Taco SKV SelfSensing

Taco® SKV
12
302-365, Effective: June 5, 2017
© 2017 Taco, Inc.
For your safety, comply with the following require-
ments:
• Electronic controls equipment is connected to haz-
ardous AC line voltage. Extreme care should be
taken to protect against electrical hazards when
applying power to the unit.
• Run motor cables from multiple adjustable frequency
drives separately. Induced voltage from output motor
cables run together can charge equipment capacitors
even with the equipment turned off and locked out.
8.2.1 Overload and Equipment Protection
• An electronically activated function within the adjust-
able frequency drive provides overload protection for
the motor. The overload calculates the level of
increase to activate timing for the trip (controller out-
put stop) function. The higher the current draw, the
quicker the trip response. The overload provides
Class 20 motor protection. See “14 Warnings and
Alarms” on page 61 for details on the trip function.
• Because the motor wiring carries high frequency cur-
rent, it is important that wiring for line power, motor
power, and control is run separately. Use metallic
conduit or separated shielded wire. Failure to isolate
power, motor, and control wiring could result in less
than optimum equipment performance. See Figure 8-
4.
Figure 8-4: Proper Electrical Installation Using
Flexible Conduit
All adjustable frequency drives must be provided with
short-circuit and overcurrent protection. Input fusing is
required to provide this protection, see Figure 9.2.3. If not
factory supplied, fuses must be provided by the installer
as part of installation.
Figure 8-5: Adjustable Frequency Drive Fuses
Wire Type and Ratings
• All wiring must comply with local and national regula-
tions regarding cross-section and ambient tempera-
ture requirements.
• Danfoss recommends that all power connections be
made with a minimum 167°F [75 °C] rated copper
wire.
8.3 Grounding Requirements
DANGER: GROUNDING HAZARD! For
operator safety, it is important to ground
adjustable frequency drive properly in accor-
dance with national and local electrical
codes as well as instructions contained
within these instructions. Ground currents
are higher than 3.5 mA. Failure to ground the
adjustable frequency drive properly could
result in death or serious injury.
NOTE: It is the responsibility of the user or certified elec-
trical installer to ensure correct grounding of the equip-
ment in accordance with national and local electrical
codes and standards.
• Follow all local and national electrical codes to
ground electrical equipment properly.
• Proper protective grounding for equipment with
ground currents higher than 3.5 mA must be estab-
lished, see Leakage Current (>3.5 mA).
• A dedicated ground wire is required for input power,
motor power and control wiring.