Numerical Transformer Differential Relay JND 040

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We have expertise in providing our customers with a diverse range of durable, performance-oriented, projectile Numerical Transformer Differential Relay.

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Minimum Order Quantity:: Not mentioned

Payment Terms:: Cash,Cheque,Demand Draft

JVS Electronics Pvt Ltd

India

Business Type:: Manufacturer, Distributor / Wholesaler

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Aaryaa M S
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Product manufactured In:: India

Type :: Numerical Transformer Differential Relay

Model Number :: JND 040

Voltage :: Plus-Minus 5%

Frequency :: Plus-Minus 0.02Hz

Phase Angle :: Plus-Minus 2%

Operating time :: Plus-Minus 5%

Operating time :: Typical 35ms

High st operating time :: Typical 30ms

Accuracy Test :: IEC 60255-3

Insulation Test :: IEC 60255-5

Primary current rating :: 0.577A / 1A / 2.89A / 5A

Secondary current rating :: 0.577A / 1A / 2.89A / 5A

Pickup (ik) :: 0.10 to 1.00pu in steps of 0.05pu

Slope1 (Df1) :: 10 to 100% in steps of 5%

Slope2 (Df2) :: 50 to 200% in steps of 5%

Breakpoint (kp) :: 1.0 to 10.0pu in steps of 0.1pu

Differential Hiset :: 2 to 20pu in steps of 1pu

CT Ratio W1 :: 0.5 to 2.00pu in steps of 0.01pu

CT Ratio W2 :: 0.5 to 2.00pu in steps of 0.01pu

Inrush (2f) :: 10 to 50% in steps of 5%

Loaded contact :: 10,000 operations min.

Unloaded contact :: 100,000 operations min

Additional Details

JND 040 provides differential protection for power transformer. The relay measures the line current of each phase from each of the windings of the transformer. Relay calculates the differential current (Id) and restraining current (Ir) per phase. The differential characteristics define the operating and the restraining regions. The shape of the characteristics defined by Initial pickup (ik), SLOPE1 (DF1), SLOPE2 (DF2) and break point (kp) are programmable. If ‘Ir’ is less than ‘kp’, then characteristics is defined by ‘DF1’ and is applicable for small differential currents. If ‘Ir’ is greater than or equal to ‘kp’, then characteristics is defined by ‘DF2’ and is applicable for large differential currents. If the operating point i.e. (Id, Ir) is within the operating region, then the relay trips. The relay provides programmable 2nd and 5th harmonic current restraint, which, exist when transformer is energized and over excitation condition exists respectively. The relay provides stability on external “line to line” and “line to ground” faults. The relay has in-built vector group compensation selection and CT ratio correction, hence the usage of external interposing CT can be avoided.

Characteristics:

Biased current differential protection

Fast differential Hi-set

Dual slope characteristics

Inbuilt CT Ratio correction factor

Adjustable 2nd harmonic restraint

Adjustable 5th harmonic blocking

Inbuilt Vector group compensation

Two groups of settings

History of 5 latest faults

Application:

JND 040 is a two winding numerical transformer differential relay. The relay is used for protection of power transformer against hazardous internal faults.

Aux. Supply :

20 – 60V DC

75 - 150V AC /DC

175 – 300V DC or

185 – 250V AC

Contact Ratings:

Make & carry:

1250VA with max. current 5A or max. Voltage 660V AC

1000W with max. current 5A or max. Voltage 250V DC

Break:

2500 VA with max current 10A or max. Voltage 660V AC

200 W (resistive) 100 W (inductive) with max.

current 10A or max. Voltage 250V DC

With almost more than a decade of experience and rich technological expertise, we are able to offer a precision designed range of Electrical Protection Instruments.

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