Name: Graham 1703 Series
Brand: Graham
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CAUTION

REDUCING THE INPUT VOLTAGEREDUCING THE INPUT VOLTAGE

REDUCING THE INPUT VOLTAGE

WILL REDUCE THE HORSEPOWERWILL REDUCE THE HORSEPOWER

WILL REDUCE THE HORSEPOWER

CAPABILITY OF THE DRIVE.CAPABILITY OF THE DRIVE.

CAPABILITY OF THE DRIVE.

Selecting different input and output voltages may

damage the drive or motor or both and will result in

improper operation of the system.

2.22.2

2.2

GROUND CONNECTIONSGROUND CONNECTIONS

GROUND CONNECTIONS

A yellow and green grounding terminal (4TB1) is pro-

vided for a dedicated ground wire connection. All pro-

visions of the National Electrical Code and local codes

must be followed.

WARNING

CONDUIT GROUND AND DAISYCONDUIT GROUND AND DAISY

CONDUIT GROUND AND DAISY

CHAIN GROUNDING ARE NOT AD-CHAIN GROUNDING ARE NOT AD-

CHAIN GROUNDING ARE NOT AD-

EQUATE. COLD WATER PIPE CON-EQUATE. COLD WATER PIPE CON-

EQUATE. COLD WATER PIPE CON-

NECTIONS ARE NOT ADEQUATE. ANECTIONS ARE NOT ADEQUATE. A

NECTIONS ARE NOT ADEQUATE. A

SEPARATE GROUNDING WIRESEPARATE GROUNDING WIRE

SEPARATE GROUNDING WIRE

MUST BE RUN TO AVOID POSSIBLEMUST BE RUN TO AVOID POSSIBLE

MUST BE RUN TO AVOID POSSIBLE

ELECTRICAL NOISE PROBLEMSELECTRICAL NOISE PROBLEMS

ELECTRICAL NOISE PROBLEMS

AND POTENTIAL SAFETY HAZARDS.AND POTENTIAL SAFETY HAZARDS.

AND POTENTIAL SAFETY HAZARDS.

2.32.3

2.3

INPUT DISCONNECT AND INPUTINPUT DISCONNECT AND INPUT

INPUT DISCONNECT AND INPUT

FUSESFUSES

FUSES

The drive may be supplied with or without an input

disconnect and input fuses. Size the input disconnect

and fuses to handle the Drive Input Current rating

shown in the table on page 9. Input fuses are not re-

quired to protect the drive. Special fast acting fuses

should not be used.

2.42.4

2.4

ISOLATION TRANSFORMERISOLATION TRANSFORMER

ISOLATION TRANSFORMER

If an isolation transformer is used, size it from the

table on page 9.

If an isolation transformer is used, the National Elec-

trical Code requires that an input disconnect must be

placed between the transformer secondary and the

drive input.

WARNING

TO AVOID DAMAGE TO THE DRIVE,TO AVOID DAMAGE TO THE DRIVE,

TO AVOID DAMAGE TO THE DRIVE,

DO NOT OPEN OR CLOSE ANY DIS-DO NOT OPEN OR CLOSE ANY DIS-

DO NOT OPEN OR CLOSE ANY DIS-

CONNECT ON THE PRIMARY SIDECONNECT ON THE PRIMARY SIDE

CONNECT ON THE PRIMARY SIDE

OF THE TRANSFORMER UNTIL AF-OF THE TRANSFORMER UNTIL AF-

OF THE TRANSFORMER UNTIL AF-

TER THE DISCONNECT ON THETER THE DISCONNECT ON THE

TER THE DISCONNECT ON THE

SECONDARY SIDE IS OPENED.SECONDARY SIDE IS OPENED.

SECONDARY SIDE IS OPENED.

SECTION 2.SECTION 2.

SECTION 2.

WIRINGWIRING

WIRING

2.1 INPUT VOLTAGE2.1 INPUT VOLTAGE

2.1 INPUT VOLTAGE

The drive can be setup to operate on a broad range of

voltages. It was factory set to operate on the voltage

shown on the nameplate. Check the drive nameplate

for the proper input and output voltages before wiring

the drive. If the input voltage shown on the nameplate

is different than the voltage available, the drive may

be changed by reconnecting the leads from the control

transformer as shown below.

CAUTION

CONTACT GRAHAM BEFORECONTACT GRAHAM BEFORE

CONTACT GRAHAM BEFORE

CHANGING THE INPUT VOLTAGECHANGING THE INPUT VOLTAGE

CHANGING THE INPUT VOLTAGE

CONNECTION.CONNECTION.

CONNECTION.

On drives rated 21 amps or less, the P, S, and N con-

nection taps are located either on the power board or

on the snubber board. On all drives above 21 amps,

the connection taps are on the snubber board.

H1 through H8 are the transformer taps. They are

color coded as shown below.

Transformer Wire

Line H1 H2 H3 H4 H5 H6 H7 H8

Voltage White Red OrangeYellowGreen Blue Purple Grey

200/208 P3 P1 N1 P4 P2 N2 N3 N4

230 P3 N1 P1 P4 N2 P2 N3 N4

380 P3 N1 S1 S2 N2 N3 N4 P1

415 P3 S2 N1 S1 P1 N2 N3 N4

460 P3 N1 S1 S2 N2 P1 N3 N4

575* P3 N1 S1 S2 N2 N3 P1 N4

*See warning below

WARNING

A DRIVE NAMEPLATED FORA DRIVE NAMEPLATED FOR

A DRIVE NAMEPLATED FOR

460VAC OR LESS MUST NOT BE460VAC OR LESS MUST NOT BE

460VAC OR LESS MUST NOT BE

RECONNECTED FOR 575VAC IN-RECONNECTED FOR 575VAC IN-

RECONNECTED FOR 575VAC IN-

PUT VOLTAGE. DAMAGE TO THEPUT VOLTAGE. DAMAGE TO THE

PUT VOLTAGE. DAMAGE TO THE

DRIVE POWER COMPONENTSDRIVE POWER COMPONENTS

DRIVE POWER COMPONENTS

CAN RESULT FROM IMPROPERCAN RESULT FROM IMPROPER

CAN RESULT FROM IMPROPER

VOLTAGE CONNECTIONS.VOLTAGE CONNECTIONS.

VOLTAGE CONNECTIONS.

A drive nameplated for 575 V AC may be reconnected

for any of the lower voltages. Some 575 V AC drives

rated 21 amps or less will have only the H1, H3, H4

and H7 connections. Connect these as shown in the

table above.

Brand	Graham
Model	1703 Series
Category	DC Drives
Language	English

Graham 1703 Series User Manual

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Graham 1703 Series Specifications