Ⅰ Overview
To follow the development of 5G communication, an outdoor integrated power supply system meeting the application needs of communication industry is developed, which is used in harsh environment such as iron tower lamp pole, indoor weak current well and micro station to supply power to communication equipment such as RRU at the end of the communication network. It can be used in situation like wall hanging, holding pole and angle steel tower, and supports flag and paperback installation.
The input voltage range of 5G outdoor integrated power supply system is 85 ~ 300Vac, the rated output is 57Vdc, and PFC power factor correction is provided. The power supply system adopts digital control and realizes communication function through CAN and 485. It has the functions of input overvoltage, undervoltage protection, output overcurrent protection, output overvoltage protection, output short circuit protection and automatic current sharing. The system integrates monitoring and FSU, and can report power information to users through 485 communication, 4G communication and WiFi or Bluetooth.
Ⅱ Product specifications
|
Model |
Output voltage (Vdc) |
Output current range (A) |
Output voltage regulating range (Vdc) |
Ripple (peak) (rated load, bandwidth limit 20MHz) |
|
MP3K |
57 |
0～62.5 |
42～58 |
200mV |
Ⅲ Referenced standards and specifications
GB / T 2423.1-2001 Environmental testing of electrical and electronic products, Part 2: Test methods / Test A: Low temperature
GB / T 2423.2-2001 Environmental testing of electrical and electronic products, Part 2: Test methods / Test B: High temperature
GB / T 2423.3-1993 Basic environmental test procedures for electrical and electronic products - Test Ca: Method of constant damp heat ;
GB / T 2423.4.1993 Basic environmental test procedures for electrical and electronic products - Test Db: Method of alternating damp heat
GB / T 2423.5-1995 Environmental testing of electric and electronic products, Part 2: Test methods / Test Ea and guidelines: impact
GB / T 2423.6-1995 Environmental testing of electric and electronic products, Part 2: Test methods / Test Ea and guidelines: collision
GB / T 2423.8-1995 Environmental testing of electric and electronic products, Part 2: Test methods / Test Ed: free fall
GB / T 2423.10-1995 Environmental testing of electric and electronic products, Part 2: Test methods / Test Fc and guidelines: vibration (sinusoidal)
GB / T 2423.11-1997 Environmental testing of electrical and electronic products, Part 2: Test methods / Test Fd: roadband random vibration - General requirements
GB / T 2423.22-2002 Environmental testing of electrical and electronic products, Part 2: Test N: temperature change
GB / T 14508-93 Environmental conditions of freight transport machinery on class highway
En55022 1998 information technology equipment - radio interference characteristics - Limits and measurement methods;
EN55024 1998 information technology equipment - anti interference characteristics - Limits and measurement methods;
CEI IEC 61000-4-2 2001 Electromagnetic compatibility Testing and measurement techniques Electrostatic discharge immunity test
CEI IEC 61000-4-3 2002 Electromagnetic compatibility Testing and measurement techniques Radiated Immunity test of RF electromagnetic field
CEI IEC 61000-4-4 1998 Electromagnetic compatibility Testing and measurement techniques Immunity test of electrical fast transient burst
CEI IEC 61000-4-5 1999 Electromagnetic compatibility Testing and measurement technology Surge (impact) immunity test
CEI IEC 61000-4-6 2001 Electromagnetic compatibility Testing and measurement techniques Immunity to conducted disturbances induced by RF fields
