VR6 Voltage Regulator Caterpillar

Dimensions

Usage:

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Illustration 1	g00779068
Dimensions of the VR6 Voltage Regulator (A) 212.75 mm (8.376 inch) (B) 190.50 mm (7.500 inch) (C) 161.95 mm (6.376 inch) (D) 139.70 mm (5.500 inch) (E) 87.4 mm (3.441 inch)

Description of Terminals

Note: When the voltage regulator is used with a permanent magnet generator, ensure that the jumpers are removed between the following terminals: 20 - 28, 22 - 30 and 24 - 26. For regulators that were manufactured before June 2003, ensure that a jumper is installed between terminals 28 and "GND".

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Table 1
Number of the Terminal	Description
GND	Ground
2	Auxiliary input from VAR/PF Controller
3	Auxiliary input from VAR/PF Controller
4	This terminal is used in conjunction with terminal 7 for selecting internal voltage adjustment. Place the jumper between terminals 4 and 7 for using internal voltage adjustment. Remote voltage adjustment requires a remote voltage adjust potentiometer between terminals 6A and 7.
5	1 Ampere Current Transformer (CT)
5A	5 Ampere Current Transformer (CT)
6	Common for the Current Transformer
6A	Common connection for selectable features
7	This terminal is used in conjunction with terminal 4 for selecting external voltage adjustment. Place the jumper between terminals 4 and 7 for using internal voltage adjustment. Remote voltage adjustment requires a remote voltage adjust potentiometer between terminals 6A and 7.
8	Connect terminal 8 to terminal 6A in order to select a 1 V/Hz underfrequency slope.
9	Connect terminal 9 to terminal 6A in order to select three-phase sensing.
20	Sensing input on phase C
22	Sensing input on phase A
24	Sensing input on phase B
26	Three-phase power input
28	Single-phase power input or three-phase power input
30	Single-phase power input or three-phase power input
F1	Positive field lead
F2	Negative field lead

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NOTICE

Terminals 26, 28, and 30 are designed to be connected directly to a power source that is NOT switched. Either a permanent magnet or the generator's output is preferred so the voltage will gradually build. Connecting the terminals directly to a switched power source may cause damage to the regulator unless an inrush current reduction device is utilized.

Internal Adjustments

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Table 2
Adjustment	Description
"DRP"	Adjustment of the Voltage Droop
"FAC CAL"	This is the factory calibration of the voltage adjustment range. Adjustment by the customer is not required.
"VLT ADJ"	Voltage Adjustment
"UF"	Underfrequency Knee Adjustment
"STB"	Stability Adjustment