Avoid Unintended Start; Safe Stop Of Fc - Danfoss MCO 350 Operating Instructions Manual

Syncronising Controller MCO 350 Operating
Instructions
1.1.6. General Warning
1.1.7. Before Commencing Repair Work
1.
2.
3.
4.

1.1.8. Avoid Unintended Start

While FC 300 is connected to mains, the motor can be started/stopped using digital commands,
bus commands, references or via the Local Control Panel (LCP).
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1.1.9. Safe Stop of FC 300

The FC 302, and also the FC301 in A1 enclosure, can perform the safety function
Off
(As defined by IEC 61800-5-2) or
FC 301 A1 enclosure: When Safe Stop is included in the drive, position 18 of Type Code must be
either T or U. If position 18 is B or X, Safe Stop Terminal 37 is not included!
Example:
Type Code for FC 301 A1 with Safe Stop: FC-301PK75T4Z20H4TGCXXXSXXXXA0BXCXXXXD0
Warning:
Touching the electrical parts may be fatal - even after the equipment has been dis-
connected from mains.
Also make sure that other voltage inputs have been disconnected, such as load-
sharing (linkage of DC intermediate circuit), as well as the motor connection for
kinetic back-up.
®
Using VLT AutomationDrive FC 300: wait at least 15 minutes.
Shorter time is allowed only if indicated on the nameplate for the specific unit.
Leakage Current
The earth leakage current from the FC 300 exceeds 3.5 mA. To ensure that the earth
cable has a good mechanical connection to the earth connection (terminal 95), the
cable cross section must be at least 10 mm
separately.
Residual Current Device
This product can cause a D.C. current in the protective conductor. Where a residual
current device (RCD) is used for extra protection, only an RCD of Type B (time de-
layed) shall be used on the supply side of this product. See also RCD Application
Note MN.90.GX.02.
Protective earthing of the FC 300 and the use of RCD's must always follow national
and local regulations.
Disconnect the frequency converter from mains
Disconnect DC bus terminals 88 and 89 from load share applications
Wait for discharge of the DC-link. See period of time on the warning label
Remove motor cable
Disconnect the FC 300 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.
An electronic fault, temporary overload, a fault in the mains supply, or lost motor con-
nection may cause a stopped motor to start. FC 300 with Safe Stop (i.e. FC 301 in A1
enclosure and FC 302) provides protection against unintended start, if the Safe Stop
Terminal 37 is on low voltage level or disconnected.
®
MG.33.Q1.02 - VLT is a registered Danfoss trademark
2
or 2 times rated earth wires terminated
Stop Category 0
(as defined in EN 60204-1).
1. Safety Regulation
Safe Torque
7
1