Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
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Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
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Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
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Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
Home Chint Electrical Materials Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer
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CHINT NM1-800S/800H 3P/4P Molded Case Breaker
CHINT NM1-800S/800H 3P/4P Molded Case Breaker

Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer

Machine Tool Control Transformer; Q/ZT258; for machine tools and industrial control panels

Model
Rated output capacity
Phase
Rated Frequency
Standard
Ambient Operating Temperature
Operating Altitude
Relative Humidity
Product type
Applicable standard
SKU: NDK Category: Chint Electrical Materials
  • Description
  • Additional information
  • Technical Datasheet & Downloads
  • Technical FAQ & Selection Guide
Description
Chint NDK
Machine Tool Control Transformer
Single-phase AC 50Hz/60Hz control transformer with Rated Output Capacity Range of 25 VA – 5000 VA.

Product Overview

The Chint NDK control transformer provides power conversion for apparatus control circuits, machine tool illumination, and indicator equipment. It operates on single-phase AC 50Hz/60Hz systems in compliance with the Q/ZT258 standard. Featuring a Rated Output Capacity Range of 25 VA – 5000 VA, it accommodates rated input voltages of 230 V and 400 V with multiple output taps from 6 V to 400 V under ambient operating temperatures between -5 ℃ and +40 ℃.

Technical Parameters

Rated output capacity 25VA~5000VA
Phase Single-phase
Rated Frequency AC 50Hz/60Hz
Standard Q/ZT258
Ambient Operating Temperature -5 ℃~+40 ℃
Operating Altitude ≤2000m
Relative Humidity ≤95%
Brand Chint
Model NDK
Product type Machine Tool Control Transformer
Applicable standard Q/ZT258

Key Selling Points

✓ Rated Output Capacity Range: comprehensive selection from 25 VA up to 5000 VA.
✓ Dual rated input voltage ratings of 230 V and 400 V for AC 50Hz/60Hz frequency supply.
✓ Wide secondary voltage options delivering 6 V, 12 V, 24 V, 36 V, 110 V, 127 V, 230 V, and 400 V.
✓ Standardized construction meeting Q/ZT258 requirements for machine tool and apparatus control.
✓ Operating performance rated for -5 ℃ to +40 ℃ ambient temperature, altitude ≤2000m, and relative humidity ≤95%.

Technical Highlights

  • Rated Output Capacity Range: 25 VA – 5000 VA
  • Phase: Single-phase
  • Rated Frequency: AC 50Hz/60Hz
  • Rated Input Voltage: 230 V, 400 V
  • Rated Output Voltage: 6 V, 12 V, 24 V, 36 V, 110 V, 127 V, 230 V, 400 V
  • Standard: Q/ZT258
  • Ambient Operating Temperature: -5 ℃~+40 ℃
  • Operating Altitude and Humidity: ≤2000m, ≤95% relative humidity

Reference Datasheet Pages

The following pages were selected from the model catalogue and are included for technical reference:

NDK Catalog and Technical Data

NDK technical catalog page 1

NDK technical catalog page 2

Additional information
Rated output capacity

25VA~5000VA

Phase

Single-phase

Rated Frequency

AC 50Hz/60Hz

Standard

Q/ZT258

Ambient Operating Temperature

-5 ℃~+40 ℃

Operating Altitude

≤2000m

Relative Humidity

≤95%

Brand

Chint

Model

NDK

Product type

Machine Tool Control Transformer

Applicable standard

Q/ZT258

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Chint NDK Single Phase 25VA-5000VA 12V 24V 110V 230V 400V Step-Down Machine Tool Transformer CHNT NDK Control Transformer.

📥
Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.
Request Official Datasheet (PDF)
📐
2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.
Request CAD Model
Certified Standards: IEC 60898-1, IEC 60947-2, CE, RoHS, ISO 9001:2015
Manufacturer: Shanghai Newtrend Electric Co., Ltd. (Global Export Compliance)
Engineering Support: 24-hour response for custom voltage ratings, auxiliary contacts, and technical consulting.
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.

Voltage & Load Sizing

How to verify rated operational voltage, frequency, and load duty cycle?

A

Verify that the nominal line voltage (AC 230V single-phase or 400V/415V/690V three-phase at 50/60Hz, or DC voltage ratings) falls within the continuous maximum operating limits of the device. Check duty cycle ratings (continuous vs intermittent duty) to ensure thermal stability under full load.

Protection & Environment

What ingress protection (IP Rating) and environmental enclosures are recommended?

A

For clean indoor electrical rooms, standard IP20 modular DIN-rail housings are recommended. For outdoor, industrial washdown, or dusty environments, mount components inside weatherproof enclosures rated IP65/IP66 with UV-resistant polycarbonate or powder-coated steel enclosures equipped with compression cable glands.

Selectivity & Grading

How to ensure upstream and downstream coordination in power distribution boards?

A

Ensure proper discrimination by grading current thresholds and tripping time delays: upstream devices should have higher current ratings and intentional short-time delays (Class S), allowing downstream branch MCBs to clear localized faults without blacking out the entire facility.

Installation & Mounting

What mounting rails, busbars, and spatial clearances are required?

A

Components mount on standard symmetrical 35mm DIN rail (EN 60715 / TH35-7.5) or backplate screw fixings. Maintain recommended top/bottom ventilation gaps (typically 30–50mm) to ensure unrestricted air convection, and use standard pin/fork comb busbars to minimize contact resistance and wiring errors.

Conductor & Torque Sizing

What conductor sizes and terminal tightening torques should be applied?

A

Select copper or aluminum conductor cross-sections complying with IEC 60364-5-52 current-carrying capacity tables based on continuous load. Always use a calibrated torque screwdriver or torque wrench to tighten terminal screws to the manufacturer-specified torque to prevent hot-spot degradation and loose connections.

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