Toshiba VT130G1 User Manual

TOSHIBA

INSTRUCTION

AND

MAINTENANCE

MANUAL

IMVT130Q1460

VT130G1 TRANSISTOR INVERTER

1.5 TO 33KVA (1 to 30 hp)

460 VOLT

3 PHASE

TOSMIBA/HOUSTON

INTERNATIONAL CORPORATION MAY 89 KR

13131 West Little York Road

Houston, Texas 77041

PREFACE

This instruction manual is concerned with installation, operation, and troubleshooting procedures for the Toshiba VT 130Q1 general purpose inverter. The 460V model VT130G1 is a sinusoidal wave, pulse width modulated (P.W.M.), controlled voltage

inverter with sizes available from 1 to 30 horsepower.

The 460V VT130G1 may be combined with a general purpose induction motor to con stitute a reliable variable speed drive system. A few of the advantages are: easy opera

tion, automatic control capability, reversing, high efficiency, and energy savings. Before using your VT130G1, carefully read this manual and observe all precautions to ensure long trouble free service of your inverter.

The main body of this manual covers the Toshiba power unit only. This is a wall

mounted NEMA I unit which will drive an A.C. motor at variable speeds. It does not include recommended peripheral equipment such as, input circuit breaker, input con

tactor, motor overload relay, etc. For standard built-up package units with peripheral

equipment, please refer to Addendum No. 1.

Ill

CONTENTS

SECTION

3 4

10 11

13 14 15

16 17

PAGE

INITIAL IN8PECTI0N/ST0RAQE

STANDARD SPECIFICATIONS..............................................................2

PRINCIPLES OP 0PERATI0N/APPUCATI0NS...0....................................5

INSTALLATION...................................................................................11

WIRING...............................................................................................12

Wiring Cautions....................................................................................12

Standard Connection Diagrams

Inverter Application and Buildup Chart

Genera) Requirements and Procedures..................................................18

Adjustment Procedures

Location of Terminals, Adjusting Resistors and Freq/Fautt

Display on the Printed Circuit Boards...........................................24

OPERATION AND CONNECTION EXAMPLES......................................25

Connection of Remote Speed Reference Signals.....................................25

Connection of Remote Frequency Meter and Ammeter Connections of Run Signals

Switching between Commercial Power Source and

and Inverter Output ...................................................................29

Parallel Motor Operation........................................................................29

Using Brake with Motor Additional Motor Operation

Switching Method between Motors.........................................................30

Replacing VF-PACK-S orTOSVERT 130G with

TOSVERT-130Q1.....................................................................30

OPERATION

Pre-operation Check Off....................................................................... 31

Pre-operation Adjustments....................................................................31

Operation Procedure.............................................................................31

Frequency and Fault Indicator................................................................33

ADJUSTMENTS

OPTIONS

MAINTENANCE..................................................................................51

FAULT DETECTION AND REPAIR

TROUBLESHOOTING................................................-

PARTS REPLACEMENT AND PRECAUTIONS

SPARE PARTS.................................................................................. 63

OUTLINE VIEW ................................................................................. 85

Inverter Units...................................................................................... 65

Cover Removal and Reinforcement Bar

PERIPHERAL DEVICES OUTLINE.......................................................69

BASIC SCHEMATICS

....................................................................................... 31

Deleted 4-21-88

...................................................................

Deleted 4-21-88

................................................................

.........................................................................30

....

..............................................................See 18 • 24

...............................................................

.........................................................................

...........

.............................................................

...............................................................

....................................................................

................................................. 1

....................................................

16 - 24

............................

35-38

Consult Factory

39-50

.....................................................

........................

............

..................................................

.......................

13 16

55 59

Section 1 INITIAL INSPECTION

Upon receipt of your VT130Q1, a careful Inspection for shipping damage should be made. After uncrating, check:

1. Whether there are any parts which might be ioose, broken or separated.

2. Whether the rated capacity shown on the nameplate is the same as specified on your order.

Periodically check the operating inverter for cleanlines?. Keep the cooling heatsink free of debris. Check connections (with power off) for tightness. Proper maintenance and operation will allow the inverter to give long troublefree service.

Storage

If the inverter is stored, it should be kept in a clean dry location free of temperature extremes. Storage for longer than six months without power requires reconditioning of

the filter capacitor:

1. Apply bus voltage for a few seconds and check capacitor temperatures.

WARNING

Be sure charge light Is out before touching any component.

2. Repeat Step 1 several times monitoring capacitor temperatures, if a capacitor gets warm, allow It to cool before repeating.

