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Motor Protective Relay |
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1. Protection for 3 phase motor with certain in any cases: over load, single phase operating, reverse, even earth fault. 2. Wide range of current setting and time setting in one unit. 3. Input circuit is equipped with “surge” protection circuit for no error. 4. Built in semiconductor H-IC circuit : And strong against shock and vibration. 5. D4E type protects motor from earth fault with ZCT. |
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Deseription |
D3E |
D4E |
Motor rating |
Circuit voltage |
Less than AC 600V(3Φ), Primary voltage |
Rated current |
AC 1-80A to 64-160A, primary current |
Rated voltage |
AC 110V, AC220V, AC380V (3 Φ) |
Extent voltage |
85%~110% of Rated Voltage |
Frequency |
50/60Hz common |
Contact capacity |
AC 120V 10A, AC 250V 6A (cosΦ=1.0), DC 30V 5A AC 250V 3A (cosΦ=0.4) |
Power consumption |
Control power |
AC 110V, 220V, 380V |
AC 110V,220V, 380V |
VA |
3.5VA |
7VA |
10VA |
Element of over load |
Operating Value |
Operation 115% of current set value (105~125%) |
Operating time Curve |
Inverse |
Inverse, Definite (Ground) |
Operating time |
When over load 600% of current set Operating time tap×1(1~10sec) Operating time tap×4(4~40sec) |
Inverse: Same as 3E Ground Fault: More than Current set value |
Instantaneous Value |
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5~80A (연속기반) |
Reset |
More than 100% of current set value |
Element of open phase |
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Less than 75% of current set value |
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H(high sensitivity set ±3510%, L(low sensitivity)65±10% |
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Less than 4sec |
Element of reverse phase |
Value of Operation |
Less than 80% rated voltage |
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Less than 1sec |
Starting Lock |
Starting hold time 5sec/10se/15sec |
SL (Start Lock) Ambient temperature |
ON(operating) OFF(Non operating) Operating value : ±10%(-10℃~+50℃), operating time: ±20% |
Insulation resistance |
Primary-case Secondary-case |
More than 10㏁ |
Dielectric strength |
Primary-case Secondary-case Multually dry contact |
: AC 2000V 1minute |
: AC 1000V 1minute |
Impulse wave withstand voltage |
1.2/50㎲ positive, negative polarity : 3times Electric circuit to case : 5kV |
Aux power to terminal : 4.5kV |
Over load |
P'ry current circuit |
Multiple 20 of current set value |
factor |
Control power circuit |
Multiple 1.15 of rated voltage (3 Hours) |
Vibration strength |
Vibration frequency 16: 7hz, amp;itude 4mm |
Mechanical shock resistance |
500m/s 2 (50g) | | |
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