Temperature Rise Of The Manual Motor Starter - ABB MS116 Manual

2.2.7 Temperature rise of the manual motor starter

ABB tests the manual motor starters according to the Standard IEC 60947-1 table 2 and 3. This table indicates the
maximum temperature rise of the manual motor starters. Here you will find some example for the temperature rise:
Bare copper
Bare brass
Tin plated copper or brass
Silver plated or nickel-plated copper or brass
Other metals
a
result in higher terminals and internal part temperatures and such conductors should not be used without the
manufacturer's consent since higher temperatures could lead to equipment failure.
b
c
small dimensions, but not exceeding by more than 10 K the values of this table.
Manual operating means:
Metallic
Non-metallic
Parts intended to be touched but not hand-held:
Metallic
Non-metallic
Parts which need not be touched during normal operation b:
Exteriors of enclosures adjacent to cable entries:
Metallic
Non-metallic
Exterior of enclosures for resistors
Air issuing from ventilation openings of enclosures for resistors
A Different values may be prescribed by product standards for different test conditions and for devices of small dimensions but
not exceeding by more than 10 K the values of this table.
b The equipment shall be protected against contact with combustible materials or accidental contact with
personnel. The limit of 200 K may be exceeded if so stated by the manufacturer. Guarding and location to prevent danger is the re-
sponsibility of the installer. The manufacturer shall provide appropriate information, in accordance with 5.3.
APR I L 19
MA N UA L MOTOR START ER G UI D E
Terminal material
The use in service of connected conductors significantly smaller than those listed in Tables 9 and 10 could
Temperature-rise limits to be based on service experience or life tests but not to exceed 65 K.
Different values may be prescribed by product standards for different test conditions and for devices of
Table 4: Table 2 from IEC 60947-1 Temperature-rise limits of terminals
Accessible parts
Table 5: Table 3 from IEC 60947-1 Temperature-rise limits of accessible parts.
a, c
Temperature-rise limits
in Kelvin [K]
60
65
65
70
b
Temperature-rise limits
in Kelvin [K]
15
20
30
40
40
50
200b
200b
a
19 /80