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W21 Flameproof Motor 0.55 kW 4P 90S 3Ph 220-240/380-415//440-460 V 50 Hz IC411 - TEFC - B35T

Product: 11205429

W21Xd is an explosion-proof motor especially designed to operate in environments with the presence of explosive atmospheres. It has robust construction, a flame retention system with gaps between the parts carefully designed, accurate machining on the terminal box and screws with high mechanical strength. It meets the requirements of explosive atmospheres like Zone 1 and Zone 2.

The W21Xd Standard Efficiency comply with the IE1 efficiency level, specified by IEC 60034-30-1.

Product features
Standard IEC 60034-1
Frequency 50 Hz
Voltage 220-240/380-415//440-460 V
Number of poles 4
Degree of Protection IP55
Synchronous speed 1500 rpm
Output rating 0.55 kW
Mounting Foot-mounted
Flange FF
Mounting B35T
Terminal box¹ Top
Enclosure IC411 - TEFC

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Product details

Electric Motors

Frame 90S
Output 0.550 kW
Number of Poles 4
Frequency 50 Hz
Rated speed 1420 rpm
Slip 5.33 %
Rated voltage 220/380 V
Rated current 2.40/1.39 A
L. R. Amperes 15.4/8.90 A
LRC 6.4
No load current 1.39/0.803 A
Rated torque 0.377 kgfm
Locked rotor torque 240 %
Breakdown torque 250 %
Locked rotor time 30s (cold) 17s (hot)
Moment of inertia (J) 0.0038 kgm²
Design N
Insulation Class F
Service factor 1.00
Temperature rise 80 K
Duty Cycle S1
Starting Method Direct On Line
Ambient temperature -20°C to +40°C
Altitude 1000 m.a.s.l.
Degree of Protection IP55
Enclosure IC411 - TEFC
Mounting B35T
Rotation¹ Both (CW and CCW)
Noise level² 49.0 dB(A)
Approx. weight³ 32.8 kg
(1) Looking the motor from the shaft end.; (2) Measured at 1m and with tolerance of +3dB(A).; (3) Approximate weight, subject to be changed after manufacturing process.; (4) At 100% of full load.

Efficiency

50% 75% 100%
70.2  74.8  75.0 

Power factor

50% 75% 100%
0.64  0.75  0.80 
Frame 90S
Output 0.550 kW
Number of Poles 4
Frequency 50 Hz
Rated speed 1425 rpm
Slip 5.00 %
Rated voltage 230/400 V
Rated current 2.37/1.36 A
L. R. Amperes 15.1/8.70 A
LRC 6.4
No load current 1.45/0.836 A
Rated torque 0.376 kgfm
Locked rotor torque 270 %
Breakdown torque 280 %
Locked rotor time 30s (cold) 17s (hot)
Moment of inertia (J) 0.0038 kgm²
Design N
Insulation Class F
Service factor 1.00
Temperature rise 80 K
Duty Cycle S1
Starting Method Direct On Line
Ambient temperature -20°C to +40°C
Altitude 1000 m.a.s.l.
Degree of Protection IP55
Enclosure IC411 - TEFC
Mounting B35T
Rotation¹ Both (CW and CCW)
Noise level² 49.0 dB(A)
Approx. weight³ 32.8 kg
(1) Looking the motor from the shaft end.; (2) Measured at 1m and with tolerance of +3dB(A).; (3) Approximate weight, subject to be changed after manufacturing process.; (4) At 100% of full load.

Efficiency

50% 75% 100%
69.0  73.0  75.0 

Power factor

50% 75% 100%
0.60  0.72  0.78 
Frame 90S
Output 0.550 kW
Number of Poles 4
Frequency 50 Hz
Rated speed 1430 rpm
Slip 4.67 %
Rated voltage 240/415 V
Rated current 2.35/1.36 A
L. R. Amperes 15.1/8.70 A
LRC 6.4
No load current 1.52/0.880 A
Rated torque 0.375 kgfm
Locked rotor torque 290 %
Breakdown torque 300 %
Locked rotor time 30s (cold) 17s (hot)
Moment of inertia (J) 0.0038 kgm²
Design N
Insulation Class F
Service factor 1.00
Temperature rise 80 K
Duty Cycle S1
Starting Method Direct On Line
Ambient temperature -20°C to +40°C
Altitude 1000 m.a.s.l.
Degree of Protection IP55
Enclosure IC411 - TEFC
Mounting B35T
Rotation¹ Both (CW and CCW)
Noise level² 49.0 dB(A)
Approx. weight³ 32.8 kg
(1) Looking the motor from the shaft end.; (2) Measured at 1m and with tolerance of +3dB(A).; (3) Approximate weight, subject to be changed after manufacturing process.; (4) At 100% of full load.

Efficiency

50% 75% 100%
68.0  73.8  75.0 

Power factor

50% 75% 100%
0.55  0.68  0.75 
Frame 90S
Output 0.550 kW
Number of Poles 4
Frequency 60 Hz
Rated speed 1740 rpm
Slip 3.33 %
Rated voltage 460 V
Rated current 1.21 A
L. R. Amperes 8.49 A
LRC 7.0
No load current 0.825 A
Rated torque 0.308 kgfm
Locked rotor torque 310 %
Breakdown torque 320 %
Locked rotor time 30s (cold) 17s (hot)
Moment of inertia (J) 0.0038 kgm²
Design N
Insulation Class F
Service factor 1.00
Temperature rise 80 K
Duty Cycle S1
Starting Method Direct On Line
Ambient temperature -20°C to +40°C
Altitude 1000 m.a.s.l.
Degree of Protection IP55
Enclosure IC411 - TEFC
Mounting B35T
Rotation¹ Both (CW and CCW)
Noise level² 51.0 dB(A)
Approx. weight³ 32.8 kg
(1) Looking the motor from the shaft end.; (2) Measured at 1m and with tolerance of +3dB(A).; (3) Approximate weight, subject to be changed after manufacturing process.; (4) At 100% of full load.

Efficiency

50% 75% 100%
68.1  72.7  74.9 

Power factor

50% 75% 100%
0.56  0.69  0.76 

Features

Frame Material Cast Iron 
Impregnation Method Dip and Bake Polyester 
Main terminal box hole M25x1,5 
Terminal Block BMC - 6 pins 
Shaft Material SAE 1040/45 Carbon Steel 
Painting RAL 5010 202P (ISO 12944 - C3) 
Grounding Lugs Double 
Fan Cover material Rolled Steel 
Tropicalized Painting Without 
Fan material Plastic 
Bearing cap Yes- Bearing Cap 
Winding thermal protection Thermistor - 2 wires 1 per phase 150°C 
Balancing Method 1/2 Key 
Drip Cover Without 

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Bearing details

  Drive End Non Drive End
Bearing type 6205 ZZ   6204 ZZ  
Sealing Lip Seal  Lip Seal 
Lubrication interval
Lubricant amount
Grease Type Mobil Polyrex EM 

Foundation loads

Max. traction Max. compression
11 kgf  44 kgf