On single-phase sensing models, the voltage sensing leads are connected to terminals E1 and E3. For
three-phase sensing, terminals E1, E2 and E3 are used. For precise voltage regulation, the sensing leads
should be connected as close as possible to the point where regulation is desired.
SR6A and SR9A Voltage Regulators are factory preset for 120 Vac sensing voltage. If the sensing
voltage needs to be changed for your application, perform the following steps.
Step 1. Remove the cover if applicable.
Step 2. Remove nine hex screws.
Step 3. Remove the printed circuit board without disconnecting the wires.
Step 4. Locate transformer(s) T1 for single-phase sensing units (T1 and T2 for three-phase sensing
units). These transformers are equipped with Faston connectors for changing sensing taps.
Step 5. For single-phase sensing units, move the wire that is factory connected to T1-120 terminal to the
T1 terminal labeled with the desired sensing voltage.
Step 6. For three-phase sensing units, move the wire at terminal T1-120 to the T1 terminal labeled with
the desired sensing voltage. Also, move the wire from terminal T2-120 to the T2 terminal labeled
with the desired sensing voltage.
Figure 6. Top View of Voltage Regulator
The voltage applied to the sensing terminals of the regulator is regulated. Therefore, it cannot correct for
voltage drop in leads that may occur at points other than where the regulator sensing leads are
connected. The leads that supply regulator sensing should not be used to supply power to any other
equipment or to the regulator power stage (terminals 3 and 4).
If the generator will be operated in parallel with other generators, the phase relationship of sensing
voltage and the paralleling current transformer is very important. (See
Parallel Compensation
for further
information.)
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1-888-POWER-58
REQUEST A QUOTE
SHOP ONLINE
www.genpowerusa.com