SIGMATEK FDD Step By Step Guide Size 5 to 9
17
Eng
D
GROUND CONNECTION INSTRUCTIONS
UL Listed closed-loop connectors sized according to the field wiring shall be used for grounding connections.
BRANCH CIRCUIT PROTECTION
The fuses and circuit breakers required for branch circuit protection are specified in the Installation Instructions.
OPENING OF BRANCH CIRCUIT
Opening of the branch-circuit protective device may be an indication that a fault has been interrupted. To reduce the
risk of fire or electric shock, the equipment should be examined and replaced if damaged. If burnout of the current
element of an overload relay occurs, the complete overload relay must be replaced.
Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit protection must
be provided in accordance with the National Electrical Code (NEC), The Canadian Electrical Code, and any
additional local codes.
A.7 Motor overload protection and thermal memory retention
The devices incorporate solid state overload protection for the motor load. The protection levels are expressed as a
percentage of full-load current. Refer to the
Control User Guide
for further information.
In order for the motor protection to work properly, the motor rated current must be entered into Pr
06
or Pr
05.007
.
The protection level may be adjusted below 150 % if required. Refer to the
Control User Guide
for further information.
All models are provided with thermal memory retention.
A.8 External Class 2 supply
The external power supply used to power the 24 V control circuit shall be marked: "UL Class 2". The power supply
voltage shall not exceed 24 Vdc.
Содержание FDD 3054.00270
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