ATV21WD37N4C

Name: ATV21WD37N4C
Brand: Schneider
SKU: ATV21WD37N4C

Product ModelATV21WD37N4C

Product ID33847

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

1
Efficient Operation37kW, 50hp rating ideal for HVAC applications.
2
Robust EnclosureNEMA 12/IP54/IP55 for durability in harsh environments.
3
Easy MonitoringRed LED display for clear status indication.
4
Versatile ApplicationSuitable for asynchronous motors, pumps, and fans in HVAC systems.
5
High ReliabilityEMC class C2 filter integrated to minimize electromagnetic interference.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Range of Product

Altivar 21

Product or Component Type

Variable speed drive

Product destination

Asynchronous motors

Product Specific Application

Pumps and fans in HVAC

Assembly style

With heat sink

Component name

ATV21

EMC filter

Class B EMC filter integrated

power supply voltage

380...480 V - 15...10 %

Phase

3 phase

Motor power kW

37 kW

Maximum Horse Power Rating

50 hp

Line current

54.4 A 480 V68.9 A 380 V

Speed range

1...10

Transient overtorque

120 % of nominal motor torque +/- 10 % 60 s

Asynchronous motor control profile

Current flux vector control (FVC) without speed feedbackConstant voltage/frequency ratio with automatic IR compensationQuadratic voltage/frequency ratioConstant voltage/frequency ratioEnergy saving ratio

communication port protocol

Modbus

Type of polarization

No impedance

IP degree of protection

IP54 EN 60530IP54 EN 61800-5-2IP54 IEC 60529IP54 IEC 61800-5-1

Option card

Communication card APOGEE FLNCommunication card BACnetCommunication card LonWorksCommunication card METASYS N2

power supply voltage limits

323...528 V

power supply frequency

50...60 Hz - 5...5 %

power supply frequency limits

47.5...63 Hz

Apparent power

52 kVA 380 V

maximum prospective line Isc

22 kA

maximum continuous output current

79 A 380 V79 A 460 V

Maximum transient current

86.9 A 60 s

Speed drive output frequency

0.5...200 Hz

Nominal switching frequency

8 kHz

Switching frequency

6...16 kHz adjustable8...16 kHz with derating factor

Speed accuracy

+/- 10 % of nominal slip 0.2 Tn to Tn

Torque accuracy

+/- 15 %

Regulation loop

Adjustable PI regulator

Motor slip compensation

AdjustableAutomatic whatever the loadNot available in voltage/frequency ratio motor control

diagnostic

for DC bus energized 1 LED (red)

Output voltage

<= power supply voltage

Insulation

Electrical between power and control

recommended type of cable for mounting in an enclosure

With UL Type 1 kit 3 UL 508 cable 104 °F (40 °C), copper 75 °C / PVCWithout mounting kit 1 IEC cable 113 °F (45 °C), copper 70 °C / PVCWithout mounting kit 1 IEC cable 113 °F (45 °C), copper 90 °C / XLPE/EPR

Electrical connection

VIA, VIB, FM, FLA, FLB, FLC, RY, RC, F, R, RES terminal 0.004 inÂ² (2.5 mmÂ²) / AWG 14L1/R, L2/S, L3/T terminal 0.08 inÂ² (50 mmÂ²) / AWG 1/0U/T1, V/T2, W/T3 terminal 0.08 inÂ² (50 mmÂ²) / AWG 1/0

Tightening torque

5.3 lbf.in (0.6 N.m) VIA, VIB, FM, FLA, FLB, FLC, RY, RC, F, R, RES)212.4 lbf.in (24 N.m), 212 lb.in U/T1, V/T2, W/T3)62.0 lbf.in (7 N.m), 62 lb.in L1/R, L2/S, L3/T)

Supply

Internal supply 24 V DC 21...27 V), <200 mA overload and short-circuit protectionInternal supply for reference potentiometer (1 to 10 kOhm) 10.5 V DC +/- 5 %, <10 mA overload and short-circuit protection

Analogue input number

Analogue input type

VIA switch-configurable current 0...20 mA 242 Ohm 11 bitsVIA switch-configurable voltage 0...10 V DC 24 V max 30000 Ohm 11 bitsVIB configurable PTC probe 0...6 probes 1500 OhmVIB configurable voltage 0...10 V DC 24 V max 30000 Ohm 11 bits

Sampling duration

F 2 ms +/- 0.5 ms discreteR 2 ms +/- 0.5 ms discreteRES 2 ms +/- 0.5 ms discreteVIA 2 ms +/- 0.5 ms analogVIB 2 ms +/- 0.5 ms analog

Response time

FLA, FLC 7 ms +/- 0.5 ms discreteFLB, FLC 7 ms +/- 0.5 ms discreteFM 2 ms +/- 0.5 ms analogRY, RC 7 ms +/- 0.5 ms discrete

