Hitachi Relion 670 Series Commissioning Manual page 272

Section 14
Troubleshooting
Moving a module in an IED from one position to another
Procedure:
1. Remove all existing configuration for the module in PCM, and write that configuration to the IED.
2. Switch the IED off and move the HW module.
3. Switch the IED on, wait for it to start, and then perform a HW reconfig.
4. Perform a license update in PCM600.
The new module is now available in PCM600 at the new position and is ready to be configured.
14.3 Repair instruction
An alternative is to open the IED and send only the faulty circuit board to Hitachi Energy for repair. When
a printed circuit board is sent to Hitachi Energy , it must always be placed in a metallic, ESD-proof,
protection bag. The user can also purchase separate replacement modules.
Most electronic components are sensitive to electrostatic discharge and latent damage may occur.
Please observe usual procedures for handling electronics and also use an ESD wrist strap. A semi-
conducting layer must be placed on the workbench and connected to ground.
Disassemble and reassemble the IED accordingly:
1. Switch off the dc supply.
2. Short-circuit the current transformers and disconnect all current and voltage connections from the
IED.
3. Disconnect all signal wires by removing the female connectors.
4. Disconnect the optical fibers.
5. Unscrew the main back plate of the IED.
6. If the transformer module is to be changed:
266
If any configuration that makes the module needed remains, then the HW reconfig will not
remove the module.
The module will still be needed. An error indication for the module will appear, if the module is
physically removed from the IED and the IED is restarted with some part of the configuration
still requiring the module.
Never disconnect the secondary connection of a current transformer circuit without short-
circuiting the transformer's secondary winding. Operating a current transformer with the
secondary winding open will cause a massive potential build up that may damage the
transformer and may cause injuries to humans.
Never connect or disconnect a wire and/or a connector to or from a IED during normal
service. Hazardous voltages and currents are present that may be lethal. Operation may be
disrupted and IED and measuring circuitry may be damaged.
Strictly follow the company and country safety regulations.
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1MRK506371-UUS Rev. M
IP8767-1 v1
M11764-2 v4
M11764-10 v4
M11766-4 v3
Line distance protection REL670
Commissioning manual