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Universal Measuring Device UMG 500A
Commissioning
1.
Connect auxiliary voltage.
The 7-segment display shows “0”, or if a measured voltage is already present, another reading.
2.
Programming
When the auxiliary voltage is present, the device is ready for use and can be programmed.
To do this, the “local/remote” contact must be open (the LED must not light up).
2.1
Programme the current transformer.
2.2
Programme the voltage transformer.
2.3
If required, programme the analogue output.
2.4
If required, programme the relay outputs
2.5
If required, alter the device address.
Four-wire measurement
3.
Measured voltage
3.1
Switch off voltage to UMG 500A and connect voltage path L1 - N.
3.1.1 Switch on auxiliary voltage and measured voltage.
3.1.2 Using the operating keys of the UMG 500A, cause the voltage in L1 to be displayed and compare it with the
voltage applied at L1 - N.
3.2
Repeat the steps under 3.1 for the voltage paths L2 and L3.
Warning! Because the frequency is measured in L1, voltage must be present at this terminal. If not, the device assumes
that the frequency is 50 Hz, which results in measuring errors.
4.
Measured current
4.1
Switch off voltage to UMG 500A and connect current path for L1.
4.1.1 Switch on auxiliary voltage, measured voltage and measured current.
4.1.2 Using the operating keys of the UMG 500A, cause the current in L1 to be displayed and compare it with the
current applied at “k-l”.
4.1.3 Using the operating keys of the UMG 500A, cause the real power in L1 to be displayed.
If the display shows a “-” it indicates that generating mode is present or that “k” and “l” have been transposed.
4.2
Repeat the steps under 4.1 for the current paths L2 and L3.
Three-wire measurement
3.
Measured voltage
3.1
Switch off voltage to UMG 500A and connect voltages L1, L2 and L3.
3.1.1 Switch on auxiliary voltage and measured voltage.
3.1.2 Using the operating keys of the UMG 500A, cause the voltages to be displayed and compare it with the
voltages applied.
3.1.3 Check rotary field.
4.
Measured current
4.1
Switch off voltage to UMG 500A and connect current path for L1.
4.1.1 Switch on auxiliary voltage, measured voltage and measured current.
4.1.2 Using the operating keys of the UMG 500A, cause the current in L1 to be displayed and compare it with the
current applied at “k-l”.
4.1.3 Using the operating keys of the UMG 500A, cause the real power in L1 to be displayed.
If the display shows a “-” it indicates that generating mode is present or that “k” and “l” have been transposed.
4.2
Repeat the steps under 4.1 for the current paths L2 and L3.
