1 Application range

This relay is used as a blocking element for the high-voltage bus to close the grounding switch to prevent the grounding switch when the high-voltage bus is energized.

2 Model definition

3 Working principle and main performance

3.1 Working principle

The AC voltages UA, UB, UC are converted by the AC voltage converter to the AC voltage required by the relay-Ua, Ub and Uc;-Ua, Ub and Uc are added by the adder, and then filtered by the 150HZ band stop and 50HZ band pass Harmonics other than 50HZ; then through rectification and filtering, the DC voltage is sent to the setting circuit; the setting circuit changes the setting value by changing the magnification of the operational amplifier; the output voltage UZ of the setting circuit is sent to the level detector and the comparison voltage UB compares; drive relay outlet action.

In the normal operation of the relay, single-phase disconnection and two-phase disconnection, the relay will act to block the output and it is not allowed to close the grounding switch.

When the monitoring related high-voltage bus has no power, the relay returns, the lock is released, and the grounding switch is allowed to be closed.

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

4.1 Environmental reference conditions Ambient temperature: 20±2℃

Relative humidity: 45%～75%

Atmospheric pressure: 86～106Kpa

4.2 Normal use conditions

Ambient temperature: -10℃～+50℃ Relative humidity: not more than 90% Atmospheric pressure: 80～110Kpa

Limit temperature during storage and transportation: -25℃～+70℃

4.3 Rated parameters

Rated AC voltage: 100/3 V

Rated frequency: 50HZ

Rated voltage of auxiliary power supply: 220V; 110V; 48V. Allowable voltage fluctuation range: 0.8 to 1.15 times the rated voltage.

4.4 Characteristic parameters

Action value under three-phase positive sequence symmetry: the default is 10V, without continuous adjustment; it can be customized according to the actual requirements of users.

Return coefficient: not less than 0.9

Action time and return time: not more than 30mS

4.5 Maximum power consumption:

AC voltage circuit: under 100/3 V, 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 Embedded board rear wiring structure AK11, AP11 and protruding board front wiring AQ11 rear view wiring diagram (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 Calibration method of characteristic parameters:

Connect according to the 5th wiring diagram, and debug under normal use conditions:

A. Measure the action value under the condition of three-phase positive sequence symmetry, the action value defaults to 10V.

B. The action value in the case of B-phase disconnection or C-phase disconnection should be 2/3 times the action value in the case of three-phase positive sequence symmetry. That is, the operating value is approximately 11.55V.

C. The action value in the case of A phase disconnection or any two-phase disconnection should be twice the action value in the case of three-phase positive sequence symmetry. That is, the operating value is about 20V.

7 Ordering instructions

When ordering, please indicate the relay model, specification, quantity, structure, auxiliary power supply rated voltage, AC rated voltage and other requirements.