CEI IEC 61000-4-8 1993 Electromagnetic compatibility Testing and measurement techniques Immunity test of power frequency magnetic field
CEI IEC 61000-4-11 1994 Electromagnetic compatibility Testing and measurement techniques Immunity tests for voltage sags, short interruptions and voltage variations
CEI IEC 61000-4-29 2000 Electromagnetic compatibility Testing and measurement techniques Immunity test for voltage sag, short interruption and voltage change of DC input port
IEC 61000-3-2 2001 Electromagnetic compatibility Limits Harmonic current emission limits
IEC 61000-3-3 1994 Electromagnetic compatibility Limits Voltage fluctuation and flicker in low voltage power supply systems
GB4943-2001 Security of information technology equipment
YD / T 282-2000 General test method for reliability of communication equipment
GB / T 13722-92 Technical requirements and test methods of mobile communication power supply
YD / T 732-95 Test method of DC-DC converter for communication
YD / T 731-2002 High-frequency switching rectifier for communication
Ⅳ Environment condition
|
No. |
Item |
Technical indicators |
Unit |
Remarks |
|
1 |
Ambient temperature |
-40～+55 |
℃ |
When the ambient temperature is below 40 ℃, it can start at full load and work normally at + 55 ℃. When the internal temperature of power supply reaches the protection set value of 100 ℃, the power supply is under overtemperature protection; When the temperature drops to 90 ℃ of the recovery point, the power supply will automatically return to normal output. |
|
2 |
Working humidity |
≤90 |
% |
40℃±2℃ |
|
3 |
Atmospheric pressure |
70～106 |
kPa |
|
|
4 |
Storage and transport temperature |
-40～+70 |
℃ |
|
Ⅴ Electrical characteristics
|
1 Input characteristics |
|||||
|
No. |
Item |
Technical requirement |
Unit |
Remarks |
|
|
5.1.1 |
AC input voltage range |
85～300 |
Vac |
3000W (176V～286Vac) Linear derating (176Vac-90Vac) 1200W (90Vac) See derating curve of input voltage power in Section 1 of Item 6 for details. |
|
|
Rated input voltage |
220 |
||||
|
5.1.2 |
AC input voltage frequency |
45～63(rated 50 / 60) |
Hz |
|
|
|
5.1.3 |
Power factor |
≥0.99 |
|
Rated 220Vac input, 100% load |
|
|
≥0.98 |
|
Rated 220Vac input, 50% load |
|||
|
≥0.97 |
|
Rated 220Vac input, 30% load |
|||
|
5.1.4 |
Total harmonic of input current |
5% |
|
Rated 220Vac input, 100% load |
|
|
8% |
|
Rated 220Vac input, 50% load |
|||
|
12% |
|
Rated 220Vac input, 30% load |
|||
|
5.1.5 |
Maximum input current |
≤19 |
A |
||
|
5.1.6 |
Inrush current |
≤30 |
A |
||
|
5.1.7 |
AC input system |
Single-phase three wire input |
|
||
|
2 Output characteristic |
|||||
|
No. |
Item |
Technical requirement |
Unit |
Remarks |
|
|
5.2.1 |
Regulating range of output voltage |
42-58 |
Vdc |
Adjust output voltage by monitoring |
|
|
5.2.2 |
Rated output voltage |
57 |
Vdc |
|
|
|
5.2.3 |
Output current |
0-62.5 |
A |
48V～57.6V Limited power 3000W output 43.2V～48V Limited current 62.5A output See derating curve of limited output current in Section 3 of Item 6 for details. |
|
|
5.2.4 |
Efficiency |
≥96.5% |
|
220Vac, 50% load（57V/31A） |
|
|
≥95.5% |
|
40%～90% load |
|||
|
5.2.5 |
Temperature coefficient |
±0.02 |
%/℃ |
||
|
5.2.6 |
Output ripple and noise |
≤200 |
mVp-p |
Bandwidth≤20MHz |
|
|
5.2.7 |
Boot time |
3～10 |
S |
|
|
|
5.2.8 |
Output rise time |
200 |
mS |
The time output voltage rises from 10% of 57V to 90% under rated load. |
|
|
5.2.9 |
On / off overshoot amplitude |
≤±5 |
%Vo |
Rated input voltage, output full load. |
|
|
5.2.10 |
Dynamic response |
Overshoot amplitude |
≤ ±5 |
%Vo |
