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protection circuits. In the on position, ground

fault trips will be automatically reset. This

function is for use by factory personnel utilizing

special testing procedures. This switch must be

off! In this position, power to the drive must be

cycled to reset the fault.

DO NOT SELECT THE ON POSI-DO NOT SELECT THE ON POSI-

DO NOT SELECT THE ON POSI-

TION OF THE EXTR SWITCH. DAM-TION OF THE EXTR SWITCH. DAM-

TION OF THE EXTR SWITCH. DAM-

AGE CAN OCCUR TO THE DRIVEAGE CAN OCCUR TO THE DRIVE

AGE CAN OCCUR TO THE DRIVE

AND/OR THE MOTOR IF AAND/OR THE MOTOR IF A

AND/OR THE MOTOR IF A

GROUND FAULT PROBLEM EX-GROUND FAULT PROBLEM EX-

GROUND FAULT PROBLEM EX-

ISTS AND THE CIRCUIT IS AUTO-ISTS AND THE CIRCUIT IS AUTO-

ISTS AND THE CIRCUIT IS AUTO-

MATICALLY RESETTING AND RE-MATICALLY RESETTING AND RE-

MATICALLY RESETTING AND RE-

STARTING WITH THIS CONDI-STARTING WITH THIS CONDI-

STARTING WITH THIS CONDI-

TION.TION.

TION.

7.2.27.2.2

7.2.2

OVR - OVR -

OVR - The

OVERVOLTAGE RESET OVERVOLTAGE RESET

OVERVOLTAGE RESET

switch selects whether the OV fault trip is auto-

matically reset (on position) or manually reset

(off position) by cycling power or by using the

optional front panel FAULT reset switch. To

prevent nuisance fault trips, this switch should

always be on, allowing automatic reset. See

Section 4.12.

7.2.37.2.3

7.2.3

UVR - UVR -

UVR - The

UNDERVOLTAGE RE- UNDERVOLTAGE RE-

UNDERVOLTAGE RE-

SETSET

SET switch selects whether the UV fault trip is

automatically reset (on position) or manually

reset (off position) by cycling power or by using

the front panel FAULT reset switch. See Sec-

tion 4.11.

7.2.47.2.4

7.2.4

OCR - OCR -

OCR - The

OVERCURRENT RESET OVERCURRENT RESET

OVERCURRENT RESET

switch selects whether the OC fault trip is auto-

matically reset (on position) or manually reset

(off position) using the optional front panel

FAULT reset switch. See Section 4.10.

7.2.57.2.5

7.2.5

PLR - PLR -

PLR - The

PHASE LOSS RESET PHASE LOSS RESET

PHASE LOSS RESET

switch selects whether the PL fault trip is auto-

matically reset (on position) or manually reset

(off position) by cycling power or by using the

optional front panel FAULT reset switch. See

Section 4.8.

7.2.67.2.6

7.2.6

HI-TORQUEHI-TORQUE

HI-TORQUE - The amount of motor

starting torque available from the drive is se-

lectable using this switch.

ONON

ON - Maximum torque is available for

starting the motor.

OFFOFF

OFF - Up to 80% of the drive’s rated

torque is available for starting the motor.

NOTE:NOTE:

NOTE:

THIS SWITCH SHOULD BE THIS SWITCH SHOULD BE

THIS SWITCH SHOULD BE

IN THE OFF POSITION UNLESSIN THE OFF POSITION UNLESS

IN THE OFF POSITION UNLESS

YOUR APPLICATION REQUIRESYOUR APPLICATION REQUIRES

YOUR APPLICATION REQUIRES

ADDITIONAL STARTING TORQUE.ADDITIONAL STARTING TORQUE.

ADDITIONAL STARTING TORQUE.

SEE SECTION 6.6 FOR CALIBRA-SEE SECTION 6.6 FOR CALIBRA-

SEE SECTION 6.6 FOR CALIBRA-

TION.TION.

TION.

