CHINT NJR5-ZX3 380V Online Soft Starter 30kW/75kW/280kW

Name: CHINT NJR5-ZX3 380V Online Soft Starter 30kW/75kW/280kW
Brand: CHINT
SKU: 1770404365790617600

Brand Name:Chint
Place of Origin:China
Model Number:NJR5-ZX
Rated Power:4KW to 900KW
Type:Online Soft Starter

Power (kW)

SKU: 1770404365790617600 Category: Others

Description

Chint NJR5-ZX series soft starter is an online soft starter, its input power voltage (main circuit voltage) is AC220V, AC380V, AC460V, AC575V and AC690V, and the rated current specification is from 15A to 1000A. With the characteristics of strong load adaptability, stable and reliable operation, etc., it is widely used in motor transmission equipme nt in metallurgy, petroleum, fire protection, mining, water supply, municipal, food, cement, petrochemical and other fields. It is the most ideal replacement product for a traditional star-delta starter, auto-coupling starting.

Chint NJR5-ZX series soft starter is an AC asynchronous motor soft starter integrating power electronics technology, microprocessor technology and modern control theory technology. By controlling the three-phase parallel thyristor connected in series between the power supply and the controlled motor, the functions of soft start and soft stop of the three-phase AC asynchronous motor can be realized. This product can effe ctively control the starting current and the starting torque can be widely used in loads such as fans, water pumps, compressors, ball mills, and crushers.

Standards: IEC60947-4-2

Additional information

Power (kW)	5.5kW, 7.5kW, 11kW, 15kW, 18.5kW, 22kW, 30kW, 37kW, 45kW, 55kW, 75kW, 90kW, 110kW, 132kW, 160kW, 185kW, 200kW, 220kW, 250kW, 280kW, 315kW, 355kW, 400kW, 450kW, 500kW

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for CHINT NJR5-ZX3 380V Online Soft Starter 30kW/75kW/280kW.

📥

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)?

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?

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?

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?

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?

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.