Danfoss VLT AHF 005 Design Guide

Emergency stop with Pilz safety relay
Includes a redundant 4-wire emergency stop push button
mounted on the front of the enclosure, and a Pilz relay
that monitors it along with the safe-stop circuit and
contactor position. Requires a contactor and the options
cabinet for drives with enclosure size F.
Brake chopper (IGBTs)
Brake terminals with an IGBT brake chopper circuit allow
for the connection of external brake resistors. For detailed
data on brake resistors, see the VLT
®
Brake Resistor MCE 101
Design Guide, available at drives.danfoss.com/downloads/
portal/#/.
Regen terminals
Allow connection of regen units to the DC bus on the
capacitor bank side of the DC-link reactors for regenerative
braking. The enclosure size F regen terminals are sized for
approximately 50% the power rating of the drive. Consult
the factory for regen power limits based on the specic
drive size and voltage.
Load sharing terminals
These terminals connect to the DC-bus on the
rectier side
of the DC-link reactor and allow for the sharing of DC bus
power between multiple drives. For drives with enclosure
size F, the load sharing terminals are sized for approxi-
mately 33% of the power rating of the drive. Consult the
factory for load sharing limits based on the specic drive
size and voltage.
Disconnect
A door-mounted handle allows for the manual operation of
a power disconnect switch to enable and disable power to
the drive, increasing safety during servicing. The
disconnect is interlocked with the cabinet doors to prevent
them from being opened while power is still applied.
Circuit breakers
A circuit breaker can be remotely tripped, but must be
manually reset. Circuit breakers are interlocked with the
cabinet doors to prevent them from being opened while
power is still applied. When a circuit breaker is ordered as
an option, fuses are also included for fast-acting current
overload protection of the AC drive.
Contactors
An electrically-controlled contactor switch allows for the
remote enabling and disabling of power to the drive. If the
IEC emergency stop option is ordered, the Pilz relay
monitors the auxiliary contact on the contactor.
Manual motor starters
Provide 3-phase power for electric cooling blowers that are
often required for larger motors. Power for the starters is
provided from the load side of any supplied contactor,
circuit breaker, or disconnect switch. If a Class 1 RFI lter
option is ordered, the input side of the RFI provides the
power to the starter. Power is fused before each motor
starter and is o when the incoming power to the drive is
o. Up to 2 starters are allowed. If a 30 A fuse-protected
circuit is ordered, then only 1 starter is allowed. Starters
are integrated into the safe-stop circuit. Features include:
•
Operation switch (on/o).
•
Short circuit and overload protection with test
function.
•
Manual reset function.
30 A, fuse-protected terminals
•
3-phase power matching incoming mains voltage
for powering auxiliary customer equipment.
•
Not available if 2 manual motor starters are
selected.
•
Terminals are o when the incoming power to
the drive is o.
•
Power for the terminals is provided from the load
side of any supplied contactor, circuit breaker, or
disconnect switch. If a Class 1 RFI lter option is
ordered, the input side of the RFI provides the
power to the starter.
Common motor terminals
The common motor terminal option provides the busbars
and hardware required to connect the motor terminals
from the paralleled inverters to a single terminal (per
phase) to accommodate the installation of the motor-side
top entry kit.
This option is also recommended to connect the output of
a drive to an output lter or output contactor. The
common motor terminals eliminate the need for equal
cable lengths from each inverter to the common point of
the output lter (or motor).
24 V DC supply
•
5 A, 120 W, 24 V DC.
•
Protected against output overcurrent, overload,
short circuits, and overtemperature.
•
For powering customer-supplied accessory
devices such as sensors, PLC I/O, contactors,
temperature probes, indicator lights, and/or other
electronic hardware.
•
Diagnostics include a dry DC-ok contact, a green
DC-ok LED, and a red overload LED.
External temperature monitoring
Designed for monitoring temperatures of external system
components, such as the motor windings and/or bearings.
Includes 8 universal input modules plus 2 dedicated
thermistor input modules. All 10 modules are integrated
into the safe-stop circuit and can be monitored via a
eldbus network, which requires the purchase of a
separate module/bus coupler. A Safe Torque O brake
option must be ordered when selecting external
temperature monitoring.
Options and Accessories Ove...
VLT
®
HVAC Drive FC 102
46 Danfoss A/S © 11/2017 All rights reserved. MG16C302
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Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English