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• Current transformer circuit
Never allow the current transformer (CT) secondary circuit connected to this equipment to be
opened while the primary system is live. Opening the CT circuit will produce a dangerous high
voltage.
• Exposed terminals
Do not touch the terminals of this equipment while the power is on, as the high voltage generated
is dangerous.
• Residual voltage
Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. It
takes about 30 seconds for the voltage to discharge.
• Fiber optic
Do not view directly with optical instruments.
CAUTION
• Earth
Earth the earthing terminal of the equipment securely.
CAUTION
• Operation conditions
Use the equipment within the range of ambient temperature, humidity and dust as detailed in the
specification and in an environment free of abnormal vibration.
• Ratings
Before applying AC voltage and current or DC power supply to the equipment, check that they
conform to the equipment ratings.
• Printed circuit board
Do not attach and remove the printed circuit board while the DC power to the equipment is on, as
this may cause the equipment to malfunction.
• External circuit
When connecting the output contacts of the equipment to an external circuit, carefully check the
supply voltage used and prevent the connected circuit from overheating.
• Connection cable
Carefully handle the connection cable without applying excessive force.
• Modification
Do not modify this equipment, as this may cause the equipment to malfunction, and any such
modifications will invalidate the warranty.
• Short-link
Do not remove a short-link which is mounted at the terminal block on the rear of the relay before
DANGE
WARNING
