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Combined overcurrent and earth fault protection relays

SANDA's combined overcurrent and earth fault protection delivers comprehensive protection schemes for medium and low voltage applications. These cost-effective protective devices include three phase IDMT elements and definite time elements for overcurrent and earth fault protection.

•Three-phase, low-set overcurrent
•Three-phase, high-set overcurrent
•Low-set earth-fault
•High-set earth-fault
•Definite time for low-set and high-set

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Model Number:SD1000A
Size:Miniature
Temperature:-5℃ to +55℃
Dimension (mm):96(w) x 96(h) x 110(d)
Rated voltage:250V AC / DC
Brand Name:SANDA or OEM
Usage:Protective
Contact Load:Low Power
Mounting:Panel mounting
Contact rating:5 A
Approximate weight:0.8 kg
Theory:Electromagnetic Relay
Humidity:56 days at 93% RH and 40℃ n
Enclosure protection:IP54 at the panel
Certifications:ISO9001

    Protection Relay Description

    SANDA combined overcurrent and earth fault protection relay delivers comprehensive protection schemes for medium and low voltage applications. These cost-effective protective devices include three phase IDMT elemets and definite time elements for overcurrent and earth fault protection.

    Overcurrent relay Features:

    • Microprocessor based numerical relay

    • Current measurement based on fundamental frequency

    • Definite time for low-set and high-set

    • Five selectable IDMT characteristic curves

    • Local display of measured and set values

    • Programmable relay outputs

    • Non-volatile fault values recording

    Protection Relay Show

    electric earth fault relay protection

    Protection Relay Specifications



    RATINGS

    OUTPUT CONTACTS

    Trip Contracts(R1&R2)

    Rated current In

    5A

    Rated voltage

    250V AC/DC

    Rated frequency

    50 or 60Hz

    Contract rating

    5A

    Burden

    <0.3 VA at In

    Expectrd electrical life

    100000 operations at rated current

    Themal withstand

    4 x In continuous

    Expectrd mechanical life

    5 x 106 operations

    OVERCURRENT ELEMENT

    AUXILIARY SUPPLY

    Low-set setting >

    0.5 A to 10.0A, step 0.05A

    SD1000A-240A

    198~265 V AC

    10% to 200%, step 1%

    SD1000A-240AD

    85~265 V AC

    Low-set time multiplier(kt>)

    0.05 to 1.0, step 0.01

    110~340 V DC

    Low-set definite time(t>)

    0.05 to 99s

    Supply frequency

    50 or 60 Hz

    High-set(l>>)

    0.05 A to 99.9 A, step 0.10 A or disable

    V A rating

    3 VA typical

    10% to 1998%, step 2%

    ENVIRONMENTAL CONDITIONER

    High-set delay time(t>>)

    0.05 sec to 2.5 sec, step 0.01

    Temperature

     -5℃ to +55℃

    EARTH-FAULT ELEMENT

    Humidity

    56 days at 93% RH and 40℃ non-condensing

    Low-set setting l o>

    0.10 A to 5.0A, steo 0.05A

    MECHANICAL

    2% to 100%

    Mounting

    panel mounting

    Low-set time multiplier(kt o>)

    0.05 to 1.0, step 0.01

    Dimension(mm)

    96(w)x96(h)x110(d)

    Low-set definite time(t 0>)

    0.05 to 99s:0.10 A to 50 A,

    Approximate weight

    0.8 kg

    step 0.10 A or disable: 2% to 1000%, step 2%

    ACCURACY

    High-set delay time(t o>)

    0.05 sec to 2.5 sec, step 0.01

    protection thresholds

    ±5%

    Time delay

    ±5% with a minimum of 50 ms



    Protection Relay Chart


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