Weiro WP-120A Manuale utente
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WP –120A
INVERTER PLASMA CUTTING MACHINE
W E I R O
OPERATION MANUAL
(Read the manual carefully before installation, operation and maintenace)
Safety Depends on You
WEIRO are welding and cutting equipment is designed and built with safety
in mind. However, your overall safety can be increased by proper installation...
and thoughtful operation in your part. DO NOT INSTALL, OPERATE OR
REPAIR THIS EQUIPMENT WITHOUT READING THIS MANUAL AND
THE SAFETY PRECAUTIONS CONTAINED THROUGHOUT. And, most
importantly, think before you act and be careful.
C V. A N U G R A H D U TA N I A G A
Jln. Arief Rahman Hakim 51 Komplek Ruko 21 Klampis Blok D-1
Telp. 031 –5990089, 5997259 (Hunting)
Fax. 031 –5966099
Email : adn_office@yahoo.com
１６
Index
1. Principle &Technical
data…………………………………………………….(1 )
2. Features &
Applications……………………………………………………....(5 )
3. Installation
Guide………………………………………………………….….(6 )
4. Operating
Instruction …………...…………………………………………....(9)
5. Repair &
Maintenance……………………………………………………......(12)
１７
Principle & Technical data
WP 120A Block diagram of principle
3~380V/50Hz
Figure 1: Block diagram of principle
This series of cutting machines applies IGBT Middle Frequency inverter technology. Line
frequency 3-phase input volt are rectified by rectifier, inverted into MF AC by IGBT components,
insulated by MF transformer, rectified and filtered by MF rectifier, then outputs DC power
suitable for cutting. After this process, the cutter’s dynamically responsive speed has been greatly
increased, so the transformer and reactor size and weight are reduced noticeably, thus achieving
energy-saving.
Power sources enjoy sound drooping outer ability and anti-fluctuating ability due to loop control
of reasonable logic circuit design. First, the signals of the set parameters transmit into set circuit
to adjust output current. Secondly, the feedback circuit amplifies output current to get feedback
signal. PWM circuit compares the set signals with feedback signals to determine output pulse
width. Finally, driving circuit will control pulse to amplify power to drive IGBT. Meanwhile,
protection circuit monitor over-current, low-voltage and overheat phenomenon to ensure reliable
cutting. Because of reasonable sequence of logic control, the cutters can perform pre-gas flow,
HF arc start, cutting and post-gas flow convenient for operators.
U0
I2min I2max
Figure 2: Model WP 120AVolt-Ampere curve
Rectifier
MF
Inverter
MF
Transformer
Rectifier &
Filter
Control circuit
High frequency arc start
U（V）
I(A)
１８
1. Main technical parameters
Items Model
WP120A
Input volt (V)
Three phase 380 /
50Hz
Rated input capacity（KVA）
25.7
Rated input current（A）
37
Range of output current（A）
30－120
Open load （V）
345
Rated load volt（V）
128
Rated duty cycle
60%
Air pressure for cutting torch
（MPa）
0.45
Gas flow rate（L/min）
250
Max cutting thickness for carbon
steel（mm）
35
Optimum cutting thickness for
carbonsteel
1-30
Dimension
576×297×557
Weight（Kg）
43.5
Insulated class of main
transformer
H
Insulated class of output
reactor
B
Table 1: Parameter Specification
１９
2. Main circuit diagram
WP120A
Figure 3: Main Circuit Diagram of WP 120A
２０
3.Main components list
WP120A
No
Name
Model
Remark
K1
Circuit breaker
DZ47-63D (40A/3P)
D1
Three-phase rectified module
MDS100A-1200V (big)
R1
Varistor
MYL1 625/5
V1～2
IGBT module
SKM100GB128D
C5
Polypropylene capacitor
MFD-DA01 4uF/500VAC
IGBTZRB
IGBT protection Board
NBC-500Ⅱ.5.1.0
T1
Main transformer
LGK-100.3.1.0
D2
Fast recovery diode module
DWC2F100N060S
D3
Fast recovery diode module
DWC2F100P060S
L2
Current exchange inductor
ZX7-400Ⅲ.5.2.0
T4
Transformer for ZKB/QDB
ATIG-500.3.1-8
F1
Fuse
2A(5×20)
M
Fan
AK2072HB
220V single
phase
SW
Thermal switch
JUC-6F 70℃ (close)
QDB
Drive board
ZX7-400Ⅲ.7.0
ZKB
Main control board
LGK-100.6.0
DF
Electromagnet valve
DF2-5(0.8MPa)
AC36
Switch
KCD4-202
Potentiometer
WH118-2W-4.7KΩ
Adjusting
ampere
Table 2: Main Components List of WP 100A / 120A
２１
Features & Applications
This series inverter air plasma cutting machines, which are new-designed for metal
processing, apply IGBT as well as PWM (Pulse width Modulation) soft switch technology.
