Disjuntor em caixa moldada Chint DZ108-20 (MCCB)

Chint DZ108-20 is a disjuntor em caixa moldada (MCCB), mainly designed for the protection of electric motors and power distribution lines.

Scope of Application

Applicable to AC circuits with a frequency of 50Hz or 60Hz, rated voltage up to 380V and below, and rated current ranging from 0.1A to 20A. It can serve as overload and short-circuit protection for electric motors, as well as overload and short-circuit protection for lines and power supply equipment in power distribution networks. Adicionalmente, it can be used for infrequent switching of lines and infrequent starting and switching of electric motors.

Model Significance

DZ stands for molded case circuit breaker; 108 is the design serial number; 20 represents the rated current of the frame size. The subsequent combination of numbers indicates the auxiliary contact combination code and service category code, etc..

Structural Features

Equipped with a bimetallic strip inverse-time delay release and an electromagnetic instantaneous release. The overload release is provided with a temperature compensation device. The operation mode is push-button control, adopting front-panel wiring and front-panel mounting, with an installation clamp plate, which can be directly mounted on a standard 35mm-wide guide rail.

Main Technical Parameters

Quadro atual: 20UM

Setting Current Range: Multiple specifications are available, including 0.1-0.16A, 0.16-0.25UM, 0.25-0.4UM, 0.4-0.63UM, 0.63-1UM, 1-1.6UM, 1.6-2.5UM, 2-3.2UM, 2.5-4UM, 4-6.3UM, 5-8UM, 6.3-10UM, 8-12.5UM, 10-16UM, 14-20UM, etc..

Número do pólo: 3 postes

Tensão nominal de isolamento: 660V

Auxiliary Contacts: Usually 1NO+1NC (um normalmente aberto e outro normalmente fechado)

Informações sobre preços

The promotional price on Chint Electric official mall is 53.38 CNY per unit, and the market price is 124.13 CNY per unit. Contact via WhatsApp: 0086-13811255435.

Chint DZ108-20 is a 3-pole molded case circuit breaker dedicated to motor protection, focusing on the overload and short-circuit protection of motors. Chint DZ47-63 is a multi-pole miniature circuit breaker (MCB), mainly designed for the protection of power distribution and lighting lines. The two products are significantly different in core positioning, parameters and structure. The following is a structured comparison and selection suggestion:

Core Difference Overview Table

Key Detail Analysis

1. Different Protection Positioning (Core Difference)

– DZ108-20: The release is specially designed for motors. Its inverse-time characteristic matches the motor overload curve. The instantaneous tripping multiple (10–14In) can avoid the motor starting inrush current, and the temperature compensation ensures protection accuracy.

– DZ47-63: The C-type curve is suitable for lighting/general loads, and the D-type curve can be used for power distribution. No entanto, it lacks the temperature compensation and special release adjustment necessary for motor protection. Direct application to motors may cause misoperation or protection failure.

2. Specification & Adaptability

– DZ108-20: It has multiple fine-tuning gears for current (por exemplo, 0.1–0.16A, 14–20A, etc.), suitable for low-power motors with a current of 0.1–20A. The fixed 3-pole design meets the requirements of three-phase motors.

– DZ47-63: It features flexible pole numbers and tripping curves, covering power distribution scenarios with a current of 1–63A. It has more flexible installation and wiring methods, suitable for civil and general industrial power distribution.

3. Structure & Accessories

– DZ108-20: Push-button operation, with built-in 1NO+1NC auxiliary contacts, facilitating the linkage of motor control circuits.

– DZ47-63: Handle operation, contatos auxiliares, shunt release/undervoltage release and other accessories are optional, making it more suitable for the expansion needs of power distribution systems.