Huayuan Electric ZX7-HD Series User manual

ZX7-1000HD
ARC WELDING MACHINE
MANUAL
INSTRUCTION
(PLEASE READ CAREFELLY BEFORE OPERATING)

Safety Depends on You
Huayuan arc 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 on your part.
DO NOT INSTALL, OPERATE OR REPAIR THIS EQUIPMENT WITHOUT READING THIS MANUAL AND THE SAFETY PRECAUTIONS
CONTAINED THROUGHOUT.
Caut ions
Arc and arc rays may harm health.
Arc welding can be hazardous. All performing welding workers ought to have health qualification that provided by
authority organization. Protect yourself and others from possible serious injury or death. Keep children away. Pacemaker
wearers should consult with their doctor before operating. Be sure that all installation, operation, maintenance and repair
procedures are performed only by qualified individuals.
●Electric shock can kill: The electrode and work (or ground) circuits are electrically “hot” when the
welder is on. Do not touch these “hot” parts with your bare skin or wet clothing, Wear dry, hole-free
gloves to insulate hands. Users need to follow the below items to avoid electric shocks:
Insulate yourself from work and ground using dry insulation. Make certain the insulation is large enough to cover
your full area of physical contact with work and ground. Otherwise, use automatic or semiautomatic welding
machines, DC welding machines as possible as you can.
In semiautomatic or automatic wire welding, the electrode,electrode reel, welding head, nozzle or semiautomatic
welding gun are also electrically“hot”.
Always be sure the work cable makes a good electrical connection with the metal being welded. The connection
should be as close as possible to the area being welded.
Ground the work or metal to be welded to a good electrical(earth) ground.
Maintain the electrode holder, work clamp, welding cable and welding machine in good, safe operating
condition. Replace damaged insulation.
Never dip the electrode in water for cooling.
Never simultaneously touch electrically“hot”parts of electrode holders connected to two welders, because voltage
between the two can be the total of the open circuit voltage of both welders.
When working above floor level, please do wear safety belt to avoid falling or losing balance on electric shock.
●Arc rays can burn: Use a shield with the proper filter and cover plates to protect your eyes from sparks
and the rays of the arc when welding or observing open arc welding. Head shield and filter lens should
conform to nation standards.
Use suitable clothing made from durable flame-resistant material to protect your skin and that of your helpers
from the arc rays.
Protect other nearby personnel with suitable, non-flammable screening and/or warn them not to watch the arc
nor expose themselves to the arc rays or to hot spatter or metal.

