Amada SIT-A191 User manual

Z06M0998E-05
OPERATION MANUAL
INVERTER-TYPE WELDING TRANSFORMER
SIT-A191

SIT-A191
Thank you for purchasing our Inverter-Type Welding Transformer SIT-A191.
•This operation manual explains its method of operation and precautions for use.
•Before using this Transformer, read this operation manual carefully until you have
familiarized yourself with it.
After reading save the manual in place where operators can refer to it at any time.
Contents
1. Special Precautions
(1) Safety Precautions ....................................................... 1-1
(2) Precautions for Handling .............................................. 1-4
(3) On Disposal ................................................................. 1-4
(4) Shipping Kit.................................................................. 1-4
2. Name and Function of Each Section 2-1
3. Installation and Connection
(1) Installation.................................................................... 3-1
(2) Connection................................................................... 3-1
4. Specifications
(1) Specifications............................................................... 4-1
(2) Duty Cycle Graph......................................................... 4-1
5. Troubleshooting 5-1
6. Outline Drawing 6-1

SIT-A191
1. Special Precautions
1-1
1. Special Precautions
(1) Safety Precautions
Before using, read "Safety Precautions"
carefully to understand the correct method
of use.
■These precautions are shown for safe use
of our products and for prevention of
damage or injury to operators or others.
Be sure to read each of them, since all of
them are important for safety.
■The meaning of the words and symbols is
as follows.
Denotes operations and practices that
may imminently result in serious injury
or loss of life if not correctly followed.
Denotes operations and practices that
may result in serious injury or loss of
life if not correctly followed.
Denotes operations and practices that
may result in personal injury or damage
to the equipment if not correctly followed.
Do not touch the “Terminal block” on the rear panel of the Welding
Transformer
Since very high voltage is applied to the “Terminal block”, it is very dangerous
to touch it unnecessarily. When connecting or disconnecting a cable, be sure to
turn off the power. After connecting the cable, install the terminal cover so that
operator can not touch the terminal block during work.
Never disassemble, repair or modify the Welding Transformer
These actions can cause electric shock and fire. Consult us or your distributor
for inspection and repair.
Never burn, destroy, cut, crush or chemically decompose the Welding
Transformer
This product incorporates parts containing gallium arsenide (GaAs).
DANGER
！
W
ARNING
！
CAUTION
！
DANGER
！
These symbols denote
"prohibition".
They are warnings
about actions out of the
scope of the warranty
of the product.
These symbols denote
actions which
operators must take.
Each symbol with a
triangle denotes that
the content gives
notice of DANGER,
WARNING or
CAUTION to the
operator.

SIT-A191
1. Special Precautions
1-2
Do not put your hands between the electrodes
When welding, keep your fingers and hands away from the electrodes.
Do not touch +/- terminal, secondary cable, any welded part or electrodes
during welding and just after welding finished
These parts are very hot. Do not touch them; otherwise you may be burnt.
Ground the Welding Transformer
If the Transformer is not grounded, you may get an electric shock when there
is trouble, or when electricity leaks.
Connect the specified cables securely
Cables of insufficient current capacities and loose connections can cause fire
and electric shock.
Do not damage the power cable and connecting cables
Do not tread on, twist or tense any cable. The power cable and connecting
cables may be broken, and that can cause electric shock and fire. If any part
needs to be repaired or replaced, consult us or your distributor.
Stop the operation if any trouble occurs
Continuous operation after occurrence of a trouble such as burning smell,
abnormal sound, abnormal heat, smoke, etc. can cause electric shock and
fire. If such a trouble occurs, immediately consult us or your distributor.
Persons with pacemakers must stay clear of the welding machine
A person who uses a pacemaker must not approach the welding machine or
walk around the welding shop while the welding machine is in operation,
without being permitted by his/her doctor. The welding machine generates a
magnetic field and has effects on the operation of the pacemaker while it is
turned on.
Protective gear must be worn
Put on protective gear such as protective gloves, long-sleeve jacket, leather
apron, etc. Spatter can burn the skin if they touch the skin.
Wear protective glasses
If you look at the flash directly during welding, your eyes may be damaged.
If any spatter gets in your eye, you may lose your eyesight.
WARNING
！

