Thailand TIS 92-2536 IS: 555-1979 (1993) for Table IS: 1169-1967 type and Wall Amd. 1980 type B.S. 367:1969, TIS 127-2536 IEC 176: 1966 and (1993) for IS : 374-1966 Pedestal type AS 2071: 1984 and TIS 205-2530 IEC 342:1971 (1987) for IS: 2312-1967 Ceiling type TIS 572-2528 (1985) for type TIS 710-2530 (1987) for Ventilating type Vietnam TCVN 7827:007 IEC 60879 Almost identical to IEC Based on CLASP online, Javed et al (2012) A comparison of the underlying ambient conditions for testing in each country reveals many similarities, which is not surprising as most are essentially following the IEC standard, including Vietnam (Table 4). The only minor variation observed in Vietnam is the absence of an ambient temperature requirement (i.e. 20oC ±5oC). : Test conditions of laboratories for performance measurement IEC 60879 Conditions Values China Pakistan Thailand Vietnam Clause As per 9.3.1 Test voltage standard As per 9.3.2 Test frequency standard 9.3.3 Voltage variation +/- 1% Not 9.3.4 Ambient temperature 20 +/- 5°C specified 9.4.1 Test chamber, fan height, (Ceiling/ testing instrument/ As per Not as deck head apparatus arrangement standard per IEC type fans) and test procedures 60879 9.4.2 Test chamber, testing (Table/ instrument, apparatus As per cabin and arrangement and test standard pedestal procedures fans) As per 9.5 Speed measurement standard As per 9.6 factor measurement standard Source: Javed et al (2012) Potential for harmonisation and amending the testing standard Since the Vietnamese testing standard (TCVN 7827: 2007) and most other regional neighbours, already follows the IEC testing standard (IEC 60879: 1986) the only requirement to improve harmonisation is to include the following test condition in TCVN 7827:
Thailand TIS 92-2536 (1993) for Table type and Wall type TIS 127-2536 (1993) for Pedestal type TIS 205-2530 (1987) for Ceiling type TIS 572-2528 (1985) for type TIS 710-2530 (1987) for Ventilating type IS: 555-1979 IS: 1169-1967 Amd. 1980 B.S. 367:1969, IEC 176: 1966 and IS : 374-1966 AS 2071: 1984 and IEC 342:1971 IS: 2312-1967 Vietnam TCVN 7827:007 IEC 60879 Almost identical to IEC Based on CLASP online, Javed et al (2012) A comparison of the underlying ambient conditions for testing in each country reveals many similarities, which is not surprising as most are essentially following the IEC standard, including Vietnam (Table 4). The only minor variation observed in Vietnam is the absence of an ambient temperature requirement (i.e. 20oC ±5oC). : Test conditions of laboratories for performance measurement IEC 60879 Clause Conditions Values China Pakistan Thailand Vietnam 9.3.1 Test voltage As per standard Not as per IEC 60879 9.3.2 Test frequency As per standard 9.3.3 Voltage variation +/- 1% 9.3.4 Ambient temperature 20 +/- 5°C Not specified 9.4.1 (Ceiling/ deck head type fans) Test chamber, fan height, testing instrument/ apparatus arrangement and test procedures As per standard 9.4.2 (Table/ cabin and pedestal fans) Test chamber, testing instrument, apparatus arrangement and test procedures As per standard 9.5 Speed measurement As per standard 9.6 factor measurement As per standard Source: Javed et al (2012) Potential for harmonisation and amending the testing standard Since the Vietnamese testing standard (TCVN 7827: 2007) and most other regional neighbours, already follows the IEC testing standard (IEC 60879: 1986) the only requirement to improve harmonisation is to include the following test condition in TCVN 7827: