General Information About Motor Identification And Ex-Markings - ABB AMD Rg 355 Installation, Operation And Maintenance Instructions

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Installation, operation and maintenance instructions
High voltage flameproof motors for explosive atmosphere
AMD Rg 355-400-450-500

General information about motor identification and Ex-Markings

1. MOTOR IDENTIFICATION
1.1. SERIAL NUMBER
Every AMD Rg cast iron motor is identified by means of the serial number, number that is always written on the
nameplate.
1.2. NAMEPLATES
The motor nameplate contains the entire characteristic parameters and values required for the machine
identification and the operation of the motor. The nameplate is always fixed on the motor frame. The content of
the nameplate is in accordance with the data list required by the IEC/EN 60034-1 Standard.
The machines of this manual and with final destination in the European Market have a marking with:

CE mark (or, only for United Kingdom market, UK CA mark)

Identification number of the Notified Body predisposed for quality surveillance in the manufacturer site (e.g.:
EUROFINS = 0537)

Specific marking of explosion protection ("epsilon-x" symbol)

Equipment Group:

II – Surface plants, or

I – Underground plants (mine susceptible to firedamp)

Equipment Category: 2 or 3 (utilization Zone in accordance with EN 60079-10)

Environment symbol for which the motor has been designed:

G: presence of gas, or

D: presence of dusts, or

M: presence of firedamp
Moreover, as these motors are explosion proof enclosures, the marking as per IEC/EN 60079-0 and IEC/EN
60079-1 Standards is present. The marking contains:

Ex symbol, which indicates that the motor has been designed and manufactured to operate in potentially
explosive atmosphere

Level of Protection (db, db eb, tb, tc)

Group identifying the nature of the potentially explosive gas (or dust, or firedamp if available) for which the
flameproof motor was intended and designed: IIB/IIC, or IIIC/IIIB, or I if available

Temperature class related to the nature of gas (T3 or T4 or T5) or nature of dust (T125°C or T150°C)

Equipment Protection Level (EPL): Gb or Db (or Dc) or Mb
Nameplates and markings similar as above are used for the main terminal box too. The use of separate
nameplates and markings between the terminal boxes and the motor is provided to cover the cases of terminal
boxes designed and manufactured under different protection type respect to the motor, i.e. protection type
"increased safety" (with marking Ex eb). Other separate plates are fitted on the motor containing instructions for
bearings' lubrication, safety indication etc.
1.3. AMD Rg 355-500 Cast Iron motor series – GENERAL CHARACTERISTICS
The 3-phase induction motors AMD Rg 355-500 IIB/IIC cast iron series has a shaft height of 355, or 400, or 450,
or 500 mm, supplied by DOL or by frequency converter. Frame surface is cooled with external fan fixed on motor
shaft. Cooling type is air-air cooling IC411 "self-ventilation". Cylindrical form cast iron frame includes cooling ribs
structure. If technically required, for example motors with variable rotation speed, the external cooling air can be
forced by a separated motor-fan "forced ventilation" (IC416).
The motors are available for 2 or more poles with sleeve or antifriction bearing types. The mounting arrangement
can be:

IM 1001: motor with horizontal axis, frame with feed down
Sheet No.
PMD06062019
Rev. 01 01.2023
Page 1 of 4
Issued by: MOLM