●Fumes and Gases can be dangerous: Welding may produce fumes and gases hazardous to health.
Avoid breathing these fumes and gases. While working in limited room, use enough ventilation and/or
exhaust to keep fumes and gases away from the breathing zone, or use the respirator.
Shielding gases used for arc welding can displace air and cause injury or death. Always use enough
ventilation,especially in confined areas, to insure breathing air is safe.
Do not weld in locations near chlorinated hydrocarbon vapors coming from degreasing, cleaning or spraying
operations.The heat and rays of the arc can react with solvent vapors to form phosgene, a highly toxic gas, and
other irritating products.
Read and understand the manufacturer’s instructions for this equipment and the consumables to be used,
including the material safety data sheet (MSDS) and follow your employer’s safety practices. Make sure they are
asepsis and innocuity.
●Spatter: Welding or cutting spatter can cause fire or explosion.
Remove fire hazards from the welding area.If this is not possible, cover them to prevent the
welding sparks from starting a fire. Remember that welding sparks and hot materials from
welding can easily go through small cracks and openings to adjacent areas. Avoid welding near hydraulic lines.
Have a fire extinguisher readily available.
Where compressed gases are to be used in the field, special precautions should be used to prevent explosion.
When not welding, make certain that no electriferous part is touching the work piece or the work stage.
Accidental contact can create a fire hazard.
Do not weld containers or lines, which are not proved to be innocuity.
Do not heat, cut or weld tanks, drums or containers until the proper steps have been taken to insure that such
procedures will not cause flammable or toxic vapors from substances inside. They can cause an explosion even though they
have been“cleaned”.
Spatter might cause burn. Wear leather gloves, heavy shirt, cuffless trousers, high shoes and a cap over your hair
to prevent from burning by spatter. Wear the ear shield when performing sideways or face up welding. Always
wear safety glasses with side shields when being in a welding area.
The welding cables should be as close to the welding area as possible, and the short, the better. Avoid welding
cables going through the building framework, lifting chains, AC or DC cables of other welding machines and
appliances. The welding current is strong enough to damage them while having short circuit with them.
●Cylinder may explode if damaged.
Make sure that the gas in the storage cylinder is qualified for welding, and the decompression
flowmeter, the adapter and the pipe are all in good condition.
Always keep cylinders in an upright position securely chained to an undercarriage or fixed support.
Be sure to put the cylinder in the working space with no crash or shake, and far from welding area.
Never allow the electrode, electrode holder or any other electrically“hot”parts to touch a cylinder.
Keep your head and face away from the cylinder valve outlet when opening the cylinder valve.
Valve protection caps should always be in place and hand tight except when the cylinder is in use or connected for
use.
●Power: (For electrically powered welding and cutting equipment) Turn off input power before
installation, maintenance and repair to avoid accidents.
Huanyuan welding equipment is Ι class safeguard equipment; please install the equipment in
accordance with the manufacturer’s recommendations by specific persons.
Ground the equipment perfectly in accordance with the manufacturer’s recommendations.
●Power:(For engine driven welding and cutting equipment)
Work in ventilated place or outdoors.

Do not add fuel near to fire or during engine starting or welding. When not working, add fuel
after engine is cooling down; otherwise, the evaporation of hot fuel would result in dangers. Do
not splash fuel out of the fuel tank, and do not start the engine until complete evaporation of the
outside fuel.
Make sure that all the safeguard equipments, machine cover and devices are all in a good
condition. Be sure that arms, clothes and all the tools do not touch all the moving and rotating
components including V belt, gear and fan etc.
Sometimes some parts of the equipment have to be dismantled during maintenance, but you still have to keep the
strongest safety awareness .
Do not put your hand close to fans and do not move the brake handle while operating.
Please remove the connection between the engine and the welding equipment to avoid sudden starting during
maintenances.
When engine is hot, it is forbidden to open the airtight cover of the radiator water tank to avoid hurt by the hot
vapor.
●Electromagnetic: Welding current going though any area can generate electromagnetic, as well as the
welding equipment itself.
Electromagnetic would affect cardiac pacemaker, the cardiac pacemaker users should consult
one’s doctor first.
The effect of electromagnetic to one’s health is not confirmed, and it might have some negative effect to one’s
health.
Welders may use following method to reduce the hazardous of electromagnetic:
a. Bundle the cable connected to the work piece and the welding cable together.
b. Do not enwind partially or entirely your body with the cable.
c. Do not place yourself between the welding cable and the ground (work piece) cable, if the welding cable is by your left
side, then the ground cable should be by your left side too.
d. The Welding cable and the ground cable are as short as possible.
e. D e. Do not work near to the welding power source.
●Lifting equipment: carton or wooden boxes package the welding machines supplied by Huayuan.
There is no lifting equipment in its wrapper. Users can move it to the prospective area by a fork-lift
truck, then open the box.
If there are rings, the machine can be transited by rings. While Huayuan Welding Machine
Manufacture reminds users, there is potential risk to damage the welding machine. So it is better
to push the welding machine by its rollers unless special situations.
Be sure that the appurtenances are all removed off when lifting.
When lifting, make sure that there is no person below the welding machine, and remind people
passing by at any moment.
Do not move the hoist too fast.
●Noise: Huayuan Welding Machine Manufacture reminds users: Noise beyond the limit (over 80 db)
can cause injury to vision, heart and audition depending on oneself. Please consult local medical
institution. Use the equipment after doctor’s permission would help to keep healthy.

