science

Type 7 connector

Type 7 connector is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Type 7 connector rather than just read about it. In short: The IS 17017 Type 7 connector (often referred to as LECCS for Light Electric Combined Charging System) is used for charging electric two-wheelers and electric three-wheelers, mainly within India, as it is one of two DC plug standards described in IS 17017-2. The Type 7 connector is a combined alternating current (AC) and direct current (DC) charging system.

Key takeaways

Type 7 connector belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Type 7 connector to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Type 7 connector from memory before moving on to harder problems.

Reference excerpt

The IS 17017 Type 7 connector (often referred to as LECCS for Light Electric Combined Charging System) is used for charging electric two-wheelers and electric three-wheelers, mainly within India, as it is one of two DC plug standards described in IS 17017-2. The Type 7 connector is a combined alternating current (AC) and direct current (DC) charging system. It has since been formally approved by the Bureau of Indian Standards (BIS) and published as Indian Standard IS 17017 (Part 2/Section 7):2023. The Type 6 connector (IS 17017) (also known as LEVDC) is the corresponding DC-only connector standard used in India for light electric vehicles. Type 7 connectors are derived from the need to provide a unified charging interface that handles both AC and DC charging through a single port. The battery management system on the electric vehicle negotiates the maximum current with the electric vehicle supply equipment via dedicated pins in the Type 7 connector using CAN bus communication. The Type 7 connectors support both AC charging (up to 7.7 kW) and DC fast charging (up to 12 kW). Type 7 connectors feature an energized latch on the vehicle-side inlet for secure connection, distinguishing them from Type 6 connectors which use mechanical latches on the charger side.

History In 2020, Ather Energy began development of a combined charging interface specifically for electric two-wheelers, in collaboration with various government bodies and industry stakeholders, including NITI Aayog, the Department of Science and Technology, the Automotive Research Association of India (ARAI), EV manufacturers, and the Bureau of Indian Standards (BIS). The development aimed to address the fragmentation in India's two-wheeler charging infrastructure, where over 10 different connector types were being used by various manufacturers. In 2021, Ather Energy open-sourced its fast-charging connector technology, making the intellectual property (IP) freely available to other manufacturers and charging infrastructure operators. This strategic decision was made to create an interoperable charging ecosystem and encourage industry-wide adoption. In October 2023, the LECCS connector received formal approval from the Bureau of Indian Standards (BIS) and was published as Indian Standard IS 17017 (Part 2/Section 7):2023. An additional specification, IS 17017 – Part 31:2024, was published in February 2024. This standardization made the Type 7 connector an officially recognized charging standard in India for light electric vehicles.

Technical specifications

Design The Type 7 connector integrates both AC and DC charging capabilities into a single, unified interface, distinguishing it from other charging connectors that require separate ports for AC and DC charging. The connector is compact and lightweight, making it suitable for the form factor constraints of two-wheelers and three-wheelers. As specified by IS 17017, vehicles are fitted with a female vehicle inlet, whilst charging stations are fitted with a male connector, either directly on the outside of the charging station, or via a flexible cable with permanently attached connector on the end. The Type 7 connector features an energized latching system on the vehicle-side inlet to secure the connection during charging. Unlike Type 6 connectors where the locking mechanism is on the charger side, the Type 7 system places this functionality on the vehicle side, providing a different approach to connection security.

Power ratings The Type 7 connector supports:

AC charging: Up to 7.7 kW (240 V, 32 A single-phase) DC fast charging: Up to 12 kW (120 V, 100 A) With DC fast charging capabilities, a typical electric scooter can charge to 80% capacity in under an hour, with some chargers capable of adding approximately 15 km of range in 10 minutes of charging.

Pin configuration

The connectors contain seven contact places arranged in a specific pattern. The pins are always used for the following purposes:

Proximity pilot (PP): Pre-insertion signaling Control pilot (CP): Post-insertion signaling and initial handshake Protective earth (PE): Full-current protective earthing system CAN High: Communication via CAN bus protocol CAN Low: Communication via CAN bus protocol AC/DC power pins: Dual-purpose contacts for both AC and DC power transmission Communication takes place over the CAN bus (CAN High and CAN Low pins) for data exchange between the charger and vehicle after the initial control pilot (CP) handshake. This protocol ensures that the highest common denominator of voltage and current is selected for safe and efficient charging. The connector supports up to 100 A current rating for DC charging applications.

Adoption

Manufacturers Several electric vehicle manufacturers have adopted the Type 7 connector standard for their products:

Ather Energy – Original developer, uses LECCS on all current models including the Ather 450 series and Ather Rizta Hero MotoCorp – Implemented on the Vida V1 electric scooter Matter Motors – Adopted LECCS for their electric two-wheeler lineup The Energy Company – Battery pack manufacturer supporting the LECCS standard According to industry reports, the LECCS connector is compatible with over 90% of India's electric two-wheelers as of 2025.

Infrastructure As of January 2026, the LECCS charging network has grown significantly across India and neighboring countries:

More than 5,000 public fast chargers equipped with the Type 7 connector Network spans over 395 cities across India Approximately 3,675 chargers operated directly by Ather Energy Additional 1,400+ chargers operated by partner charging networks Over 30 fast chargers operational in Nepal and Sri Lanka Major charging infrastructure operators supporting Type 7 include:

Bolt.Earth – First charging company to launch universal fast chargers with Type 7 compatibility, offering 3 kW, 6 kW, and 12 kW variants Kazam – Multi-brand charging network operator EVamp – Charging infrastructure provider Massive Mobility – Manufacturer of Type 7 compatible chargers

Comparison with other standards

Type 6 connector The Type 7 connector is often compared with the Type 6 connector (IS 17017) (also known as Dash-6 or LEVDC), which is another charging standard for light electric vehicles in India. Key differences include:

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Type 7 connector

Start with the simplest possible case. Write down what Type 7 connector claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Type 7 connector before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Type 7 connector ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Type 7 connector

In research: Type 7 connector appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Type 7 connector in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Type 7 connector is common in secondary-school and first-year university syllabi. It links to neighbouring topics Automotive standards, Electric vehicle technologies, Indian inventions, so understanding it makes those chapters shorter.
In everyday life: Look for Type 7 connector outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Type 7 connector in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Type 7 connector means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Type 7 connector out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Type 7 connector in simple terms?

Why does Type 7 connector matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Type 7 connector?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Type 7 connector.