat or potentiometer output is

required.

1. For a rheostat output, match the ohmic output from the Style Chart (Figure 1) for the RA-70A

model.

2. For a potentiometer output, match the ohmic output from the Style Charts (Figures 2 and 3) for

the RA-70M or RA-70P models.

Style Charts

The complete model number of the Reference Adjuster is a combination of letters and numbers indicating

the features which are included. Figure 1 is the style chart for Reference Adjusters Having a Voltage

Regulator Interface. Figure 2 is the style chart for Reference Adjusters having a Manual Voltage Control

Interface. Figure 3 is the style chart for Reference Adjusters having a VAR/Power Factor Control

Interface. For example, a Reference Adjuster used with a Voltage Regulator may have a model number of

RA-70 A SC1R. This RA-70 would have the following features:

A) A voltage regulator interface is used

S) 24 Vdc is used for input power

C) The control input is 4 – 20 mA

1) The type of voltage regulator – SR-F, SR-E/H, SSE

R) Dual reference signals are output for twin AVRs