LC1F1250 LC1F1400 LC1F1700 LC1F2150 LC1F3150 Contactor 110V 220V 380V 440V 3POLE 1250A 1400A 1700A 2150A 2600A 3150A Contactor
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LC1-F High Current AC Contactor (1250A-3150A)
Electricity Type:AC
Brand Name:Newtrend or OEM brand
Place of Origin:China
Model Number:LC1F
Phase:3
Main Circuit Rating Current:115A ~ 3150A
type:Magnetic contactor
Brand Name:Newtrend or OEM brand
Place of Origin:China
Model Number:LC1F
Phase:3
Main Circuit Rating Current:115A ~ 3150A
type:Magnetic contactor
Number of Pole
Main Circuit Rating Voltage
Description
Additional information
| Weight | 2 kg |
|---|---|
| Dimensions | 25 × 25 × 25 cm |
| Number of Pole |
3 |
| Main Circuit Rating Voltage |
<1000V |
Technical Datasheet & Downloads
Technical Documentation & Product Specifications
Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for LC1-F High Current AC Contactor (1250A-3150A).
Official Technical Datasheet (PDF)
Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.
2D/3D CAD & Dimensional Drawings
STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.
Technical FAQ & Selection Guide
Frequently Asked Technical Questions & Selection Guide
Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.
AC-1 / AC-3 Duty
How to calculate contactor rating based on motor power and utilization categories (AC-1 vs AC-3 vs AC-4)?
A
AC-3 rating applies to standard squirrel-cage motor starting and stopping during normal run (starting current 5–7x In). For non-inductive or purely resistive heating loads, use the higher AC-1 rating. For severe inching, jogging, and plugging applications (AC-4 duty), derate the contactor or upsize by 1 to 2 frame sizes to prevent contact erosion.
Coil Voltage Selection
How to choose the correct control coil voltage, frequency, and electronic wide-voltage options?
A
Standard AC coils include 24V, 48V, 110V, 220V/230V, 380V at 50/60Hz. For DC control loops or PLC outputs, specify DC coils or electronic wide-range AC/DC coils (e.g. 100V–250V AC/DC) which feature built-in surge suppression, low holding power consumption, and immunity to voltage dips.
Overload Coordination
How to size and coordinate the matching thermal overload relay (TOR) for Type 2 protection?
A
Select a thermal overload relay whose current setting range straddles the motor full-load current (FLA). Set the dial precisely to 1.0x motor nameplate FLA. For IEC 60947-4-1 Type 2 coordination, pair the contactor and relay with backed-up upstream fuses or fast-acting MCB/MCCB to prevent welding under fault conditions.
Auxiliary & Interlocks
What auxiliary contact blocks and mechanical interlocks can be added for motor reversing?
A
Units feature built-in 1NO or 1NC auxiliary contacts, expandable with top-mounted 2-pole or 4-pole auxiliary contact blocks (F4 / AX) and pneumatic timer delay blocks. For forward/reverse motor starters or star-delta starter assemblies, add side-mounted mechanical interlock units (MI) with electrical interlocking.
Ambient & Altitude Derating
How do ambient temperature and installation altitude affect contactor performance?
A
Standard ratings are calibrated for -5°C to +40°C. For ambient temperatures exceeding 55°C or altitudes above 2000m (where reduced air density diminishes heat dissipation and dielectric insulation), derate operational current by 2% per 100m above 2000m and verify insulation voltage limits per IEC standards.
