GE AF-600 FP Series, Design And Installation Manual

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Protection and Features
•
Electronic thermal motor protection against overload.
•
Temperature monitoring of the heatsink ensures that the adjustable frequency drive trips if the temperature
reaches a predefined level. An overload temperature cannot be reset until the temperature of the heatsink is
below the values stated in the tables on the following pages (guideline - these temperatures may vary for different
power sizes, unit sizes, enclosure ratings, etc.).
•
The adjustable frequency drive is protected against short-circuits on motor terminals U, V, W.
•
If a line phase is missing, the adjustable frequency drive trips or issues a warning (depending on the load).
•
Monitoring of the intermediate circuit voltage ensures that the adjustable frequency drive trips if the intermediate
circuit voltage is too low or too high.
•
The adjustable frequency drive is protected against ground faults on motor terminals U, V, W.
12.3 Fuse Tables
12.3.1 Fuses
It is recommended to use fuses and/ or circuit breakers on
the supply side as protection in case of component break-
down inside the adjustable frequency drive (first fault).
NOTE!
This is mandatory in order to ensure compliance with IEC
60364 for CE or NEC 2009 for UL.
WARNING
Personnel and property must be protected against the
consequence of component breakdown internally in the
adjustable frequency drive.
Branch Circuit Protection
In order to protect the installation against electrical and
fire hazard, all branch circuits in an installation, switch
gear, machines etc., must be protected against short-circuit
and overcurrent according to national/international
regulations.
NOTE!
The recommendations given do not cover branch circuit
protection for UL.
Short-circuit protection
GE recommends using the fuses/circuit breakers
mentioned below to protect service personnel and
property in case of component breakdown in the
adjustable frequency drive.
Overcurrent protection:
The adjustable frequency drive provides overload
protection to limit threats to human life, property damage
and to avoid fire hazard due to overheating of the cables
in the installation. The adjustable frequency drive is
equipped with an internal overcurrent protection
(
F-43 Current Limit ) that can be used for upstream overload
protection (UL applications excluded). Moreover, fuses or
circuit breakers can be used to provide the overcurrent
protection in the installation. Overcurrent protection must
always be provided in accordance with national
regulations.
WARNING
In case of malfunction, not following the recommendation
may result in personnel risk and damage to the drive and
other equipment.
The following tables list the recommended rated current.
Recommended fuses are of the type gG for small to
medium power sizes. For larger powers, aR fuses are
recommended. Circuit breakers must be used provided
they meet the national/international regulations and they
limit the energy into the drive to an equal or lower level
than the compliant circuit breakers.
If fuses/circuit breakers are chosen according to
recommendations, possible damage to the drive will be
limited to damage mainly within the unit.
12.3.2 Recommendations
WARNING
In case of malfunction, not following the recommendation
may result in personnel risk and damage to the adjustable
frequency drive and other equipment.
The following tables list the recommended rated current.
Recommended fuses are of the type gG for small to
medium power sizes. For larger powers, aR fuses are
recommended. Circuit breakers must be used provided
they meet the national/international regulations and they
Specifications AF-600 FP Design and Installation Guide
12-16 DET-768A
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