Switchgear & Protection Lab

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Numerical Differential Protection of Alternator Demo Panel: (% Differential Protection):
Make: XEEPL, Model SGP-ALT

It is also called as Merz-Price Protection of Alternator.

• Numerical Differential Protection Relay: It is designed using high-speed micro DSP, which sample all three-phase current through CT connection. The high-speed micro-controller samples this current through a 12-bit A/D converter. The micro-controller performs powerful Digital Algorithms to find out Amplitude of current signal, then this value is use for protection and metering function. All measurement is tuned to fundamental frequency. Each input current is also displayed on 20 x 4 LCD display for metering. This relay is provided with Triple slope characteristics for Protection i.e.

1. Zero Bias Slope : Pickup range is from 10% to 100% in steps of 5%.
2. Differential Bias Slope: Bias range is from 10% to 50% in steps of 5%.
3. 2nd Bias Slope: The bias current value at which relay shift to 2nd Bias from 100% to 400% in steps of 100%.

• Alternator: 3kVA, 3 Phase, 415V, 1500 rpm, Star connected alternator, separately exited.
• Field Excitation : 220V DC, 2A
• Prime Mover: 3HP 1500rpm 220V DC Shunt Motor.
• Aux. Supply for Control Panel : 1 Phase, 230V AC
• Aux. Supply for DC Motor: 220V DC 15A source to be connected externally with 4 point starter.
• Short Circuit Protection: HRC FUSE + MCB.
• Operating Frequency : 50 Hz
• Panel metering :

            •    0-500V, Digital AC voltmeter (96x96 sq.mm )
            •    0-300V, Digital AC voltmeter (96x96 sq.mm )
            •    0-20A, Digital AC Ammeter (96x96 sq.mm )
            •    0-10A, Digital AC Ammeter (96x96 sq.mm )
            •    0-199.999 sec. Digital Timer (96x96 sq.mm )

• Short Circuit Protection: HRC Fuses & MCB.
• OPTIONAL: The Relay Comes with two communication Ports, RS232 on Front and RS 485 at Rear. The unit uses IEC870-5-103 Communication Protocol.
• OPTIONAL:  Various Protective relays Also Can be used as under in a Panel or Separate Module:
• (Micro-controlled/ Microprocessor based)
• Definite time over-current relay.
• Under Over Frequency protection relay.
• Negative Phase Sequence Relay.
• Reverse Power Relay.
• Earth fault relay.

Additional Information:

• Item Code: SGP-ALT
• Production Capacity: 20
• Delivery Time: 4 Weeks
• Packaging Details: Wooden

Product Price :Get Latest Price

• Numerical Differential Protection Relay: It is designed using high-speed micro DSP, which sample all three-phase current through CT connection. The high-speed micro-controller samples this current through a 12-bit A/D converter. The micro-controller performs powerful Digital Algorithms to find out Amplitude of current signal, then this value is use for protection and metering function. All measurement is tuned to fundamental frequency. Each input current is also displayed on 20 x 4 LCD display for metering. This relay is provided with Triple slope characteristics for Protection i.e.

1. Zero Bias Slope : Pickup range is from 10% to 100% in steps of 5%.
2. Differential Bias Slope: Bias range is from 10% to 50% in steps of 5%.
3. 2nd Bias Slope: The bias current value at which relay shift to 2nd Bias from 100% to 400% in steps of 100%.

• Transformer : 3kVA, 415/415V (star-star/ star-delta)

• Power Supply : 3ph 415V AC, 50Hz

• Load : Resistive load (Optional)

• Temperature  Range : -5°C to 50°C

• Panel metering :

• Short Circuit Protection: HRC Fuses & MCB.
• Optional: The Relay Comes with two communication Ports, RS232 on Front and RS 485 at Rear. The unit uses IEC870-5-103 Communication Protocol.

Additional Information:

• Item Code: SGP-TX
• Production Capacity: 10
• Delivery Time: 4 Weeks
• Packaging Details: Wooden