This series cutting machines can cut all types of metal materials, especially for high alloy
steel and non-ferrous metals that can not be cut by using flame cutting machine. This series
cutting machines enjoys reasonable static characteristic and sound dynamic characteristic,
can perform HF arc start.
Features and benefits:
HF inverter, small size, light weight.
Soft switch transform, high efficiency.
Delayed post-flow can protect plasma torch effectively.
Outstanding cutting quality with trim and slick edge.
Short-circuit protection inside cutting torch.
HF arc-starting, easy to strike.
Non-source power factor compensation technology, high PF.
2 cycle / 4cycle operating modes provided.
Thermal protection provided.
Applications:
Suitable for cutting mild steel, alloy steel, stainless steel, Copper, Aluminum and other
non-ferrous metals.
This series cutting machines manufacturing strictly comply with National standard
GB15579.1-2004<<”Arc welding equipment” Chapter one: Welding Power Source>>
２２
Installation Guide
1．Pre-installation
1.1 Installation Environment
The WP series is designed for use in adverse environments. Examples of
environments with increased adverse conditions are:
In locations in which freedom of movement is restricted, so that the operator is
forced to perform the work in a cramped (kneeling, sitting or lying) position
with
physical contact with conductive parts;
In locations which are fully or partially limited by conductive elements, and in
which there is a high risk of unavoidable or accidental contact by the operator;
In wet or damp hot locations where humidity or perspiration considerably
reduces
the skin resistance of the human body and the insulation properties of
accessories.
Environments with adverse conditions do not include places where electrically
conductive parts, in the near vicinityof the operator, which can cause increased
hazard, have been insulated.
1.2. Installation Location
Be sure to locate the welder according to the following guidelines:
· In areas, free from moisture and dust.
· Ambient temperature between 0 degrees C to 40 degrees C.
· In areas, free from oil, steam and corrosive gases.
· In areas, not subjected to abnormal vibration or shock.
· In areas, not exposed to direct sunlight or rain.
· Place at a distance of 12" (304.79mm) or more from walls or
similar boundaries that could restrict natural airflow for cooling.
２３
1.3 Power Source Connections
Warning
Thermal Arc advises that this equipment be electrically connected by a
qualified electrician.
ELECTRIC SHOCK can kill; SIGNIFICANT DC VOLTAGE is present after
removal of input power.
DO NOT TOUCH live electrical parts.
SHUT DOWN welding power source, disconnect input power employing
lockout/tagging procedures.
Lockout/tagging procedures consist of padlocking line disconnect switch in
open position.
Removing fuses from fuse box, or shutting off and red-tagging circuit breaker
or other disconnecting device.
1.4. Power Supplier Requirement
Input volt must be standard sine wave, effective value 380V, frequency 50Hz.
Unbalance degree of 3-phase volt must be no more than 5%.
Power supply
Product type
WP120A
Power supply
3 phase
AC380V/50Hz
Min. capacity
Power network
38.5 KVA
Generator
51.4 KVA
Input volt
protection
Fuse
50 A
Circuit breaker
63 A
Cable size
(cross-section)
Input volt
4 mm2
Output volt
15 mm2
Ground lead
4 mm2
Table 3: Power supply connection
Note: The sizes of fuse and breaker in the table are for reference only.
２４
4. Installation:
This series of cutter is small, light and portable. They will be more convenient when being
placed on the trolleys. Ensure the location where the cutter is to be placed is even.
ACUT series of cutters wire diagram as Figure 5:
Figure 4: Connection Chart for WP series
1. 3-phase 380V power source
2. Gas hose
3. Air compressor
4. Cutting torch
5. Output cable
6. Workpiece
The max gas pressure of optional air compressor should be 0.8 Mpa and gas flow rate be no less
than 250L/min.Connect air compressor to inlet of air gauge on the rear panel of cutter. Turn on air
compressor to let gas pressure climb up to proper value for cutting. Then turn on air switch on the
rear panel of the cutter.
Indice
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