25%～50%, 50%～75% load change. The recovery time after the change of DC output voltage caused by step change of load shall not be greater than 200us, and its overshoot shall not exceed ± 5% of the set value of output voltage; The recovery time refers to the period of time when the change of DC output voltage rises to the point where it is greater than stabilized voltage precision, and then recovers to the point where it is less than or equal to and no longer exceeds stabilized voltage precision |
|
Recovery time |
≤ 200 |
µS |
|||
|
5.2.11 |
stabilized voltage precision |
≤±0.6%*Vo |
|
|
|
|
5.2.12 |
Current sharing unbalance |
≤±5% |
|
Within the load range of 50 ~ 100%, the load shall be divided equally in proportion |
|
|
5.2.13 |
Telephone weighing noise voltage |
≤2 |
mV |
|
|
|
5.2.14 |
Broadband noise voltage |
≤50 |
mV |
3.4～150KHz |
|
|
≤20 |
0.15～30000KHz |
||||
|
5.2.15 |
Discrete noise |
≤5 |
mV |
3.4～150KHz |
|
|
≤3 |
150～200KHz |
||||
|
≤2 |
200～500KHz |
||||
|
≤1 |
500～30000KHz |
||||
|
3 Alarm and protection characteristics |
|||||
|
NO. |
Item |
Technical requirements |
Unit |
Remarks |
|
|
5.3.1 |
Input undervoltage alarm |
95 |
Vac |
90Vac～150Vac Adjustable |
|
|
5.3.2 |
Input undervoltage protection |
90 |
Vac |
90Vac～156Vac Adjustable |
|
|
5.3.3 |
Input overvoltage alarm |
270 |
Vac |
265Vac～285Vac Adjustable |
|
|
5.3.4 |
Input overvoltage protection |
290 |
Vac |
270Vac～290Vac Adjustable |
|
|
5.3.5 |
Input AC high frequency alarm |
60 |
Hz |
51Hz～60Hz Adjustable |
|
|
5.3.6 |
Input AC low frequency alarm |
40 |
Hz |
40Hz～49Hz Adjustable |
|
|
5.3.7 |
Output undervoltage alarm |
35 |
V |
35V～39V Adjustable |
|
|
5.3.8 |
Output undervoltage protection |
34 |
V |
34V～38V Adjustable |
|
|
5.3.9 |
Output overvoltage alarm |
59 |
V |
53V～59V Adjustable |
|
|
5.3.10 |
Output overvoltage protection |
63 |
Vdc |
55V～63V Adjustable; In case of overpressure, the module restarts burping until the overpressure is eliminated |
|
|
5.3.11 |
Current-limit point |
62.5 |
A |
25～62.5A Adjustable |
|
|
5.3.12 |
Current-limit protection |
65±2; |
A |
|
|
|
5.3.13 |
Power-limit point |
3100 |
W |
1000W～3100W Adjustable |
|
|
5.3.14 |
Short circuit protection |
It can be short circuited for a long time and the power module will not be damaged. |
|||
|
5.3.15 |
Over temperature protection |
when internal temperature reaches 100 ℃, over temperature protection is on; recover at 90 ℃ |
|||
Ⅵ Derating curve
1 Derating curve of input voltage power
When input voltage 176V-290Vac Output 3000W; Input voltage 90Vac-176Vac linear derating;
(90Vac/1200W,115Vac/1673W,135Vac/2142W,150Vac/2455W)
Fig. 1 Derating curve of input voltage and power
2 Efficiency curve with rated voltage input
Fig.2 Efficiency curve
3 Ccurve of current limiting characteristic
The current limiting characteristic defines the characteristics of the output current limiting point of the module at a specific output voltage. When the output voltage is 48V-58V, the power supply system outputs in power limiting mode, with a maximum output power of 3000W. When the output voltage is 42V- 48V, it is output in current limiting mode, and the maximum current is 62.5A.
Fig.3 Curve of current limiting characteristic
Ⅶ Other requirements
|
No. |
Item |
Technical requirements |
Remarks |
|
1 |
Acoustic noise |
≤42dBa（sound pressure） |
A weighted, 1m test |
|
2 |
Odor |
Do not produce peculiar smell and smell harmful to health. |
|
|
3 |
Components |
The working temperature of all devices shall not belowe 105 ℃ |
|
|
4 |
Failure isolation |
Reliable isolation can be achieved after power module failure. |
The system bus voltage is not abnormal due to the failure of a single power supply. |
|
5 |
Parallel operation |