CONTENT
1 Main usage and application ................................................................................................................................1
2 Working condition and Environment ...................................................................................................................2
2.1 working environment condition ...................................................................................................................2
2.2 Power input..................................................................................................................................................2
2.3 Safety precautions........................................................................................................................................2
3 Technical specification.........................................................................................................................................2
3.1 Parameter.....................................................................................................................................................2
3.2 Welding electrode and related parameter setting.........................................................................................3
4 Hardware Overview.............................................................................................................................................3
5 General description .............................................................................................................................................3
5.1 Working principal .........................................................................................................................................3
5.2 Principal diagram..........................................................................................................................................4
6 Installation and adjustment ................................................................................................................................4
6.1 The moving and lifting..................................................................................................................................4
6.2 Installation and operation conditions...........................................................................................................4
7 Operations...........................................................................................................................................................5
7.1 Panel instruction ..........................................................................................................................................5
7.2 Function introduction...................................................................................................................................6
8 Maintenance .......................................................................................................................................................6
9 Troubles and troubleshooting..............................................................................................................................7
10 Packing List........................................................................................................................................................8
11 Drawing (The principle drawing of the main circuit) ..........................................................................................9

1
1Main usage and application
1. This Series welding machine can be used for different types of electrode, especially suitable for hydrogen electrode
to weld low carbon steel, mid-carbon steel and their alloy work-piece. It is mainly used in the industries like
ship-building, boiler, power tower, petroleum and construction industries.
ZX7-HD series is one of our newest energy-saving power source, which with excellent technical standard and welding
craft.
ZX7-1000HD inverter arc welding machine has advantages below:
● Good dynamic characteristic, stable arc, good performance, little spatter
● Wide distribution voltage: 380VAC±60VAC
● Arc force adjust function
● Hot current adjust function
● Welding current preset function
● Digital controlled, Easy to operate, with remote control connector
● Lack voltage, over heat protection function
● Input voltage fluctuation compensation function, keep stable output current
● It can be controlled by a wireless network management system
● High efficiency, Low non-load loss
● Small volume, light weight, easy to move
2. Model specification
This welding machine designed and produced according to the GB15579.1-2004、JB/T7824-1995
Model develop instruction
Z X 7 —□□□ H D
Machine code
For heavy duty cycle welding
Rated welding current
Inverter type
Constant voltage
Dc type welding machine
Symbol instruction:
Please read the
manual
Ground
Positive pole
Negative
pole
Parameter
increase/Decreas
e
Dangerous
voltage
Current
Voltage
Air gouging
MMA

2
2Working condition and Environment
2.1 working environment condition
Altitude less than 1000m;
Temperature:
Working：－10～＋40℃
Storage：－25～＋55℃
Relative humidity:
50%≥ on 40℃
90%≥ on 20℃
Do not locate where there is harmful gases, chemical depositions, mycete, and other explosive or corrosive
substances, prevent shaking and jolt.
Keep the machine inside and dry all the times, do not place it in a confined space, do not locate where the
machine is exposed to direct sunlight.
2.2 Power input
Voltage input：3～380V/50Hz；
Voltage fluctuation range＜±10%；
Frequency fluctuation range＜±1%；
Three-phase voltage imbalance rate＜±5%；
If use engine power generator: the generator output capacity should be two times higher than the welding
machine input capacity, and with compensating coil.
2.3 Safety precautions
Open and check the machine: only qualified personnel should perform to avoid danger or machine damage;
Turn off input power before open the machine, do not touch the electrical conductors to avoid electric shock.
Dirt and dust which may cause short circuit should be kept to a minimum.
Welding may produce fumes and gases hazardous to health. Use enough ventilation and exhaust at the arc to
keep fumes and gases away from the breathing zone.
Arc rays may cause eye injury, please do not watch the arc nor expose to the arc rays.
Remove fire hazards from welding area, welding sparks and hot materials from welding can easily go through
small crack and cause fire.
3Technical specification
3.1 Parameter
Model
ZX7-1000HD
Input power
3～380V±15%／50Hz
Rated input capacity（KVA）
58.6
Rated input current（A）
89
Open cuircuit voltage（V）
100
Rated welding current（A）
1000
Rated welding voltage（V）
44
Rated duty cycle（％）
100
Current adjust range（A）
40～1000
Insulation grade
F
Dimension(L×W×H)(mm)
795×410×835
Weight（Kg）
89

