ABB REC650 Commissioning Manual

• Check that the function is on.
• Check that the correct setting group (1 to 4) is activated.
• Check the blocking.
• Check the mode.
• Check the measurement value.
• Check the connection to trip and disturbance recorder functions.
• Check the channel settings.
8.3.2.1 Inspecting the wiring
The physical inspection of wiring connections often reveals the wrong connection
for phase currents or voltages. However, even though the phase current or voltage
connections to IED terminals might be correct, wrong polarity of one or more
measurement transformers can cause problems.
• Check the current or voltage measurements and their phase information from
Main menu/Measurements/Analog primary values or Analog secondary
voltages.
• Check that the phase information and phase shift between phases is correct.
• Correct the wiring if needed.
• Change the parameter Negation in Configuration/Analog modules/
3PhaseAnalogGroup/1:SMAI_20_n (n= the number of the SMAI
used).
Changing the Negation parameter is not recommended
without special skills.
• In PCM600, change the parameter CTStarPointn (n= the number on the
current input) under the parameter settings for each current input.
• Check the actual state of the connected binary inputs.
• In LHMI, select Main menu/Tests/Binary input values/Binary input
modules. Then navigate to the board with the actual binary input to be
checked.
• With PCM600, right-click the product and select Signal Monitoring.
Then navigate to the actual I/O board and to the binary input in question.
The activated input signal is indicated with a yellow-lit diode.
• Measure output contacts using the voltage drop method of applying at least the
minimum contact load given for the output relays in the technical data, for
example 100 mA at 24 V AC/DC.
Output relays, especially power output relays, are designed for
breaking high currents. Due to this, layers of high resistance
may appear on the surface of the contacts. Do not determine
proper functionality of connectivity or contact resistance by
measuring with a regular hand-held ohm meter.
1MRK 511 248-UEN - Section 8
Troubleshooting
97
Commissioning Manual

ABB REC650 Specifications

General

Brand	ABB
Model	REC650
Category	Control Unit
Language	English