Exceltech SS Electronic Soft Starter
- Brand
- Exceltech
- Model number
- SS
- Category
- Soft Starters
Thyristor soft starter kit for three-phase motors on 415 / 440 V, with external bypass contactor: soft start and soft stop ramps of 1 – 180 s, initial voltage 1 – 60%. Easy to retrofit.
Price and availability on request
Key features
- Simple, robust and easy to retrofit into existing installations
- Thyristor voltage control for soft starting and stopping
- Low power loss: the thyristors are in circuit only during soft start and soft stop; an external bypass contactor carries the running current
- Soft start: initial torque set by pedestal voltage, ramp-up time 1 – 180 s
- Soft stop: ramp-down time 1 – 180 s, mainly for pumps, where it prevents water hammer
- Can be combined with an Exceltech microcontroller-based motor protection device (overload, unbalance, single phasing, locked rotor, short circuit, earth fault)
- On-board start and stop push buttons, and remote operation
- Built-in potential-free relay contact to switch the external bypass contactor
Specifications
| Rated insulation voltage | 600 V |
|---|---|
| Rated operating voltage | 415 / 440 V AC +10% / −15%, 3 phase, 50 Hz |
| Rated control supply voltage | 230 V AC ±15%, 1 phase, 50 Hz |
| Recommended load | Three-phase AC motor (multiple motors or other loads only in specific circumstances) |
| Overload capacity | 115% continuous, 150% for 10 s, 200% for 5 s |
| Thyristor voltage rating | 1400 – 1600 PIV |
| Display | LED seven-segment with 4-key keypad |
|---|---|
| Ramp time during start | 1 – 180 s |
| Ramp time during stop | 1 – 180 s |
| Pedestal (initial) voltage | 1 – 60% |
| Signal relay | One changeover relay for the bypass contactor |
| Digital inputs | 3 (start, stop, emergency stop) |
| Internal | Over temperature and transient voltage |
|---|---|
| Heat sink over temperature | Thermal switch with normally closed contact output (external 2-way terminal) |
| SCR protection | MOV transient voltage suppressors across the input supply; RC snubber across the SCRs against misfiring from a rapid rise of voltage |
| Main circuit | Provided with protection for the external bypass contactor |
| Ambient temperature | Operation −25 °C – +60 °C; storage −40 °C – +70 °C |
|---|---|
| Altitude | Up to 1000 m (derate above 1000 m) |
| Degree of protection | Main circuit IP00; supply and control circuit IP20 |
| Cooling | Air cooled below 250 hp; fan cooled for 250 hp and above |
Specifications are from the manufacturer's published information. Confirm critical values with us or the datasheet before ordering.