Medium- controllers

Series 81000TM 2.3 kV to 6.9 kV

latched contactors, and load-break switches in one lineup. The user can also connect directly to Siemens type GM-SG medium-voltage metal-clad What is a MVC? Series 81000TM MVCs Overview switchgear with a transition section. In a medium-voltage controller (MVC), The Siemens Series 81000TM MVC has a This provides extreme flexibility in one or more vacuum controllers are modular design consisting of one or systems design. used to start and stop medium-voltage more contactors, housed in a free- Stationary controllers include: motors, switch small medium-voltage standing sheet steel enclosure. Each , or switch small capacitor controller is NEMA Class E2 and in- ·· Full Voltage (FVNR) banks. The controllers employ fuses for cludes three current-limiting fuses. The ·· Reduced Voltage Primary Reactor short circuit protection and in combi- enclosure is designed for front access, (RVPR) nation with a contractor are suitable allowing the equipment to be located for frequent load switching. against a wall or back-to-back. ·· Reduced Voltage (RVAT) Why Siemens? The design and manufacture of the Series 81000TM MVC unit is based on ·· Load Break Switches (LBS). Siemens’ experience as one of the our experience as a leading manufac- Drawout Controllers include: largest manufacturers of motors world- turer of motors worldwide. The ben- wide provides us with the knowledge efits of this experience result in control ·· Full Voltage (FVNR) to design and manufacture one of the scheme flexibility and increased safety. leading motor controllers. The benefits Typical applications include: ·· Reduced Voltage Primary Reactor of this experience result in control (RVPR) scheme flexibility and increased safety, ·· Squirrel-cage induction motors while simplifying operations and (non-reversing, reversing, or ·· Reduced Voltage Autotransofmer maintenance and minimizing installa- multi-speed) (RVAT) tion costs. This experience, which has ·· Reduced Voltage Solid State (SSRV) been gained in over 50 years of supply- ·· Reduced-voltage starters (auto- ing MVCs in the U.S., has been cap- , reactor, or solid-state ·· Brushless Synchronous (BL-SYNCH) type) tured in the design of the Siemens ·· type Synchronous (BT- Series 81000TM MVC. These are de- ·· Synchronous motors (brush or SYNCH) signed for use in industrial plants, brushless type) commercial buildings, electric utility generating plants, cogeneration instal- ·· Transformer feeders lations, and other electrical systems. ·· Capacitor bank feeders Siemens has a large product offering for MVCs including: ·· and power bus feeders (tie). ·· Motor control The utilization voltage range for con- ·· Switchgear trollers is 2.3 kV through 13.8 kV. The Series 81000TM MVC can be used as a ·· Motors retrofit of older MVCs such as the 456 ·· Drives SpaceMaker and older series 81000 models through the latest 96H and ·· Relays 97H starters. ·· Meters The Series 81000TM MVC allows the ·· and Automation. user to combine vacuum contactors, 360A Vacuum Contactor usa.siemens.com/assetservices ·· Two Speed Two Winding (2S2W) troller has built in “dual adjustment” ·· Mounted on wheeled drawout control. Heavy duty design allows ramp carriage for easy access ·· Two Speed One Winding (2S1W) 2 to be FVNR if needed. The second ·· Fuse Pullers not required. ·· Wound (WR) ramp is able to be selected as “loaded start” or any other operation change. A Blow Fuse Protection (Optional) ·· Reversing. solid state reduced voltage controller is ·· Protects against single phasing Latched Contactor able to eliminate torque shock. Soft starting provides smooth, stepless ·· Mechanically driven MVCs utilize a latched contactor. The increase in torque. This is adjustable contactor remains closed on loss of over time and strength with little or no ·· One open fuse de-energizes main power. Per NEMA, the front panel mechanical damage. coil circuit. mechanical release is standard. The latched contactor has an electric Drawout Contactor Racking Interlocks release or trip push button. There is ·· Minimum downtime The racking interlocks have closed door also an optional capacitor trip. This operation and cannot be opened, design is appropriate for non-motor ·· Fully interlocked inserted, or racked out when the loads. ·· Convenience, ease of maintenance contactor is closed. They are padlock- Solid State Reduced Voltage able in the OFF position with up to ·· Single stroke handle action for three padlocks. The automatic shutter A solid state reduced voltage controller racking is driven by racking operation. The design is available for the full HP ·· Positive interlocks. unsulating material is non-metallic. range. This uses a standard drawout The shutters are contactor driven and contractor or fuse carriage as a means The drawout contactor is available in not gravity or spring operated. Dual for main isolation. There is a standard three-high construction if the main bus shutter design is available for genera- fixed-mounted bypass contactor. is in the top hat. There is minimum tor or tie applications. Motortronics heavy duty Soft Start floor space and steel barriers through- module employs Silicon Controlled out. The materials used for the struc- Stationary Controller Rectifiers (SCRs) to vary the starting tures are #11GA steel frames, #12GA ·· 400A visible blade disconnect voltage to provide stepless acceleration steel doors, and #14GA end sheets, top (non-load break isolation) and uses standard Series 81000TM sheets, and back sheets. construction. The heavy duty chassis ·· Fixed power fuses (bolt-in) The Siemens Vacuum Interrupter ratings are 500% for 60 seconds, which ·· Fixed 360A vacuum contactor is 30 seconds longer than the nearest contains a ceramic insulator, stainless competitor. At 600% for 30 or more steel bellows, and a visible contact ·· Ideal for stand-alone applications seconds, the controller is capable of wear mark so that no special tool is required. ·· Ideal for customers who prefer starting Class 30 “Mill Duty” motors. isolation switches to drawout Operating at 200% for up to two 720A Vacuum controllers minutes allows for long acceleration times. ·· Siemens 96H6 (Toshiba 720A ·· Specifically developed for com- vacuum contactor) pressor OEM and export market Why Soft Start? ·· Control Power Transformer 750VA ·· Optional horizontal bus. ·· Eliminate torque shock damage (optional up to 3kVA) and primary Take Away ·· Increase motor and drive train fuses reliability ·· Drawout fuse carriage ·· 3 - high starter arrangement ·· Keep starting kVA to a minimum ·· Fixed vacuum contactor ·· Latched contactor as alternative to circuit breaker for smaller loads ·· Maintain future flexibility ·· Silver plated disconnect fingers. ·· Ease of maintenance through ·· Soft start and soft stop pumps to Power Fuses proven design control water hammer ·· ANSI Class R fuses for motor ·· No special tools required ·· Reduce hydraulic/mechanical prob- protection lems ·· Wide product range (starter types ·· ANSI Class E for non-motor loads and ratings) ·· 10:1 cost ratio vs. MV VFDs. ·· Blown fuse trip bar (optional on ·· Large Siemens product offering. The Solid State Reduced Voltage Con- drawout unit)

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