12 pulse Variable Frequency Drive for ESP
Most popular low harmonic VFD
12 pulse drive module built-in
The diode rectifier and inverter are sealed in the same enclosure. Two separated, parallel 6 pulse diode bridges composed of 12 pulse rectifiers in the input and two input AC reactors are used to balance the power supply.
Reliable and economical 12 pulse VFD
Compared to the two parallel 6 pulse drive modules solution, there is one output sine wave filter instead of two sine wave filters, which are used to balance the output current. Smaller footprint, lower cost, and higher reliability.
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Specifications
Input power supply3 phase 380V to 480V ±10%, 50/60Hz ±5%
Converter type 12 pulse diode rectifier 
Inverter type IGBTs 
Input current protectionCircuit breaker
Input surge suppression IEC test classification / EN type: II/T2 

Maximum continuous voltage: 350V(L-PE)

ISCCR: 50kA (max.200A gG) 

Voltage protection level: 1500V

In: 20kA 8/20 μs

Imax: 40kA 8/20 μs 
Input power balance Standard input AC reactors 
Output voltageThe same as power supply 
Output frequency 0.1Hz to 90Hz 
Output waveform High performance Sinewave 
Motor control Constant or Variable Torque (V/F) 
Motor technologyInduction motor (IM)
Efficiency >96% at full load
Power factor0.98 across entire speed range 
Overload rating 120% for 1min/5min 
Certifications ISO9001, ISO14001, CE
Enclosure rating Junction box & main power section: IP66 [ equivalent to NEMA4 ] 

Magnetics section: IP24 [ equivalent to NEMA3R ] 

Backpack section: IP24 [ equivalent to NEMA3R ] 
Cooling system IP66: air-conditioning unit, heat sink

IP24: forced air cooling 
Altitude 0 to 1000m without derating 
Ambient operating temperature-30℃ to 55
Relative humidity20% to 95% maximum(noncondensing) 
H2S protectionConformal-coated PCBs & bus bars
Material Carbon steel, the thickness is 2.5mm 
Line-side termination Circuit breaker’s lugs in power junction box 
Load-side terminationLugs in power junction box 
Control terminationMounting plate on the dedicated swing door 
Safety features Emergency stop button

Electronic interlocks

Separated power and control sections 

Backspin indication LED on the front door 

Prewired IO junction box 
Analog inputs (AI) Qty 2: 4-20mA, resolution 12 bits 
Digital inputs (DI) Qty 5: DC24V, sink wiring 
Digital outputs (DO) Qty 4: relay output, NO, up to 5A 
Serial communicationQty 1: RS485 Modbus Master (for DHS) 

Qty 1: RS485 Modbus Slave (for SCADA) 


Hotline
+86-22-27606488
Address
No.15-1, Ligang Park, Shuanggang Industry Zone, Jinnan District, Tianjin
E-mail
zhangyu@dcus.cn guoliwei@dcus.cn
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