At least 4 power supplies shall be supported to work in parallel, and the load shall be evenly distributed in proportion (when the load is 50% ~ 100% of the rated output current), and its imbalance shall be better than ± 5% of the rated output current. When a power supply is abnormal, it will not affect the normal operation of the system. |
|
|
6 |
Heat dissipation |
Conduct the heat of the main heating devices to the shell for natural cooling and heat dissipation. |
|
Ⅷ Safety regulations and EMC characteristics
|
No. |
Item |
Standard (or test condition) |
Remarks |
||
|
1 |
dielectric strength |
Input—Output |
3000Vac/30mA/1min |
No breakdown or flashover It can be tested with equivalent DC voltage. |
|
|
Input - Ground |
1500Vac/30mA/1min |
||||
|
Output - Ground |
707Vdc/30mA/1min |
||||
|
2 |
Insulated resistance |
Input—Output |
≥10MΩ@500Vdc |
The ambient temperature is 15 ℃ ~ 35 ℃, the relative humidity is 90%, and the test DC voltage is 500V |
|
|
Input - Ground |
≥10MΩ@500Vdc |
||||
|
Output - Ground |
≥10MΩ@500Vdc |
||||
|
3 |
Contact current (input to ground) |
≤3.5mA |
Input 290Vac/60Hz |
||
|
4 |
Safety certification |
The final products are certified by TUV, CE and UL |
UL60950-1, EN60950-1 |
||
|
5 |
EMC requirements |
CE |
CLASS B (Ensure that the whole machine passes) |
EN55022 |
|
|
RE |
CLASS B (Ensure that the whole machine passes) |
EN55022 |
|||
|
SURGE |
IEC61000-4-5 LEVEL 4 Criterion B (Differential mode 4KV, common mode 4KV) |
||||
|
EFT |
IEC61000-4-4 LEVEL 3 Criterion B |
||||
|
DIP |
IEC61000-4-11 Drop to 70% UT for 100ms, drop at 0 °, 45 °, 90 °, 135 °, 180 °, 225 °, 270 ° and 315 °, meeting Criterion B; Drop to 40% UT for 20ms. All phases at 0 °, 45 °, 90 °, 135 °, 180 °, 225 °, 270 ° and 315 ° meet Criterion B; Drop to 0% UT for 10ms. All phases at 0 °, 45 °, 90 °, 135 °, 180 °, 225 °, 270 ° and 315 ° meet Criterion B; Other conditions meet Criterion B |
||||
|
ESD |
Shell, parts that can be touched by hands during normal operation: IEC61000-4-2, contact discharge + / - 6KV; Air discharge + / - 8KV Criterion B; (power on during test) |
||||
|
Shell, parts that can be touched by hands during normal operation: contact discharge + / - 8KV; Air discharge + / - 10KV Criterion R; (no power on during test) |
|||||
|
Conductor in signal interface: contact discharge + / - 2KV Criterion R; (power on during the test, and do not test the address line and equalizer) |
|||||
|
CS |
IEC61000-4-6 LEVEL 3 Criterion A. |
||||
|
RS |
IEC61000-4-3 LEVEL 3 Criterion A. |
||||
|
Voltage wave and flicker |
Pst<=1.0;P1t<=0.65;Relative steady-state voltage change dc<=3%; Maximum relative voltage variation dmax<=4%; The time when d(t) value of voltage change device exceeds 3% shall not be greater than 200mS |
IEC61000-3-3 |
|||
|
Current harmonic emission |
CLASS A |
IEC 61000-3-2 [6] |
|||
|
Immunity of Power frequency magnetic field |
LEVEL 3 A |
IEC61000-4-8 |
|||
Performance criteria:
Criterion A - normal performance within the scope of technical requirements;
Criterion B (DIP test criterion) - temporarily degraded or lost function and self recoverable performance;
Criterion B (other test criteria except DIP) - some functions can be degraded or lost temporarily and can be recovered automatically, but the output voltage should be kept within the normal range during the test;
Criterion C: automatic reset of short-time function interruption is allowed, and long-time function interruption or manual reset is not allowed;
Criterion R: damage to any device other than the protective device is not allowed, and the test piece can recover its performance after replacing the damaged protective device.
