Dielectric Testing; Insulation Measurement - KEB COMBIVERT F5 Reference Manual

Dielectric Testing

1.1.2. Dielectric Testing

1.1.3. Insulation Measurement

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The KEB Elevator drive is dielectric tested after assembly as part of the
factory end test routine. This dielectric test is harmonized and in accordance
with the requirements set forth in UL 508C, CSA C22.2 No. 274-17, ASME
A17.5-2019, CSA B44.1-19, EN81, IEC61800-5 and EN 60204-1. The factory
dielectric test is conducted using a voltage of 3640 VDC for one second.
EN 60204-1 states that it is permissable to disconnect already tested
components, such as the KEB elevator drive, because it has been 100%
factory tested. This is the recommended approach.
However, if subsequent testing is required in the integrated system (control
panel), the following points must be observed:
• High voltage LINE side (L1,L2,L3), DC (++, PA+, PB, --) and motor side
load connections (U, V, W) must all be jumpered together.
• All 24V control signals must be connected to earth ground.
• Only DC Voltage can be used for the test. Testing with AC voltage will
damage the semiconductors and capacitors within the elevator drive
thereby voiding the warranty.
• The maximum permitted voltage must be reduced to 80% of the
previously tested factory value. This is 2112 VDC for one second or 1760
VDC for 60 seconds.
• The suggested slew rate of the voltage, to minimum leakage current
resulting from capacitor charging, is 2000VDC/sec.
An insulation measurement (in accordance with EN 60204-1 chapter 18.2)
is permissable with 500VDC. The following points must be observed:
• High voltage LINE side (L1, L2, L3), DC (++, PA+, PB, --) and motor
load side connections (U,V,W) must all be jumpered together.
• All 24V control signals must be connected to earth ground.
• Only a DC voltage (maximum 500V) can be used for the test. Testing
with AC voltage will damage the semiconductors and capacitors within
the elevator drive.
The resulting insulation resistance shall be greater than 1MΩ