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  • New itemTop seller   Padlock, security | left-hand thread | for substations and electrical distribution panels | without key | SP-1
    New itemTop seller   Padlock, security | left-hand thread | for substations and electrical distribution panels | without key | SP-1 1
    New itemTop seller   Padlock, security | left-hand thread | for substations and electrical distribution panels | without key | SP-1 2

    Padlock, security | left-hand thread | for substations and electrical distribution panels | without key | SP-1

    Code: ES-LT-SP-1
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    Price 7.26 € VAT incl.
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    SP-1 is a traditional Lithuanian security padlock with a left-hand thread, designed for locking electrical substations and distribution panels. It protects against unauthorised entry into electrical cabinets and substations – such locks have been used for decades by distribution network and substation operators. The product is sold without a key – the key is ordered separately.

  • Product description

    Padlock, security | left-hand thread | for substations and electrical distribution panels | without key | SP-1

    SP-1 is a traditional Lithuanian security padlock with a left-hand thread, designed for locking electrical substations and distribution panels. It protects against unauthorised entry into electrical cabinets and substations – such locks have been used for decades by distribution network and substation operators. The product is sold without a key – the key is ordered separately.

    Main point:
    Substation and distribution point locks are traditionally opened not with an ordinary key entering the lock core, but with a special threaded key that screws onto the lock body. SP-1 has a left-hand thread, so it can only be opened by someone who has the specific SP-1 left-hand-thread key – a right-hand-thread key (used with model SP-1D) does not fit here. This lets the operator separate groups of locks by thread direction and control who can open which sites.
    Thread direction
    left-hand
    Set contents
    without key (key sold separately)
    Purpose
    substations, electrical distribution panels
    Compatible key
    left-hand thread only (ID 643)

    Operating principle

    The lock is fitted to the handle or locking loop of a substation or distribution panel door, like an ordinary padlock. The difference from ordinary domestic locks is the opening mechanism: instead of a key inserted into the lock core, a threaded key is used, which screws onto the lock body and, depending on the thread direction, releases the locking mechanism.

    SP-1's thread is left-hand, so it requires a key made for that specific direction. At a site where substations are locked with locks of different thread directions (SP-1 – left-hand, SP-1D – right-hand), different employees or services can hold keys only to their assigned group of substations – a practical way of separating access without additional electronics.

    What makes SP-1 useful?
    It is a cheap and proven solution for restricting access to electrical equipment, without installing an electronic access system. Since the lock is sold without a key, the operator can order as many locks as needed for the sites, and distribute keys separately, only to authorised persons.

    Technical specifications

    Model SP-1
    Product type Security padlock (without key)
    Thread direction Left-hand
    Purpose Substations, electrical distribution panels
    Set contents Without key – key sold separately
    Compatible key Left-hand thread only (ID 643)
    Related model SP-1D – the same lock with a right-hand thread (key ID 8817)
    Category Electrical distribution and installation accessories > security padlocks, multi-lock and cable locks

    Key features

    • Left-hand thread – opened only with a threaded key of the matching direction, not an ordinary lock key.
    • Protection against unauthorised entry – designed for locking substation and distribution panel doors and loops.
    • Sold separately from the key – the lock and key are sold separately, allowing flexible management of how many locks and keys a site needs.
    • Access separation by thread direction – left- and right-hand thread (SP-1 / SP-1D) locks can be used for different groups or services.
    • Traditional solution – a long-established practice for locking substations, used in Lithuanian distribution networks.
    • Mechanical, no electronics – no power supply, batteries or programming needed, works in any weather conditions.

    Where is it used?

    • Locking electrical substation doors and loops
    • Locking electrical distribution panels
    • Protecting distribution points and transformer stations from unauthorised persons
    • Sites where access needs to be separated by thread direction (left / right)
    • Sites serviced by distribution network operators
    • Locations where old SP-1 locks are being replaced with new ones of the same standard

    Use by need

    For home users.
    This lock is designed primarily for substations and distribution panels, not domestic use – for domestic objects (sheds, gates) an ordinary household lock with a standard key would be simpler and more universal.
    For businesses and industry.
    For a network operator or site operator, SP-1 allows managing access to several substations: locks and keys are ordered separately, so it is possible to have more locks than keys and control who is issued a key.
    For electricians / engineers.
    When ordering, it is important not to mistake the thread direction – SP-1 (left-hand) and SP-1D (right-hand) keys are not interchangeable, so the lock and key model must match.

