Electrical Installation; Ac Line Fuses - Danfoss FCM305 56 Instruction Manual

Electrical Installation

CAUTION!
The FCM 300 Series unit contains
dangerous voltages when connected
to line voltage. After disconnecting
from the line, wait at least 4 minutes before
touching any electrical components. Also make sure
that other voltage inputs have been disconnected.
Only competent electricians should carry out the
electrical installation. Improper installattion of the
FCM 300 Series unit may cause equipment failure,
serious injury or death. Follow this manual and
National Electrical Codes (NEC
codes and guidelines.
To avoid potential shock hazard when servicing the
unit, remove all power to all units that share any
conduit to be worked on.
In general, a conduit should not contain unshielded
power conductors for more than three (3) FCM 300
units.
NOTE:
It is the user's or installer's responsibility to ensure
correct grounding and branch circuit protection in
accordance with national and local codes.
The ground leakage currents are higher than 3.5
mA. This means the FCM 300 requires a fixed,
permant installation, as well as reinforced protective
grounding.
To meet EMC specifications, control cables must be
shielded. Connect the shielded cable to ground at
both ends and use cable clamps.
6-8
® ) and local safety
FCM 300 Series
Before wiring the unit, make sure your supply
voltage corresponds with the voltage requirement of
the FCM 300 unit, TT, IT and TN lines.
Type B RCD's (ELCB relays) or multiple protective
grounding can be used as extra protection of 3
phase equipment with a bridge rectifier and for a
brief discharge on power-up. If RCD's are used,
local regulations must be observed.
Be sure the installation is fused correctly.
Connect the three AC line phases to terminals L1,
L2 and L3 and the ground to the separate earth
ground terminal provided. When power is applied,
the green LED (LED 302) should be lit to indicate
the power is on. In units with built-in Profibus, LED
303 will flash. For further information on Profibus,
pleae see the Profibus manual.
For start-up instructions, please see "Operation" on
page 7-2.

AC Line Fuses

External fuses must be installed in the AC line supply
to the FCM 300 unit.
FCM Type AC Line Voltage
305 380-480 VAC
307 380-480 VAC
311 380-480 VAC
315 380-480 VAC
322 380-480 VAC
330 380-480 VAC
340 380-480 VAC
355 380-480 VAC
375 380-480 VAC
Suitable for use on a circuit capable of delivering not
more than 100,000 rms Symmetrical Amperes, 500
Volts Maximum, when protected by the above
fuses.
MG.03.B6.2G - VLT is a registered Danfoss trademark
Bussmann KTS-R or
JJS Type:
10 A
10 A
10 A
10 A
10 A
15 A
15 A
25 A
25 A