156
E300 Installation and Commissioning Guide
Issue Number: 1
Figure 7-21 Advanced door opening
7.19 Emergency backup power supply control
In order to prevent a UPS system from being overloaded during emergency back up operation, there are two features within the software which will
control both the current limit and speed to limit the output power demand from the UPS. The UPS protection requires the user to enter the UPS power
rating into
UPS Maximum Power Set point
(
O06
). The protection then uses this value as the maximum power allowed and compares this with the
actual drive output power.
When
UPS Control Enable
(
O05
) = On (1), UPS control is has been enabled using a digital input from the Elevator controller routed to the UPS
control enable parameter. When the UPS control enable is active, the following functions are internally controlled to reduce the loading on the UPS
and extending the operating time:-
•
UPS maximum power setpoint
•
Symmetrical current limit
•
Start optimizer is disabled
•
Start position lock is disabled
•
Load measurement is disabled
•
Maximum speed error threshold is disabled
•
Maximum distance error threshold is disabled
To protect the UPS from overloading and switching into standby mode, the DC bus voltage control of
Symmetrical Current Limit
(
B16
)
is carried out
with the UPS control.
Where the DC bus voltage drops below the UU Reset v 60 V (= 510 Vdc for 400 Vac drives), the current limit is decreased linearly from the
nominal set value in
UPS evacuation current full load limit
(
O07
) to the reduced value in
UPS evacuation current no load limit
(
O08
) with the redcution
in voltage to 450 Vdc.
The speed is also controlled to prevent exceeding the power set point in
UPS Maximum Power Set point
(
O06
) in kW. When the output power is >
UPS maximum power set point, the speed reference will be internally set to 0.
Table 7-35 UPS power control parameter
Advanced door
opening speed
Advanced door opening status
Advanced door opening invert
Velocity Threshold 1
(
)
H13
Parameter
Detail
Ups Control Enable
(
O05
)
Enable, disable for UPS control
UPS Maximum Power Set
point
(
O06
)
Maximum UPS power in kW. This setting prevents the UPS from being overloaded during emergency evacuation with
UPS control enable = On (1).
UPS evacuation current full
load limit
(
O07
)
Defines the percentage full load current allowed during emergency evacuation with UPS control enable = On (1) to
prevent overloading, and to extend the operating time of the UPS power supply.
UPS evacuation current no
load limit
(
O08
)
Defines the percentage no load current allowed during emergency evacuation with UPS control enable = On (1) to
prevent overloading, and to extend the operating time of the UPS power supply.
Содержание E300 Series
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