ISA-HD
60–2,500 A and 1,500–15,000 V
ISA-HD Digital Medium Voltage Transformer Starter
Advantages at a glance
- Up to 50°C ambient temperature
- Comprehensive motor protection and control package
- IP 41 as standard, up to IP65 optional
- Advanced electronic potential transformer utilizing patent pending “wireless” voltage measurement system
- Wide 45 – 65Hz range auto-frequency tracking
- Engineering included
- Automatic triggering of the firing angle (designed for marine, offshore and generator operating under continuous frequency variation)
- Innovative low voltage test – testing of complete function
- Nominal voltage test – option
- Unique, patent pending fiber-optic firing system providing complete isolation between MV and LV compartments
- Each soft starter is tested for partial discharge improving safety and ensuring long term reliability
- Synchronous motor starting, utilizing unique module
- Real-Time-Clock
Details
- IEC 62 271 – 200 tested
- MV-CS or MV-C
- LSC1, LSC2A, LSC2B
- Up to 50 kA upon request
- Incoming field
- Multi motor
- Circuit breaker
- Earth switch/Earth bolt
- MV-fuses with striker-pin indication
- Load disconnector
- Current and voltage transformer
- Power factor control
- In-line-mouting
- Tin plated busbars
- Isolated busbars
- Specially insulated cable glands
- Motor Protection Relay
- Differential Relay
- Multifunction Display
- Special thick paint
- Fan system – increased cooling
- Control voltage: 110V – 220V AC, 24V – 220V DC
- Halogen free and fire retardant materials
- Marine Version
- DIN GOST Version
- Special dimensions
- Soft start and soft stop
- Current limit
- Pump control characteristics
- Torque control
- Dual adjust
- Pulse start (kick start)
- Tacho feedback
- MSR-HD
- MSR-K
- Display
- Too many starts
- Too long starts
- Electronic shear-pin
- Short circuit protection
- Under current
- Asymmetric load
- Ground fault current
- Phase loss and phase sequence
- Over/under frequency
- Under/over voltage
- External fault
- PT 100 protection
- Shorted SCR
- Wrong motor connection
- Starter over temperature
- Power on without start signal
- Open bypass contactor
- Closed control circuit through current measuring
- Multi-function programmable I/O’s
- Opto-isolated control in- and outputs
- Transformer 8A/250V
- Analogue outputs
- Analogue inputs
- Modbus / Profibus
- Touchscreen
- SPS
Marine and offshore
- Water and ballast pumps
- Refrigeration chillers and compressors
- Hydraulic pumps and power packs
- Thrusters
- Main propulsion motors
- Cargo pumps
- Generator ready – auto frequency tracking
Industrial
- Pumps
- Compressors and chillers
- Fans and blowers
- Centrifuges
- Hydraulic systems
- Conveyors
- Mills, crusher, shredder
| System Voltage | Current | Motor | Dimensions | Weight | |||
|---|---|---|---|---|---|---|---|
| kV | A | kW | HP | W (mm) | H (mm) | D (mm) | kg |
| 2.3 | 60–1,600* | 200–5,400* | 270–7,200 | 900 | 2,300 | 1,000–1,100 | 500–1,200 |
| 3.3 | 60–1,600* | 280–7,700* | 370–10,300 | 900 | 2,300 | 1,000–1,100 | 550–1,250 |
| 4.16 | 60–1,600* | 360–9,200* | 480–13,000 | 900 | 2,300 | 1,000–1,200 | 550–1,300 |
| 6.0 | 60–1,600* | 610–14,000* | 820–18,500 | 1,100–1,500 | 2,300 | 1,100–1,500 | 850–1,350 |
| 6.6 | 60–1,600* | 670–15,500* | 900–20,500 | 1,100–1,500 | 2,300 | 1,100–1,500 | 850–1,350 |
| 10.0 | 60–1,600* | 1,020–23,000* | 1,370–30,500 | 2,400–3,500 | 2,300 | 1,200–1,400 | 2,100–2,800 |
| 11.0 | 60–1,600* | 1,120–25,500* | 1,510–34,000 | 2,400–3,500 | 2,300 | 1,200–1,400 | 2,100–2,800 |
| 13.8 | 60–1,600* | 1,410–31,500* | 1,900–42,000 | 2,800–4,200 | 2,300 | 1,200–1,400 | 2,800–3,100 |
| 15.0 | 60–1,600* | 1,530–35,000* | 2,060–46,500 | 2,800–4,200 | 2,300 | 1,200–1,400 | 3,150–4,200 |
*Higher streams and achievements on request
Approvals
1) Case by case
Current limit
The voltage increases linearly from the “Initial Voltage“ pre selected point. If the adjusted “Current Limit” is reached, the voltage will stop ramping and remain at its level until the current is reduced below the adjusted “Current Limit“ level. In that case ramp up time is prolonged until the current has reduced below “Current Limit” level
Although the current is limited the motor provides suitable torque to accelerate the driven load and reach “End of acceleration”. If the motor torque does not exceed the load torque the motor will not start. In the so rare cases severe damages might occur to the motor and starter.
Motor start measured with an oscilloscope
(Ch1, voltage; Ch2-4 current L1 – L3)
The oscillogram shows, the soft starter providing a smooth and stepless current and voltage ramp to the motor. The voltage ramps up until “Current Limit” is reached. After the motor is at nominal speed, the current will decrease, to the nominal motor current.
Pump control
Our digital Soft Starters line of products ISA-D, ISA-DS and ISA-HD provide an advanced microprocessor based control algorithm, enabling the sophisticated pump control feature. The motor torque is continuously monitored to eliminate peak
torque from stressing the motor, pump and pipe system. These soft starters provide 3 field selectable pump control algorithms.
Pump and special load control
Two major problems are associated with starting and stopping of pumps.
Over-pressure during starting
The sharp increase of torque towards the end of acceleration can cause high pressure and damage the pipe system. The pump control enables selection between three voltage ramp-up curves as well as torque curve to reduce peak torque. Current ramp is available for special loads.
Water hammer during stopping
During soft stop, when voltage is decreasing, motor torque may fall below load torque causing abrupt stalling instead of smoothly decreasing speed to zero. This creates the “water hammer” phenomenon (resulting in a loud noise and damage to the pipe system). The pump control algorithm enables selection between three voltage ramp-down curves or torque curve pre venting stall condition and eliminating water hammer.
Digital
- Illuminated LCD with 2 lines of 16 characters each
- Selectable languages: English, German, French or Spanish (aditional on request)
- The LCD indicates the motor current, fault descriptions and statistical data.
- The LEDs provide a quick status indication. (control voltage on, motor soft start, motor on, motor soft stop, motor stop, fault)
- Easy settings by six clearly marked keys, user-friendly software with factory default parameters.
Communication RS 485
RS 485 with MODBUS or PROFIBUS protocol enable:
- Remote (start, stop, etc.)
- Monitoring (motor current, faults, statistical data)
- Remote parameter setting
- Remote reset
Bypass
Internal bypass
- This reliable components bypass the power electronics after the motor is at speed.
- In addition the starters provide an auxiliary contact, allowing signaling of a successful motor start.
Attention! Many of our competitors call these auxiliary relays “a bypass contact”! - The bypass function reduces the heat dissipation and eliminates the EMC load of the system.