7.2.77.2.7

7.2.7

EXT SPD - The EXTENDED SPEEDEXT SPD - The EXTENDED SPEED

EXT SPD - The EXTENDED SPEED

switch, used with the optional extended speed

potentiometer, determines the maximum out-

put frequency the drive is capable of achieving.

ONON

ON - Frequency calibration up to 120 Hz

(constant HP mode available above 60

Hz) in the REMOTE mode only. The ex-

tended speed circuit will not function in

the LOCAL mode from the control

panel.

OFFOFF

OFF - Frequency calibration up to 60 Hz

(normally calibrated for 60 Hz operation

unless otherwise specified).

NOTE:NOTE:

NOTE:

THE MAX SPEED POTEN- THE MAX SPEED POTEN-

THE MAX SPEED POTEN-

TIOMETER (SECTION 6.1) SHOULDTIOMETER (SECTION 6.1) SHOULD

TIOMETER (SECTION 6.1) SHOULD

BE SET FOR 100% SPEED (60 HZ)BE SET FOR 100% SPEED (60 HZ)

BE SET FOR 100% SPEED (60 HZ)

WHEN A FULL SPEED COMMANDWHEN A FULL SPEED COMMAND

WHEN A FULL SPEED COMMAND

IS GIVEN BEFORE ACTIVATINGIS GIVEN BEFORE ACTIVATING

IS GIVEN BEFORE ACTIVATING

THE EXT SPD SWITCH TOTHE EXT SPD SWITCH TO

THE EXT SPD SWITCH TO

ACHIEVE SPEEDS HIGHER THANACHIEVE SPEEDS HIGHER THAN

ACHIEVE SPEEDS HIGHER THAN

60 HZ. SEE SECTION 6.3.60 HZ. SEE SECTION 6.3.

60 HZ. SEE SECTION 6.3.

OPERATING THE MOTOR AND ITSOPERATING THE MOTOR AND ITS

OPERATING THE MOTOR AND ITS

DRIVEN APPLICATION ATDRIVEN APPLICATION AT

DRIVEN APPLICATION AT

SPEEDS ABOVE THE MOTORSPEEDS ABOVE THE MOTOR

SPEEDS ABOVE THE MOTOR

NAMEPLATE RPM CAN CAUSENAMEPLATE RPM CAN CAUSE

NAMEPLATE RPM CAN CAUSE

DAMAGE TO THE DRIVEN EQUIP-DAMAGE TO THE DRIVEN EQUIP-

DAMAGE TO THE DRIVEN EQUIP-

MENT OR THE APPLICATION RE-MENT OR THE APPLICATION RE-

MENT OR THE APPLICATION RE-

LATED COMPONENTS. DO NOTLATED COMPONENTS. DO NOT

LATED COMPONENTS. DO NOT

OPERATE IN THE EXT SPD MODEOPERATE IN THE EXT SPD MODE

OPERATE IN THE EXT SPD MODE

WITHOUT PRIOR VERIFICATIONWITHOUT PRIOR VERIFICATION

WITHOUT PRIOR VERIFICATION

THAT YOUR SYSTEM AND EQUIP-THAT YOUR SYSTEM AND EQUIP-

THAT YOUR SYSTEM AND EQUIP-

MENT CAN WITHSTAND THEMENT CAN WITHSTAND THE

MENT CAN WITHSTAND THE

ADDED CAPACITY CAUSED BY IN-ADDED CAPACITY CAUSED BY IN-

ADDED CAPACITY CAUSED BY IN-

CREASING THE MOTOR RPMCREASING THE MOTOR RPM

CREASING THE MOTOR RPM

ABOVE BASE SPEED.ABOVE BASE SPEED.

ABOVE BASE SPEED.

7.2.87.2.8

7.2.8

4-20 mA4-20 mA

4-20 mA - This switch selects the type

of input speed reference signal to be followed

(DC voltage or current). See Sections 3.1.2, 6.1,

and 6.2.

ONON

ON - Current input signals between

zero and 40 mA can be tracked (typically

4 to 20 mA).

Brand	Graham
Model	1703 Series
Category	DC Drives
Language	English

Graham 1703 Series User Manual

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Questions and Answers:

Graham 1703 Series Specifications