Nx Networks NX series user manual 786, Safety instructions

1

Safety 7(86)

1.SAFETY

ONLY A COMPETENT ELECTRICIAN SHOULD CARRY OUT

THE ELECTRICAL INSTALLATION

1.1 Warnings

WARNING

1	The components of the power unit of the frequency converter are live
	when the NX is connected to mains potential. Contact with this voltage
	is extremely dangerous and may cause death or severe injury. The
	control unit is isolated from the potential.
2	The motor terminals U, V, W and the DC-link/brake resistor terminals –/+
	are live when the NX is connected to mains, even if the motor is not
	running.
3	The control I/O-terminals are isolated from the mains potential. However,
	the relay outputs and other I/O-terminals may have a dangerous control
	voltage present even when the NX is disconnected from mains.
4	The frequency converter has a large capacitive leakage current.
5	If the frequency converter is used as a part of a machine, the machine
	manufacturer is responsible for providing the machine with a main switch
	(EN 60204-1).
6	Only spare parts delivered by Honeywell can be used.

1.2 Safety instructions

1	The NX frequency converter is meant for fixed installations only.
2	Do not perform any measurements when the frequency converter is
	connected to the mains.
3	After disconnecting the frequency converter from the mains, wait until the
	fan stops and the indicators on the keypad extinguish. (if no keypad is
	attached see the indicators on the cover). Wait 5 more minutes before
	doing any work on the NX connections. Do not even open the cover
	before this time has expired.
4	Do not perform any voltage withstand tests on any part of the NX. There
	is a defined procedure for making this test. Ignoring this procedure may
	result in damage to the frequency converter.
5	Prior to measurements on the motor or the motor cable, disconnect the
	motor cable from the frequency converter.
6	Do not touch the IC-circuits on the circuit boards. Static voltage discharge
	may damage the components.
7	Before connecting the frequency converter to mains, ensure that the
	frequency converter front and cable covers are closed.