Anti-Condensation Heater; Brake Chopper; Mains Shield; Mains Disconnect - Danfoss VLT AutomationDrive FC 302 Operating Instructions Manual

Installation

3.7.3 Anti-condensation Heater

An anti-condensation heater can be installed inside the
frequency converter to prevent condensation from forming
inside the enclosure when the unit is turned off. The
heater is controlled by customer-supplied 230 V AC. For
best results, operate the heater only when the unit is not
running and turn the heater off when the unit is running.

3.7.4 Brake Chopper

A brake chopper can be supplied for applications that
have a regenerative load. The brake chopper connects to a
brake resistor, which consumes the braking energy,
preventing an overvoltage fault on the DC bus. The
braking chopper is automatically activated when the DC
bus voltage exceeds a specified level, depending on the
nominal voltage of the frequency converter.

3.7.5 Mains Shield

The mains shield is a Lexan cover installed inside the
enclosure to provide protection according to VBG-4
accident-prevention requirements.

3.7.6 Mains Disconnect

The disconnect option is available in both varieties of
option cabinets. The position of the disconnect changes
based on the size of the options cabinet and whether or
not other options are present. Table 3.6 provides more
detail about which disconnects are used.
Voltage [V] Frequency Converter
Model
380–500 N90KT5–N132T5
N160T5–N250T5
525–690 N55KT7–N132T7
N200T7–N315T7
Table 3.6 Mains Disconnect Types
MG34U302
Operating Instructions
Disconnect Manufacturer
and Type
ABB OT400U03
ABB OT600U03
ABB OT400U03
ABB OT600U03
Danfoss A/S © Rev. 2014-02-20 All rights reserved.

3.7.7 Contactor

The contactor is powered by a customer-supplied 230 V
AC 50/60 Hz signal.
Voltage Frequency Contactor
[V] Converter Manufacturer and
Model Type
380-500 N90KT5– GE CK95BE311N
N132T5
N160T5– GE CK11CE311N
N200T5
N250T5 GE CK11CE311N
525-690 N55KT7– GE CK95BE311N
N132T7
N160T7– GE CK11CE311N
N315T7
Table 3.7 Contactor Types
NOTICE
In applications requiring UL listing, when the frequency
converter is supplied with a contactor, the customer
must provide external fusing to maintain the UL rating
of the fequency converter and a short circuit current
rating of 100,000 A. See chapter 11.3 Fuse Tables for fuse
recommendations.

3.7.8 Circuit Breaker

Table 3.8 provides details on the type of circuit breaker
provided as an option with the various units and power
ranges.
Voltage [V] Frequency
Converter Model
380–500 N90KT5–N110T5
N132T5
N160T5
N200T5
N250T5
525–690 N55KT7–N132T7
N160T7–N250T7
N315T7
Table 3.8 Circuit Breaker Types
IEC
Utilization
Category
AC-3
AC-3
AC-1
AC-3
AC-3
Circuit Breaker Manufacturer
and Type
ABB T5L400TW
ABB T5LQ400TW
ABB T6L600TW
ABB T6LQ600TW
ABB T6LQ800TW
ABB T5L400TW
ABB T6L600TW
ABB T6LQ600TW
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