GEK-113308
MIWII Directional Power Protection System
12-1
12 MIWII DO’S AND DON’TS
12.1 DO’S
12
12 MIWII DO’S AND DON’TS 12.1DO’S
WARNING:
When communicating with the RS232 front port of the relay, ensure that the relay is properly grounded (ground must be
at the same level of the PC). Otherwise, use ungrounded PC.
•
Read the instruction manual carefully before installing the device.
•
Check the power supply rating before applying power to the relay.
Applying voltage greater than the maximum rating of the power supply (the actual rated voltage for an MIWII relay is
indicated in the front panel) can result in permanent component damage to the relay’s power supply.
•
Ensure that the source secondary matches the relay rated current .
MIWII can be ordered with either . Verify that the relay rated (indicated in the front panel) matches the secondary
rating of the connected . Unmatched may result in equipment damage or inadequate protection.
•
Check the correct polarity of the RS-485 connections.
Different manufacturers of Modbus
®
compatible devices including RS-485 ports can use different criteria for defining
port polarities. In order to avoid misuse of the MIWII rear communication port, please verify connections in accordance
with information provided in the MIWII instruction book.