6
Safety Considerations
Safety Manual
MN042004EN March 2017 www.eaton.com
The C445 will issue a control fault when:
•
The RunSlow or RunFast command is active and phase volt-
age is present and no phase current is detected.
•
A Stop command is active and current is detected.
ote:
N
Even with the control fault disabled, after de-activating the pres-
ent speed, the C445 will NOT transition to the new speed until current
readings decrease to zero.
•
Outputs 1 and 2 will be de-activated anytime the C445 expe-
riences a fault/inhibit condition.
•
Output 1 – slow starter coil (NO)
•
Output 2 – fast starter coil (NO)
•
Output 3 – open for user configuration and their function can
be selected by the user.
The AtRef (At Reference) bit in the Motor Control Status regis-
ter is set based on the following two conditions. At Reference
signals that the motor is up to speed.
1. If motor current first exceeds 115% of the active overload
FLA rating and then decreases back below 115% of the
active overload FLA rating, it is determined the motor has
come up to speed and the AtRef bit will be set.
2. If motor current exceed s 30% of the active overload FLA
rating and remains until after the Motor State Transition to
Run Delay from Start time expires the motor is determined
to be up to speed and the AtRef bit will be set.
Two Speed Dahlander Operation Mode
The Two Speed Dahlander motor starter operation mode
accepts off/slow/fast commands to control two speed motor
applications. A run slow command will activate Output 1(slow).
A run fast command will activate Output 3(net). Then after the
Network Contactor Delay time expires, Output 2(fast) activates
starting the motor on the fast winding. A stop command de-
activates all 3 outputs.
When transitioning from fast -> slow, the C445 will de-activate
both Output 2(fast) and Output 3(net) and will delay activating
Output 1(slow) until the Control Switching Time Delay expires
allowing the motor time to slow down before transitioning to
the slow speed.
The C445 will issue a control fault when:
•
The RunSlow or RunFast command is active and phase volt-
age is present and no phase current is detected.
•
A Stop command is active and current is detected.
ote:
N
Even with the control fault disabled, after de-activating the pres-
ent speed, the C445 will NOT transition to the new speed until current
readings decrease to zero.
•
Outputs 1, 2 and 3 will be de-activated anytime the C445
experiences a fault/inhibit condition.
•
Output 1 – slow starter coil (NO)
•
Output 2 – fast starter coil (NO)
•
Output 3 – net starter coil (NO)
The AtRef (At Reference) bit in the Motor Control Status regis-
ter is set based on the following two conditions. At Reference
signals that the motor is up to speed.
1. If motor current first exceeds 115% of the active overload
FLA rating and then decreases back below 115% of the
active overload FLA rating, it is determined the motor has
come up to speed and the AtRef bit will be set.
2. IF motor current exceeds 30% of the active overload FLA
rating and remains until after the Motor State Transition to
Run Delay from Start time expires the motor is determined
to be up to speed and the AtRef bit will be set.
Auto Transformer Operation Mode
The auto transformer reduced voltage motor starter profile
accepts start/stop commands to control motors wired in a
reduced voltage auto transformer configuration. When a start
command is received Output 3(star) will be activated. Then
after the Network Contactor Delay time expires, Output 1(start)
activates starting the motor with the reduced voltage from the
auto transformer. When the C445 detects the motor is up to
speed or the Maximum Star Winding Time expires, whichever
occurs first, the Network Contactor Delay timer is started and
Output 3 is de-activated. After the Network Contactor Delay
time expires, Output 2(run) also activates, which transitions the
transformer to full voltage. After a second Network Contactor
Delay time expires, Output 1(start) de-activates placing the con-
trol into full voltage run mode.