SIT-A191
1. Special Precautions
1-3
Do not splash water on the Welding Transformer
Water splashed over the electric parts can cause electric shock and short
circuits.
Use proper tools (wire strippers, pressure wire connectors, etc) for
termination of the connecting cables
Do not cut the conductor of wire. A flaw on it can cause fire and electric
shock.
Install the Welding Transformer on firm and level surface
If the Transformer falls or drops, injury may result.
Do not place a water container on the Welding Transformer
If water spills, insulation will deteriorate, and this may cause electric leak and
fire.
Keep combustible matter away from the welding machine
Spatter can ignite combustible matter. If it is impossible to remove all
combustible matter, cover them with non-combustible material.
Do not cover the Welding Transformer with a blanket, cloth, etc.
If such a cover is used, it may be overheated and burn.
Do not use this Welding Transformer for purposes other than welding
Use of this equipment in a manner other than specified can cause an electric
shock and fire.
Use ear protectors
Loud noises can damage hearing.
Keep a fire extinguisher nearby
Keep a fire extinguisher in the welding shop in case of fire.
Maintain and inspect the Welding Transformer periodically
Maintain and inspect the Transformer periodically, and repair any damage
nearby before starting operation.
CAUTION
！

SIT-A191
1. Special Precautions
1-4
(2) Precautions for Handling
Install this Welding Transformer on a firm and level surface. If it is inclined,
malfunction may result.
Do not install this Welding Transformer in the following:
Damp places where humidity is 90% or higher,
Hot or cold places where temperatures are above 40°C or below 5°C,
Places near a high noise source,
Places where chemicals are handled,
Places where water will be condensed, and
Dusty places.
Do not block up the vent slits and provide the clearance of 10
cm minimum for
better radiation.
Do not put a screw, a coin, etc., in the Welding Transformer, since they can
cause a malfunction.
Clean the outside of the Welding Transformer with a soft, dry cloth or one wet
with a little water. If it is very dirty, use diluted neutral detergent or alcohol. Do
not use paint thinner, benzine, etc., since they can discolor or deform the
Welding Transformer.
Operate the Welding Transformer according to the method described in this
Operation Manual.
(3) On Disposal
This product incorporates parts containing gallium arsenide (GaAs). At the time of
disposal, separate it from general industrial waste or domestic waste and carry out
the disposal in accordance with applicable laws and regulations.
(4) Shipping Kit
Verify that contents of the container agree with the kit list.
If you see any damage, please contact us.
Packaged Kit Quantity
SIT-A191 1
Operation Manual 1

SIT-A191
2. Name and Function of Each Section
2-1
2. Name and Function of Each Section
1[+] terminal
Connect the positive (+) cable of
the welding head to this terminal.
2[-] terminal
Connect the negative (-) cable of
the welding head to this terminal.
3[V-SENS] connector
Connect the plug of the voltage-
sensing cable (separately sold).
Connect the other side of this cable
to the screws near the electrode of
the welding head.
4[I/O] connector
Connect the dedicated [SENS]
cable (separately sold) to our
inverter power supply.
5Terminal block
Connect the dedicated output
cables (separately sold) to these
terminals and to our inverter power
supply.
6Terminal cover
This cover is installed so that a
worker will not touch the terminal
block directly.
Keep this cover installed normally.
・DUTY CYCLE :2% (at 10000A)
・SECONDARY CURRENT:10000A(at 1kHz)
・PRIMARY VOLTAGE :300V 1kHz
SPECIFICATION
・SECONDARY VOLTAGE:15.8V (at 1kHz)
Ｖ－ＳＥＮＳ
3
2
1
SENS
INPUT
19 23 ECOM.
6
5
4
Rear Panel
Front Panel