3. Capacitors are reconditioned when a constant bus voltage causes no heating.

Section 2 STANDARD SPECIFICATIONS

Tha standard apaciflcatlons art shown In Tabts 1. If thtra ara any apacfal spacifica* tions with your ordar, thay will ba dascribad saparataly.

TABLE 1 STANOARO SPECIFICATIONS (01 SERIES)

Model

and

PitinQI

Power

Supp^

Control

Sptcifi*

etbone

AppiieaWe Moto/

(HP) MAX.

Model (VTi »01 • ■ 4015-

Weight (pobnde) 15 18 18 20

Order i oa»40

Capacity (KVA)

naied Currtm (A)

Max. Motor KW (4 Pole)

voitaoe Prequency 3.phaae, 460v, eo hz

Allowable variation

Octroi xyfiem

Output voltage

Frequency aecureey

Voitase/Frequeney ratio

2 3 5

4025- -4035- -A055 .Atto 4110

01.10

1.5 2.5 3.5

2.5

0.76 1.5 2.2

Votlaga ±10H frequency 22HZ

Sinusoidal wave PWM control

O^phaae. 450V (maximum)

d:0.5H of higheet frequency (at 2S*C ±10*C)

56 to 60 HZ: V/F eonttam

60 to 10 HZ: V constant

02*10

3.7

03-10

7.6

33 35.5

05-10 07-10

5.5 5

8 11

3.7

5.5 7.5

10 16

■4150- 4^

10-10

15-10

15 22 30

11 15

20 25 »

4270

-4330

20-10 25-10 30-10

38 45

18.5

105

Operaiino

Punetion

Overload capacity

Speed Reference

Acceleration/ Deceleration Tima

irtking

Starting

Forward, reverae

Upper end lower apeed lìmiti

150H tor 50 aeeondi; ilOW eominuout

0 to 12 VDC or 4 to 20mA

1 to 20 aeeondi (acceleration and tfeeaieration individuaity adfuatabia)

By capadter charge

By dry contact (hold)

Reverting can be added ueing a dry contact or «witch

Upper and lower speed aettlng ilmlta art ad)utiabi«

Section 2

Protecting

Functione

Ambient

Condition«

Protection

Fault detection

Display

Location irvdoor NSMA 1 Cndoaura.

Ambient Temperature 0 to 40*c

Aelative Humidity Lea» than 90H, non condanaing

Vibration

StM preventk>rv overcurreni protection, abortdrcuit protection, overvoltaoe protection, undervottage protection, momentary power feiture protection, artd

input tuaa protection.

Fautt relay form^ contacts (250 VAC 1A ratiativa). The relay wW tngage whan evereurrent, ahorteircuit. overvoltage, or urtdervontge it detected. (Reset menueHy or remote vie e 1A contact)

•CHQ. LEO to indicate charge on but.

-3 digit, 7 eegment digital diaplay.

OC indicatea overcurreni OP indicatea ovenroitage UP irtdicatea undarvoitage OH indieacaa ovtrtamperaiure

Laaa than 0.5 0

Conetruction

Cooling

Inetrumente inettued on cover

NEMA Typa 1

Forced Air (IS HP and abovt only)

Di(^ (reguaney metar, apaad aattir>g potantiomatar

(3 K ohma,03Wl. RUN^STOP ewlieh.

Section 3 PRINCIPLES OF OPERATION/APPLICATIONS

Most A.C. induction motors in the past have been limited to fixed speeds. The Toshiba motor drive provides a simulated (RW.M.) A.C. that varies the speed of the motor. Toshiba’s giant transistor (G-TR) is used with a microprocessor corttrolled regulator to accomplish the conversion.

Motor speed ratings usually show the motor base speed at 60 HZ operation. Slower speeds (below base speed) are produced by reducing both the voltage and the fre> quency of the output.

H MOTOR

Figure 3-1 shows the voltage vary ing with the frequency until base speed (60 HZ) is reached. Above base speed, the voltage remains constant.

VOLTAQE

P.W.M. (Pulse Width Modulated) inverters change the incoming power to D.C. and then pulse the D.C. into the motor leads to simulate A.C. Figu'e 3-2 shows a representation of the Toshiba output voltage waveform.

An A.C. waveform is super

imposed on the pulse wave

for illustration.

FIGURE 3-2

Section 3

Figure 3*3 is divided into three parts; the MAIN CIRCUIT which handles the input and output power, the REGULATOR BOARD which senses input information to direct the power transistors (GTR), and the optional REGENERATIVE POWER DISCHARGE UNIT (D.B. unit).

Figure 3-3 shows a block diagram of the VT130G1 schematic.

oacmM<ot umt I

WPUTAC

STW/STMT

FIGURE 3-3

seo-Tii

wool

ttRUe: tfe. X'

Section 3

A. Main Circuit

HCT

OUT^

MOTOR

FIGURE 3^

Incoming 3 phase A.C. line voltage is rectified to a 650V D.C. bus by the diodes in the full wave rectifier.

