24
F O R M
DVR
®
2400 and DVR
®
2500 Digital Voltage Regulator
Installation, Operation and Maintenance Manual
SB0056E
Revised
November 2018
Regal Beloit America, Inc.
100 East Randolph Street
Wausau, WI 54402-8003
www.regalbeloit.com/Brands/
Marathon-Generators
Quick Connect Terminals
Application
Notes
Terminal
Name
Description
GND
Chassis ground
Use #12 AWG (4 mm
2
) minimum conductor.
4
PMG/External power input – terminal 2
Protected by fuse.
3
PMG/External power input – terminal 1
Protected by fuse. 180-240Vac, 250-300Hz, 350VA
E1
Generator armature – terminal T1
Phase A for 3 phase output. L1 input for single phase.
E2
Generator armature – terminal T2
Phase B for 3 phase output. L2 input for single phase.
E3
Generator armature – terminal T3
Phase C for 3 phase output. Jumper to E2 for single phase.
Reserved
Reserved
F -
Exciter stator – terminal F1
Excitation output. Never apply a voltage to these terminals. Observe polarity.
F +
Exciter stator – terminal F2
Table 5-1. Quick Connect Terminals
Chassis Ground (GND)
The chassis ground terminal is labeled GND. Two chassis grounds are avail-
able on the regulator. GND closer to the P1 and P2 need to be terminated
to chassis as close to the regulator as possible.
Power Supply Inputs (3 and 4)
Power input terminals are labeled 3 and 4.
Generator Voltage Sensing Inputs (E1, E2 and E3)
The generator voltage sensing terminals are labeled E1, E2, and E3. A
single-phase sensing connection is obtained by connecting the phase C
sensing input to terminals E2 and E3.
Exciter Field Output (F+ and F-)
The field output terminals for connection to the generator exciter field are
labeled F+ and F-.
Single Phase Current Sensing Input (IB1 and IB2)
Generator line current is stepped down through a user-supplied CT on
Phase B. Secondary current (5A) from that transformer is applied to P1
connector terminals labeled IB1 and IB2. Consult current transformer in-
struction manuals for CT polarity identification and install per Figure 5-7.
See Figure 5-5 and Table 5-2 for terminal assignments.
Three Phase Current Sensing Input (2500 only)
Generator line current is stepped down through user-supplied CT’s. Sec-
ondary current (5A) from these transformers are applied to the P1 connec-
tor terminals labeled IB1 and IB2 and P2 connector terminals labeled IA1,
IA2 and IC1, IC2. Consult CT instruction manuals for polarity identification
and install per Figure 5-6. See Figure 5-5 and Table 5-2 for terminal as-
signments.
Note:
All transformers must have the same CT ratio.
