中文版
Description
Overload Curves
The curves can take one of three formats:
standard, custom, or voltage dependent. For all
curve styles, the 469 retains thermal memory
in a thermal capacity used register which
is updated every 0.1 second. The overload
pickup determines where the running overload
curve begins.
The 469 standard overload curves are of
standard shape with a multiplier value of 1 to 15.
The voltage dependent overload curves are
used in high inertia load applications, where
motor acceleration time can actually exceed
the safe stall time and motor thermal limits.
During motor acceleration, the programmed
thermal overload curve is dynamically adjusted
with reference to the system voltage level. The
selection of the overload curve type and the
shape is based on motor thermal limit curves
provided by motor vendor.
469-P5-LO-A20
Protection and Control
The 469 is a digital motor protection system
designed to protect and manage medium and
large motors and driven equipment. It contains
a full range of selectively enabled, self contained
protection and control elements as detailed in
the Functional Block Diagram and Features table.
Motor Thermal Model
The primary protective function of the 469 is the
thermal model with six key elements:
• Overload Curves
• Unbalance Biasing
• Hot/Cold Safe Stall Ratio
• Motor Cooling Time Constants
• Start Inhibit and Emergency Restart
• RTD Biasing
Please contact Sunny sales@xiongbagk.cn for the best price.
➱ sales manager: Sunny
➱ email mailto: sales@xiongbagk.cn
➱ Skype/WeChat: 18059884797
➱ phone/Whatsapp: + 86 18059884797
➱ QQ: 3095989363
➱ Website:www.sauldcs.com
