Where:
• t
amb
= Measured (set) ambient temperature (can be set in
̊
C or
̊
F)
• t
max
= Maximum temperature (can be set in
̊
C or
̊
F) for the protected object
• k
max
= Ambient temperature correction factor for the maximum temperature
• t
min
= Minimum temperature (can be set in
̊
C or
̊
F) for the protected object
• k
min
= Ambient temperature correction factor for the minimum temperature
• t
ref
= Ambient temperature reference (can be set in
̊
C or
̊
F, the temperature in which
the manufacturer's temperature presumptions apply, the temperature correction factor is 1.0)
Figure. 5.4.28 - 142. Ambient temperature coefficient calculation (a three-point linear approximation and a settable correction
curve).
Function inputs and outputs
The blocking signal and the setting group selection control the operating characteristics of the function
during normal operation, i.e. the user or user-defined logic can change function parameters while the
function is running.
A
AQ
Q-M257
-M257
Instruction manual
Version: 2.07
© Arcteq Relays Ltd
IM00021
275
Summary of Contents for AQ-M257
Page 1: ...AQ M257 Motor protection IED Instruction manual...
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