The MICROMASTER 430s are a range of 3AC-frequency inverters for controlling the speed of three phase AC motors. The various models available range from the 7,5 kW input to the 250 kW input.
The MICROMASTER 430 is especially well suited for use with pumps and ventilators when used with its factory set functions and settings.
The inverters are microprocessor-controlled and use state-of-the-art Insulated Gate BipoIar Transistor (IGBT) technology. This makes them reliable and versatile. A special pulse-width modulation method with selectable Pulse frequency permits quiet motor operation. Comprehensive protective functions provide excellent inverter and motor protection.

■ Line commutating chokes
■ Output chokes
■ LC filter
■ Gland plates
■ Basic Operator Panel 2 (BOP-2) for parameterizing the inverter
■ Communication modules
– DeviceNet
– CANopen

Technical specifications

Technical data


Mains voltage and power ranges

380 V to 480 V 3 AC  ±10 %

7.5 kW to 250 kW (variable torque)

Power frequency

47 Hz to 63 Hz

Output frequency

for inverter 7.5 kW to 90 kW

0 … 650 Hz, (limitation to 550 Hz in production to comply with legal requirements) 1)

for inverter 110 kW to 250 kW

0 Hz to 267 Hz

Power factor

≥ 0.95

Inverter efficiency

for inverter 7.5 kW to 90 kW

96 % to 97 %

for inverter 110 kW to 250 kW

97 % to 98 %

(Further information is available on the Internet at:
Overload capability

for inverter 7.5 kW to 90 kW

Overload current 1.4 x rated output current (i.e. 140 % overload capability) for 3 s and 1.1 x rated output current (i.e. 110 % overload capability) for 60 s, cycle time 300 s

for inverter 110 kW to 250 kW

Overload current 1.5 x rated output current (i.e. 150 % overload capability) for 1 s and 1.1 x rated output current (i.e. 110 % overload capability) for 60 s, cycle time 300 s

Inrush current

less than rated input current

Control method

linear V/f characteristic; quadratic V/f characteristic; multipoint characteristic (programmable V/f characteristic); flux current control (FCC); energy saving mode

Pulse frequency

for inverter 7.5 kW to 90 kW

4 kHz (standard)
2 kHz to 16 kHz (in 2-kHz-steps)

for inverter 110 kW to 250 kW

2 kHz (standard)
2 kHz to 4 kHz (in 2-kHz-steps)

Fixed frequencies

15, programmable

Skip frequency ranges

4, programmable

Setpoint resolution

0.01 Hz digital
0.01 Hz serial
10 bit analog

Digital inputs

6 fully programmable isolated digital inputs; switchable PNP/NPN

Analog inputs

2 programmable analog inputs

  • 0 V to 10 V, 0 mA to 20 mA and –10 V to +10 V (AIN1)
  • 0 V to 10 V and 0 mA to 20 mA (AIN2)
  • both can be used as 7th/8th digital input

Relay outputs

3, programmable
30 V DC/5 A (resistive load),
250 V AC/2 A (inductive load)

Analog outputs

2, programmable (0/4 mA to 20 mA)

Serial interfaces

RS-485, option RS-232

Motor cable length

for inverter 7.5 kW to 90 kW

Without output choke

max. 50 m (shielded)
max. 100 m (unshielded)

With output choke

See variant dependent options

for inverter 110 kW to 250 kW

Without output choke

max. 200 m (shielded)
max. 300 m (unshielded)

With output choke

See variant dependent options

Electromagnetic compatibility

for inverter 7.5 kW to 90 kW

Inverter with internal filter Class A available

for inverter without filter

7.5 kW to 15 kW

EMC filter Class B to EN 55 011 available as an option

18.5 kW to 90 kW

EMC filter Class B from Schaffner available as an option

110 kW to 250 kW

EMC filter Class A available as an option


DC braking, compound braking

Degree of protection


Operating temperature range

for inverter 7.5 kW to 90 kW

-10 °C to +40 °C (+14 °F to +104 °F)

for inverter 110 kW to 250 kW

0 °C to +40 °C (+32 °F to +104 °F)

Storage temperature

-40 °C to +70 °C (-40 °F to +158 °F)

Relative humidity

95 % (non-condensing)

Installation altitude

for inverter 7.5 kW to 90 kW

up to 1000 m above sea level without derating

for inverter 110 kW to 250 kW

up to 2000 m above sea level without derating

Standard SCCR
(Short Circuit Current Rating) 2)

FSC: 100 kA

Protection features for

undervoltage, overvoltage, overload, earth faults, short-circuits, stall prevention, locked motor protection, motor overtemperature, inverter overtemperature, parameter change protection

Conformity with standards

for inverter 7.5 kW to 90 kW

 UL, cUL, CE, c-tick

for inverter 110 kW to 250 kW

UL available soon, cULavailable soon, CE

CE marking

Conformity with low-voltage directive 73/23/EEC

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