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ABB Softstarters
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 ABB Soft Starters – Type SSM, Medium Voltage 2300 – 13,800V. |
General Information
Key construction features
- Fused disconnect switch with blown fuse indicators and door safety interlocks rated for load break/fault make with automatic grounding arm
- Inline isolation vacuum contactor0 sized for across-the-line motor starting (optional on “soft start only” models)
- Bi-metallic thermal overload provides backup motor protection when operating in emergency bypass mode (optional on “soft start only” models)
- 120V fused control power transformer standard in line start section (optional on “soft start only” models)
- Digital controller provides solid state overload and numerous protective features for both the motor and the soft starter
- Programmable keypad with LCD and status LEOs for easy setup and operation
- Bypass vacuum contactor0 standard on all models to guarantee cool operation in all environments and extend unit life
- Heavy duty SCR (Silicon Controlled Rectifier) stack assemblies with ring transformer isolated circuit for reliable, hard-firing gate pulse
- Isolated low voltage compartment provides maximum protection for operating personnel
- Mechanically interlocked medium voltage compartment
Heavy duty SCR power assemblies
- Rated for 500 percent overload for 60 seconds
- Field-proven design in use since 1975
- Fiber optics gate-firing circuit using “ring transformer” isolation design for superior noise immunity
Industrial “real world” packaging
- Load break/fault make disconnect switch with door safety interlocking mechanism
- Isolated, noise-immune low voltage control compartment
- NEMA 12 enclosure with bypass vacuum contactor included as standard
13.8 kV saftstarters are rated NEMA 1.
13.8 kV, 600A saftstarters use circuit breakers for isolation and bypass functions. - Extra wiring space for MV cables for easy installation