    Practical application

    A distribution network operator maintains several substations in a district and wants only its own technical staff to be able to open them. The required number of SP-1 locks is ordered to lock the substations, together with several SP-1 left-hand-thread keys (ID 643) – as many as there are crews or employees with the right to access the sites; the keys are issued only to them, while the locks remain installed at all substations.

    Pros

    • Proven solution – traditionally used for locking substations and distribution points.
    • Access control – it is possible to have more locks than keys and restrict who can enter a site.
    • No electronics needed – a mechanical solution that works with no power supply.
    • Compatibility with the SP-1D system – site groups can be separated by thread direction.
    • Only the lock can be replaced – if the lock wears out or more are needed, it can be ordered separately from the key.
    • Clearly defined purpose – designed specifically for electrical substations and distribution panels.

    Cons / limitations

    • Sold without a key – the lock alone is non-functional, the key (ID 643) must be ordered separately.
    • The key must be specifically a left-hand thread – an SP-1D (right-hand thread) key does not fit.
    • The manufacturer is not stated in the source, so the specific model's manufacturer is not mentioned in this description.
    • The source does not state the lock's material, dimensions or corrosion resistance data, so these parameters are not given in this description.
    • Not suitable for general domestic use – designed for a specific substation/panel locking standard, not a universal lock.

    Safety and installation notes

    • Before ordering, make sure you need specifically the left-hand-thread model SP-1, not the right-hand-thread SP-1D.
    • Order the required quantity of the separately sold keys (ID 643) together with the lock.
    • Keep and distribute keys only to authorised persons – this is the only access-restriction element in this system.
    • Before installation, check that the lock closes freely on the substation's or panel's locking loop.
    • If all keys are lost, opening the lock may require dismantling or replacing it – keep at least one spare key in a secure place.
    • At sites with several substations, mark which ones are assigned SP-1 (left-hand), to avoid confusion over thread direction.

    Quick selection guide

    Thread direction
    left-hand
    Set contents
    without key (key sold separately)
    Purpose
    substations, electrical distribution panels
    Compatible key
    left-hand thread only (ID 643)
    Suitable when you need to:
    • lock a substation's or distribution panel's door with a left-hand-thread lock;
    • separate access to sites by thread direction (left / right);
    • have more locks than keys and control who the keys are issued to.
    Check before use:
    • whether you need specifically the left-hand, not the right-hand, thread model;
    • whether the separate key (ID 643) has also been ordered – the lock does not open without it;
    • whether the lock's locking loop fits your substation's or panel's construction;
    • who the keys will be issued to and how they will be tracked.
    Important reminder:
    SP-1 is a mechanical lock with no key included in the set; it does not replace the site's overall security system or alarm; without a separately ordered compatible key (ID 643) the lock cannot be opened.

    FAQ

    Does the SP-1 set include a key?
    No, the lock is sold without a key – the key (ID 643) is ordered separately.
    What is the difference between SP-1 and SP-1D?
    SP-1 has a left-hand thread, SP-1D a right-hand thread; their keys are not interchangeable.
    Is it suitable for a domestic cabinet or gate?
    The product is designed for substations and electrical distribution panels; for general domestic use an ordinary household lock would be simpler.
    Can a right-hand-thread key be used with SP-1?
    No, a left-hand-thread key matching SP-1 is required.
    Who makes SP-1?
    The manufacturer is not stated in the source, so it is not mentioned in this description.
    How many locks and keys should be ordered for a site?
    Locks – according to the number of substations or panels, keys – according to the number of employees or services granted access; locks and keys can be ordered in different quantities.

    Padlock, security | left-hand thread

    SP-1 is a security padlock with a left-hand thread, designed for locking electrical substations and distribution panels, sold without a key. It is used together with a separately sold left-hand-thread key (ID 643) and lets the operator separate access to sites from the right-hand-thread model SP-1D system.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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