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Instruction Manual Page 1
Instruction Manual
I n s t a l l a t i o n O p e r a t i o n M a i n t e n a n c e
Line Drop Compensator
514-01905-04
514-01906-04
514-01907-04

Kato Engineering Inc.
P.O. Box 8447
Mankato, MN USA
56002-8447
Tel: 507-625-4011
Fax: 507-345-2798
Email:
katoengineering@lsusa.com
www.kato-eng.com
Publication 351-07002-00, 06/21/05 Page 2
Note: Because of rapid changes in designs
and processes and the variability of Kato
Engineerings products, information in this
manual must not be regarded as binding
and is subject to change without notice.
Connections
See Figure 1.
Mounting
This unit can be mounted in any position. See Figure 2 for an outline
drawing
Operation
The line drop compensator provides constant voltage at the load for
applications with line loss of up to approximately 8%, depending upon
the type of voltage regulator. It does this by measuring the load at the
generator and sending a signal to the voltage regulator to in crease the
voltage output when voltage is lost in the line between the generator and
the load.
The current transformer supplies a signal that is proportional to the line
current. The recti er bridge converts this ac signal to dc, and it is added
to the sensing circuit of the voltage regulator The setting of the variable
resistors will determine the amount of line drop com pensation which is
delivered to the voltage regulator.
Adjustment
1. Turn line drop compensation control on the front of unit fully
counterclockwise. This control may be located external to the line
drop compensator.
2. Set no-load voltage at the generator to the desired voltage by use of
the voltage adjust rheostat.
3. Apply load; monitor the voltage at the load.
4. Turn the drop compensation control clockwise until voltage is the
same as that in step 2.

If proper adjustment cannot be obtained, check connections. Be sure
+ and - connections are not reversed.

If connections are correct and the unit still cannot reach proper
adjustments the problem is in the line drop compensator or the
current transformer supplying the line drop compensator.
Note: Line drop compensator will not
compensate for more than approximately
8% of line loss. Page 3
Maintenance
If parts, repair, or replacement are required, contact the Service
Department at Kato Engineering. Be sure to specify part number and
serial number. Table 1 and Table is a list of replacement parts.
Key Number
Description
Part Number
Quantity Required
T1, T2, T3
Transformer,
5 A to 0.5 A
858-25027-01
1 each
TB1
Terminal strip
531-14100-12
1
R1
External rheostat,
10 , 25 W
867-21075-23
1
None
Circuit board
assembly
509-00080-01
1
Key Number
Description
Part Number
Quantity Required
T1, T2, T3
Transformer,
5 A to 0.5 A
858-25027-03
1 each for 514-01907-04
T1 only for 514-01906-04
TB1
Terminal strip
531-30309-10
1
R1
External rheostat,
3 , 25 W
867-13075-23
1
None
Circuit board
assembly
509-00080-02
1
L1
Filter choke
859-48010-00
1
Table 1: Replacement parts for assembly 514-01905-04 (older model three-phase)

Table 2: Replacement parts for assembly 514-01906-04 and
514-01907-04 Page 4
Figure 1: Typical line connection (three phase)
To use the internal droop adjust, connect a jumper between
terminals 7 and 8 as shown in this drawing. To use remote
adjust, connect a 3 , 25 W rheostat between terminals 7
and - (minus) as shown by the dotted connection. Remove
the jumper between 7 and 8. The single-phase unit uses
terminals CT1A and CT1B. Page 5
Figure 2: Outline drawing Page 6
Figure 3: Single-phase electrical schematic (514-01906-04) Page 7
Figure 4: Three-phase electrical schematic (514-01907-04)