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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SD1000A OC&EF 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
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SD1000A OC&EF Protection Relay Show |
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SD1000A OC&EF Protection Relay Specifications |
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RATINGS |
OUTPUT CONTACTS |
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Trip Contracts(R1&R2) |
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Rated current In |
5A |
Rated voltage |
250V AC/DC |
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Rated frequency |
50 or 60Hz |
Contract rating |
5A |
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Burden |
＜0.3 VA at In |
Expectrd electrical life |
100000 operations at rated current |
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Themal withstand |
4 x In continuous |
Expectrd mechanical life |
5 x 106 operations |
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OVERCURRENT ELEMENT |
AUXILIARY SUPPLY |
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Low-set setting > |
0.5 A to 10.0A, step 0.05A |
SD1000A-240A |
198～265 V AC |
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10% to 200%, step 1% |
SD1000A-240AD |
85～265 V AC |
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Low-set time multiplier(kt>) |
0.05 to 1.0, step 0.01 |
110～340 V DC |
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Low-set definite time(t>) |
0.05 to 99s |
Supply frequency |
50 or 60 Hz |
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High-set(l>>) |
0.05 A to 99.9 A, step 0.10 A or disable |
V A rating |
3 VA typical |
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10% to 1998%, step 2% |
ENVIRONMENTAL CONDITIONER |
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High-set delay time(t>>) |
0.05 sec to 2.5 sec, step 0.01 |
Temperature |
-5℃ to +55℃ |
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EARTH-FAULT ELEMENT |
Humidity |
56 days at 93% RH and 40℃ non-condensing |
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Low-set setting l o> |
0.10 A to 5.0A, steo 0.05A |
MECHANICAL |
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2% to 100% |
Mounting |
panel mounting |
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Low-set time multiplier(kt o>) |
0.05 to 1.0, step 0.01 |
Dimension(mm) |
96(w)x96(h)x110(d) |
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Low-set definite time(t 0>) |
0.05 to 99s:0.10 A to 50 A, |
Approximate weight |
0.8 kg |
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step 0.10 A or disable: 2% to 1000%, step 2% |
ACCURACY |
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High-set delay time(t o>) |
0.05 sec to 2.5 sec, step 0.01 |
protection thresholds |
±5% |
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Time delay |
±5% with a minimum of 50 ms |
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SD1000A OC&EF Protection Relay Chart |
Tips: All specifications for reference only, please confirm with us before placing orders.
