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PQube 3 Instruction Manual
Page 16 of 103
3.1.3
Include overcurrent protection and a disconnecting device
An external overcurrent protection device, such as a fuse or a circuit breaker, must be installed on
each mains connection.
The device shall be UL Listed, branch circuit type overcurrent protector,
rated max. 10A.
Your PQube 3 can share the overcurrent protection device with other loads.
An operator-activated disconnecting device, such as a switch or a circuit breaker, must be installed
on the mains connections. This device must be clearly marked as the disconnecting device for your
PQube 3, and must be marked to indicate the disconnection function. Do not install your PQube 3
in such a way that it becomes difficult to operate this disconnecting device. The disconnecting
device must not disconnect the earth connection. The disconnecting device should be installed
near your PQube 3, within easy reach of the operator.
3.1.4
Protect the operator from the hazardous terminals
IMPORTANT:
All high voltage parts must be covered, including the AC power to your PQube 3.
Install your PQube 3 so that all of the screw terminal blocks are not
ACCESSIBLE
1
to the operator.
Your PQube 3 can also be installed without a cover if installed in a lockable IUL 508 control panel.
The operator must be protected from the hazardous screw terminal blocks by a barrier. The screw terminal blocks must be made
“not
ACCESSIBLE
”, as defined in UL /IEC 61010-1 6.2, using an enclosure or barrier that meets the rigidity requirements of UL /IEC
61010-1 8.1 and that requires a tool to remove.
1
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