Tmax T7S/H/L 1250A MCCB 3P/4P PR332/P LI

Name: Tmax T7S/H/L 1250A MCCB 3P/4P PR332/P LI
Brand: A-B-B original
SKU: 1601291517310

Brand Name:A-B-B original
Place of Origin:China
Model Number:T7S, T7H, T7L
Rated Frequency (Hz):50/60hz
Breaking Capacity:50kA,100kA,70kA
Rated Voltage:690V
Trip Unit:Electronic adjustable
Type:Moulded Case
Poles Number:3P, 4P

Poles

Rated Current

SKU: 1601291517310 Category: Others

Description

Tmax Molded Case Circuit breaker is now available as a complete range of up to 1600 A.
–  Manually operated or Electrically operated.
– All available in the Fixed version; T4 and T5 has Plug-in version; T4, T5, T6 and T7 has Withdrawable version as well.
–  With the same frame size, the circuit-breakers are available with different breaking capacities and different rated currents.
–  IEC or UL standards

Model Number	Tmax T7S (50kA), Tmax T7H (70kA), Tmax T7L (120kA)
Pole	3 Pole, 4 Pole
Rated Current	800A, 1000A, 1250A, 1600A
Tripping Unit	PR231/P-LSI, PR232/P-LSI, PR331/P-LSIG, PR332/P-LI, PR332/P-LSI, PR332/P-LSIG
Delivery Time	15 days

Additional information

Weight	13 kg
Dimensions	23 × 23 × 23 cm
Rated Current	1250A
Poles	3P

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Tmax T7S/H/L 1250A MCCB 3P/4P PR332/P LI.

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Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.

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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.