Speed Bias Output
Make connections to synchronizer terminals as shown and connect the cable
shields to the control end only.
For single-unit 2301 application, use:
High impedance—terminal 20 (±) and 21 (common).
For 2301A, Load Sharing Modules (LSM), EPG, 2500 load control systems, and
EGA or EGM with external resistors, use:
Low impedance—terminal 22 (±) and 21 (common).
For EPG speed controls without load sensors, use:
SPM-A terminal 24 (±) to EPG terminal 10;
SPM-A terminal 23 (common) to EPG terminal 5.
Paralleling a Bus to a Bus
The synchronizer can be used to parallel an isolated bus to another bus, as
shown in Figure 2-2. Up to seven generators operating in parallel on an isolated
bus may be synchronized to another bus. In this case, the synchronizer's low
impedance output to the load sharing and speed control's SPM input is tied to
each control (through a resistor if the control is not normally connected to the low
impedance output). The resistor value is determined by the kind of control used
(refer to the table below). A resistor with a wattage rating between 1/4 and 1 watt
may be used. The resistor should be installed in the line from the synchronizer
output terminal designated ± (terminals 20, 22, or 24 depending on type of
control) and located close to the control to reduce noise pickup.
Type Control Acceptable Resistance
Value
Woodward Part
Number
2301 1.6 to 2.0 MΩ 1649-333
2500 Load Sensor No resistor required
EGA 196 to 226 kΩ 1649-605
EG Load Signal Control
or EGM 665 to 765 kΩ 1649-277
2301A No resistor required
Generator Load Sensor No resistor required
Sequentially Paralleling Generator to a Bus
Although the synchronizer can be switched to parallel generators in sequence to
a bus, Woodward Governor Company does not recommend this option.
