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JOYELEC

DC protection and metering on DIN rail

Two DIN rail products, and one of them publishes the figure its whole family omits.

Four and a half kiloamps

The DC breaker states a breaking capacity of 4.5 kA — the largest fault current it can interrupt without destroying itself.

That is the rating describing the worst day rather than an ordinary one, and across both DC breakers in this catalogue, one gives it.

The rest of the breaker

16 A at 500 V DC, two poles, flame-retardant housing with copper internals, 35 mm DIN rail with screw terminals.

Still left blank here

A trip curve. “Highly sensitive with a fast response” is an adjective, and a curve — B, C or D — is what tells you whether an inverter can start behind it without tripping it.

And polarity, which on a DC breaker decides how the arc is blown into the chute.

The meter

Three-phase four-wire, 5 to 100 A, four modules. Its tolerance is written as ±1 with no unit, which cannot be read as printed — one percent and one digit mean different things, and the page says so rather than choosing.

Everything JOYELEC puts on these shelves, one page each

  • JOYELEC two-pole DC circuit breaker on a DIN rail

    JOYELEC Pair of 16 A two-pole DC breakers, 500 V, 4.5 kA

    Two 16 A two-pole DC miniature circuit breakers rated 500 V DC with a 4.5 kA breaking capacity, in a flame-retardant housing for 35 mm DIN rail.

    Rated current
    16 A, from the title
    DC voltage rating
    500 V DC, from the title and the second bullet
    Breaking capacity
    4.5 kA, second bullet — the only breaking capacity published in this family
    Polarity
    Nowhere in the listing
    Poles
    Two, from the title
    Trip curve
    Nowhere in the listing — described as highly sensitive with a fast response, which is not a curve
    Mounting
    In a distribution box or on 35 mm DIN rail with screw terminals, fifth bullet
    Amazon reference
    B0DXKXZVVD (same reference on 4 Amazon marketplaces)
    EAN
    0734038559499
    • A breaking capacity with a figure — 4.5 kA — which nothing else in this family publishes
    • 500 V DC and 16 A both stated, plainly
    • No trip curve, so what it does at switch-on is unknown

    Best for: A 16 A string on a photovoltaic array that has a DIN rail to mount it on.

    ≈ €12
    Check price on Amazon
  • JOYELEC three-phase DIN rail energy meter with an LCD

    JOYELEC Three-phase four-wire, 5–100 A, 3 × 230/400 V, pulse output

    A three-phase four-wire DIN rail energy meter for 3 × 230/400 V at 5 to 100 A, with a pulse counter and an LCD, in a four-module case.

    Maximum current
    5 to 100 A, from the title
    Direct or CT measurement
    Direct
    Phases
    Three phase, four wire, 3 × 230 V / 400 V, 50/60 Hz, from the title
    Accuracy class
    Described as first-level precision with a permissible error within ±1, third bullet — NO UNIT IS GIVEN, so the figure cannot be read as a percentage or a class
    Protocol
    A pulse counter, from the title; no rate is published
    Width
    4P size, fifth bullet
    Reset behaviour
    Nowhere in the listing
    Amazon reference
    B0D9JG2N3X (same reference on 6 Amazon marketplaces)
    EAN
    0788362821388
    • Three-phase four-wire at a price close to single-phase meters
    • Electromagnetic interference resistance and low self-consumption both named
    • The tolerance is written as ±1 with no unit, so it cannot be read

    Best for: A three-phase workshop or distribution board where the total matters more than the class.

    ≈ £27 / €20
    Check price on Amazon

A price quoted in the text of a PowerVerdict page dates from the day that page was written; the live figure beside each product is fetched while you read and replaces it.