Table of Contents
Advertisement
Annex A
Annex A
A.1
Overload characteristic
Release time [s]
300
250
200
150
100
50
30
105
On exceeding a load of 105% the overload integrator starts. When falling below the inte-
grator counts backwards. If the integrator achieves the overload characteristic, the error
E.OL is triggered.
A.2
Calculation of the motor voltage
The motor voltage for dimensioning of the drive is depending on the used components. The
mains voltage reduces according to the following table:
Mains choke Uk
Inverter open loop
Inverter closed loop
Motor choke Uk
Non-rigid supply sy-
stem
A.3
Maintenance
All work may only be done by qualified personnel. The security must be ensured as fol-
lows:
•
Disconnect power supply at MCCB
•
Secure against restarting
•
Await discharge time of capacitors (if necessary controlling by measurement at „+PA"
and „-", respectively "++" and „--")
•
Ensure loss of voltage by measurement
In order to avoid premature ageing and avoidable malfunctions, the measures mentioned
110
120
130
140
4 %
4 %
8 %
1 %
2 %
160
150
170
180
Example:
Closed loop inverter with mains- and motor choke at
non-rigid supply system:
400 V mains voltage - 15 % = 340 V motor voltage
210
220
190
200
Load [%]
GB - 35
Hide quick links:
Advertisement
Table of Contents
