NF-SS series MCCB

Name: NF-SS series MCCB
Brand: Newtrend or OEM brand
SKU: 60046078969

Description

NF-SS series MCCB NF30-SS NF50-SS NF60-SS NF100-CS NF250-SS NF400-SS NF630-SS NF800-SS Circuit breaker

Application

NF-SS series Moulded Case Circuit Breaker is a kind of economic breaker, has the features as following, such as steady and reliable property, reasonable structure, beautiful style, small volume, etc. This breaker applies to the circuit with AC50/60Hz, rated insulation voltage 660V, max rated current 1250A as on-off operation, and take effect, it also can be used as unfrequent conversion of line and unfrequency.

Specifications

Type	Pole number	Rated current (A)	Breaking capacity (KA)
			AC(P1/P2)
			240	380	415	500	600	660
NF30-SS	2	3,5,10,15,20,30	5/5	5/2.5	2.5/1.5	2.5/1.0	–	–
	3
NF50-SS	3	10,20,30,40,50	5/10	10/7.5	7.5/5	7.5/5	2.5/1.5	–
NF60-SS	3	10,20,30,40,50,60	5/10	10/7.5	7.5/5	7.5/5	2.5/1.5	–
NF100-CS	3	60,70,100	50/42	30/20	7.5/5	15/10	10/5	5/2.5
	4
NF250-SS	3	125,150,175,200,225,250	50/42	30/20	25/15	18/15	15/10	5/2.5
	4
NF400-SS	3	250,300,350,400	85/60	50/35	25/20	35/25	25/18	15/10
	4
NF630-SS	3	500,600,630	85/60	50/35	50/30	35/25	25/18	15/10
	4
NF800-SS	3	600,700,800	85/60	50/35	50/30	35/25	25/18	15/10

Additional information

Weight	2 kg
Dimensions	25 × 25 × 25 cm
Rated Current	10A – 800A
Poles	3P, 4P

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for NF-SS series MCCB.

📥

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.

Trip Unit Protection

How to choose between Thermal-Magnetic (TMD) and Electronic (Micrologic) trip units?

Thermal-magnetic trip units provide fixed or adjustable bimetallic overload and electromagnetic instantaneous short-circuit protection, ideal for standard industrial power distribution. Electronic microprocessor trip units offer precise digital dials for L (Long-time delay overload), S (Short-time delay short-circuit), I (Instantaneous short-circuit), and G (Ground-fault protection), delivering total time-current selectivity in modern switchgear.

Ics vs Icu Capacity

What is the technical distinction between Ultimate (Icu) and Service (Ics) breaking capacity?

Icu represents the absolute maximum fault current the breaker can safely interrupt, after which inspection or replacement may be needed. Ics represents the operational breaking capacity (50%, 75%, or 100% of Icu) that the breaker can clear repeatedly and remain fully operational without performance degradation. In critical healthcare, data center, and continuous industrial applications, specify breakers with Ics = 100% Icu.

3P vs 4P Neutral

When should a 4-Pole (4P) MCCB be specified instead of a standard 3-Pole (3P) MCCB?

A 4P breaker with a switched neutral is required in systems with dual power sources (generator / utility ATS transfer) to prevent circulating neutral currents, in IT distribution networks, and in commercial installations with heavy non-linear harmonic loads (LED drivers, variable speed drives) where neutral conductor current can exceed phase currents.

Motorized & Remote Operation

How to select manual rotary handles vs motorized electric operating mechanisms?

Direct or extended door rotary handles are specified when the MCCB is enclosed inside switchgear cubicles, providing padlocking and door-interlock safety. Motor operating mechanisms (electric operators) are required for automated SCADA control, remote PLC open/close operations, and automatic transfer switch (ATS) integration.

Terminal & Mounting Options

What terminal connection hardware and mounting configurations are available?

Standard front connection lugs accept copper or aluminum compression terminals and busbar connections. For high-density panel boards, extended spreader terminals, rear connection studs, and plug-in / draw-out base cassettes are available to facilitate rapid maintenance and modular swap-out.