Input line fuses Drotect the main circuit from fault currents. (7.5 HP and above) V\/hen the input is first energized, contactors MS1 working with resistor R1, pro

vide a slow charge to filtering capacitors Cl. A red LED (light emitting diode) on the base drive board turns on to indicate voltage on the bus.

A Hall-Effect D.C. current transformer (HCT) monitors bus current for the

regulator board. Output to the motor is obtained by switching the D.C. bus with the transistor

(GTR) inverter. G-TR control comes from the regulator board through the base amplifiers.

Pulse width is decreased for lower RMS voltage and increased for higher voltage. Lower frequencies have a greater number of pulses in one cycle. As

the frequency increases, the microprocessor selects the optimum number of pulses per waveform.

Switching of the transistors is controlled by the regulator board.

Section 3

Output waveforms are illustrated in Figure

Output

u-v

v-w

w • u

FIGURE 3-5

Proper 120^ phase shift between output leads stays constant over the entire frequency

range. Typical motor voltage and current at 60 hertz (full load) is shown on Figure 3*6. Note that although the voltage is in pulses, the current waveform is near sinusoidal. Voltage s leading current, typical in induction motors.

OUTPUT VOLTAGE AND CURRENT

VOLTS

CURRENT

FIGURE 3*6

Section 3

B. Regulator Board

Wiring diagrams at the end of this manual show a block diagram of regulator board functions and adjustments.

The regulator board accepts operator information and outputs base signals to control the Q-TR's. Refer to the wiring diagrams pages 14 and 15 for the following descriptions.

The operator speed pot. (frequency setting signal) is connected to CRF. REF. and OV. 0 to 12V DC at REF controls full range output of the inverter.

A 4 to 20mA signal can be connected at IRF and OV. A contact opening the CRF wire of the speed pot. will automatically switch to this current reference. The cover mounted speed pot. comes standard with this switch.

ST (start). F (forward), and R (reverse) connected to COM controls the start/stop func

tion and direction of inverter output.

Fault relay (contacts at FLA, FLB, and FLC) latches on if a fault occurs. Pressing the reset button or remotely resetting will reset the relay. (Remote reset use term. RST to COM)

A low speed relay may be used to detect inverter speed below as HZ. (option)

Factory adjustment provides 0.5 to 80 HZ operation. Moving jumper J3 from the 60 HZ to the 50 HZ position automatically changes maximum output to 67 HZ. Fre

quency range is adjustable from 0.5 HZ to 80 HZ with 1F jumpered at J2. Jumping 2F

at J2 raises output frequency to 160 HZ and 4F at J2 raises output frequency to 320 HZ. Note that adjustments or changes in output frequency may require readjustment of remote frequency meter and V/HZ.

The current detector monitors bus current from the HCT. If bus current rises to 163%, stall prevention circuitry phases back both voltage and frequency until the current decreases. 190% current shuts the Q-TR base drive off until current decreases. 240% current turns base drive off and latches the fault relay and OC overcurrent display.

Bus voltage is monitored on the base drive board. Fast deceleration rates can cause

the bus voltage to rise when absorbing energy from the motor. If the bus voltage rises to 750V (650V normal], deceleration time is lengthened regardless of setting. At Boov,

the inverter shuts down to protect filter capacitors C1 and Q-TRs from damage and latches fault relay and OV display.

The microprocessor (CPU) develops base signals which are isolated and amplified by the base driver circuit. Transformer T1 provides isolated low voltage A.C. which is rec tified and filtered for the base driver amplifiers.

Section 3

Applications

VTISOGI provides a high quality output voltage and current, but it is not a perfect sine wave. Therefore some increase in motor temperature, noise, and vibration may be noticed.

Special considerations must be taken when applying an inverter to an existing motor. At slower speeds, cooling is not effective due to reduced fan RPM. FULL LOAD torque at slow speeds may damage the motor due to overheating. In situations where the toad requires high torque at slow speeds, the motor may require replacement with a large frame size for heat dissipation.

Figure 3-7 shows a curve plotting acceptable torque vs. speed.

Note that for a safety margin, the torque curve shows no more than 90% motor rated torque at any speed. If torque requirements at slow speeds continuously exceed levels shown in Figure 3-7, a larger motor can be substituted.

Fixed speed machinery may not run properly at available speed ranges. Operation above 60 HZ may damage bearings or rotating parts. Slow speeds may provide insufficient lubrica tion on oil filled gear boxes or speed reducers. Manufacturer specifications may need to

be consulted.

