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ABB CEF 3/7.2kV 40A High Voltage Current-Limiting Fuse | 1YMB710725M1513 | Back-Up | Transformer Protection | 63kA Breaking | Order Available

Original ABB CEF 3/7.2kV 40A high voltage current-limiting fuse (order no. 1YMB710725M1513), IEC DIN standard transformer protection back-up current-limiting fuse-link, rated voltage 3/7.2kV, rated current 40A, rated breaking capacity 63kA, minimum breaking current 143A. Dimensions 53×192mm, rated power 12W, pre-arcing I²t 1600-1800A²s, equipped with 80N striker, sealed type, for indo

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Product Details

1. Product Overview

The ABB CEF 3/7.2kV 40A (order no. 1YMB710725M1513) is a high voltage current-limiting fuse from the ABB CEF series, an IEC DIN standard back-up current-limiting fuse-link for transformer protection, specifically designed for distribution transformer protection. This fuse is a special version without TCU (S without TCU), sealed design, equipped with an 80N medium-type striker, suitable for indoor and outdoor installation.

This fuse has a rated voltage of 3/7.2 kV, rated current of 40 A, rated frequency of 50 Hz, rated breaking capacity up to 63 kA, and minimum breaking current of 143 A. It features current-limiting design, quickly interrupting fault current before the short-circuit current reaches its peak, effectively protecting downstream equipment from short-circuit current stress.

The product dimensions are 53 mm diameter and 192 mm length, rated power 12 W, pre-arcing I²t (cold) 1600 A²s, pre-arcing I²t (total) 1800 A²s, and let-through I²t (average) 560 A²s. It is equipped with an 80N medium-type striker, which can trigger microswitches or indicator devices when the fuse operates, enabling remote alarm and status indication.

This fuse complies with international and European standards including IEC 60282-1, IEC 60287, DIN 43625, VDE 0670-T4, and VDE 0670-T402, and is widely used for distribution transformer short-circuit and overload protection in industrial power distribution, substations, compact substations, switchgear, and other applications.

2. Specifications

表格

Parameter	Value
Brand	ABB (Switzerland/Germany)
Model	CEF 3/7.2kV 40A
Order No. / Product ID	1YMB710725M1513
ABB Type Designation	1YMB710725M1513
EAN Code	5908270842120
Product Type	IEC DIN transformer protection current-limiting back-up fuse-link
Series	CEF Series
Fuse Class	Back-Up
Version	S without TCU (special version without TCU)
Rated Voltage	3 / 7.2 kV
Rated Current	40 A
Rated Frequency	50 Hz
Rated Breaking Capacity	63 kA
Minimum Breaking Current	143 A (table marked kA, suspected A)
Diameter	53 mm
Length	192 mm
Rated Power	12 W
Pre-arcing I²t (cold)	1600 A²s
Pre-arcing I²t (total)	1800 A²s
Let-through I²t (average)	560 A²s
Let-through I²t (instantaneous)	1.2 A²s
Striker	80N medium-type striker
Sealed Type	Yes (sealed, for indoor/outdoor)
Application	Distribution transformer protection
Suitable For	Switch-fuse combination
Installation Instruction	Air
Application Environment	Indoor/outdoor
Weight	~0.59 kg (table marked 590, unit to be confirmed)
Standards	IEC 60282-1, IEC 60287, DIN 43625, VDE 0670-T4, VDE 0670-T402
Technical Data Sheet	3406PL1547
Installation Manual	2401PL1560-W1-en
Country of Origin	To be confirmed by manufacturer
Stock Status	Order available

3. Key Features

High Short-Circuit Breaking Capacity — Rated breaking capacity up to 63 kA, can safely interrupt short-circuit fault currents in distribution systems, protecting transformers and downstream equipment from short-circuit current stress.
Excellent Current-Limiting Characteristics — Current-limiting design, quickly melts and interrupts fault current before the short-circuit current reaches its peak, significantly reducing the short-circuit current and thermal effects passing through downstream equipment, improving system safety.
Back-Up Transformer Protection — Back-Up fuse specifically designed for distribution transformer protection, coordinating with low-voltage side protection to provide transformer short-circuit and overload protection, a standard solution for transformer protection in distribution systems.
IEC DIN Standard Dimensions — IEC DIN standard dimensions (53×192mm), compatible with most standard fuse bases and switch-fuse combinations, easy to install and replace, good interchangeability.
Equipped with Striker — Equipped with 80N medium-type striker, when the fuse operates the striker pops out, can trigger microswitches, indicator devices, or interlock mechanisms, enabling remote alarm, status indication, and interlock protection.
Sealed Type for Indoor/Outdoor — Sealed design, suitable for indoor and outdoor installation, can operate reliably in humid and dusty environments, adapting to various industrial site environments.
Complete I²t Characteristics — Provides complete pre-arcing I²t and let-through I²t parameters (pre-arcing 1600-1800 A²s, let-through average 560 A²s), facilitating selectivity coordination analysis with upstream and downstream protection devices, achieving protection selectivity.
Compliant with Multiple International Standards — Complies with IEC 60282-1, IEC 60287, DIN 43625, VDE 0670-T4, VDE 0670-T402 and other international and European standards, product quality and performance guaranteed, globally applicable.
ABB Original Quality — Designed and manufactured by ABB, a global leading power and automation technology company, high voltage fuse products passed strict quality inspection, widely used in global power systems.
Complete Technical Documentation — Provides complete technical data sheet (3406PL1547) and installation manual (2401PL1560-W1-en), facilitating selection, installation, and maintenance.

