The ABB LC1000-SSP7 is a large current plastic enclosure disconnector + overload relay module produced by ABB. It is mainly used for power distribution protection in industrial sites, featuring zone protection, high reliability, space-saving design, and ease of maintenance. Here is a detailed introduction:
I. Main Functions
Zone Protection: When the main motor of an extruder, several frequency converters, and several heating circuits share the same 380 V bus, any overload or short circuit in one of them may cause the entire production line to stop, or even trigger the overcurrent protection of the upstream circuit breakers. After the LC1000-SSP7 is integrated into the power supply circuit, it is equivalent to equipping each device with an independent “fuse + contactor + status feedback” three-in-one module, which can precisely isolate faulty equipment and prevent the accident from escalating.
Overload and Short Circuit Protection: Trip within 5 seconds when the overload is 105%, and disconnect at 6kA for short circuits. Ensure equipment safety.
Status Feedback: Through auxiliary contacts, send the “trip” signal back to the PLC, allowing the system to reduce load, trigger alarms, and record in the same scanning cycle.
Technical Specifications
Rated Voltage: 380 – 690 V AC 50/60 Hz
Rated Current: 1000A
Arc-Extinguishing Capacity: 6kA (IEC 60947-2)
Mechanical Life: 10,000 operations
Electrical Life: 2,000 operations (AC-23A)
Auxiliary Contacts: 1NO + 1NC
Trip Level: 10 levels (105% In ≤ 5 seconds)
Installation Method: 35 mm DIN rail / base plate
Size: 210 × 140 × 230 mm
Weight: Approximately 10 kilograms
Front Protection Grade: IP20 (handle protection grade IP54, with cover)
Operating Temperature: -25 … +55°C
Standard: IEC 60947-3, IEC 60947-4-1, CE, RoHS
Features and Advantages
High reliability: Adopting dual-metal temperature compensation technology, it maintains the same accuracy for -25°C cold chain warehouses and +55°C paper machine workshops.
Space-saving: The width is only 120mm, saving 30% of the cabinet space compared to the traditional circuit breaker + contactor combination of the same current rating.
Easy maintenance: After a fault trip, only the reset handle needs to be operated, without the need to replace the fuse core. The average repair time is reduced from 45 minutes to 2 minutes.
Energy saving and consumption reduction: For 1000A circuits, there is no longer a need for 3 parallel copper bars; one bus bar is sufficient, saving 20% of copper material costs.
Intelligent integration: The auxiliary contacts directly drive the AC 220V coil, eliminating the need for intermediate relays to feed the status to AC 500-eCo or 800xA high-speed input, reducing 30% of the cabinet wiring.
Application Fields
Paper machine: 400 kW vacuum pump feeder line, linked with AC 800M, automatically reduces speed after tripping to prevent sudden drop in vacuum from causing paper breakage.
Data center: Cold water main pump, uploading current and trip count through Modbus gateway to PMS to achieve predictive maintenance based on trip history.
Cement mill: 630 kW circulating fan, utilizing 6kA breaking capacity, directly disconnecting at the low-voltage side of the grid, without the need for the action of the superior 6kV switch, shortening the 200ms fault clearance time.
Compatible or Expandable Components
LC1000-S/SP5: 500A in the same housing, suitable for a small one-step power rating.
TADU 211B: Current transducer, converting 0 – 1000A into 4 – 20mA and sending it to DCS trend.
OA1000: Electric energy storage operating mechanism, achieving local/remote closing and opening.
SD833: 24Vdc power supply, providing centralized power supply for the release coil and signal lights.
TK851V010: 3m control cable, pre-installed with 1NO + 1NC terminals, plug-and-play replacement.
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