H MOTOR

FIGURE 3-7

The above precautions should be looked at carefully to prevent any problems. It is most often the case, however, that the motor or motors on a variable speed application can be directly applied to the VT130G1.

Section 4

INSTALLATION

(INVERTER MUST BE INSTALLED IN VERTICAL POSITION)

1. The ambient temperature must be between —10**C and AO^C (18 to 104 degrees

Farenheit). If the inverter is installed inside a self-contained panel or a large con

trol panel, there must be proper ventilation to keep the temperature between

-10*0 and40*C.

2. If the ambient temperature exceeds 40*0, it is necessary to remove the upper and tower covers and the front cover. (When the inverter is installed inside an in dependent panel or a control panel, remove the covers for adequate ventilation.) This will improve ventilation and allow the ambient temperature rise up to 50*0, (122*F), However, this reduces the strength of the side panel and therefore, the operation panel should be left in place. (In lieu of the standard operation panel a

reinforcement bar can be used.)

Refer to page 70 for cover removal and reinforcement bar installation.

3. it is necessary for proper inverter operation to avoid high temperatures, humidity, dust, or metal particles.

4. Corrosive gas and/or liquids must be avoided.

5. Install in an area where there is no vibration or noise from other electrical equip

ment and where maintenance can be performed easily.

10 cm

or moro

//////

rT^rrTTTTrr

InsUtffing

FIGURE 4-1

Section 5

WIRING

Refer to Figures 5-1 and 5*2, Standard Connection Diagram, Table 2, Standard Wire Size, and Table 3, Inverter Rating Chart and use the following instructions. When wiring the unit, the front cover of the inverter must be removed. The method of front cover removal is shown on page 68.

1. Be careful not to apply commercial voltage to output terminals (U, V, or W). This will damage the unit.

2. A surge suppressor must be connected across the excitation coil of the electro magnetic contactor (MC) when used. Recommended surge suppressor: MARCON Electronics DCR-10A25 (or RC type, .luf, 400V, 5000, V4W).

3. Grounding wire size at terminal E must be 3.5 mm2 or greater (#10 gauge).

4. Match the power supply voltage to the control power input terminals.

5. Use shielded, twisted wires for external connections of speed reference signals

(CRF, REF, IRF, OV) and also remote meter signals (FM. CM, OV).

6. Use a DC 1 mA meter for frequency and current meter. A 20 K ohms variable

resistor is needed for the ammeter scale calibration.

7. Connect either F (forward) or R (reverse) terminal to ST terminal through the RUN/STOP switch. If there are two input signals from both F and R, F (forward)

command will override the reverse. The DRIVE-SW (RUN-STOP) on the operation panel is connected to F (forward), therefore to perform reverse operation without switching, two of the output terminal connections (U. V. and VV) must be inter changed. if F (fonward) or R (reverse) is to be controlled externally, switch the

DRIVE-SW lead on the operation panel between F (tonward) and R (reverse).

8. When the standard integral operation panel is included and also a remote operators station is to be used, the frequency reference signals from the integral operation panel and the remote operation panel cannot be used at the same time. In such case, disconnect the operation panel controls, or install a local/remote switch.

9. The 4 to 20 mA current input signal is not isolated in the inverter control circuit. Toshiba recommends that signal common not be grounded since noise problems may result.

10. CAUTION:

if auzillary contacts of the Main Contactor are not used, an external jumper must be installed between EC1 and EC2, connect control power to the secondary of the input contactor MC. Lost of input power will cause the FREQ/Fault display to go blank. Do Not install a jumper between ST and COM on power units 7.5HP and above. This will permanent!/ damage soft charge circuitry if EC1 and EC2 have not been wired in accordance with the Instruction Manual.

Section 5

G1 SERIES

(1) Rtmoit Fr«qu*ncy Mt(tr (2) Maximum capacity it 30VA. Only one

contactor for S.S KVA toad can bt connaetad to tarminal Ftii.S and nt.S

PIQURE 5>1 1.5**S.5KVA Standard Connection Diagram

Q1 SERIES

INPUT POWER

460 V

Section 5

R*9«n0r«ttd Powsr

Discharg« Unit

P2*'' OPTION

QRO

NOTES

(1) Remote Frequency Meter

(2) Maximum capacity it 30VA

^CM ACC DEC UL LL

j NOTE: ITEMS IN BOX SUPPLIED

-6e by TOSHIBA. ITEMS OUTSlOE BOX | SUPPLIED BY CUSTOMER UNLESS

I ORDERED FROM TOSHIBA i3o^

NOTE- Use STi to COM for customer intertocK or install jumper.