3
*Rated duty cycle 60% means, take 10min as the working cycle, the welding machine work 6min under the rated current
status, rest for 4min. When the welding machine work more than 6min, the temperature in the machine will higher than the
setting value, the overload indicator will on, and machine no output until the temperature in the machine lower to the setting
value. When the overload indicator off, the machine can work again.
3.2 Welding electrode and related parameter setting
422 type electrode
Electrode dia.(mm)
3.2
4.0
5.0
6.0
Welding current(A)
100～150
160～210
200～270
260～300
507 type electrode
Electrode dia.(mm)
3.2
4.0
5.0
6.0
Welding current(A)
100～140
140～180
180～230
240～270
Current using range for round electrode rod
Electrode rod (mm)
6
7
8
9
10
12
Welding current(A)
300～350
350～400
400～450
450～500
500～550
750～850
Current using range for flat electrode rod
Electrode rod (mm)
4×12
5×10
5×12
5×15
5×18
5×20
Welding current(A)
200～400
300～400
350～450
400～500
450～550
500～600
4Hardware Overview
This machine including: shell, inner part, handle and base, while the inner part include: cooling fan, main transformer,
IGBT modules, filter reactor, fast recovery diode modules and PCBs etc.
5General description
5.1 Working principal
ZX7-1000HD series welding machine adopts IGBT as the main circuit switch. The three-phase AC input power inverted to
20KHz HF current through the rectify of the full bridge. While after the depression of the HF transformer, rectified by the FRD
and filtered by the reactor, the HF current will change to the low-voltage but high welding current.
The control circuit control the output current through the adjusting of the pulse width. The negative feedback signal, which
is the real welding current get from the output current sensor, put into the special PWM circuit after compared with the current
adjust signal, then output the driving pulse to control the IGBT, so that the output current will keep stable to get descending
external characteristic.
Force current function: the control circuit will increase the current when the welding voltage less than 15V, so that the
electrode will not stick with the work-piece to enlarge the arc penetration。
1. Welding machine output CC/CV feature diagram
A
U =20+0.04I
H H
H
I
U
(V)
(A)
20 V
15V
图1焊接 电源 输 出的 静外 特性

4
5.2 Principal diagram
6Installation and adjustment
6.1 The moving and lifting
Power off before moving. If the lifting of machine frequent, you should use special lifting equipment. Since the
thrust face is on the bottom of machine, so forklift is the right choice;
Should be lifted vertically;
Welding machines and operation place should be away from combustibles;
Prevent machine from dropping and crash.
6.2 Installation and operation conditions
The installation should be done by authorized person;
The fluctuation of distribution voltage should ≤ +_10%, three phase unbalance rate should < 5%, frequency
fluctuation should ≤ +_1%
This machine requires 3 phase 380v/50Hz power input, so the related power cable and distribution box is
needed, as well as the circuit breaker and ground lead. Reliably connect the protective ground and the
yellow-green wire which on the back of the machine. The wire CSA should no less than the following table
Model
CSA for input copper
wire (mm2)
Breaker capacity
(A)
Fuse protector
(A)
CSA for ground lead
cable(mm2)
ZX7-1000HD
≥16
125
125
≥16
Power lead connection
Open the insulation cover of the terminal box on the rear, use the power lead as above requires, connect it
well, and cover the box.
The connection of the ground cable
The ground cable should be connected well.

5
7Operations
7.1 Panel instruction
Figure 3 ZX7-1000HD front panel
Figure 4 Rear panel
Anti-shock
function
indicator
Voltage
and
channel
display.
Welding
current
Current
adjust
Indicator
Channel
select
Storag
e
Para
select
Local/Re
mote
control
Para
selecti
on