GB 15579.2-2014Arc welding equipment -- Part 2: Liquid cooling systems (English PDF)

5.1 Test conditions

Shall comply with the provisions of 5.1 GB 15579.1-2013.

Independent external liquid cooling system can not be tested welding power supply.

Built-in liquid cooling system shall be tested together with the welding power source.

5.2 Measuring Instruments

Measuring instrument accuracy or precision requirements.

a) electrical measuring instruments. 0.5 (± 0.5% of full scale), insulation resistance and dielectric strength measurement exceptions for measuring insulation Precision resistance and dielectric strength of the instrument does not require, but shall be tested for accuracy problems;

b) temperature measurement devices. ± 2K;

c) pressure measuring instruments. 2.5;

d) flow measurement instruments. 2.5.

Compliance 5.3 components GB 5.3 shall comply with the provisions of 15579.1-2013.

5.4 Type inspection

Unless otherwise specified, all type of inspection should be carried out under the same cooling system.

Type test according to the following order.

a) general visual inspection (see GB 15579.1-2013 3.7);

b) Enclosure protection (see GB 15579.1-2013 6.2.1);

c) mechanical requirements (see Chapter 7);

d) Insulation resistance (see 6.1.4);

e) Dielectric strength (see 6.1.5).

Above in this section may be other tests that are not mentioned in any convenient order.

5.5 Routine Tests

Each cooling system should be followed by the following routine tests.

a) general visual inspection (see GB 15579.1-2013 3.7);

b) protection circuit continuity (see GB 15579.1-2013 10.4.2);

c) Dielectric strength (see 6.1.5);

d) general visual inspection (see 3.7 GB 15579.1-2013, such as liquid leakage inspection and checks the traffic regulations according to the manufacturer's Action or pressure sensor).

6.1 Overview

6.1.1 General

GB 6.1.1 shall comply with the provisions of 15579.1-2013.

6.1.2 CLEARANCE

GB 6.1.2 shall comply with the provisions of 15579.1-2013.

6.1.3 Creepage distance

GB 6.1.3 shall comply with the provisions of 15579.1-2013.

6.1.4 Insulation resistance

GB 6.1.4 shall comply with the provisions of 15579.1-2013.

Test may be carried out when impassable coolant.

6.1.5 Dielectric strength

GB 6.1.5 shall comply with the provisions of 15579.1-2013.

Test may be carried out when impassable coolant.

6.2 Normal use protection against electric shock (direct contact)

GB 6.2 shall comply with the provisions of 15579.1-2013.

Protection against electric shock (non-direct contact) 6.3 when the accident occurred

6.3.1 Protective measures

GB 6.3.1 shall comply with the provisions of 15579.1-2013.

6.3.2 Input isolation circuit and the welding circuit

GB 6.3.2 shall comply with the provisions of 15579.1-2013.

6.3.3 Input circuit winding insulation and welding circuit between the windings

GB 6.3.3 shall comply with the provisions of 15579.1-2013.

6.3.4 Internal conductors and connections

GB 6.3.4 shall comply with the provisions of 15579.1-2013.

6.3.5 Primary leakage current

GB 6.3.7 shall comply with the provisions of 15579.1-2013.

Connecting 6.4 Power supply Chapter 10 should be consistent with GB 15579.1-2013 provisions.

In addition, the power supply of 125V, rated current plug shall not be less than 70% of the input current, measured the fan motor or pump set in the stall state, the measured value, whichever is higher.

6.5 Welding circuit leakage current between the protective earth

According to the manufacturer's instructions in the liquid cooling system, fill the coolant [see 12.1e)], between the torch and protective earthing system of cooling DC leakage current should not exceed 10mA.

Torch design structure will affect the leakage current value, therefore, compliance checks should be used when conventional analog brass torch.

Compliance check. at room temperature, in the protection of ground and through a hose length of not more than 0.5m and cooling systems connected to the brass Applying a direct current of 500V (analog torch) between the test, see Figure 1. The minimum diameter of the hose is 5mm. It should not be shorter than the length of copper pipe 10cm, the minimum inner diameter of 5mm. During the test, the cooling system should be filled and simulation torch coolant pump should run correctly.

Explanation.

1 --- liquid cooling system;

2 --- hose;

3 --- brass.

