System Protection; Asd Protection - Toshiba Q9 Installation And Operation Manual

System Protection

The Q9 F
overload/over-current damage and from the undesirable effects of under-voltage operation. Because of
the different types of over-current conditions that may occur (i.e., inrush current, short circuit current,
extended overloads, etc.), the Q9 F
current and running over-current damage. Both protection mechanisms require an application-specific
adjustment for performance optimization and the minimization of nuisance tripping.
There are two system operating modes: Q9 F
is being driven by the ASD, the primary over-current protection and extended overload protection for
the ASD is accomplished via the Electronic Thermal Protection setting of the ASD. This parameter
should be set to the FLA of the motor.
The power unit of the Q9 F
bypass circuit is rated for 100,000 Amps Interrupting Capacity.
Overload protection for the Bypass mode of operation is accomplished via the Motor Circuit
Protector shown on
schematically in

ASD Protection

The Q9 F
requirements (Typeforms). Each typeform is designed to operate at 100% output continuously and can
operate at 110% for up to 60 seconds. A trip will be incurred if the design specifications are exceeded
for a given typeform. Greater than 110% overload will have an inverse affect on the overload time
allowed.
ASD overload protection is accomplished via the ASD software which can be configured to disable the
system in the event of an overload. Using the Electronic Thermal Protection setting, the ASD may be
properly matched to the motor being driven and to the application.
The short-circuit protection, which is provided by hardware and software, disables the system in the
event of a fault.
The installer is to provide input fuses for the 230-volt Q9 F
Q9 F
LOW
When connecting two or more drive systems to the same power line as shown in
necessary to select a circuit-breaking configuration that will ensure that if a short circuit occurs in
system 1, only MCCB2 trips, not MCCB1. If it is not feasible to use this configuration, insert a fuse
between MCCB2 and system 1.
Figure 2. Circuit breaker configuration.
Read and understand all safety warnings before operating this equipment!
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S has protection features that are designed to protect the ASD and the motor from
LOW AVER
LOW
S
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pg. 16 and the Overload Circuit Protector shown on
Figure 7 on pg. 29).
S is designed and manufactured to accommodate a wide range of voltage and current
LOW AVER
S ASDs are equipped with internal primary power input fuses as a standard feature.
AVER
S is equipped to protect the system from start-up over-
AVER
S -driven and Bypass operation. When the motor
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is rated for 100,000 Amps Interrupting Capacity (AIC). The
S
LOW AVER
Q9 FlowSaver Installation and Operation Manual
pg. 17 (both shown
ASDs. The 460-volt
Figure 2, it will be