SIT-A191
3. Installation and Connection
3-1
3. Installation and Connection
(1) Installation
Slits are provided on side of SIT-A191 for higher heat radiation efficiency.
Install this transformer in a well-ventilated place and make a clearance of at least
10 cm from the surrounding walls to extract the full performance.
(2) Connection
After selecting a proper place for installation of SIT-A191, connect it to the other
devices according to the explanatory drawings on pages 3-2 to 3.
ATTENTION
Our welding head MH-31AC and welding power supply IS-600A is used in the
explanatory drawings.
The connection varies with the type and using method of the devices to be
used. When connecting them, refer to their instruction manuals.
Make sure to disconnect the power supply before connecting work.
Be sure to install on
firm and level floor.
* Also make a clearance
of at least 10 cm from
the right and left walls.
Condensation
Dust
Dirt
Hot
Cold
Chemical
10cm min.
Suction
Exhaust

SIT-A191
3. Installation and Connection
3-2
V-SENS
NO.
SERIAL
JAPAN
MADE
IN
MH-31AC
SIT-A191
MH-31AC is used in this
connection example.
Choose a welding head accord-
ing to your use conditions.
Securely connect secondary cables to [+] terminal and [- ] terminal with special bolts.
(Select secondary cables
according to welding current and duty cycle.)
Securely connect to
secondary cable connecting screws
on rear panel.
Secondary cable
Voltage sensing cable (1.5m)
VSE-C15- C26TA
All items are sold separately except for SIT- A191.
MODEL：44904

SIT-A191
3. Installation and Connection
3-3
SENS
19 23 ECOM.
INPUT
MH-31AC
SIT-A191
IS-600A
VPE
V
UPE
U
[SENS] cable
SK- 05741- 002 (2m)
Remove
terminal cover
Pass [START] cable through terminal cover and connect.
[START]
cable
Pass [OUTPUT] cable through terminal cover and connect.
NOTE: Shown above is the example when connecting to the tap for 19V. Use the tap for 23V accordingly.
[
OUTPUT
]
cable
#17 #15
All items are sold separately except for SIT- A191.
M8
M8

SIT-A191
4. Specifications
4-1
4. Specifications
(1) Specifications
Rated voltage 300 V (When input voltage to inverter power supply is 220 V AC)
Frequency 1 kHz
No-load secondary
voltage 13 V (23 tap) / 15.8 V (19 tap)
Max. output current 10000 A
Max. duty cycle 2% (10000 A)
Cooling method Forced air cooling
Protection 60°C thermostat switch (built-in)
Operating ambient
temperature 5°C to 40°C
Outline dimensions 298 mm (H) x 160 mm (W) x 280 mm (D)
(Not including projections)
Mass 28 kg
Accessories Operation manual x 1
(2) Duty Cycle Graph
Ambient temperature: 40°C
1 2 3
456 789
Duty cycle (%)
10 20 30 40 50
100
70 100
200
300
400
500
600
700
800
900
1000 2.3%
3.7%
11%
16.7%
6.2%
Secondary current (A)

SIT-A191
5. Troubleshooting
5-1
5. Troubleshooting
Contents
Cause
Measures
Body of
SIT-A191
becomes hot
abnormally.
Fan motor does not work. Consult us or your distributor.
Current does
not flow.
Secondary cables are not
connected correctly. Check that all cables are
connected correctly.
Output cable attached to power
supply is not connected correctly.
Current is
reduced.
Contacts of secondary cables are
oxidized.
Disconnect secondary cables and
polish their contacts.
Internal trouble of transformer Consult us or your distributor.

SIT-A191
6. Outline Drawing
6-1
6. Outline Drawing
(Dimensions in mm)
200
4-φ7
SENS
30
10
(171)
60
25
280 224
160 130
(48)
150
(88)
90
13
(34)
184618
30
285
(32)
M10
注 意
P-00202-001
!注 意
高温注意
P-00202-004 P-00202-003
回転物注意
注 意
! !
P-00202-002
DO NOT OPEN COVER.
注 意
!
Ｖ－ＳＥＮＳ
・DUTY CYCLE :2% (at 10000A) ・SECONDARY CURRENT:10000A(at 1kHz) ・PRIMARY VOLTAGE :300V 1kHz SPECIFICATION ・SECONDARY VOLTAGE:15.8V (at 1kHz)
SENS
INPUT
19 23 ECOM.
<When the Terminal cover removed>
218