MS^: STARTING

COMMAND

FIGURE 5-2 8*33KVA Standard Connection Diagram

Section 5

TABLE 2 STANDARD WtRE SIZE (mm>)

MO^I

VTl90Ql-40ia

-4028

-4038

-4065

-40t0 (3.8) #10

«4110

-4180

-4220

-4270

-4330

Invortor

Modol

VT13OO1-4018

-4028

-4035

-4085 S8/S

-4080 8/7.8

-4110

-4180

-4220 82/20

-4270

-4330 33/30 22

Mtin ^owtr

input tno Output to

Moiof

(2.0)

(8.8) #8

(•) «

(14) #6

Control Powof

tuppfy

AC440/480V

{2-0)#14

Spood Aotoronoo,

Froqutney Motor.

Ammotor

Throo cero

(«pood roiorofteo)

Two ooro

(motor«)

O.OmrM or moro

#20

TABLE 3 - INVERTER RATING AND SWITCH GEAR CHART

AppKcobI«

Motor

MoM Od

CireuK Sroikor

(MCCB)

C«p«eHy Output Moott Mcd«< Modoi

KVA/HP

1.8/1 0.78

2.8/2 38/3

(KW)

MCP

1.8

OSSIP

2.2

3.7 ft<ao6'6.6

MCA

03180ft

88 11/10 7.3 16/18 11

MC*

■-13300ft

18 . ..MCA . 27/28

11.8

33460ft

MCft33lOOOn

Eloctro*

Mignotte

Contoetor

(Mq

OmnoAd

ft«(«y Th.fty

No. NO.

ft*aos-t.o

n>20S-36

c-2oe

n<20S-4.2

fl-20C-il

C<28E ft-388-18

n'38l-22

--A-38E-U ft-sse-ss

C-50E

ft*88fi-43

Otnor Sipntl

DrevHo

#18

(0.78)

AUX fttt«y (ftun)

Modli

Section 5

REQ UI REM ENTS/START-U P/ADJ USTM ENTS

Requirements

Unless supplied in a special optional enclosure, the ESPlSOGt should be installed in г area where:

1. Cabinet mounting is upright, leaving room for door clearance.

2. Ambient atmosphere is free of dust, corrosive gases, high moisture content and temperature extremes.

3. Vibration is kept to a minimum.

4. Unit should be easily accessible tor maintenance and troubleshooting.

Procedures

Each ESP130G1 is shipped with wiring diagrams that show necessary interconnections,

standard unit with operator controls in the door, simply requires connecting input power

and output to the motor. A remote operator station and other options require more interconnections.

Terminal numbers in the standard units are shown clearly in wiring diagrams. Terminal

strips are mounted at a convenient angle for easy access. Read the following precautions before installing the inverter:

1. Signal wires, (speed pots, meters. 4 to 20 mA) should be twisted conductors and ruf in separate conduit.

2. The inverter enclosure should be grounded to conform with electrical codes.

3. Noise suppressors should be attached to the coils of all relays and contactors that are added to the enclosure. RC type, Electro Cube #RG 1983*8-12 or varistor type #GE-V250PA40C (230V coil), #GE-V150PA20A (115V coil).

Prepower Checks

Before energizing power, check the following:

1. For any wiring errors or grounds.

2. Source voltage to ensure rated input voltage.

Section 5

Initial Operation

1. Initial conditions before power up: a) Frequency pot. (speed adjustment) should be at minimum setting.

b) Fdrward/Reverse switch (if used) in forward position.

2. Energizing the input terminals will charge the DC bus in the power unit and the charge LED will come on.

3. Run the inverter without connecting motor. Make sure frequency is going up. Stop inverter and turn off the breaker.

4. Connect the motor.

5. Adjusting the speed pot. slightly CW should start the motor turning, if motor runs backwards: stop inverter, turn off power, and reverse any two output leads U, V, W to correct direction.

6. Forward/Reverse (If used) should be checked while motor is running. Engage switch to reverse, motor should stop, and reverse direction to the same speed it was running in forward.

7. increase speed to full speed slowly, watch motor operation. Leave setting at full speed. Switch to STOP Motor should decelerate or coast without tripping off inverter. Switch to RUN, motor should accelerate smoothly to full speed without tripping inverter.

Variable Resistors (On Power Unit Control Board)

The variable resistors are adjusted to specification at the factory and should not be touched unless necessary.

(Caution when adjusting)

1. Small-scale precision type variable resistors are used. Use a well insulated thin type minus screwdriver.

2. When the power is on, a high voltage is applied to the parts on the printed circuit board. Also, after the power is turned off. the large capacitor is charged for about five (5) minutes.

WARNING

Do not touch any circuit while the CHARGE lamp Is on.