4. Typical Applications

Distribution Transformer Protection: High-voltage side short-circuit and overload protection for 10kV/0.4kV distribution transformers, standard protection element for compact substations, pole-mounted transformers, and distribution room transformers
Industrial Power Distribution Systems: Transformer and feeder short-circuit protection in factory, mining, and enterprise internal distribution systems
Substations: Distribution transformer and station service transformer protection in small and medium-sized substations
Compact Substations: High-voltage side fuse protection in European and American style compact substations, combined with load switch to form load switch-fuse combination
Switchgear: Fuse protection in transformer cubicles of high-voltage switchgear (such as KYN28, XGN, etc.)
Switch-Fuse Combinations: Compatible with various standard switch-fuse combination appliances, achieving integrated transformer protection
Renewable Energy: Compact substation and distribution transformer protection in photovoltaic, wind power, and other new energy power stations
Infrastructure: Distribution system transformer protection in airports, ports, railways, data centers, and other infrastructure
Commercial Buildings: Distribution transformer protection in large commercial buildings, shopping centers, hospitals, etc.
Other applications requiring 3/7.2kV high voltage current-limiting fuses

5. Model Explanation

Complete Model: CEF 3/7.2kV 40A 192/53mm S without TCU

Order No.: 1YMB710725M1513

Model code breakdown:

CEF: ABB CEF series high voltage current-limiting fuse (IEC DIN standard, for transformer protection)
3/7.2: Rated voltage 3/7.2 kV (3kV system, maximum 7.2kV)
40A: Rated current 40 A
192/53mm: Dimensions 192mm (length) × 53mm (diameter)
S: Sealed / Special version
without TCU: Without TCU (TCU may be temperature control unit or other additional device)

Order No. 1YMB710725M1513 Structure:

1YMB: ABB high voltage fuse product code prefix
710725: Product series and specification code
M: Version code
1513: Configuration code

Other Rated Current Specifications in Same Series (3/7.2kV, 53×192mm):

表格

Rated Current	Breaking Capacity	Min. Breaking Current	Pre-arcing I²t (total)
10A	63kA	48A	265 A²s
16A	63kA	63A	59.5 A²s
20A	63kA	72A	130 A²s
25A	63kA	72A	280 A²s
31.5A	63kA	110A	890 A²s
40A	63kA	143A	1800 A²s
50A	63kA	215A	3375 A²s
63A	63kA	220A	1516 A²s

6. Installation & Usage Instructions

Installation Notes:

Before installation, confirm the fuse rated voltage and rated current match the system parameters
Inspect fuse appearance for damage or cracks, confirm striker is in normal position
Use dedicated fuse holders or bases, ensure good contact, avoid excessive contact resistance causing overheating
Avoid dropping and mechanical impact during installation, prevent internal fuse element damage
Always disconnect power before replacing fuses, ensure safety
Recommended to replace with the same model and specification, do not substitute arbitrarily

Usage Notes:

After fuse operation, identify and eliminate the fault cause before replacement
Back-Up fuses are mainly for short-circuit protection, overload protection should be coordinated with other protection devices
For fuses with rated current marked RC, maximum application continuous current should not exceed the RC value
Regularly inspect fuse operating status, confirm whether operated via striker or indicator device
Avoid use in systems exceeding rated voltage and breaking capacity

Coordination Selection:

When combined with load switch to form load switch-fuse combination, confirm transfer current and crossover current match
When coordinating with upstream and downstream protection devices, perform selectivity coordination analysis based on I²t characteristics
For transformer protection, select appropriate rated current based on transformer capacity, impedance, and system short-circuit current

7. Why Choose Us

Factory Order, Quality Guaranteed — All products sourced directly from ABB factory or authorized channels, ensuring genuine originals with factory packaging, certificates, and quality documents. Standard lead time 4-8 weeks, rush orders can be coordinated for expedited delivery.
Worldwide Delivery — Supports DHL, FedEx, UPS and other international couriers. Can also ship via your designated freight forwarder to 200+ countries.
Professional Technical Support — Selection consultation (rated current/voltage confirmation, breaking capacity verification, I²t selectivity coordination), technical parameter answers, and alternative model recommendation services to help you quickly identify the correct fuse model.
Flexible Procurement — Supports small-batch sample orders and large-volume project orders with tiered pricing discounts. Project-specific quotations available.
Pre-shipment Inspection — Appearance check, packaging verification, model confirmation, and continuity test performed before shipment to ensure delivered products are intact, model-accurate, and functional.

