Electrical Installation - Danfoss vlt series Operating Instructions Manual

How to Install
30 A, fuse-protected terminals
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3-phase power matching incoming mains voltage
for powering auxiliary customer equipment.
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Not available if 2 manual motor starters are
selected.
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Terminals are off when the incoming power to
the frequency converter is off.
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Power for the fused protected terminals is
provided from the load side of any supplied
circuit breaker or disconnect switch.
24 V DC supply
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5 A, 120 W, 24 V DC.
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Protected against output overcurrent, overload,
short circuits, and overtemperature.
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For powering 3 rd party accessory devices such as
sensors, PLC I/O, contactors, temperature probes,
indicator lights, and/or other electronic hardware.
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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 frequency converter's STO circuit and can be
monitored via a fieldbus network (requires a separate
module/bus coupler).
Universal inputs (8) – signal types
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RTD inputs (including Pt100), 3-wire, or 4-wire.
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Thermocouple.
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Analog current or analog voltage.
Extra features:
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1 universal output, configurable for analog
voltage, or analog current.
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2 output relays (NO).
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Dual-line LC display and LED diagnostics.
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Sensor lead wire break, short circuit, and incorrect
polarity detection.
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Interface set-up software.
Dedicated thermistor inputs (2) – features
NOTICE
If the frequency converter is connected to a thermistor,
the thermistor control wires must be reinforced/double
insulated for PELV isolation. A 24 V DC supply for the
thermistor power is recommended.
•
Each module can monitor up to 6 thermistors in
series.
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Fault diagnostics for wire breakage or short
circuits of sensor leads.
MG34Q402
Operating Instructions
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3.4 Electrical Installation

See chapter 2 Safety Instructions for general safety
instructions.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to perform installation, start-up, and maintenance
by qualified personnel can result in death or serious
injury.
•
WARNING
INDUCED VOLTAGE
Induced voltage from output motor cables from different
frequency converters that are run together can charge
equipment capacitors even with the equipment turned
off and locked out. Failure to run output motor cables
separately or use shielded cables could result in death or
serious injury.
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•
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WARNING
SHOCK HAZARD
The frequency converter can cause a DC current in the
PE conductor and thus result in death or serious injury.
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Failure to follow the recommendation means that the
RCD cannot provide the intended protection.
Overcurrent protection
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Danfoss A/S © 04/2016 All rights reserved.
ATEX/UL/CSA certification.
A third thermistor input can be provided by the
®
VLT PTC Thermistor Card MCB 112, if necessary.
Only qualified personnel must perform instal-
lation, start-up, and maintenance.
Run output motor cables separately, or
Use shielded cables.
Simultaneously lock out all the frequency
converters.
When a residual current-operated protective
device (RCD) is used for protection against
electrical shock, only an RCD of Type B is
permitted on the supply side.
Extra protective equipment such as short-circuit
protection or motor thermal protection between
frequency converter and motor is required for
applications with multiple motors.
Input fusing is required to provide short circuit
and overcurrent protection. If fuses are not
factory-supplied, the installer must provide them.
See maximum fuse ratings in chapter 3.4.13 Fuses.
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