3. A digital counter and an oscilloscope are necessary for readjustment. Do not ground the instruments when connecting and keep the input impedance of the instruments over 10 K ohms.

4. When monitoring the waveform with an oscilloscope, turn off the power before connecting or disconnecting the probe.

TABLE 3-1. Description of Variable Resistor (RH)

Section

RH Mo.

Jumper

Symbol Adjustment Function

1RH

2RH

3RH

4RH V-GN

SRH

6RH

7RH

8RH 9RH

10RH

When the RH la Túrnad Clockwiae

Remote frequency meter

calibration

FRO

V-BS

l-GN Current input gam Output gain decreases

ACC

DEC

Output frequency adjustment

Output voltage b<a$ (Voltage boost)

Output voltage gam V/F ratio decreases

I-B8 Current irtput bias Output V and F increase

Acceleration time adjustment

Deceleration lime adjustment

REF input upper limit

UL LL REF input lower Nmit Limit value increases

Deceleration time control

.Sweep of the frequency

meter increases Output frequency

decreases Minimum output

voltage increases

Acceleration time decreases about 20 sec 1 about 120 s

Deceleration time decreases about 20 sec 1 — about 120 s

Limit value increases

When connected, increases decel time to avoid O P inp

Adjuatment

At Shipment

connected

Note: Do not touch variable resistors which are not described above.

Adjustment Procedures

Remarks

60 Hz

100%

0% 4 mA input

100%

60 Hz

0 Hz

20 mA input

Cut jumper when

using dynamic bra-

The ESP-G1 Built-up Assembly is adjusted for standard 3 to 60 Hz operation. Before

readjusting, determine if factory adjustment is not satisfactory, if the speed range is not correct for the motor or machine, reca ibration is necessary. If inverter stalling or shut

down occurs during normal machine operation, adjustment is necessary. Table 32, page shows a list of adjustments and ranges.

WARNING!

Adjusting the Inverter with power on requires special precautions: Ail test equipment should be connected and disconnected with

POWER OFF. High voltage exists on the base driver board, all potentiometers

should be adjusted with insulated handie screwdrivers. Grounded test equipment, such as oscilloscopes, may damage the

inverter. Isolate all instruments from ground before using. The O.C. bus

remains charged for several minutes after power is removed.

Section 5

Table 3-2 shows a test sheet that gives test points and voltages at different speeds to aid

readjustment. The following describes each test point:

TABLE 3-2

OCSCmPTtON

OF TEST

S^EO REFCRE^*C£

«.20 mA INPUT IRC 204 V

V V 0 V 25 V i V S V &S7 V «■voc

HERTZ

TEST POINT

TO 0 Hx 90 Hx

RÉF

0 ms

0 V 6 V

5.1 V

Jti9 ms jOM ms

MKx

NO LOAD

12 V

ai6v • 1«V

00 Kx

FULL LOAD saHtHAi TYPE

12 V

♦voc

10.2 V

♦voc

ù\n ms

PULSE

HERTZ

SPEED REFERENCE ~ is measured at the wiper of the speed pot. at the power unit. REF to OV. 12 VDC means maximum output of the inverter.

4 to 20 mA REFERENCE is measured at terminal IRF to OV. Potentiometer 5RH adjusts for zero speed at 4 mA.

Voltage. Frequency REF is measured at test point REF to common. Factory set at the voltages shown in Table 4, potentiometer 9RH can be used to adjust desired maximum output frequency. The V/Hz ratio stays the same for proper motor operation. Potentiometer

10RH adjusts the minimum speed.

V is used to determine the V/Hz ratio. Measured at V test point to common, SV means maximum output voltage has been reached.

HERTZ - is measured at OF test point. Hertz is a strobe pulse with a frequency 1152 times inverter output frequency. 69, 120Hz means the inverter is running 60 Hz. (This

testpoint is an open collector and requires a pullup 20K ohms resistor for readouts.)

VOLTAGE BOOST - is a V/Hz adjustment at 3 RH. Output voltage at low frequencies is raised for more starting torque.

A procedure is described below for recalibrating the power unit assuming all poten tiometers are misadjusted. When using an oscilloscope or frequency counter, the motor does not have to be connected.

1. Initial Conditions 3RH - full counter clockwise (C.C.W.), 9RH - full C.W., 10RH - full C.C.W.

2. Set Maximum Frequency. Run inverter. Adjust poL 2RH for desired maximum speed

with manual speed pot. fully clockwise. Digital frequency meter will show true output hertz.

3. Calibrate Remote Meter. Use 1RH pot. to set scale on optional remote meter.

4. Adjust Volts Per Hertz. Turn manual speed pot. to 60 Hz. Adjust 4RH pot. for

5 VDC @ test point “V" to Com.

5. 4 to 20 mA Input. Enable auto mode. Minimum speed at 4 mA can be adjusted with

pot. 5RH. Maximum speed at 20 mA can be adjusted with pot. 6RH. Pots. 5RH and 6RH interact.