8. Frequently Asked Questions (FAQ)

Q1: What does rated voltage 3/7.2kV mean? Can it be used in 10kV systems?

A: Rated voltage 3/7.2 kV means this fuse is suitable for systems with nominal voltage 3 kV, maximum operating voltage 7.2 kV. The 3 kV is the system nominal voltage, and 7.2 kV is the maximum allowable operating voltage (corresponding to 1.2 times the maximum voltage for 3kV systems). It cannot be used in 10kV systems — for 10kV systems, select fuses with rated voltage 10/12kV (such as CEF 10/12kV series). Use in systems exceeding the rated voltage can lead to insulation breakdown and breaking failure, which is very dangerous.

Q2: What does Back-Up fuse mean? What is the difference from full-range fuses?

A: Back-Up fuses are mainly for short-circuit protection, with a higher minimum breaking current (this model is 143A). They may not reliably interrupt smaller overload currents and need to be coordinated with other overload protection devices (such as low-voltage circuit breakers, thermal relays). Full-range fuses (gG/gL class) can interrupt all currents from minimum melting current to rated breaking capacity, including overload and short-circuit currents, and can be used independently. Back-Up fuses are typically used for transformer protection because transformer overload protection is handled by the low-voltage side circuit breaker, and the high-voltage fuse is only responsible for short-circuit protection.

Q3: What is the function of the striker? Is it mandatory?

A: The striker is the fuse's operation indicator and trigger device. When the fuse element melts and operates, the striker pops out under spring force, and can:

Trigger microswitches: Send electrical signals for remote alarm and status indication
Trigger interlock mechanisms: In load switch-fuse combinations, the striker triggers the load switch tripping mechanism to open all three phases simultaneously
Mechanical indication: Visually show whether the fuse has operated This model is equipped with an 80N medium-type striker, which is standard configuration. In load switch-fuse combinations for transformer protection, the striker is mandatory for triggering the load switch three-phase opening.

Q4: What are pre-arcing I²t and let-through I²t? How are they used for selectivity coordination?

A: Pre-arcing I²t is the I²t value from when the fuse element starts melting until arcing begins, representing the energy allowed through during the melting phase. Let-through I²t is the total I²t actually allowed through during the entire breaking process, including pre-arcing and arcing phases.

In selectivity coordination analysis:

The upstream fuse's pre-arcing I²t should be greater than the downstream fuse's let-through I²t, ensuring the downstream operates first
This model has pre-arcing I²t (cold) 1600 A²s, let-through I²t (average) 560 A²s
Selectivity between upstream and downstream fuses can be determined through I²t coordination curves

Q5: Can this fuse be used outdoors? Does it need protection?

A: Yes. According to product data, this fuse is sealed type, for indoor and outdoor application. The sealed structure prevents moisture and dust from entering the fuse, adapting to outdoor environments. However, when used outdoors, it is typically installed inside a fuse base, load switch, or switchgear, with additional protection provided by the external equipment. Direct exposure to open weather is not recommended; it should be installed in an enclosure with appropriate protection rating (such as IP54 or above).

Q6: What does "without TCU" in the model mean? What is TCU?

A: According to the catalog description, this model is "S without TCU" (special version without TCU). The specific meaning of TCU is not explicitly stated in the documentation, it may be:

Temperature Control Unit
Some additional monitoring or control device
A specific version configuration code

"Without TCU" indicates this fuse is the standard version, not including that additional device. If your application requires a version with TCU, please specify when inquiring, and we can confirm if a corresponding model exists. For most standard transformer protection applications, the version without TCU is sufficient.

Q7: What is the lead time? Can you provide stock?

A: This model is currently in order available status, standard lead time 4-8 weeks (ordered from ABB factory). High voltage fuses are typically standard products, but inventory varies by rated current and voltage specification. If you have urgent needs, we can try to coordinate stock inventory or expedited ordering. Please indicate required quantity and desired delivery time when inquiring, and we will do our best to coordinate the fastest delivery solution. For large-volume project orders, advance procurement planning is recommended.

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