IEC (World)	CENELEC (Europe)	CEI (Italy)	UNEL (Italy)	DIN (Germany)	VDE (Germany)	BS (UK)	NFC (France)
Electrical specifications	IEC34-1	HD 53.1.S2	CEI EN 60034-1			VDE 0530T1	BS 2613 5000	NFC 51-100  51-120
Protection class	IEC34-5	EN 60034-5	CEI EN 60034-5	UNEL 05515	DIN 40050	VDE 0530	BS 4999-20	NFC 51-115
Motor ventilation system	IEC34-6	EN 60034-6			DIN IEC34-6		BS 4999-21
Configuration	IEC34-7	HD 53.7	CEI EN 60034-7	UNEL 05513	DIN 42950			NFC 51-117
Noise limits	IEC34-9		CEI EN 60034-9
Standardized voltages	IEC38		CEI 8-6					NFC 6
Sizes and dimensions	IEC72-1		CEI IEC 72-1	UNEL 13113 13117 13118	DIN 42673 42677 42946		BS 3979	NFC  51-105 51-120

The performances and characteristics of the standard motors can vary depending on the environmental conditions. The data reported in this catalogue are intended for motors operating in environments with temperature ranging from –20°C to +40°C, at altitudes of up to 1000ms above sea level and with humidity value that does not exceed 95%. The performances of the motor must be declassed with the increasing of the temperature over 40°C and the increasing of the altitude. Nicolini & C. can supply, on request, special treatments for motors to be used in tropical environments or with humidity values higher than 95%.

The service of an electrical motor defines the load duration and sequence to which the motor is subjected. Nicolini & C. motors can operate for a continuous service, indicated with S1, unless otherwise required. The continuous service consists in subjecting the motor to a constant load with enough duration to guarantee the achievement of a thermal balance.   

• S 1 = Continuous duty
• S 2 = Limited duty
• S 3 = Periodic intermittent duty
• S 4 = Periodic intermittent duty with starting phase
• S 5 = Periodic intermittent duty with starting phase and electrical braking phase
• S 6 = Continuous duty with intermittent load
• S 7 = Continuous duty with intermittent load and electrical braking phase

the windings of the standard motors are insulated with materials of class F (overtemperature of 105°C) even if they are designed for limit overtemperatures of class B (thermal reserve). The copper wire is insulated with a double layer of insulating enamel of class H (overtemperature of 125°C).  This means longer life of the insulating devices and the possibility to use, for short periods, the motors over the load and temperature limits normally established for such motors. An increased insulation is supplied, on request, for the particular use of motors with inverters.

The motors generally come with protection “IP55” unless otherwise indicated. This means that they are fitted with sealing rings in  both part “D” of the motor (power take-off shaft) and part “N” (on the opposite side of the shaft). The protection IP55 indicates the protection degree “5” to prevent harmful dusts from entering, and the protection “5” against the harmful effects due to the infiltration of water jets. We can supply, on request, motors with higher protection degree: IP56 (protection against powerful jets of water); IP57 (protection against effects of temporary immersions). The motors that are to be used in humid areas or for intermittent services are fitted with special holes for the condensation draining.