Before Commencing Repair Work; Special Conditions; Avoid Unintended Start; Safe Stop Installation - Danfoss VLT AQUA Drive FC 200 Operating Instructions Manual

Safety
WARNING
Leakage Current
2 2
The earth leakage current from the frequency converter
exceeds 3.5 mA. According to IEC 61800-5-1 a reinforced
Protective Earth connection must be ensured by means of:
a min. 10 mm² Cu or 16 mm² Al PE-wire or an addtional PE
wire - with the same cable cross section as the Mains
wiring - must be terminated separately.
Residual Current Device
This product can cause a DC current in the protective
conductor. Where a residual current device (RCD) is used
for extra protection, only an RCD of Type B (time delayed)
shall be used on the supply side of this product. See also
RCD Application Note MN90GX02.
Protective earthing of the frequency converter and the use
of RCDs must always follow national and local regulations.

2.1.3 Before Commencing Repair Work

1. Disconnect the frequency converter from mains
2. Disconnect DC bus terminals 88 and 89
3. Wait at least the time mentioned in 2.1.2 General
Warning

2.1.4 Special conditions

Electrical ratings:
The rating indicated on the nameplate of the frequency
converter is based on a typical 3-phase mains power
supply, within the specified voltage, current and
temperature range, which is expected to be used in most
applications.
The frequency converters also support other special
applications, which affect the electrical ratings of the
frequency converter. Special conditions which affect the
electrical ratings might be:
•
Single phase applications
•
High temperature applications which require
derating of the electrical ratings
•
Marine applications with more severe environ-
mental conditions.
Consult the relevant clauses in these instructions and in
the Design Guide for information about the electrical
ratings.
Installation requirements:
The overall electrical safety of the frequency converter
requires special installation considerations regarding:
•
Fuses and circuit breakers for over-current and
short-circuit protection
•
Selection of power cables (mains, motor, brake,
loadsharing and relay)
•
Grid configuration (IT,TN, grounded leg, etc.)
8
VLT AQUA Low Harmonic Drive Operating Instructions
•
Consult the relevant clauses in these instructions and in
the Design Guide for information about the installation
requirements.

2.1.5 Avoid Unintended Start

While the frequency converter is connected to mains, the
motor can be started/stopped using digital commands, bus
commands, references or via the LCP.
•
•
•

2.1.6 Safe Stop Installation

To carry out an installation of a Category 0 Stop
(EN60204) in conformity with Safety Category 3 (EN954-1),
follow these instructions:
1.
2.
Illustration 2.1 Bridge jumper between terminal 37 and 24 V DC
®
MG20T202 - VLT is a registered Danfoss trademark
Safety of low-voltage ports (PELV conditions).
WARNING
Disconnect the frequency converter from mains
whenever personal safety considerations make it
necessary to avoid unintended start.
To avoid unintended start, always activate the
[Off] key before changing parameters.
Unless terminal 37 is turned off, an electronic
fault, temporary overload, a fault in the mains
supply, or lost motor connection may cause a
stopped motor to start.
The bridge (jumper) between Terminal 37 and 24
V DC must be removed. Cutting or breaking the
jumper is not sufficient. Remove it entirely to
avoid short-circuiting. See jumper on
Illustration 2.1.
Connect terminal 37 to 24 V DC by a short-circuit
protected cable. The 24 V DC voltage supply
must be interruptible by an EN954-1 Category 3
circuit interrupt device. If the interrupt device and
the frequency converter are placed in the same
installation panel, an unscreened cable can be
used instead of a screened one.