1 Application range
This relay is used as a blocking element for low voltage, negative sequence voltage and power direction protection to avoid malfunction of the protection when the voltage loop is broken.
2 Model definition
3 Working principle and main performance
3.1 Working principle
The AC voltages UA, UB, UC and 3U0 are converted by the AC voltage converter to the AC voltages Ua, Ub, Uc and U0 required by the relay; Ua, Ub, Uc and U0 are added by the adder, and then the 150HZ band resistance and 50HZ Band-pass filters out harmonics other than 50HZ; then it is rectified and filtered into a DC voltage and sent to the tuning loop; the tuning loop changes the tuning value by changing the amplification factor of the operational amplifier; the output voltage UZ of the tuning loop is sent to the level detection The device is compared with the comparison voltage UB; the output of the drive relay acts.
Under normal operation and asymmetric grounding short-circuit conditions, the relay will not operate; under single-phase disconnection and two-phase disconnection conditions, the relay will operate.
However, the relay cannot independently reflect the disconnection of the three voltage circuits at the same time. Such working conditions are very rare. The three-phase disconnection generally develops from single-phase or two-phase disconnection.
3.2 Main performance
3.2.1 This relay is mainly composed of integrated circuits. Stable performance, high reliability, high accuracy of the action value, small discrete value, wide setting range, fast action and return speed, good return coefficient, small load on the transformer, vibration resistance, anti-interference and high insulation level.
3.2.2 Relay debugging is simple and convenient, without adjustment on site.
3.2.3 The relay has running and action indicator lights
4 Technical conditions
4.1 Environmental reference conditions Ambient temperature: 20±2℃
Relative humidity: 45%～75%
Atmospheric pressure: 86～106Kpa
4.2 Normal use conditions
Ambient temperature: -10℃～+50℃ Ambient relative humidity: not more than 90% Atmospheric pressure: 80～110KPa Limit temperature during storage and transportation: -25℃～+70℃ Altitude of use place: not more than 2500 meters The surrounding medium of the operating environment has no explosion hazard; it does not contain corrosive gas; the concentration of conductive dust contained should not reduce the insulation level below the allowable limit value.
Reliable power supply.
4.3 Rated parameters
Rated AC voltage: 100/3 V
Rated frequency: 50HZ
Auxiliary power supply rated voltage: 220V; 110; 48V. Allowable voltage fluctuation range: 0.8 to 1.15 times the rated voltage.
4.4 Characteristic parameters
Action value range and level difference: 4V～13.9V, level difference 0.1V
Setting value error: not more than ±3% Return coefficient: not less than 0.9
Action time and return time: not more than 30mS
Third harmonic filtering ratio: not less than 50
4.5 Maximum power consumption:
AC voltage circuit: under 100V, each phase is not more than 0.5VA.
DC circuit: no more than 6W in the case of rated voltage 220VDC.
4.6 Maximum capacity of contacts:
Cut-off load capacity: DC 250V or less, τ=5ms, inductive load 50W, resistive load 150W;
AC below 250V, load 1200VA;
Allow long-term connection current: 5A.
4.7 AC voltage circuit overload capacity: continuous work at 1.2 times the rated voltage.
4.8 Insulation resistance: Use an open-circuit voltage 500V megger to measure the insulation resistance between the exposed non-charged metal parts or shells of the relays connected to each conductive terminal and should not be less than 10MΩ.
4.9 Insulation withstand voltage: each lead-out terminal to the housing locking screw can withstand a power frequency voltage of 2000V, and the same group of contacts can withstand a power frequency voltage of 1000V, which lasts for one minute without breakdown.
4.10 Anti-interference performance: meet the national GB6162-85 "Electrical Interference Test of Static Relays and Protection Devices" standard.
4.11 Electrical life: In the DC250V circuit, cut off the current τ=5ms, 50W, more than 104 times.
4.12 Mechanical life: The contact is 3 million times in no-load state.
5 Structure type (see the relay structure size diagram for details)
5.1 The rear wiring structure of the embedded board AK11, AP11 and the rear-view wiring diagram of the protruding board front wiring AQ11 (subject to company product samples)
6 Use
6.1 Before energizing the relay, confirm whether the voltage level and current value of the connected relay are consistent with the actual parameters, otherwise the relay may be damaged; check whether the relay is damaged during transportation and storage, and the relay screw fasteners should not be loose; There are damaged parts, please contact us to replace them.
6.2 According to the formula on the panel of the relay, use the dial switch to set the value.
Action range 4V～13.9V, setting formula: U=[□+0.1□+4]V
7 Ordering instructions
When ordering, please indicate the relay model, specification, quantity, structure, auxiliary power supply rated voltage, AC rated voltage and other requirements.
Language