Accuracy

+/- 1 % FM) for a temperature variation 60 °C+/- 0.6 % VIA) for a temperature variation 60 °C+/- 0.6 % VIB) for a temperature variation 60 °C

Linearity error

FM +/- 0.2 % outputVIA +/- 0.15 % of maximum value inputVIB +/- 0.15 % of maximum value input

Analogue output number

Analogue output type

FM switch-configurable current 0...20 mA 500 Ohm 10 bitsFM switch-configurable voltage 0...10 V DC 470 Ohm 10 bits

Discrete output number

Discrete output type

Configurable relay logic FLA, FLC) NO - 100000 cyclesConfigurable relay logic FLB, FLC) NC - 100000 cyclesConfigurable relay logic RY, RC) NO - 100000 cycles

Minimum switching current

3 mA 24 V DC configurable relay logic

Maximum switching current

2 A 250 V AC inductive cos phi = 0.4 L/R = 7 ms FL, R)2 A 30 V DC inductive cos phi = 0.4 L/R = 7 ms FL, R)5 A 250 V AC resistive cos phi = 1 L/R = 0 ms FL, R)5 A 30 V DC resistive cos phi = 1 L/R = 0 ms FL, R)

Discrete input type

F programmable 24 V DC level 1 PLC 3500 OhmR programmable 24 V DC level 1 PLC 3500 OhmRES programmable 24 V DC level 1 PLC 3500 Ohm

Discrete input logic

Negative logic (sink) F, R, RES), >= 16 V, <= 10 VPositive logic (source) F, R, RES), <= 5 V, >= 11 V

Acceleration and deceleration ramps

Linear adjustable separately from 0.01 to 3200 sAutomatic based on the load

Braking to standstill

By DC injection

Protection type

Against input phase loss driveBreak on the control circuit driveInput phase breaks driveLine supply overvoltage and undervoltage driveLine supply undervoltage driveOvercurrent between output phases and earth driveOverheating protection driveOvervoltages on the DC bus driveShort-circuit between motor phases driveThermal power stage driveMotor phase break motorThermal protection motorWith PTC probes motorAgainst exceeding limit speed drive

Insulation resistance

>= 1 mOhm 500 V DC for 1 minute

Frequency resolution

Analog input 0.024/50 HzDisplay unit 0.1 Hz

Connector Type

1 RJ45

Physical interface

2-wire RS 485

Transmission frame

RTU

Transmission Rate

9600 bps or 19200 bps

Data format

8 bits, 1 stop, odd even or no configurable parity

Number of addresses

1...247

Communication Service

Monitoring inhibitableRead holding registers (03) 2 words maximumWrite single register (06)Read device identification (43)Write multiple registers (16) 2 words maximumTime out setting from 0.1 to 100 s

marking

Operating position

Vertical +/- 10 degree

Height

34.6 in (880 mm)

Width

11.2 in (284 mm)

Depth

13.5 in (343 mm)

Noise level

64 dB 86/188/EEC

Dielectric strength

3535 V DC between earth and power terminals5092 V DC between control and power terminals

Electromagnetic compatibility

1.2/50 Âµs - 8/20 Âµs surge immunity test level 3 IEC 61000-4-5Conducted radio-frequency immunity test level 3 IEC 61000-4-6Electrical fast transient/burst immunity test level 4 IEC 61000-4-4Electrostatic discharge immunity test level 3 IEC 61000-4-2Radiated radio-frequency electromagnetic field immunity test level 3 IEC 61000-4-3Voltage dips and interruptions immunity test IEC 61000-4-11

Standards

IEC 61800-3 environments 2 category C1EN 61800-3 environments 1 category C2IEC 61800-3 environments 2 category C2IEC 61800-5-1IEC 61800-3EN 61800-3 environments 2 category C1EN 61800-3 environments 1 category C3IEC 61800-3 environments 2 category C3EN 61800-3 category C1EN 61800-3 environments 1 category C1IEC 61800-3 environments 1 category C1EN 61800-3 environments 2 category C3IEC 61800-3 environments 1 category C2EN 61800-3 environments 2 category C2EN 61800-3IEC 61800-3 category C1EN 55011 group 1 class BEN 61800-5-1IEC 61800-3 environments 1 category C3

Product Certifications

CSAC-tickNOM 117UL

Vibration resistance

1 gn 13...200 Hz)EN/IEC 60068-2-81.5 mm 3...13 Hz)EN/IEC 60068-2-6

Shock resistance

15 gn 11 ms IEC 60068-2-27

Pollution degree

3 IEC 61800-5-1

Environmental characteristic

Classes 3C1 IEC 60721-3-3Classes 3S2 IEC 60721-3-3

Relative humidity

5...95 % without condensation IEC 60068-2-35...95 % without dripping water IEC 60068-2-3

Ambient air temperature for operation

14...104 °F (-10...40 °C) without derating)104...122 °F (40...50 °C) with derating factor)

Ambient Air Temperature for Storage

-13...158 °F (-25...70 °C)