For more than two decades W-Series variable frequency drives, built on Robicon field-proven expertise, have reliably served the drive needs of U.S. municipal water and wastewater utilities - representing the largest installed base among all drives currently in service within the industry . And with the integration of SINAMICS technology and features backed by Siemens' total solution and system capabilities, the best has become even better.
Each W-Series drive is custom-configured to meet the particular requirements of each water/wastewater project, based on a broad range of base units, a choice of both clean power and standard front ends, and an extensive selection of standard and custom options.
NEMA 1 enclosure, with blowers (optional NEMA 12 ventilated with air filters)
UL listing per UL508C (UL file E319311)
Short circuit current rating (SCCR) 65 kA
Circuit breaker disconnect with flange mount operator handle, mechanically interlocked with the enclosure door
Door mounted operator panel mounted for easy start-up and operation
Available with Seismic Certification
Siemens Robicon W-Series drives are available with optional seismic certification > more information below
W1206-Pulse Enclosed Drive
W120CP18-Pulse Clean Power Enclosed Drive
W150CP18-Pulse Clean Power Enclosed Drive
3AC 460 - 480V, 60 Hz
1 – 200 HP
50 – 200 HP
250 – 800 HP
• Base NEMA 1• Option NEMA 12
Options in base
• O/P reactor• Bypass
• O/P reactor• Bypass (< 500 HP)
Options in separate enclosure (UL508A)
• O/P contactor• O/P filter• RVSS bypass
• O/P contactor• O/P filter• RVSS bypass• Bypass (500 HP+)
Seismic Certificate (IBC)
The Robicon W120 is a standard 6-pulse drive available in wall mount and floor standing enclosures. It can be equipped with a wide variety of pre-engineered and custom options.
Seismic certification is available for installation in essential facilities - see
Seismic Certification tab for more details.
Clean power drives include an 18-pulse rectifier front end combined with a patented phase-shifting autotransformer.
IEEE sets minimum harmonic distortion limits for voltage and current. With the W Series Clean Power unit's multi-pulse, phase-shifting design, the Clean Power models more than meet distortion limits for the 5th, 7th, 11th and 13th harmonics in accordance with Table 10.3 of IEEE 519-1992
Available seismic certification for use in essential facilities
No line side harmonic disturbances
Elimination of external power factor correction devices and their associated costs
Avoidance of utility penalties for poor power factor
Improved voltage regulation
Avoidance of overloading feeders, breakers and transformers with reactive power
Compatible with operation on generator supplies and weak power systems. Unlike harmonic filters, Clean Power 18-pulse drives do not present capacitive loads that cause voltage increases at low loads, a frequent cause of problems on weak or emergency supplies
Low loss operation especially at partial loads. Alternative technologies that use front ends with active switching devices (IGBTs) have high switching losses at all loads - unavoidable when regenerative operation is required but not desirable on pump and fan drives whose main purpose is energy savings
The Robicon W-Series range of variable frequency drives is designed specifically to meet the needs of infrastructure projects including the municipal water industry .All Robicon W-Series drives are now available with seismic certification per the following standards:
International Building Code (IBC 2012), for use in essential facilities in all regions of the USA. Please refer to the Certificate of Compliance for details > Watch a short video
State of California Office of Statewide Health Planning and Development (OSHPD) Approval
Specialized Nuclear Facilities Testing (Robicon W120CP 18-pulse clean power drive rated at 125 HP, 460V) > Watch a short video