Annex A; Overload Characteristic; Calculation Of The Motor Voltage; Maintenance - KEB Combivert F5 Installationsanleitung

Annex A

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. Error E.OL is triggered if the integrator achieves the overload
characteristic.
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 system
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
below must be carried out in the appropriate cycle.
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 - 39