Packaging Details
- Unit Type: piece
- Package Weight: 0.300kg (0.66lb.)
- Package Size: 15cm x 10cm x 10cm (5.91in x 3.94in x 3.94in)
ow.productDescripti
TVR2000 series three-phase power monitor (over-under voltage, phase, phase sequence protection relay)
Do not use this product on the output side of the inverter!
First, the scope
TVR2000 series three-phase power monitor is mainly used for three-phase AC 50 / 60Hz, rated voltage of 80 ~ 690V circuit, as the three-phase motor input power of three-phase voltage unbalance, phase, reverse phase, the supply voltage is too high or too low to provide protection, this protection by providing the drawing wiring, the general is a three-phase power supply side sampling!
When the power supply is normal, relay, normally open contact (NO), normally closed contact (NC) off, the green LED lights up; when there is a power of one or more abnormal, the relay is released, often open contact (NO) off, normally closed contact (NC) closed. Green LED is off, the corresponding fault LED lights.
Second, the protection function description
1, three-phase voltage unbalance and phase loss protection: voltage unbalance or negative sequence is too high, generally 1% voltage unbalance can cause 3% to 11% of phase current imbalance, negative sequence component not acting, all into heat, serious voltage unbalance will lead the motor overheating and burning. At a time when the device is equipped with overload protection device generally not been able to play a protective role. Voltage unbalance rate is higher than 9.5 ± 1.5%, the protection action (delay time <1.5 seconds); when the imbalance is lower than 6.5 ± 1.5% automatic reply.
(When the protected equipment (motor) when running or stopping status, any one phase open-phase fault occurs, this is an extreme case of three-phase voltage imbalance, static phase-phase voltage unbalance rate of 100% Dynamic phase-phase voltage unbalance rate> 5% to 20% due to the counter electromotive force generated by the motor running so that this dynamic phase voltage phase is not zero, can only be judged by detecting three-phase voltage unbalance way protection). Once the phase fault protection action occurs, the normal (NORMAL) green LED is off, phase (PHASE LOSS) red LED lights up, the relay releases. And no right or wrong phase and undervoltage fault detection, fault attention at this phase (REVERSAL) red LED, under / over voltage (UN / OV VOLTAGE) yellow LED might also be lit.!
2-phase protection: L1, L2, L3 three-phase wiring is correct, normal (NORMAL) green LED lights, relay; if the sequence is wrong, the normal (NORMAL) green LED is not lit, out of phase (REVERSAL) red LED lights up, as long as the exchange of L1, L2, L3 any two of the three phases, the product will be able to identify the phase sequence and work normally, with anti-misconnection protection.
3, over-voltage, under-voltage protection: three-phase induction motors at rated voltage when the highest efficiency. When the supply voltage is too high will increase the no-load excitation current, causing the motor efficiency drops and heat; a decline in motor power output overload will cause brownouts, serious cause motor stall, over the scope of protection should not be under voltage low , or due to the voltage fluctuations caused by frequent protection action. When the grid voltage three-phase average voltage is too low or too high under / overvoltage (UN / OV VOLTAGE) yellow LED is lit, relay does not release at this time, when the voltage is too low or too high for 8 seconds or more of the product only identified as undervoltage or overvoltage fault, the relay release action, and normal (NORMAL) green LED off.
Third, the technical data
1, three-phase power protection from the current size of the monitor circuit or load, impulse influence current imbalance current and load properties. Capable of full performance, all-weather long-term work. Power ≤1.0W;
2, this product meets the GB / T 14048.1-2000, GB14048.5-2001 eqv IEC60947-1: 1999;
3, anti-surge voltage 5000VAC, isolation 4000VAC;
4, the main circuit: Rated voltage (3Φ690VAC less, 50 / 60Hz universal)
5, auxiliary circuits:
Rated working voltage: 250VAC or 30VDC
Rated operating current: 250VAC2A, 30VDC1.5A
380VAC3.5A (16A), 110VDC3A (overweight in brackets)
Rated thermal current: 5A
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