Figure 1 Measurement of leakage current structural layout

7.1 Basic requirements

Chapter 14 should be consistent with GB 15579.1-2013 provisions.

During the test, the cooling system should be filling coolant.

7.2 Coolant overflow

When filling in accordance with the manufacturer's coolant spilled liquid should not cause electric shock.

Compliance check. a container filled with a liquid coolant, and then 15% of the container capacity of the cooling liquid coolant or 0.25L (both Whichever is the greatest) in not more than 60s time continuously into the container. Then, immediately between the input circuit and the conductive member exposed by 6.1.5 dielectric strength test, the cooling system should be able to withstand the test.

7.3 Hose couplings and hose connections

If the hose connecting means coupling device or hoses require frequent removal and placed on top of or close to live parts live parts bit Set these live parts shall be protected by splash-proof housing, drains or other suitable means. Except the welding circuit live parts.

8.2 Thermal performance requirements

8.2.1 Heating test

Liquid cooling system should be able to work properly without causing any member exceeding its rated temperature at rated cooling power.

Compliance Check. Press the Chapter 10 requirements.

8.2.2 Tolerance test parameters

a) p Pressure. p 10% -2%

b) qV Flow. qV

c) T temperature. T ± 2K

8.2.3 Test duration of fever

GB 7.1.3 shall comply with the provisions of 15579.1-2013.

8.3 Pressure and temperature

Maximum pressure and coolant temperature is 70 °C, the liquid cooling system should work without leakage.

Compliance check. After the heating test immediately blocked coolant outlet of the cooling system, the cooling system to run 120s or to protect the system from Turn off automatically.

9.1 General requirements

Cooling System 9.2 under operating conditions should not be electrical breakdown or fire hazard. When these tests do not take into account any part reached Temperature, and the cooling system is able to continuously work properly. The only requirement is that the cooling system should not become unsafe. These tests it may be performed on other cooling systems.

For the cooling system with a protective device (such as circuit breakers and thermal protection), and if the protective device in the cooling system unsafe Factors before action should be considered to achieve this requirement.

Compliance check.

a) At the bottom of the cooling system put a layer of dry absorbent cotton, extend the cooling system each side 150mm.

b) cooling system started from cold, according to the requirements of 9.2.

c) During the test the cooling system does not appear flames, molten metal, or other material to ignite absorbent cotton phenomenon.

d) After the test within 5min cooling system should be able to withstand the dielectric strength test 6.1.5.

9.2 Stall test

By cooling fan or pump to achieve the required cooling system 8.2, the next generation of the maximum heat output 8.2.1 condition fan or pump blocked Turn, the cooling system runs 4h at rated input voltage or a rated load speed.

NOTE. The purpose of this test is to test the cooling system running under the fan stationary condition. The fan should not be connected to a mechanical or stall.

10.1 Test Procedure

Shall be given an ambient temperature of 25 °C (see 8.2.2 test parameter tolerance), the coolant flow is 1L/min, 100% duty cycle Cooling power value (the coolant recommended by the manufacturer), expressed as kW.

The test shall be performed on a separate cooling system.

Built-in liquid cooling system may be supplied with welding power heating. In this case, the test shall be welded together into power Line, and should be in the welding power supply is at the maximum heating situation.

Compliance check.

a) a liquid cooling system is recommended by the manufacturer's instructions and fill in the amount of category Fill the Coolant;

b) a liquid cooling system should be connected to the test circuit in accordance with FIG. 2;

c) adjusting the flow rate of coolant 1L/min ± 0.1L/min;

d) adjusting the electrical heater so that the liquid cooling system inlet temperature above ambient temperature 40K ± 2K;

e) direct measurement of the liquid cooling system of the inlet and outlet temperature, should minimize heat loss test apparatus;

f) the duration of the test is not less than 60min, and to a liquid cooling system temperature does not exceed 2K h time/date.

Cooling power calculated by the following formula.

P = (T1-T2) qmC qm = qVrho where.

P --- cooling power, kW;

T1 --- liquid inlet temperature, K;

T2 --- liquid temperature at the outlet, K;

Temperature difference T1-T2 ---, K;

--- of qm medium flow, kg/s;

--- qV volume flow, L/s;

C --- heat capacity (see Table 1), kJ/(kg · K);

p --- coolant density (see Table 1), kg/L.

Explanation.

