MSI EC14H Instruções de Operação descarregar pdf (Página 38)

Issue Date: 2003-09-25 Page 38 of 42 Report Reference #

E203413-A17-CB-1

IEC 60950

Clause Requirement + Test Result - Remark Verdict

TRF No.: 1950__F UL International Demko A/S TRF originator: FIMKO

4.5 TABLE: temperature rise measurements Pass

test voltage (V) ................................................. :

63 HZ,

90 Vac, 2.5hrs, Horizontal / 254

Vac, 2.5hrs, Horizontal / 90

Vac, 2hrs, Vertical / 254 Vac,

2hrs, Vertical

—

t1 (°C) ............................................................. :

—

t2 (°C) ............................................................. :

Ambient = 25.7 / 24.5 / 25.3 /

25.0 degree C

—

temperature rise dT of part/at: dT (K) required dT (K)

C1 body (power unit) 37.2 / 42.6 / 36.7 /

41.2

L1 coil (power unit) 34.5 / 40.0 / 34.0 /

38.5

T1 coil (power unit) 39.5 / 45.5 / 38.6 /

43.7

T1 core (power unit) 39.7 / 46.0 / 38.9 /

44.2

PWB near IC1 (power unit) 33.3 / 37.5 / 32.7 /

35.9

LX coil (power unit) 35.6 /40.0 / 34.6 /

38.0

T1 coil 26.0 /29.7 / 26.0 /

28.5

Enclosure inside 15.0 /17.8 / 14.5 /

15.9

Enclosure outside 9.9 / 11.6 / 9.4 / 10.0 40

temperature rise dT of winding:

(Ω) R

( Ω)

dT (K)

required dT

(K)

insulation

class

-- -- -- -- -- --

supplementary information:

Maximum normal load: Connect to computer and transmit data continuously.

Tmra = 40 degree C, the maximum temperature rise is calculated as follows:

Winding components:Transformer - Class A: dTmax = 75K - 10K-(40-25)K = 50 K

Winding components:Transformer - Class B: dTmax = 95K - 10K-(40-25)K = 70 K

Components with:

- maximum absolute temp. of 105 degree C (PWB): dTmax = (105-40)K = 65 K

- when no class of insulation is given, minimum insulation 105 degree C assumed.

- maximum absolute temp. of 80 degree C (Enclosure): dTmax = (80-40)K = 40 K

User Accessible Area:

- material is plastic (70K) dTmx = 70K-(40-25)K = 55K

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 89 90

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