Section

FIGURE 3-1

6. Upper and Lower Limits Pot. lORH adjusts lower limit and will override minimum speed set in step 5. Pot. 9RH adjusts upper limit and will override maximum speeds set in 2 and 5.

7. Voitag« Boost Pot. 3RH increases low speed breakaway torque. Note: High voltages at low frequency may burn up the motor.

8. Overvoltage Level factory set for safe operation. It should never be adjusted.

9. Check Motor Current at several different operating speeds after completion of adjustments. Continuous currents above the motor nameplate (rated) current may damage the motor.

Section 5

Jumper Connections

Jumpers are connected to specification at the factory and should not be changed unless necessary. The locations of jumpers are shown on Figure 5^2, page 24.

The function of each jumper is as follows.

Symbol on

No.

Jt3

Circuit Board Function

Ш.

If 2f 4f

16 6 ¿1

SQ HZ 60 HZ

о 0

lO о

X6 XI

Ratio of output frequency can be changed. 2f...Output frequency is doubled. 4f...Output frequency is quadrupled.

Output frequency can be switched between 50 H2 and 60 Hz according to jumper selection.

Disconnect when adding regenerative discharge resistor unit (option).

Acceleration/Deceieration time can be changed XI — 1 -i- about 20 sec X6 6 ~ about 120 sec Available in some models

Note 1: Do not touch jumpers that are not described above. Note 2: J2 and J3 jumpers —

The V/F characteristic is as follows when J2 and J3 jumpers are switched,

a) When J3 is set to 50 Hz b) When J3 is set to 60 Hz

Connection

at Shipment

60 Hz

Connected

(XITPUT FREQUENa (HZ)

0.S 60.......80

.........................

OUTPUT FREOUEtO (HZ)

120 »»160 240»» 320

Section 5

Figure 3-2 shows location of terminals, adjusting resistors, and FREQUENCY/FAULT display on the Printed Circuit Board.

FIGURE 5*2

•lA Otl'«

fRIKTES CJffCUIT mus

OMRCC

OUIN CIRUIT

OMRCE IWICATOO

KAIH CONTROL HUNTED CIRCUIT BOARD

I III i

ulu

FL8 FLA

(BASIC OUTPUT

FREOUEHCT

SELECT JIMCR}

J3 -^1

90 HZ BO KZ

J13

XI X6

OH RSTST R

¿L

(CWTROL VOLTAGE OCCX TEAUNALS)

CTir I

z £ 1C ^

(FREBJEXa t fallt OISPUY)

FREDUEXa/FAULT

RESET

(FAULT RESET

BUTTOO

ARN1-B«S Qj TB

Terminal

Symbol

fLC

FLB '‘Open" Output iS obtained between FLB and FlC during inverter fault

FLA

P24V

OH Overtemperature contact input. OH incication when connected to +24 V (normally "Open" contact)

RST

R Reverse operation input. Reverse operation when connected to ST

COM Signal common

FM CM OV Signal common

REF External frequency reference input (0 • 12 VOC) CRF Power supply output to external frequency setting device

IRF

TGP/FI

TGN/N

123

t t

fLC

Signal Common

"Closed" Output is obtained between FLA and FLC during inverter fault

+ 24 volts out

Fault reset input Reset when connected to COM (Normally "open" contact) Start preparation/commar>d input: start preparation complete when ST connected to COM.

then start command complete when F or R is selected

Forward operation input. Forward operation when connected to ST

Remote frequency meter (1 mA mete* between FM and OV) Remote ammeter (i mA meter between CM and OV with 20 K calibration rheostat in series)

Current loop input (4 • 20 mA between IRF and OV) TG feedback signal (TOP • TON) (op'ion)

Pressure convener output (Ft - N) (option) ^ ■ Pressure convener power supply (opiion) Pressure convener set point input (option)

auTPUT fw-

ocxa RATIO

SELECT JUrCR}

izE

If 2f 4f

(ADJUSTING RESISTORS)

1№ 2RH 3RH 4RH

SSS 0H

cno (Aco (v-es) V (v-oo

SRH 6RH 7RH BRK 9RH lORN

(1^ REF (1-00 (ACO 0X0 OU QJJ

r FM CH

Terminal Function

BASE ORIVE SIOUL

OCCX TEAUNALS)

CT2

I OF

0 SSSSS

RCr

L±

90VER OISOiARCE

STSTEX SELEa

(AC-TC FEEDBACK

SYSTEM SELECT

CRT INF

CN 13

JUNPOU

JUMPER)

T(X

CN U

Section 6 OPERATION AND CONNECTION EXAMPLES

1. Connection of remote speed reference signals,

a) With variable resistor (3 K H pot.)

