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Appendix 5
Motor data enquiry
form
Data needed to determine motor protection settings
System data
Ambient temperature t
amb
=
°
C
Cooling arrangements & systems:
totally enclosed (rib cooling)
heat exchanger
....................................................
Cooling time coefficient k
c
=
CT current ratio
/ A
Block transformer ratio / kV
Note! If a block transformer is used, the
ratio of this transformer must also be noted!
Network earth-fault current
when fully developed (100%)
A
Type of load.......................................
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Motor data
Type or construction of motor............
.................................................................
Rated power P
nm
=
kW
Rated voltage U
nm
=
V
Rated current I
nm
=
A
Start-up arrangement:
direct on line
transformer
reactance
Starting current I
s
=
x I
nm
Actual starting time t
s
=
s
Max. start/stall time permitted
- from a cold condition =
s
- from a hot condition =
s
Required number of
cold / hot starts ___ ___
Special remarks & requirements
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The items marked with bold letters are completely essential to make it
possible to work out settings for the motor thermal and start-up protection.
Summary of Contents for SPAM 150 C
Page 1: ...SPAM 150 C Application examples Technical information ...
Page 23: ...23 ...