1 --- liquid cooling system; 4 --- thermometer (T2); 7 --- electric heater;

2 --- liquid inlet; 5 --- regulating valve; 8 --- thermometer (T1).

3 --- liquid outlet; 6 --- flowmeter;

2 a cooling power test circuit of FIG.

Table 1 Coolant state index at 60 °C

liquid

Heat capacity C

kJ/(kg · K)

Density rho

kg/L

Water/ethanol (50/50) 3.85 0.88 Water/glycol (50/50) 3.44 1.07 Water/propylene glycol (50/50) 3.69 1.04 Water/glycol (10/90) 2.670 1.10 Water/propylene glycol (10/90) 2.846 1.02 Note. Figures in brackets in the first column volume ratio.

11.1 Basic requirements

GB 15579.1-2013 shall comply with the provisions of Chapter 15.

11.2 Description

Plate should be divided into three parts.

a) flag independent external liquid cooling system;

b) energy independent external liquid cooling system input;

c) a liquid cooling system.

Order data should be as shown in Figure 3 (see example in Appendix B) will be shown in principle.

Plate size is not specified, you can choose.

Note. If desired, you can give additional information on the dedicated nameplate. Some useful technical information can be incorporated into the manufacturer's technical documentation, see Chapter 12.

For internal liquid cooling system, Figure 3 c) should be added to the contents of the welding power supply nameplate, see the GB 15579.1-2013 Chapter 15.

a) Sign

twenty three)

b) energy input

5) 6) 7)

8) 9), if any

c) a liquid cooling system

10) 11) 12)

3 stand-alone liquid cooling system nameplate diagram consisting principle

11.3 Content

a) Sign

No. 1) manufacturer's name and address and, if necessary, gives sellers, importers, trademark name and country of origin no. 2) model given by the manufacturer (marker) no. 3) design and manufacturing information (such as serial number) no. 4) number of this standard part of the cooling system in order to confirm compliance with this requirement

b) energy input

No. 5) Power supply symbol no. 6) U1V/1 (3) ~ Hz rated supply voltage, number of phases (such as single-phase or three-phase), and the amount of alternating current symbol ~ Fixed frequency (eg 50Hz or 60Hz) no. 7) I1maxA maximum rated input current no. 8) IP protection class, such as IP21S or IP23S no. 9) II class protection symbol (if applicable)

c) a liquid cooling system no. 10) was cooled symbol no. 11) P1L/minkW temperature is 25 °C, coolant flow is the rated cooling power 1L/min when no. 12) pmaxPa (bar) rated maximum pressure Compliance check. visual and data checking.

11.4 Tolerance

The manufacturer shall devices and precision control of the cooling system to meet the nameplate tolerance specified value.

a) P cooling power, kW, not less than the value specified on the nameplate;

b) pmax rated maximum pressure, Pa (bar), can not exceed the value of nameplate.

Compliance check. comparison of data.

13.1 Universal identification

GB 15579.1-2013 shall comply with the provisions of 17.2.

13.2 Inlet and outlet

At the inlet and outlet of the coolant should be clear, easy to wear identification.

a) imports.

b) export.

In addition, the use of color identification.

13.3 Pressure Warning

If the maximum pressure of the liquid cooling system is higher than 0.5MPa (5bar), shall be accompanied by a warning symbol.

Appendix A

(Informative)

A schematic view of a built-in liquid cooling system and independent external liquid cooling system Explanation.

1 --- coolant tank; 6 --- welding circuit;

2 --- heat exchanger; 7 --- welding transformer;

3 --- pump; 8 --- transformer;

4 --- grounded cooling pipe;. 9 --- contact tip.

5 --- torch;

Figure A.1 built-in liquid cooling system diagram

Explanation.

1 --- coolant tank; 5 --- torch;

2 --- heat exchanger; 6 --- welding circuit;

3 --- pump;. 9 --- contact tip.

4 --- grounded cooling duct;

Figure A.2 independent external liquid cooling system diagram

Appendix B

(Informative)

Plate example independent external liquid cooling system

a) Sign

1) Manufacturer

Address trademark

2) Model 3) Serial number

4) GB 15579.2

b) energy input

5) 6) U1 = 220V/1 ~ 50Hz 7) I1max = 1.2A

8) IP23S 9) -

c) a liquid cooling system

11) P1L/min = 0.55kW 12) pmax = 0.38MPa