NOTE: Disconrect the cover

mounted speed pot. from terminals CRF, REF, and OV.

b) With curren: input.

c) With voltage input.

NOTE; Disconnect REF lead from

cover mounted pot and

turn pot on. Motor speed

will follow your 0 to 12 V input signal.

d) Switching between variable resistor and current input.

4 to

20 mA

3kfì

0.1 w

[;

—^CRF

IRF

OV E

SW'ON: Variable resistor is

selected.

SW-OFF: 4 to 20 mA current is

selected.

NOTE; The variable resistor is to be mounted with a switch (SW). 4 to 20 mA

current input is selected when the switch Is turned ok Use a 20 mA cur rent rated switch. For local/remote operation, the standard cover mounted speed pot has an integral switch which wilt allow the 4-20mA signal to control the motor SPEED when the pot is in the OFF position.

CRF REF

Section 6

e) Switching between two or more variable resistors:

Two or more pots are set at different frequencies and selected.

Use small current rated relay for selection.. Disconnect the door mounted pot from terminals CRF, REF. and OV

f) Multiple inverter cascading with one setting device:

Connect 3 K ohm w resistor between CRF and OV terminal of each slave unit. Disconnect the door mounted pots on all units.

No 1 uak

g) Multiple inverter cascading from one process signal:

4 to 20 mA input signal cannot be used. Use voltage (0 to 12v) signal only in to all inverters. Turn door mounted speed pots into OFF position.

h) Selection of a variable resistor other than 3 kn for speed setting.

(3 kn variable resistor is furnished on inverter door)

A 750n fixed resistor is to be used as R1 in the inverter unit so that the REF value (Vf^Ep) is between 0 and 12V when regulator R2 is 3 kn and the voltage (Vnep) is divided by R1 and R2.

If the resistance value of the regulator is to be changed, a compensation resistor

R3 is required.

-€4eTv^

{refI

CRF U 750 n REF OV

I5v

Section 6

Obtain the compensation resistance R3 by substituting the value of the generator (R2) in the following equation.

REF

If a fixed resistor cannot be selected because R3 is not a round number, change R2

or use a variable resistor for R3.

Selection examples:

<f - 1> When using a 5 k ohms

Note: If the regulator is less than 3 k ohms, REF voltage becomes less than 0 to 12 V

and the maximum inverter output frequency decreases. Therefore R3 must be greater than 3 k ohms. However, if V/F characteristic between 9 and 12 V (shaded area) is not required, a regulator between 1.2 and 3 k ohms can be used.

15 V X Rj

75011 + Rj + R3

3 X Ra - 9000

variable resistor

= 12 V

(n) where 5 kn > Ra > 3 kn

<f - 2> When using a 3.3 k ohms

variable resistor

Examples:

1) When 1.5 k ohms Vqgp: 0 to 10 V variable Output frequency: 0 to 66.7 Hz

2) When 2.5 k ohms

0 to 11.5 variable

Output frequency: 0 to 76.7 Hz

2. Connection of remote frequency meter and ammeter.

a) Connection of remote frequency meter (FM)

• When the operating frequency is to be displayed externally in addition to the digital display on the unit, use DC1 mA meter.

• When using multiple meters, connect meters with the same rating in series.

J2.

I~0^'

-H

Section 6

b) Connection of remote ammeter (AM)

• Use DC 1 mA meter

• Use a 20 K ohms variable resistor for the scale calibration.

• When using multiple meters, connect meters with the same rating in series.

3. Connection of run signals (forward, reverse) a) When operating in one direction only

• Connect ST terminal directly to either F (forward) or R (reverse) terminal with jumper.

• Connection must be made by customer between COM and ST on all 1.5 to

5.5KVA units and between STl and COM on all 8 to 33KVA units. Solid jumper gives programmed STOP. MC interlock gives choice of coast or

programmed STOP.

b) When operating in both directions

• Use FOR - REV switch as below. (1)

Existing

$W<IC^ c

20híl

Note: If both F (forward) and R (reverse) operating signals are connected at

the same time. F (forward) command will override.

(1) Use single pole, double throw, toggle switch rated for 24V DC.

c) Acceleration and deceleration

• Connect DRIVE switch and MC AUX as below.

DRIVE twitch

ó F or R

Ó ST (STl)

¿COM

Inverter output frequency changes according to the preset acceleration and deceleration rates when unit is started or stopped.

DRIVE

twitch

Speed

MC: Input main contactor AUX.

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