Ⅸ Indicator light and status description
Definition of outdoor integrated power panel indicator
|
Indication mark |
Indicator color |
Status |
Status description |
|
Operation indicator |
Green light |
Flashing every 1s |
Host; The power supply system works normally |
|
Flashing every 3s |
Slave; The power supply system works normally |
||
|
Protection indicator |
Yellow light |
Always on |
Output overvoltage and undervoltage alarm |
|
Output overcurrent alarm |
|||
|
Output over power alarm |
|||
|
Input overvoltage and undervoltage alarm |
|||
|
Input overcurrent alarm |
|||
|
Input over power alarm |
|||
|
Input AC frequency alarm |
|||
|
Input AC power failure |
|||
|
PSU high and low temperature alarm |
|||
|
Fault red indicator |
Red light |
Always on |
Output overvoltage and undervoltage protection |
|
Output overcurrent protection |
|||
|
Output over power protection |
|||
|
Short circuit protection |
|||
|
Input overvoltage and undervoltage protection |
|||
|
Input overcurrent protection |
|||
|
Input over-power protection |
|||
|
PSU high and low temperature protection |
|||
|
Input fuse broken |
|||
|
Input lightning protection failure |
|||
|
Output fuse broken |
|||
|
Output lightning protection failure |
Ⅹ Data of outdoor integrated power status
The background can read out the following data through CAN Bus:
Output voltage: 0 - 60VDC ± 1%
Output current: 0 - 62.5adc ± 0.5A
Ambient temperature: - 40 - + 120 ± 3 º C
Input voltage: 0 - 350vac ± 3.5vac (1%) at load > 5%
Module status: all alarms and fault alarms
Module serial number: 12 digits
Ⅺ Environmental test requirements
|
No. |
Item |
Technical requirements |
Remarks |
|
1 |
High temperature work |
55℃ |
The performance is normal in 24 hours |
|
2 |
Low temperature operation |
-40℃ |
The performance is normal in 24 hours |
|
3 |
High temperature storage |
70℃ |
Recover at normal temperature for two hours and work normally |
|
4 |
Low temperature storage |
-40℃ |
Recover at normal temperature for two hours and work normally |
|
5 |
Vibration Impact (collision) |
Operating environment: sinusoidal vibration: 5 ~ 9Hz; amplitude: 3.5mm; 9 ~ 200Hz: acceleration 10m/s2; 3 axial direction, sweep frequency vibration for 5 times in each direction |
Reference standard: ETS300019-2 |
|
Random vibration under transport conditions: 2 ~ 10Hz: 30m2/s3; 10~200Hz：3m2/s3; 200~500Hz：1m2/s3; 3 axial direction, 30min in each direction |
|||
|
6 |
drop High temperature work |
Operating environmental conditions: acceleration 250m/s2; Pulse width 6ms; 500 collisions in 3-axis and 6-direction |
|
|
Transport conditions: acceleration 400m/s2; Pulse width 6ms; 500 collisions in 3-axis and 6-direction |
|||
|
7 |
Low temperature operation |
Drop height 1m; Bottom surface once |
Ⅻ Mechanical characteristics and definition of connectors
1. Overall dimension (unit: mm)
width × depth × height=(300±0.5)mm×(400±0.5)mm×(65±0.5)mm
Fig.4 Overall dimension of structures of outdoor integrated power supply
2. Outline drawing of outdoor integrated power output connector and definition of PIN
Fig. 5 Outline of output connector and definition drawing of PIN
Table 1Output connector shape and definition of PIN
|
No. |
Interface specification |
Quantity |
Function |
|
1 |
Exhaust valve |
1PCS |
Ensure that the internal air pressure of the module is stable under high and low temperature |
|
2 |
AC three-core 40A waterproof connector |
1PCS |
AC input terminal, the maximum input current can reach 40A |
|
3 |
DC waterproof connector 100A |
1PCS |
Battery / parallel terminal |
|
4 |
DC two core 40A waterproof connector with fuse |
1PCS |
DC power output terminal, maximum output current 16A |
|
5-7 |
DC two core 40A waterproof connector with fuse |
3PCS |
DC power output terminal, maximum output current 40A |
|
8 |
DB9 waterproof signal connector |
1PCS |
Communication port, 9-core socket, parallel CAN communication and 485 communication interface of power battery |
|
9 |
DB15 waterproof signal connector |
1PCS |
Communication port, 15-core socket, 4-way dry contact output and 485 and CAN communication |
|
10 |
4G communication antenna base |
1PCS |
External 4G communication antenna |
|
11-14 |
Label position |
1PCS |
|
|
15 |
SIM card slot |
|
It is convenient to replace SIM card without opening the power shell |
|
16 |
indicator light |
|
Green / yellow / red indicator light, indicating normal operation, alarm and fault |
3. Definition of communication interface
