1 Application range

Passive over-voltage relays are used to distinguish the over-voltage of lines and power equipment and are used as over-voltage protection.

Passive low-voltage relays are used to determine the voltage of lines and power equipment are too low, used as power loss protection or cooperate with current relays to form low-voltage lockout over-current protection.

2 Model definition

3 Working principle and main performance

3. Working principle

The AC voltage is converted by the AC converter to the AC voltage required by the relay; then the harmonics other than 50HZ are filtered through the 50HZ band pass; then the DC voltage is sent to the setting loop through rectification and filtering; the setting loop depends on changing the amplifier of the operational amplifier Multiplier to change the setting value; the output voltage UZ of the setting loop is sent to the level detector and compared with the comparison voltage UB; then the output of the relay J is driven to act.

Take AK11 structure passive relay as an example:

For PGY-90 passive overvoltage relay, under normal operation conditions UZ＜UB, relay J will not operate, the action indicator light will go out, the moving contacts 1-3, 7-19 will be disconnected, and the moving disconnection contacts 3- 17. 5-7 is closed; in the case of failure, UZ≥UB, relay J will act, the action indicator will be on, the moving contacts 1-3, 7-19 are closed, and the moving break contacts 3-17, 5-7 are disconnected.

For PDY-90 passive low-voltage relay, under normal operating conditions UZ>UB, relay J will act, the action indicator will be on, the moving contacts 1-3, 7-19 are closed, and the moving break contacts 3-17, 5 -7 is disconnected; in the case of failure, UZ≤UB, relay J will not operate, the action indicator light will go out, the moving contacts 1-3, 7-19 will open, and the moving disconnect contacts 3-17, 5-7 will 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 The protection setting value is set by the dial switch on the relay panel, the setting is intuitive and convenient, the debugging is simple and convenient, and there is no need to adjust on site.

3.2.3 Relay has action indicator light

3.2.4 The product installation structure has embedded board rear wiring and protruding board front wiring as well as standard 35mm rail type terminal block wiring, which is convenient for on-site installation and has strong versatility.

4 Technical conditions

4.1 Environmental reference conditions

Environment temperature: 20±2℃

Relative humidity: 45%～75%

Atmospheric pressure: 86～106Kpa

4.2 Normal use conditions

Ambient temperature: -10℃～+50℃

Relative humidity of environment: not more than 90%

Atmospheric pressure: 80～110KPa

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

The altitude of the place of use: no more than 2500 meters

The surrounding medium of the use 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 Characteristic parameters

4.3.1 The rated parameters are as follows:

4.3.2 Rated AC voltage: 100V;; 220V;

Rated frequency: 50HZ

4.4 Maximum power consumption: not more than 1VA under 100V

4.5 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.

4.6 AC circuit overload capacity:

AC voltage circuit: continuous work under 1.2 times the rated voltage

4.7 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.

4.8 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.

4.9 Anti-interference performance: Comply with the national GB6162-85 "Electrical Interference Test of Static Relays and Protection Devices" standard.

4.10 Electrical life: In the DC250V circuit, cut off the current τ=5ms, 50W, more than 104 times.

4.11 Mechanical life: The contact is 3 million times in no-load state.

5 Structure type (see the relay structure size diagram for details; the contact is the state when the voltage is zero)

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 the company's product samples)

5.2 JK-1/8 structure rear view wiring diagram (subject to company product samples)

5.3 DZ-1 structure terminal block type terminal 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 Use the dial switch to set according to the formula on the relay panel.

When the setting range is 25～124V, the voltage relay setting formula: U= [10□+□]+25V

When the setting range is 40～238V, the voltage relay setting formula: U= 2[10□+□]+40V

7 Ordering instructions

When ordering, please state the relay model, specification, quantity, AC rated voltage, setting range, structure and other requirements.