Markings Of The Drive; Foreseeable Misuse; Thermal Motor Protection; Atex Etr Thermal Monitoring - Danfoss VLT PTC Thermistor Card MCB 112 Operating Manual

VLT® PTC Thermistor Card MCB 112
Operating Guide
BUILT-IN OPTION
The VLT PTC Thermistor Card MCB 112 is only functional if it is built into the drive. The option cannot be used as a standalone.
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1.5.1.1 Markings of the Drive

A sticker is delivered with the option as spare part or with the drive to signify ATEX certification. Apply this sticker to the front of the
drive in which the ATEX module is integrated. This sticker indicates that the drive is ATEX certified.
Illustration 1: Label to Apply to Drive

1.5.2 Foreseeable Misuse

Any use not expressly approved by Danfoss constitues misuse. This also applies to failure to comply with the specified operating
conditions and applications.
Danfoss assumes no liability of any sort for damage attributable to improper use.
Only operate with explosion-protected 3-phase motors which are built, tested, and labeled separately for use with drives.
EXPLOSION DANGER
Zone 0 and Zone 20 are not applicable to electrical motors. Using electrical motors in those zones can cause explosions.
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Only use elecrical motors in:
Zone 1/21.
Zone 2/22.

1.5.3 Thermal Motor Protection

According to ATEX Directive 2014/34/EU and Standard EN 60079-14, motor overload protection is a requirement. The VLT
Thermistor Card MCB 112 monitors the temperature in the motor windings with an ATEX-approved motor overload protection de-
vice. If there is a critical temperature level or a malfunction, switch off the motor. If the drive is equipped with 3 or 6 PTC thermistors
in series according to DIN VDE V 0898-1-401: 2020-03, the MCB 112 offers ATEX-approved monitoring of the motor temperature.
Alternatively, an external ATEX-approved PTC protection device can be used.

1.5.4 ATEX ETR Thermal Monitoring

The ATEX ETR thermal monitoring function only applies to Ex eb and Ex ec motors. There is no need of ATEX ETR thermal moni-
toring for Ex db motors.
Danfoss A/S © 2022.08
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Introduction
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AQ267038105120en-000101 / 130R0104 | 7
PTC