The communication of outdoor integrated power supply adopts standard RS485 mode, and the information transmission mode is asynchronous mode. The North connector of monitoring unit adopts DB15 standard connector, and the specific PIN definition is shown in Table 2:
Fig.6 DB15 interface
Table 2 DB15 PIN definition
|
DB15Interface PIN |
Signal name |
Signal description |
|
1 |
SY_RS485+ |
SY485+ |
|
2 |
SY_RS485- |
SY485- |
|
3 |
ALM1+ |
Dry contact output 1 (reserved) |
|
4 |
ALM1- |
|
|
5 |
ALM2+ |
Dry contact output 2 (reserved) |
|
6 |
ALM2- |
|
|
7 |
ALM3+ |
Dry contact output 3 (reserved) |
|
8 |
ALM3- |
|
|
9 |
ALM4+ |
Dry contact output 4 (reserved) |
|
10 |
ALM4- |
|
|
11 |
— |
reserved |
|
12 |
BAT_RS485+ |
Battery 485 + (485 battery signal transmission in cascade) |
|
13 |
BAT_RS485- |
Battery 485 - (485 battery signal transmission in cascade) |
|
14 |
CAN+ |
Power CAN bus + (power cascade) |
|
15 |
CAN- |
Power CAN bus - (power cascade) |
The South connector of the monitoring unit adopts DB9 standard connector, and the specific PIN definition is shown in Table 3:
Fig. 7 DB9 interface
Table 3 DB9 PIN definition
|
DB9interface PIN |
Signal name |
Signal description |
|
1 |
BAT_RS485+ |
Battery 485 + (485 interface battery connection) |
|
2 |
BAT_RS485- |
Battery 485 - (485 interface battery connection) |
|
3 |
— |
reserved |
|
4 |
— |
reserved |
|
5 |
— |
reserved |
|
6 |
— |
reserved |
|
7 |
— |
reserved |
|
8 |
CAN+ |
CAN bus + (CAN interface battery connection) |
|
9 |
CAN- |
CAN bus - (CAN interface battery connection) |
4. Others
|
No. |
Item |
Requirements |
Remarks |
|
1 |
Installation mode |
Support wall hanging, pole flag assembly, pole paperback, angle steel, channel steel and other installation methods |
|
|
2 |
Grounding mode |
Connect to ground through two M6 grounding screw holes |
|
|
3 |
Enclosure material requirement |
aluminium |
The model of aluminum shell material: Al6061 |
|
4 |
weight |
|
|
|
5 |
colour |
|
ⅫI Packaging, transport and storage
1. Packing method
The outdoor integrated power supply is packaged and shipped separately.
2. Transport
It is suitable for vehicle, ship and aircraft transportation. During transportation, it shall be covered with sunscreen and loaded and unloaded in a civilized manner.
3. Storage
When the products are not in use, they should be stored in packing box. The ambient temperature of the warehouse is - 40 ℃ ~ + 70 ℃, and the relative humidity is less than 95%. Harmful gases, flammable and explosive products and corrosive chemicals are not allowed in the warehouse, and there is no strong mechanical vibration, impact and strong magnetic field. The packing box should be at least 20cm above the ground and at least 50cm away from the wall, heat source, window or air inlet, The storage period under specified conditions is generally 2 years, and the inspection shall be carried out again after more than 2 years.
XⅣ Reliability requirements
1. MTBF
(standard, ambient temperature and load requirements): according to the requirements for superior products of communication rectifier equipment specified by the Ministry of Posts and Telecommunications YD / T682-94, the mean time between failures of the module is ≥ 150000 H. The product has the ability to withstand sudden changes in external voltage and overheating.
2. Component selection
The components of famous brand manufacturers with stable quality shall be selected, the electrical stress and temperature stress of components shall be properly reduced, and anti-transient design shall be made for key components to ensure the reliability of components.
3. Thermal design
The outdoor integrated power supply adopts natural cooling to guide the heat of main heating devices to the shell, so as to reduce the rising temperature of components.
4. Environment resistant design
The product has strong adaptability to environment. The temperature and humidity can basically meet the storage requirements of all regions in China (- 40 ~ 70 ℃), the use requirements under simple protection (- 40 ~ 55 ℃), and can meet the storage and use requirements from cold climate to humid and hot climate.
5. Immunity to electromagnetic environment
Fully consider the complexity of power grid, improve the resistance of products to electromagnetic environmental interference, and reasonably use methods such as shielding, grounding and transient protection in the design to improve anti-interference ability.
XV Points for attention
This machine may have dangerous energy output. Do not touch it when it is working!
XⅥ Label
Return list
Hotline : 0755-86186110
