BENSHAW RSi GM2 Series, Инструкция по эксплуатации

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Learning Protection Features
GM2 Series VFD
167
890054-00-00
Dynamic Braking (DB) Configuration
The braking transistor (IGBT) and monitoring/control circuit is integrated inside the inverter. A
brake resistor is connected externally to the inverter. See Section 11.5 for Brake Resistor
Specifications. The standard for braking torque is 150% at a working rate, Pr.66 of 5% (%ED or duty
cycle). If the Pr.66 %ED is increased to 10%, the rated capacity (W) of the brake resistor must be
doubled.
An output relay can be used to provide a warning when the duty cycle (%ED) has been exceeded.
Set OU.31 or OU.33 to 31 (DB Warn %ED).
Group Code Name Setting Setting Range Unit
Pr
66
DB resistor %ED
and warning level
10 0 – 30 %
OU
31
Multi-function
(digital) relay1 item
31 DB Warn%ED - -
33
Multi-function
(digital) relay2 item
Dynamic Breaking Resistor Setting Details
Code and
Features
Description
Pr.66 DB
Warn%ED
Set the Enable Duty (%ED). This sets the rate at which the
braking resistor operates for one operation cycle. If the Enable
Duty (%ED) is set to 0%, braking can be used without
restriction. However, precaution is necessary as there is a risk
of the inverter tripping and/or over heating of the resistor.
The maximum time for continuous braking is 15 secs. and turns
off after the 15 sec period has expired. The time when the next
braking cycle is available (after the 15 seconds continuous) is
calculated as below.